Audit Information |
12 Months Ended |
|---|---|
Dec. 31, 2025 | |
| Audit Information [Abstract] | |
| Auditor Name | Deloitte & Touche LLP |
| Auditor Location | Seattle, Washington |
| Auditor Firm ID | 34 |
Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Statement of Financial Position [Abstract] | ||
| Allowance for credit losses | $ 226 | $ 176 |
| Allowance for credit losses and imputed discount current | 733 | 656 |
| Allowance for credit losses and imputed discount noncurrent | $ 213 | $ 158 |
| Common stock, par value (in USD per share) | $ 0.00001 | $ 0.00001 |
| Common stock, shares authorized (in shares) | 2,000,000,000 | 2,000,000,000 |
| Common stock, shares issued (in shares) | 1,275,774,235 | 1,271,074,364 |
| Common stock, shares outstanding (in shares) | 1,106,930,661 | 1,144,579,681 |
| Treasury stock, at cost (in shares) | 168,843,574 | 126,494,683 |
Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Income Statement [Abstract] | |||
| Cash flow hedges, tax effect | $ 65 | $ 60 | $ 56 |
| Fair value hedges, tax effect | (64) | 5 | 0 |
| Unrealized loss on foreign currency translation adjustment, tax | 0 | 0 | 0 |
| Pension and other postretirement benefit, tax | $ 2 | $ (29) | $ (31) |
Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Statement of Cash Flows [Abstract] | |||
| Capitalized interest | $ (43) | $ (34) | $ (104) |
Consolidated Statement of Stockholders’ Equity (Parenthetical) - $ / shares |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Statement of Stockholders' Equity [Abstract] | |||
| Common stock, dividends declared (in USD per share) | $ 3.80 | $ 3.71 | $ 0.65 |
Summary of Significant Accounting Policies |
12 Months Ended |
|---|---|
Dec. 31, 2025 | |
| Organization, Consolidation and Presentation of Financial Statements [Abstract] | |
| Summary of Significant Accounting Policies | Note 1 – Summary of Significant Accounting Policies Description of Business T-Mobile US, Inc. (“T-Mobile,” “we,” “our,” “us” or the “Company”), together with its consolidated subsidiaries, is a leading provider of wireless communications and broadband services, including voice, messaging and data, under its flagship brands, T-Mobile, Metro™ by T-Mobile (“Metro by T-Mobile”) and Mint Mobile, in the United States, Puerto Rico and the U.S. Virgin Islands. Substantially all of our revenues were earned in, and substantially all of our long-lived assets are located in, the U.S., Puerto Rico and the U.S. Virgin Islands. We provide wireless communications and broadband services primarily using our 5G technology network. We also offer a wide selection of wireless devices, including handsets, tablets and other mobile communication devices, and accessories for sale, as well as financing through equipment installment plans (“EIP”). We provide reinsurance for device insurance policies and extended warranty contracts offered to our wireless communications customers. Basis of Presentation The accompanying consolidated financial statements include the balances and results of operations of T-Mobile and our consolidated subsidiaries. We consolidate majority-owned subsidiaries over which we exercise control, as well as variable interest entities (“VIEs”) for which we are deemed to be the primary beneficiary and VIEs, which cannot be deconsolidated, such as those related to our Tower obligations as discussed in Note 10 – Tower Obligations. Intercompany transactions and balances have been eliminated in consolidation. Investments in entities that we do not control but have significant influence are accounted for under the equity method. We record our proportionate share of our equity method investees’ earnings (losses) within Other (expense) income, net on our Consolidated Statements of Comprehensive Income. We operate as a single operating segment. The preparation of financial statements in conformity with U.S. generally accepted accounting principles (“GAAP”) requires our management to make estimates and assumptions which affect our consolidated financial statements and accompanying notes. Estimates are based on historical experience, where applicable, and other assumptions which our management believes are reasonable under the circumstances. These estimates are inherently subject to judgment and actual results could differ from those estimates. Cash and Cash Equivalents Cash equivalents consist of highly liquid money market funds and U.S. Treasury securities with remaining maturities of three months or less at the date of purchase. Receivables and Related Allowance for Credit Losses Accounts Receivable Accounts receivable balances are predominantly comprised of amounts currently due from customers (e.g., for wireless communications services), device insurance administrators, wholesale partners, other carriers and third-party retail channels. Accounts receivable are presented on our Consolidated Balance Sheets at their amortized cost basis (i.e., the receivables’ unpaid principal balance (“UPB”) as adjusted for any written-off amounts relating to impairment), net of the allowance for credit losses. We have an arrangement to sell certain of our customer service accounts receivable on a revolving basis, which are treated as sales of financial assets. See Note 5 – Sales of Certain Receivables for further information. Equipment Installment Plan Receivables We offer certain customers the option to pay for their devices and other purchases in installments, generally over a period of 24 months, using an EIP. Installment loans acquired in the UScellular Acquisition (as defined below) are included in EIP receivables and generally have an initial term of 36 months. EIP receivables are presented on our Consolidated Balance Sheets at their amortized cost basis (i.e., the receivables’ UPB as adjusted for any written-off amounts due to impairment and unamortized discounts), net of the allowance for credit losses. At the time of an installment sale, we impute a discount for interest if the term exceeds 12 months as there is no stated rate of interest on the receivables. The receivables are recorded at their present value, which is determined by discounting expected future cash payments at the imputed interest rate. This adjustment results in a discount or reduction in the transaction price of the contract with a customer, which is allocated to the performance obligations of the arrangement such as Service and Equipment revenues on our Consolidated Statements of Comprehensive Income. The imputed discount rate reflects a current market interest rate and includes a component for estimated credit risk underlying the EIP receivable, reflecting the estimated credit worthiness of the customer. The imputed discount on receivables is amortized over the financed installment term using the effective interest method and recognized as Other revenues on our Consolidated Statements of Comprehensive Income. The current portion of the EIP receivables is included in Equipment installment plan receivables, net and the long-term portion of the EIP receivables is included in Equipment installment plan receivables due after one year, net on our Consolidated Balance Sheets. We have an arrangement to sell certain EIP receivables on a revolving basis, which are treated as sales of financial assets. See Note 5 – Sales of Certain Receivables for further information. Additionally, certain of our EIP receivables included on our Consolidated Balance Sheets secure our asset-backed notes (“ABS Notes”). See Note 9 – Debt for further information. Allowance for Credit Losses We maintain an allowance for credit losses by applying an expected credit loss model. Each period, management assesses the appropriateness of the level of allowance for credit losses by considering credit risk inherent within each portfolio segment (i.e., accounts receivable and EIP receivable portfolio segments) as of period end. Each portfolio segment is comprised of pools of receivables that are evaluated collectively based on similar risk characteristics. Our allowance levels consider estimated credit risk over the contractual life of the receivables and are influenced by receivable volumes, receivable delinquency status, historical loss experience and other conditions that affect loss expectations, such as changes in credit and collections policies and forecasts of macroeconomic conditions. While we attribute portions of the allowance to our respective portfolio segments, the entire allowance is available to credit losses related to the total receivable portfolio. We consider a receivable past due and delinquent when a customer has not paid us by the contractually specified payment due date. Account balances are written off against the allowance for credit losses if collection efforts are unsuccessful and the receivable balance is deemed uncollectible (customer default), based on factors such as customer credit ratings as well as the length of time the amounts are past due. If there is a deterioration of our customers’ financial condition or if future actual default rates on receivables in general differ from those currently anticipated, we will adjust our allowance for credit losses accordingly. Inventories Inventories consist primarily of wireless devices and accessories, which are valued at the lower of cost or net realizable value. Cost is determined using standard cost, which approximates average cost. Shipping and handling costs paid to wireless device and accessories vendors as well as costs to refurbish used devices are included in the standard cost of inventory. Net realizable value is the estimated selling price in the ordinary course of business, less reasonably predictable costs of disposal and transportation. We record inventory write-downs to net realizable value for obsolete and slow-moving items based on inventory turnover trends and historical experience. Recourse Guarantee Liabilities and Deferred Purchase Price Assets In connection with the sales of certain service and EIP accounts receivable pursuant to the sale arrangements, we have recourse guarantee liabilities, beginning on November 1, 2024, and deferred purchase price assets, prior to November 1, 2024, measured at fair value that are based on a discounted cash flow model using unobservable Level 3 inputs, including estimated customer default rates and credit worthiness. See Note 5 – Sales of Certain Receivables for further information. Long-Lived Assets Long-lived assets include assets that do not have indefinite lives, such as property and equipment and certain intangible assets. Property and Equipment Property and equipment consists of buildings and equipment, including certain network server equipment, wireless communications systems, leasehold improvements, capitalized software, leased wireless devices and construction in progress. Wireless communications systems include assets to operate our wireless network and information technology data centers, including tower assets, leasehold improvements and asset retirement costs. Leasehold improvements include asset improvements other than those related to the wireless network. Property and equipment are recorded at cost less accumulated depreciation and impairments, if any, in Property and equipment, net on our Consolidated Balance Sheets. We generally depreciate property and equipment over the period the property and equipment provide economic benefit using the straight-line method. Depreciable life studies are performed periodically to confirm the appropriateness of depreciable lives for certain categories of property and equipment. These studies take into account actual usage, physical wear and tear, replacement history and assumptions about technology evolution. When these factors indicate the useful life of an asset is different from the previous assessment, the remaining book value is depreciated prospectively over the adjusted remaining estimated useful life. Leasehold improvements are depreciated over the shorter of their estimated useful lives or the related lease term. Costs of major replacements and improvements are capitalized. Repair and maintenance expenditures which do not enhance or extend the asset’s useful life are charged to operating expenses as incurred. Construction costs, labor and overhead incurred in the expansion or enhancement of our wireless network are capitalized. Capitalization commences with pre-construction period administrative and technical activities, which include obtaining zoning approvals and building permits, and ceases at the point at which the asset is ready for its intended use. We capitalize interest associated with the acquisition or construction of certain property and equipment. Capitalized interest is reported as a reduction in interest expense and depreciated over the useful life of the related asset. We record an asset retirement obligation for the estimated fair value of legal obligations associated with the retirement of tangible long-lived assets and a corresponding increase in the carrying amount of the related asset in the period in which the obligation is incurred. In periods subsequent to initial measurement, we recognize changes in the liability resulting from the passage of time and revisions to either the timing or the amount of the original estimate. Over time, the liability is accreted to its present value and the capitalized cost is depreciated over the estimated useful life of the asset. Our obligations relate primarily to certain legal obligations to remediate leased property on which our network infrastructure and administrative assets are located. We capitalize certain costs incurred in connection with developing or acquiring internal use software. Capitalization of software costs commences once the final selection of the specific software solution has been made and management authorizes and commits to funding the software project and ceases once the project is ready for its intended use. Capitalized software costs are included in Property and equipment, net on our Consolidated Balance Sheets and are amortized on a straight-line basis over the estimated useful life of the asset. Costs incurred during the preliminary project stage, as well as maintenance and training costs, are expensed as incurred. Other Intangible Assets Intangible assets that do not have indefinite useful lives are amortized over their estimated useful lives. Customer relationships are amortized using the sum-of-the-years digits method. The remaining finite-lived intangible assets are amortized using the straight-line method. See Note 7 - Goodwill, Spectrum License Transactions and Other Intangible Assets for further information. Impairment We assess potential impairments to our long-lived assets when events or changes in circumstances indicate the carrying amount of the asset may not be recoverable. If any indicators of impairment are present, we test recoverability. The carrying value of a long-lived asset or asset group is not recoverable if the carrying value exceeds the sum of the estimated undiscounted future cash flows expected to be generated from the use and eventual disposition of the asset or asset group. If the estimated undiscounted future cash flows do not exceed the asset or asset group’s carrying amount, then an impairment loss is recorded, measured as the amount by which the carrying amount of a long-lived asset or asset group exceeds its estimated fair value. Business Combinations Assets acquired and liabilities assumed as part of a business combination are generally recorded at their fair value at the date of acquisition. The excess of purchase price over the fair value of assets acquired and liabilities assumed is recorded as goodwill. Determining fair value of identifiable assets, particularly intangibles, and liabilities acquired requires management to make estimates, which are based on all available information and in some cases assumptions with respect to the timing and amount of future revenues and expenses associated with an asset or liability. See Note 2 – Business Combinations for further discussion of our acquisitions. Goodwill and Indefinite-Lived Intangible Assets Goodwill Goodwill consists of the excess of the purchase price over the fair value of identifiable net assets acquired in a business combination and is assigned at the reporting unit level. We identify our reporting units at the level of our Wireless operating segment or one level below. Spectrum Licenses Spectrum licenses are carried at costs incurred to acquire the spectrum licenses and the costs to prepare the spectrum licenses for their intended use, such as costs to clear acquired spectrum licenses. The FCC issues spectrum licenses which provide us with the exclusive right to utilize designated radio frequency spectrum within specific geographic service areas to provide wireless communications services. Spectrum licenses are issued for a fixed period of time, typically up to 15 years; however, the FCC has granted license renewals routinely and at a nominal cost. The spectrum licenses acquired expire at various dates and we believe we will be able to meet all requirements necessary to secure renewal of our spectrum licenses at a nominal cost. Moreover, we determined that there are currently no legal, regulatory, contractual, competitive, economic or other factors that limit the useful lives of our spectrum licenses. The utility of radio frequency spectrum does not diminish while activated on our network nor does it otherwise deteriorate over time. Therefore, we determined the spectrum licenses should be treated as indefinite-lived intangible assets. At times, we enter into agreements to sell or exchange spectrum licenses. Upon entering into a sale or exchange arrangement, if the transaction has been deemed to have commercial substance and the spectrum licenses meet the held for sale criteria, the licenses are classified as held for sale at their carrying value, as adjusted for any impairment recognized, included in Other current assets or Other assets on our Consolidated Balance Sheets until approval and completion of the sale or an exchange. Upon closing of the transaction, spectrum licenses acquired as part of an exchange of nonmonetary assets are recorded at fair value and the difference between the fair value of the spectrum licenses obtained, carrying value of the spectrum licenses transferred and cash paid, if any, is recognized as a gain or loss on disposal of spectrum licenses included in Selling, general and administrative expenses on our Consolidated Statements of Comprehensive Income. Our fair value estimates of spectrum licenses are based on information for which there is little or no observable market data. If the transaction lacks commercial substance or the fair value is not measurable, the acquired spectrum licenses are recorded at our carrying value of the spectrum assets transferred or exchanged. We have lease agreements (the “Agreements”) with various educational and non-profit institutions that provide us with the right to use Federal Communications Commission (“FCC”) spectrum licenses (known as “Educational Broadband Services” or “EBS” spectrum) in the 2.5 GHz band. The Agreements are typically for terms of to 10 years with automatic renewal provisions, bringing the total term of the Agreements up to 30 years. A majority of the Agreements include a right of first refusal to acquire, lease or otherwise use the license at the end of the automatic renewal periods. Leased FCC spectrum licenses are recorded as executory contracts, and contractual lease payments are recognized on a straight-line basis over the remaining term of the arrangement, including renewals, and are presented in Cost of services on our Consolidated Statements of Comprehensive Income. The spectrum licenses we hold plus the spectrum leases enhance the overall value of our spectrum licenses as the collective value is higher than the value of individual bands of spectrum within a specific geography. This value is derived from the ability to provide wireless service to customers across large geographic areas and maintain the same or similar wireless connectivity quality. This enhanced value from combining owned and leased spectrum licenses is referred to as an aggregation premium. The aggregation premium is a component of the overall fair value of our owned FCC spectrum licenses. Impairment We assess the carrying value of our goodwill and other indefinite-lived intangible assets, such as our spectrum license portfolio, for potential impairment annually as of December 31 or more frequently, if events or changes in circumstances indicate such assets might be impaired. We test goodwill on a reporting unit basis by comparing the estimated fair value of the reporting unit to its book value. If the fair value of the reporting unit exceeds the book value, then no impairment is measured. When assessing goodwill for impairment we may elect to first perform a qualitative assessment to determine if the quantitative impairment test is necessary. If we do not perform a qualitative assessment, or if the qualitative assessment indicates it is more likely than not that the fair value of a reporting unit is less than its carrying amount, we perform a quantitative test. We recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value; however, the loss recognized would not exceed the total amount of goodwill allocated to that reporting unit. We employ a qualitative approach to assess our reporting units. The fair value of each reporting unit is determined using both a market approach and an income approach. We utilize market capitalization, discounted cash flow model and a market multiples approach to estimate the fair value of our reporting units. We recognize that the market capitalization of T-Mobile and the trading multiples of the comparable public companies are subject to volatility and will monitor changes in market capitalization and the trading multiples of the comparable public companies to determine whether declines, if any, necessitate an interim impairment review. In the event market capitalization or the indicated value from market multiples of comparable public companies indicate a decline in fair value below the carrying value of each reporting unit, we will consider the length, severity and reasons for the decline when assessing whether potential impairment exists, including considering whether a control premium should be added to the market capitalization. We believe short-term fluctuations in share price may not necessarily reflect the underlying aggregate fair value. No events or changes in circumstances have occurred that indicate the fair value of our reporting units may be below their carrying amount at December 31, 2025. We test our spectrum licenses for impairment on an aggregate basis, consistent with our management of the overall business at a national level. We may elect to first perform a qualitative assessment to determine whether it is more likely than not that the fair value of an intangible asset is less than its carrying value. If we do not perform the qualitative assessment, or if the qualitative assessment indicates it is more likely than not that the fair value of the intangible asset is less than its carrying amount, we calculate the estimated fair value of the intangible asset. If the estimated fair value of the spectrum licenses is lower than their carrying amount, an impairment loss is recognized for the difference. We employ the qualitative method. We estimate fair value of spectrum licenses using the Greenfield methodology and comparable market transactions. The Greenfield methodology values the spectrum licenses by calculating the cash flow generating potential of a hypothetical start-up company that goes into business with no assets except for the asset to be valued (in this case, spectrum licenses) and makes investments required to build an operation comparable to current use. The value of the spectrum licenses is the present value of the cash flows of this hypothetical start-up company. We base the assumptions underlying the Greenfield methodology on a combination of market participant data and our historical results, trends and business plans. Future cash flows in the Greenfield methodology are based on estimates and assumptions of market participant revenues, EBITDA margin, network build-out period and a long-term growth rate for a market participant. The cash flows are discounted using a weighted-average cost of capital. Where market data is available, we also incorporate indicated spectrum license values using a market multiple approach. No events or change in circumstances have occurred that indicate the fair value of the Spectrum licenses may be below their carrying amount at December 31, 2025. The valuation approaches utilized to estimate fair value for the purposes of the impairment tests of goodwill and spectrum licenses may require that management make difficult, subjective and complex judgments about matters that are inherently uncertain. If actual results or future expectations are not consistent with the assumptions used in our estimate of fair value, it may result in the recording of significant impairment charges on goodwill or spectrum licenses. The most significant assumptions within the valuation models are the discount rate based on the weighted-average cost of capital, revenues, EBITDA margins, capital expenditures and long-term growth rate. For more information regarding our impairment assessments of indefinite-lived intangible assets, see Note 7 – Goodwill, Spectrum License Transactions and Other Intangible Assets. Equity Method Investments Investments in entities that we do not control but have significant influence are accounted for under the equity method. We record our proportionate share of our equity method investees’ earnings (losses) within Other (expense) income, net on our Consolidated Statements of Comprehensive Income. Impairment For our equity method investments, we perform a qualitative assessment for impairment quarterly or whenever significant events or changes in circumstances indicate that the carrying amount of the investment might not be recoverable. We consider whether impairment indicators exist by evaluating the companies' financial and liquidity position and access to capital resources, among other indicators. If a qualitative assessment indicates that the investment may be impaired, we prepare a quantitative assessment of the fair value of the investment using a market approach or an income approach. In the event the estimated fair value of an investment declines below the carrying value and we determine the decline in fair value is other than temporary, an impairment charge is recorded, measured as the amount by which the carrying amount of the investment exceeds its estimated fair value. Fair Value Measurements We carry certain assets and liabilities at fair value. Fair value is defined as an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The three-tier hierarchy for inputs used in measuring fair value, which prioritizes the inputs based on the observability as of the measurement date, is as follows: Level 1 Quoted prices in active markets for identical assets or liabilities; Level 2 Observable inputs other than the quoted prices in active markets for identical assets and liabilities; and Level 3 Unobservable inputs for which there is little or no market data, which require us to develop assumptions of what market participants would use in pricing the asset or liability. Assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement. Our assessment of the significance of a particular input to the fair value measurement requires judgment and may affect the placement of assets and liabilities being measured within the fair value hierarchy. The carrying values of Cash and cash equivalents, Accounts receivable and Accounts payable and accrued liabilities approximate fair value due to the short-term maturities of these instruments. The carrying values of EIP receivables approximate fair value as the receivables are generally recorded at their present value using an imputed interest rate. With the exception of certain long-term fixed-rate debt, there were no financial instruments with a carrying value materially different from their fair value. See Note 8 – Fair Value Measurements for a comparison of the carrying values and fair values of our short-term and long-term debt. Foreign Currency Transactions As of December 31, 2025, we held €4.8 billion of euro (“EUR”) denominated debt, which is subject to foreign currency exchange rate fluctuations. T-Mobile’s functional currency is the U.S. dollar (“USD”). Each period, we convert activity and balances in EUR into USD using average exchange rates for the period for income statement amounts and using end-of-period or spot exchange rates for assets and liabilities. We record transaction gains and losses resulting from the conversion of transaction currency to functional currency as a component of Other (expense) income, net on our Consolidated Statements of Comprehensive Income. Derivative and Hedging Instruments The Company manages its exposure to foreign exchange rates and interest rates through a risk management program that includes the use of derivative financial instruments, including cross-currency swaps. We designate certain derivatives as accounting hedge relationships. We do not hold derivatives for trading or speculative purposes. We record derivatives on our Consolidated Balance Sheets and recognize them as either assets or liabilities at fair value. Fair value is derived primarily from observable market data, and our derivatives are classified as Level 2 in the fair value hierarchy. Cash flows associated with qualifying hedge derivative instruments are presented in the same category on our Consolidated Statements of Cash Flows as the item being hedged. For fair value hedges, other than foreign currency hedges, the change in the fair value of the derivative instruments is recognized in earnings through the same income statement line item as the change in the fair value of the hedged item. For cash flow hedges, as well as fair value foreign currency hedges, the change in the fair value of the derivative instruments is reported in Accumulated other comprehensive loss and recognized in earnings when the hedged item is recognized in earnings, again, through the same income statement line item. Revenue Recognition We primarily generate our revenue from providing wireless communications services and selling devices and accessories to customers. Our contracts with customers may involve more than one performance obligation, which include wireless services, wireless devices or a combination thereof, and we allocate the transaction price between each performance obligation based on its relative standalone selling price. Wireless Communications Services Revenue We generate our wireless communications services revenues from providing access to, and usage of, our wireless communications network. Service revenues also include revenues earned for providing premium services to customers, such as device insurance services. Generally, service contracts are billed monthly in advance of services being transferred or are prepaid. Service revenue is recognized as we satisfy our performance obligation to transfer service to our customers. We typically satisfy our stand-ready performance obligations, including unlimited wireless services, evenly over the contract term as services are transferred to our customers. The enforceable duration of our postpaid service contracts with customers is typically one month. However, promotional EIP bill credits offered to a customer on an equipment sale that are paid over time and are contingent on the customer maintaining a service contract may result in an extended service contract based on whether a substantive penalty is deemed to exist. Revenue is recorded net of costs paid to a third party for performance obligations where we facilitate an arrangement for the other party to transfer goods or services to our customer (i.e., when we are acting as an agent). For example, performance obligations relating to services provided by third-party content providers where we neither control a right to the content provider’s service nor control the underlying service itself are presented net. Consideration payable to a customer is treated as a reduction of the total transaction price, unless the payment is in exchange for a distinct good or service, such as certain commissions paid to dealers, in which case the payment is treated as a purchase of that distinct good or service. Federal Universal Service Fund (“USF”) and state USF fees are assessed to T-Mobile by various governmental authorities in connection with the services we provide to our customers and are included in Cost of services. When we separately bill and collect these regulatory fees from customers, they are recorded gross in Total service revenues on our Consolidated Statements of Comprehensive Income. For the years ended December 31, 2025, 2024 and 2023, we recorded approximately $400 million, $386 million and $317 million, respectively, of USF fees on a gross basis. We have made an accounting policy election to exclude from the measurement of the transaction price all taxes assessed to the customer by a governmental authority that are both imposed on and concurrent with a specific revenue-producing transaction and collected by us from a customer on behalf of the taxing agency (e.g., sales, use, value added, and some excise taxes). Equipment Revenues We generate equipment revenues from the sale of mobile communication devices and accessories. Equipment revenues related to device and accessory sales are typically recognized at a point in time when control of the device or accessory is transferred to the customer or dealer. We have elected to account for shipping and handling activities that occur after control of the related good transfers as fulfillment activities, as opposed to performance obligations. We estimate variable consideration (e.g., device returns or certain payments to indirect dealers) primarily based on historical experience. Equipment sales for which we determine it is not probable that we will collect substantially all of the transaction price are generally recorded as payments are received. Our assessment of collectibility considers contract terms such as down payments that reduce our exposure to credit risk. We offer certain customers the option to pay for devices and accessories in installments using an EIP. This financing option is provided at a stated interest of zero and is typically over a 24-month period. We recognize as a reduction of the total transaction price the effects of a financing component in contracts via the imputation of interest when customers purchase their devices and accessories on an EIP, including those financing components that are not considered to be significant to the contract. However, we have elected the practical expedient of not recognizing the effects of a significant financing component for contracts where we expect, at contract inception, that the period between the transfer of a performance obligation to a customer and the customer’s payment for that performance obligation will be one year or less. Imputed Interest on EIP Receivables For EIP with a duration greater than one year, we record the effects of financing via the imputation of interest. This is performed on all such EIP receivables regardless as to whether or not the financing is considered to be significant. The imputation of interest results in a discount of the EIP receivable, thereby adjusting the transaction price of the contract with the customer, which is then allocated to the performance obligations of the arrangement. Judgment is required to determine the imputed interest rate. For EIP sales, the imputed rate used to adjust the transaction price reflects current market interest rates, including the estimated credit risk of the underlying customers. Customer credit behavior is inherently uncertain. See “Receivables and Related Allowance for Credit Losses” above, for additional discussion on how we assess credit risk. Contract Balances Generally, our devices and service plans are available at standard prices, which are maintained on price lists and published on our website and/or within our retail stores. For contracts that involve more than one product or service that are identified as separate performance obligations, the transaction price is allocated to the performance obligations based on their relative standalone selling prices. The standalone selling price is the price at which we would sell the good or service separately, on a standalone basis, to similar customers in similar circumstances. A contract asset is recorded when revenue is recognized in advance of our right to receive consideration (i.e., we must perform additional services in order to receive consideration). Amounts are recorded as receivables when our right to consideration is unconditional. When consideration is received, or we have an unconditional right to consideration in advance of delivery of goods or services, a contract liability is recorded. The transaction price can include non-refundable upfront fees, which are allocated to the identifiable performance obligations. Contract assets are included in Other current assets and Other assets and contract liabilities are included in Deferred revenue on our Consolidated Balance Sheets. See Note 11 – Revenue from Contracts with Customers for further information. Contract Modifications Our service contracts allow customers to frequently modify their contracts without incurring penalties, in many cases. For contract modifications, we evaluate the change in scope or price of the contract to determine if the modification should be treated as a separate contract, as if there is a termination of the existing contract and creation of a new contract, or if the modification should be considered a change associated with the existing contract. We typically do not have significant impacts from contract modifications. Contract Costs We incur certain incremental costs to obtain a contract that we expect to recover, such as sales commissions. We record an asset when these incremental costs to obtain a contract are incurred and amortize them on a systematic basis that is consistent with the transfer to the customer of the goods or services to which the asset relates. We capitalize postpaid sales commissions for service activation as costs to acquire a contract and amortize them on a straight-line basis over the estimated period of benefit, currently 24 months. For capitalized contract costs, determining the amortization period over which such costs are recognized as well as assessing the indicators of impairment requires judgment. Prepaid commissions are expensed as incurred as their estimated period of benefit does not extend beyond 12 months. Commissions paid upon device upgrade are not capitalized if the remaining customer contract is less than one year. Incremental costs to obtain equipment contracts (e.g., commissions paid on device and accessory sales) are recognized when the equipment is transferred to the customer. See Note 11 – Revenue from Contracts with Customers for further information. Leases Cell Site, Retail Store and Office Facility Leases We are a lessee for non-cancelable operating and financing leases for cell sites, switch sites, retail stores, network equipment and office facilities. We recognize a right-of-use asset and lease liability for operating leases based on the net present value of future minimum lease payments. The right-of-use asset for an operating lease is based on the lease liability. Lease expense is recognized on a straight-line basis over the non-cancelable lease term and renewal periods that are considered reasonably certain. In addition, we have financing leases for certain network equipment. We recognize a right-of-use asset and lease liability for financing leases based on the net present value of future minimum lease payments. The right-of-use asset for a finance lease is based on the lease liability. Expense for our financing leases is comprised of the amortization expense associated with the right-of-use asset and interest expense recognized based on the effective interest method. We include options to extend or terminate a lease when we are reasonably certain that we will exercise that option. We consider several factors in assessing whether renewal periods are reasonably certain of being exercised, including the continued maturation of our nationwide network, technological advances within the telecommunications industry and the availability of alternative sites. We have generally concluded we are not reasonably certain to exercise the options to extend or terminate our leases. Therefore, as of the lease commencement date, our lease terms generally do not include these options. In determining the discount rate used to measure the right-of-use asset and lease liability, we use rates implicit in the lease, or if not readily available, we use our incremental borrowing rate. Our incremental borrowing rate is based on an estimated secured rate comprised of a risk-free rate plus a credit spread as secured by our assets. Determining a credit spread as secured by our assets may require judgment. Certain of our lease agreements include rental payments based on changes in the consumer price index (“CPI”). Lease liabilities are not remeasured as a result of changes in the CPI; instead, changes in the CPI are treated as variable lease payments and are excluded from the measurement of the right-of-use asset and lease liability. These payments are recognized in the period in which the related obligation is incurred. Our lease agreements do not contain any material residual value guarantees or material restrictive covenants. Generally, we elected the practical expedient to not separate lease and non-lease components in arrangements. We did not elect the short-term lease recognition exemption; as such, leases with terms shorter than 12 months are included as a right-of-use asset and lease liability. Rental revenues and expenses associated with co-location tower sites are presented on a net basis under Topic 842. See Note 17 – Leases for further information. Cell Tower Monetization Transactions In 2012, we entered into a prepaid master lease arrangement in which we as the lessor provided the rights to utilize tower sites and we leased back space on certain of those towers. Prior to our merger (the “Sprint Merger”) with Sprint Corporation (“Sprint”), Sprint entered into a similar lease-out and leaseback arrangement that we assumed in the Sprint Merger. These arrangements are treated as failed sale leasebacks in which the proceeds received are reported as a financing obligation. The principal payments on the tower obligations are included in Other, net within Net cash used in financing activities on our Consolidated Statements of Cash Flows. Our historical tower site asset costs are reported in Property and equipment, net on our Consolidated Balance Sheets and are depreciated. See Note 10 – Tower Obligations for further information. Sprint Retirement Pension Plan We provide the Sprint Retirement Pension Plan (the “Pension Plan”), which is a defined benefit pension plan providing postretirement benefits to certain employees. As of December 31, 2005, the Pension Plan was amended to freeze benefit plan accruals for participants. The investments in the Pension Plan are measured at fair value on a recurring basis each quarter using quoted market prices or the net asset value per share as a practical expedient. The projected benefit obligations associated with the Pension Plan are determined based on actuarial models utilizing mortality tables and discount rates applied to the expected benefit term. See Note 13 – Employee Compensation and Benefit Plans for further information on the Pension Plan. Advertising Expense We expense the cost of advertising and other promotional expenditures to market our services and products as incurred. For the years ended December 31, 2025, 2024 and 2023, advertising expenses included in Selling, general and administrative expenses on our Consolidated Statements of Comprehensive Income were $3.7 billion, $3.1 billion and $2.5 billion, respectively. Income Taxes Deferred tax assets and liabilities are recognized based on temporary differences between the consolidated financial statements and tax bases of assets and liabilities using enacted tax rates expected to be in effect when these differences are realized. A valuation allowance is recorded when it is more likely than not that some portion or all of a deferred tax asset will not be realized. The ultimate realization of a deferred tax asset depends on the ability to generate sufficient taxable income of the appropriate character and in the appropriate taxing jurisdictions within the carryforward periods available. We account for uncertainty in income taxes recognized on our consolidated financial statements in accordance with the accounting guidance for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. We assess whether it is more likely than not that a tax position will be sustained upon examination based on the technical merits of the position and adjust the unrecognized tax benefits in light of changes in facts and circumstances, such as changes in tax law, interactions with taxing authorities and developments in case law. Other Comprehensive Income Other comprehensive income primarily consists of adjustments, net of tax, related to reclassification of loss from cash flow hedges, fair value hedges, foreign currency translation, pension and other postretirement benefits. This is reported in Accumulated other comprehensive loss as a separate component of stockholders’ equity until realized in earnings. Stock-Based Compensation Stock-based compensation expense for stock awards, which include restricted stock units (“RSUs”) and performance-based restricted stock units (“PRSUs”), is measured at fair value on the grant date and recognized as expense, net of expected forfeitures, over the related service period. The fair value of stock awards is based on the closing price of our common stock on the date of grant, adjusted for expected dividend yield. RSUs are recognized as expense using the straight-line method. PRSUs are recognized as expense following a graded vesting schedule with their performance reassessed and updated on a quarterly basis, or more frequently as changes in facts and circumstances warrant. Stockholder Return Programs On September 8, 2022, our Board of Directors authorized a stock repurchase program for up to $14.0 billion of our common stock through September 30, 2023 (the “2022 Stock Repurchase Program”). On September 6, 2023, our Board of Directors authorized a stockholder return program of up to $19.0 billion through December 31, 2024 (the “2023-2024 Stockholder Return Program”). The 2023-2024 Stockholder Return Program consisted of additional repurchases of shares of our common stock and the payment of cash dividends. On December 13, 2024, we announced that our Board of Directors authorized our 2025 Stockholder Return Program of up to $14.0 billion through December 31, 2025 (the “2025 Stockholder Return Program”). The 2025 Stockholder Return Program consisted of additional repurchases of shares of our common stock and the payment of cash dividends. On December 11, 2025, we announced that our Board of Directors authorized our 2026 Stockholder Return Program of up to $14.6 billion that will run through December 31, 2026 (the “2026 Stockholder Return Program”). The 2026 Stockholder Return Program is expected to consist of additional repurchases of shares of our common stock and the payment of cash dividends. The amount available under the 2026 Stockholder Return Program for share repurchases will be reduced by the amount of any cash dividends declared and paid by us. The cost of repurchased shares, including equity reacquisition costs and related taxes, is included in Treasury stock on our Consolidated Balance Sheets. We accrue the cost of repurchased shares and exclude such shares from the calculation of basic and diluted earnings per share, as of the trade date. We recognize a liability for share repurchases which have not settled and for which cash has not been paid in Other current liabilities on our Consolidated Balance Sheets. Cash payments to reacquire our shares, including equity reacquisition costs and related taxes, are included in Repurchases of common stock on our Consolidated Statements of Cash Flows. Dividends declared are included as a reduction to Retained earnings on our Consolidated Balance Sheets. We recognize a liability for dividends declared but for which cash has not been paid in Other current liabilities on our Consolidated Balance Sheets. Dividend cash payments to stockholders are included in Net cash used in financing activities on our Consolidated Statements of Cash Flows. Earnings Per Share Basic earnings per share is computed by dividing Net income attributable to common stockholders by the weighted-average number of common shares outstanding for the period. Diluted earnings per share is computed by giving effect to all potentially dilutive common shares outstanding during the period. Potentially dilutive common shares consist of outstanding stock options, RSUs and PRSUs, calculated using the treasury stock method. See Note 16 – Earnings Per Share for further information. Variable Interest Entities VIEs are entities that lack sufficient equity to permit the entity to finance its activities without additional subordinated financial support from other parties, have equity investors that do not have the ability to make significant decisions relating to the entity's operations through voting rights, do not have the obligation to absorb the expected losses or do not have the right to receive the residual returns of the entity. The most common type of VIE is a special purpose entity (“SPE”). SPEs are commonly used in securitization transactions in order to isolate certain assets and distribute the cash flows from those assets to investors. SPEs are generally structured to insulate investors from claims on the SPEs’ assets by creditors of other entities, including the creditors of the seller of the assets, these SPEs are commonly referred to as being bankruptcy remote. The primary beneficiary is required to consolidate the assets and liabilities of a VIE. The primary beneficiary is the party which has both the power to direct the activities of an entity that most significantly impact the VIE's economic performance, and through its interests in the VIE, the obligation to absorb losses or the right to receive benefits from the VIE which could potentially be significant to the VIE. In assessing which party is the primary beneficiary, all the facts and circumstances are considered, including each party’s role in establishing the VIE and its ongoing rights and responsibilities. This assessment includes, first, identifying the activities that most significantly impact the VIE’s economic performance; and second, identifying which party, if any, has power over those activities. In general, the parties that make the most significant decisions affecting the VIE (such as asset managers and servicers) or have the right to unilaterally remove those decision-makers are deemed to have the power to direct the activities of a VIE. We consolidate VIEs when we are deemed to be the primary beneficiary or when the VIE cannot be deconsolidated. See Note 5 – Sales of Certain Receivables, Note 9 – Debt and Note 10 – Tower Obligations for further information. Accounting Pronouncements Adopted During the Current Year Income Tax Disclosures In December 2023, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2023-09, “Income Taxes (Topic 740): Improvements to Income Tax Disclosures.” The standard enhances income tax disclosure requirements for all entities by requiring specified categories and greater disaggregation within the rate reconciliation table, disclosure of income taxes paid by jurisdiction, and providing clarification on uncertain tax positions and related financial statement impacts. We adopted the standard for our fiscal year 2025 annual financial statements. The guidance was applied retrospectively, and the required disclosures have been included in the Notes to the Consolidated Financial Statements. See Note 14 – Income Taxes for further information. Credit Losses: Purchased Loans In November 2025, the FASB issued ASU 2025-08, “Financial instruments – Credit Losses (Topic 326): Purchased Loans,” which amends the guidance in ASC 326 on the accounting for certain purchased loans. Under the ASU, entities must account for acquired loans, excluding credit card, that meet certain criteria at acquisition (purchased seasoned loans) by recognizing them at their purchase price plus an allowance for expected credit losses. Purchased seasoned loans are defined as either: (1) non-purchased credit deteriorated loans that are obtained in a business combination, or (2) non-purchased credit deteriorated loans that (a) are obtained in an asset acquisition or upon consolidation of a variable interest entity that is not a business and (b) are acquired more than 90 days after their origination date by a transferee that was not involved in their origination. We adopted the standard for our fiscal year 2025 annual financial statements. This guidance was applied retrospectively, and the adoption of the standard did not have a material impact on our Consolidated Financial Statements. Accounting Pronouncements Not Yet Adopted Disaggregation of Income Statement Expenses In November 2024, the FASB issued ASU 2024-03, “Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses.” The standard requires that public business entities disclose additional information about specific expense categories in the notes to financial statements for interim and annual reporting periods. The standard will become effective for us for our fiscal year 2027 annual financial statements and interim financial statements thereafter and may be applied prospectively to periods after the adoption date or retrospectively for all prior periods presented in the financial statements, with early adoption permitted. We plan to adopt the standard when it becomes effective for us beginning in our fiscal year 2027 annual financial statements, and we are currently evaluating the impact this guidance will have on the disclosures included in the Notes to the Consolidated Financial Statements. Internal-Use Software Accounting and Disclosures In September 2025, the FASB issued ASU 2025-06, “Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Targeted Improvements to the Accounting for Internal-Use Software.” The amendments remove all references to project stages in ASC 350-40, clarify the threshold entities apply to begin capitalizing costs and address challenges arising from the evolution of software development practices. The new guidance modernizes accounting for software developed using incremental and iterative methods, where the existing model provided limited direction on when capitalization should begin. The ASU also specifies that the disclosures under ASC 360-10, “Property, Plant, and Equipment—Overall,” apply to capitalized software costs accounted for under ASC 350-40, regardless of how those costs are presented in the financial statements. The standard will become effective for our fiscal year 2028 annual financial statements and interim financial statements thereafter and may be applied prospectively to periods after the adoption date, retrospectively for all prior periods presented in the financial statements or using a modified retrospective transition approach with early adoption permitted. We do not expect the adoption to have a material impact on our Consolidated Financial Statements and related disclosures. Interim Reporting In December 2025, the FASB issued ASU 2025-11, “Interim Reporting (Topic 270): Narrow-Scope Improvements.” The standard improves the navigability of interim disclosures, clarifies when Topic 270 applies and provides additional interim disclosure guidance, including a principle to disclose material events since the most recent annual reporting period. The amendments do not change the underlying objectives of interim reporting but are designed to enhance clarity in application. The standard is effective for us beginning January 1, 2028, with early adoption permitted, and may be applied prospectively or retrospectively. We evaluated this standard and concluded our current interim reporting disclosures are consistent with this standard. Accordingly, we do not expect the adoption of this standard to have a material impact on our interim reporting disclosures.
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Business Combinations |
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| Business Combination, Asset Acquisition, Transaction between Entities under Common Control, and Joint Venture Formation [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Business Combinations | Note 2 – Business Combinations Acquisition of Ka’ena Corporation On March 9, 2023, we entered into a merger and unit purchase agreement (the “Merger and Unit Purchase Agreement”) for the acquisition of 100% of the outstanding equity of Ka’ena Corporation and its subsidiaries, including, among others, Mint Mobile LLC (collectively, “Ka’ena”), for a maximum purchase price of $1.35 billion to be paid out 39% in cash and 61% in shares of T-Mobile common stock (the “Ka’ena Acquisition”). On March 13, 2024, we entered into Amendment No. 1 to the Merger and Unit Purchase Agreement, which amended, among other things, certain mechanics of the payment of the purchase consideration for the Ka’ena Acquisition, which resulted in a nominal increase in the percentage of cash compared to shares of T-Mobile common stock to be paid out as part of the total purchase price. Upon the completion of certain customary closing conditions, including the receipt of certain regulatory approvals, on May 1, 2024 (the “Ka’ena Acquisition Date”), we completed the Ka’ena Acquisition, and as a result, Ka’ena became a wholly owned subsidiary of T-Mobile. Concurrently, and as agreed upon through the Merger and Unit Purchase Agreement, T-Mobile and Ka’ena entered into certain separate transactions, including the effective settlement of the preexisting wholesale arrangement between T-Mobile and Ka’ena and agreements with certain of the sellers to provide services to T-Mobile during the post-acquisition period. Ka’ena is a provider of prepaid mobile services in the U.S. through its primary brands, Mint Mobile and Ultra Mobile, and also offers a selection of wireless devices, including handsets and other mobile communication devices. Prior to the Ka’ena Acquisition, Ka’ena was a wholesale partner of the Company for which we recognized service revenues within Wholesale and other service revenues on our Consolidated Statements of Comprehensive Income, and for which Ka’ena incurred related expenses for the use of our network. On the Ka’ena Acquisition Date, this relationship was effectively terminated, and the Company acquired Ka’ena’s prepaid customer relationships and began to recognize service revenues associated with these customers within Prepaid revenues and operating expenses primarily within Selling, general and administrative expenses on our Consolidated Statements of Comprehensive Income subsequent to the Ka’ena Acquisition Date. The Ka’ena Acquisition enhances the Company’s position as a leading prepaid wireless carrier by diversifying our brand identities, enhancing our distribution footprint and preserving the value of our relationship with Ka’ena through its acquisition, including the acquisition of its prepaid customer relationships. The financial results of Ka’ena from the Ka’ena Acquisition Date through December 31, 2024, were not material to our Consolidated Statements of Comprehensive Income, nor were they material to our prior period consolidated results on a pro forma basis. Costs for the Ka’ena Acquisition did not have a material impact on our Consolidated Statements of Comprehensive Income. Consideration Transferred In accordance with the terms of the Merger and Unit Purchase Agreement, the total purchase price is variable, dependent upon specified performance indicators of Ka’ena, and consists of an upfront payment on the Ka’ena Acquisition Date and an earnout payable in the third quarter of 2026. On June 30, 2025, we amended the Merger and Unit Purchase Agreement to set the calculation of the earnout as the difference between the maximum purchase price of $1.35 billion and the upfront payment, as adjusted, and removed the requirement for Ka’ena to achieve specified performance indicators. On the Ka’ena Acquisition Date and in satisfaction of the upfront payment, we transferred $420 million in cash and 3,264,952 shares of T-Mobile common stock valued at $536 million as determined based on its closing market price on April 30, 2024, for a total payment fair value of $956 million. An additional amount of the upfront payment payable to certain sellers was deferred and may be paid through the first quarter of 2026. As of the Ka’ena Acquisition Date, we recognized a liability of $27 million for the fair value of this deferred amount, which is included in the fair value of consideration transferred in the Ka’ena Acquisition. Furthermore, a portion of the upfront payment made on the Ka’ena Acquisition Date was for the settlement of the preexisting wholesale relationship with Ka’ena and excluded from the fair value of consideration transferred in the Ka’ena Acquisition. The amount of the upfront payment was subject to customary adjustments and as a result of such adjustments, $17 million of the upfront payment was returned to T-Mobile during the fourth quarter of 2024, which resulted in a commensurate increase in the maximum amount payable in satisfaction of the earnout. Based on the amount of the adjusted upfront payment, an additional $420 million in future cash and T-Mobile common stock is payable in satisfaction of the earnout. •$251 million of the earnout amount is payment for the acquired Ka’ena business, and we recognized a liability of $191 million for the fair value of such deferred consideration as of the Ka’ena Acquisition Date. This liability was adjusted to fair value at each reporting date through June 30, 2025, with a corresponding offset recorded to Selling, general and administrative expenses on our Consolidated Statements of Comprehensive Income. •$169 million of the earnout amount is payment for services to be provided to T-Mobile by certain of the sellers during the post-acquisition period, as well as the replacement of equity awards of certain Ka’ena employees. We recognize expenses as such services are provided during the post-acquisition period within Selling, general and administrative expenses on our Consolidated Statements of Comprehensive Income, with a corresponding offset to Other current liabilities and Other long-term liabilities on our Consolidated Balance Sheets. The acquisition-date fair value of consideration transferred in the Ka’ena Acquisition is comprised of the following:
The fair value of the deferred earnout consideration was estimated using the income approach, a probability-weighted discounted cash flow model, whereby a Monte Carlo simulation method estimated the probability of different outcomes. This fair value measurement is based on significant inputs not observable in the market and, therefore, represents a Level 3 measurement as defined in ASC 820. The key assumptions in applying the income approach for the deferred earnout consideration include forecasted Ka’ena financial information, primarily revenue, marketing costs and customer metrics, the probability of achieving the forecasted financial information and the discount rate. As of December 31, 2025, $242 million of liabilities for deferred earnout consideration and $157 million of liabilities for post-acquisition services were presented within current liabilities on our Consolidated Balance Sheets, and as of December 31, 2024, $202 million of liabilities for deferred consideration and $80 million of liabilities for post-acquisition services were presented within long-term liabilities on our Consolidated Balance Sheets. Fair Value of Assets Acquired and Liabilities Assumed We accounted for the Ka’ena Acquisition as a business combination. The identifiable assets acquired and liabilities assumed from Ka’ena were recorded at their fair values as of the Ka’ena Acquisition Date and consolidated with those of T-Mobile. Assigning fair values to the assets acquired and liabilities assumed at the Ka’ena Acquisition Date required the use of judgment regarding estimates and assumptions. For the fair values of the assets acquired and liabilities assumed, we used the cost and income approaches. The following table summarizes the assigned fair values for each class of assets acquired and liabilities assumed at the Ka’ena Acquisition Date, as adjusted during the measurement period, which closed on April 30, 2025, based on information identified after the Ka’ena Acquisition Date. We retained the services of certified valuation specialists to assist with assigning values to certain acquired assets.
Intangible Assets Goodwill was assigned to our Wireless segment and has an assigned value of $777 million, which represents the excess of the consideration transferred over the fair values of assets acquired and liabilities assumed. The assigned goodwill recognized includes expected growth in customers and service revenues to be achieved from the operations of the combined company, the assembled workforce of Ka’ena and intangible assets that do not qualify for separate recognition. Of the total amount of assigned goodwill resulting from the Ka’ena Acquisition of $777 million, the amount deductible for tax purposes is $121 million. Other intangible assets acquired primarily include $545 million of customer relationships with an estimated weighted-average useful life of six years, $70 million of tradenames with an estimated weighted-average useful life of eight years and $125 million of other intangible assets with an estimated weighted-average useful life of four years. The customer relationships are being amortized using the sum-of-the-years digits method over their estimated useful lives, and the tradenames are being amortized on a straight-line basis over their estimated useful lives. The fair value of customer relationships was estimated using the income approach. This fair value measurement is based on significant inputs not observable in the market, and, therefore, represents a Level 3 measurement as defined in ASC 820. The key assumptions in applying the income approach include forecasted customer churn rates, revenue over an estimated period of time, the discount rate and estimated income taxes. Acquisition of UScellular Wireless Business On May 24, 2024, we entered into a securities purchase agreement with United States Cellular Corporation (“UScellular”), Telephone and Data Systems, Inc., and USCC Wireless Holdings, LLC for the acquisition of substantially all of UScellular’s wireless operations and select AWS, PCS, 600 MHz, 700 MHz and other spectrum assets for an aggregate purchase price of approximately $4.4 billion, payable in cash and the assumption of up to $2.0 billion of debt through exchange offers to certain UScellular debtholders. On May 23, 2025, we launched exchange offers (the “Exchange Offers”) for any and all of certain outstanding senior notes of UScellular for new notes of T-Mobile with the same interest rate, interest payment dates, maturity dates and redemption terms as each corresponding series of senior notes of UScellular. In conjunction with the Exchange Offers, we also solicited consents for each series of the outstanding senior notes of UScellular to effect a number of amendments to the applicable indenture under which each such series of notes were issued and are governed (the “Consent Solicitations”). The consummation of the Exchange Offers and Consent Solicitations were subject to the closing of the UScellular acquisition, which occurred on August 1, 2025. On July 22, 2025, we entered into three separate asset purchase agreements for the acquisition of substantially all of the wireless operations assets (together with UScellular’s wireless operations and select spectrum assets, the “UScellular Wireless Business”) of each of Farmers Cellular Telephone Company, Inc., Iowa RSA No. 9 Limited Partnership and Iowa RSA No. 12 Limited Partnership (collectively, the “Iowa Entities”) for an aggregate purchase price of $175 million payable in cash. Prior to our acquisition of the Iowa Entities, UScellular held a minority interest in each of the Iowa Entities. The UScellular Wireless Business offers a comprehensive range of wireless communications products and services. As a combined company, we expect to increase competition in the telecommunications industry, achieve synergies and enhance our rural 5G coverage with our combined network footprint. Following the closing of the transactions, UScellular and the Iowa Entities will retain ownership of their other spectrum licenses, as well as their towers. On August 1, 2025, upon the completion of certain customary closing conditions, including the receipt of certain regulatory approvals (the “UScellular Acquisition Date”), we completed the acquisition of the UScellular Wireless Business (the “UScellular Acquisition”), and as a result, the UScellular Wireless Business became wholly owned by T-Mobile. In exchange, on the UScellular Acquisition Date, we transferred cash of $2.8 billion. Additionally, the closing of the UScellular Acquisition obligated us to execute the Exchange Offers. UScellular senior notes with an aggregate outstanding principal balance of $1.7 billion were subsequently exchanged for T-Mobile notes in the Exchange Offers. The obligation to execute the Exchange Offers was recorded as debt assumed in the UScellular Acquisition with an aggregate assigned fair value of $1.7 billion. On the UScellular Acquisition Date, UScellular changed its legal name to Array Digital Infrastructure, Inc. On August 5, 2025, we issued debt with an aggregate principal balance of $1.7 billion in settlement of the Exchange Offers. The issued debt consisted of 6.700% Senior Notes due 2033 in an aggregate principal amount of $489 million, 6.250% Senior Notes due 2069 in an aggregate principal amount of $393 million, 5.500% Senior Notes due March 2070 in an aggregate principal amount of $401 million and 5.500% Senior Notes due June 2070 in an aggregate principal amount of $395 million. The notes rank equally with all other unsecured and unsubordinated indebtedness of T-Mobile USA, Inc. On the UScellular Acquisition Date, we entered into a master license agreement to lease space on at least 2,100 towers being retained by UScellular and extended our tenancy term on approximately 600 additional towers where we are already leasing space from UScellular for 15 years post-closing. In addition, through the master license agreement, we leased space on approximately 1,800 additional UScellular towers on an interim basis for up to 30 months after the UScellular Acquisition Date. As a result of entering into the master license agreement, we recorded right-of use assets and lease liabilities of $1.0 billion each on the UScellular Acquisition Date, with a corresponding increase to both deferred tax liabilities and assets of $261 million. For towers where we were not leasing space prior to the UScellular Acquisition Date, the related balances have been included in the fair value of assets acquired and liabilities assumed. The financial results of the UScellular Wireless Business from the UScellular Acquisition Date through December 31, 2025, were not material to our Consolidated Statements of Comprehensive Income, nor were they material to our prior period consolidated results on a pro forma basis. Transaction-related costs for the UScellular Acquisition did not have a material impact on our Consolidated Statements of Comprehensive Income. Consideration Transferred The acquisition-date fair value of consideration transferred in the UScellular Acquisition is comprised of the following:
The amount of cash paid on the UScellular Acquisition Date is subject to customary adjustments, which require agreement by the parties. Fair Value of Assets Acquired and Liabilities Assumed We have accounted for the UScellular Acquisition as a business combination. The identifiable assets acquired and liabilities assumed of the UScellular Wireless Business were recorded at their provisionally assigned fair values as of the UScellular Acquisition Date and consolidated with those of T-Mobile. Assigning fair values to the assets acquired and liabilities assumed at the UScellular Acquisition Date requires the use of judgment regarding estimates and assumptions. For the provisionally assigned fair values of the assets acquired and liabilities assumed, we used the cost, income and market approaches. The following table summarizes the provisionally assigned fair values for each class of assets acquired and liabilities assumed at the UScellular Acquisition Date. We retained the services of certified valuation specialists to assist with assigning values to certain acquired assets and liabilities assumed. We are in the process of finalizing the valuation of the assets acquired and liabilities assumed. Therefore, the provisionally assigned fair values set forth below are subject to adjustment as additional information is obtained.
(1)Includes $749 million, $51 million and $698 million of Operating lease right-of-use assets, Short-term operating lease liabilities and Operating lease liabilities, respectively, for towers associated with the UScellular master license agreement where we were not leasing tower space prior to the UScellular Acquisition Date. (2)The obligation to execute the Exchange Offers was recorded as debt assumed in the UScellular Acquisition with an aggregate assigned fair value of $1.7 billion. Intangible Assets Goodwill was assigned to our Wireless segment and has a provisionally assigned value of $219 million, which represents the excess of the consideration transferred over the fair values of assets acquired and liabilities assumed. The provisionally assigned goodwill recognized includes synergies expected to be achieved from the operations of the combined company, the assembled workforce of UScellular and intangible assets that do not qualify for separate recognition. Of the total provisionally assigned amount of goodwill resulting from the UScellular Acquisition of $219 million, the preliminary amount deductible for tax purposes is $32 million. Expected synergies from the UScellular Acquisition include the cost savings from the planned integration of network infrastructure, facilities, personnel and systems. Other intangible assets acquired include $379 million of customer relationships with an estimated weighted-average useful life of ten years and $18 million of tradenames with an estimated weighted-average useful life of one year. The customer relationships are amortized using the sum-of-the-years digits method over their estimated useful lives and the tradenames are amortized on a straight-line basis over their estimated useful lives. The preliminary fair value of customer relationships was estimated using the income approach. This fair value measurement is based on significant inputs not observable in the market, and, therefore, represents a Level 3 measurement as defined in ASC 820. The key assumptions in applying the income approach include revenue over an estimated period of time, the discount rate, forecasted expenses and contributory asset charges. The preliminary fair value of Spectrum licenses of $1.7 billion was estimated using the market and income approach, specifically a Greenfield model. This fair value measurement is based on significant inputs not observable in the market and, therefore, represents a Level 3 measurement as defined in ASC 820. The key assumptions in applying the income approach include the discount rate, estimated market share, estimated capital and operating expenditures, forecasted service revenue and a long-term growth rate for a hypothetical market participant that enters the wireless industry and builds a nationwide wireless network. Acquired Receivables The fair value of the assets acquired includes Accounts receivable of $317 million and EIP receivables of $891 million. The unpaid principal balance under these contracts as of the UScellular Acquisition Date was $328 million and $1.1 billion, respectively. The difference between the fair value and the unpaid principal balance primarily represents discounting for market interest rates and amounts expected to be uncollectible. Acquisition of Vistar Media Inc. On December 20, 2024, we entered into an agreement and plan of merger for the acquisition of 100% of the outstanding capital stock of Vistar, a provider of technology solutions for digital-out-of-home advertisements (the “Vistar Acquisition”). Upon the completion of certain customary closing conditions, including the receipt of certain regulatory approvals, on February 3, 2025 (the “Vistar Acquisition Date”), we completed the Vistar Acquisition, and as a result, Vistar became a wholly owned subsidiary of T-Mobile. In exchange, we transferred cash of $621 million. A portion of the payment made on the Vistar Acquisition Date was for the settlement of preexisting relationships with Vistar and is excluded from the fair value of consideration transferred. The financial results of Vistar from the Vistar Acquisition Date through December 31, 2025, were not material to our Consolidated Statements of Comprehensive Income, nor were they material to our prior period consolidated results on a pro forma basis. Costs related to the Vistar Acquisition were not material to our Consolidated Statements of Comprehensive Income. Fair Value of Assets Acquired and Liabilities Assumed We have accounted for the Vistar Acquisition as a business combination. The identifiable assets acquired and liabilities assumed from Vistar were recorded at their provisionally assigned fair values as of the Vistar Acquisition Date and consolidated with those of T-Mobile. Assigning fair values to the assets acquired and liabilities assumed at the Vistar Acquisition Date requires the use of judgment regarding estimates and assumptions. For the provisionally assigned fair values of the assets acquired and liabilities assumed, we used the cost and income approaches. The following table summarizes the provisionally assigned fair values for each class of assets acquired and liabilities assumed at the Vistar Acquisition Date. We are in the process of finalizing the valuation of the assets acquired and liabilities assumed, including income tax-related amounts. Therefore, the provisionally assigned fair values set forth below are subject to adjustment as additional information is obtained.
Intangible Assets Goodwill was assigned to our Wireless segment and has a provisionally assigned value of $343 million, which represents the excess of the consideration transferred over the fair values of assets acquired and liabilities assumed. The provisionally assigned goodwill recognized includes expected growth in service revenues to be achieved from the operations of the combined company, the assembled workforce of Vistar and intangible assets that do not qualify for separate recognition. Other intangible assets acquired include $201 million of customer relationships with an estimated weighted-average useful life of ten years, $8 million of tradenames with an estimated weighted-average useful life of four years and $55 million of other intangible assets with an estimated weighted-average useful life of four years. The customer relationships are amortized using the sum-of-the-years digits method over their estimated useful lives and the tradenames are amortized on a straight-line basis over their estimated useful lives. The preliminary fair value of customer relationships was estimated using the income approach. This fair value measurement is based on significant inputs not observable in the market, and, therefore, represents a Level 3 measurement as defined in ASC 820. The key assumptions in applying the income approach include revenue over an estimated period of time, the discount rate, forecasted expenses and contributory asset charges. Acquisition of Blis Holdco Limited On February 18, 2025, we entered into a share purchase agreement for the acquisition of 100% of the outstanding capital stock of Blis, a provider of advertising solutions (the “Blis Acquisition”). Upon the completion of certain customary closing conditions, including the receipt of certain regulatory approvals, on March 3, 2025 (the “Blis Acquisition Date”), we completed the Blis Acquisition, and as a result, Blis became a wholly owned subsidiary of T-Mobile. In exchange, we transferred cash of $180 million. A portion of the payment made on the Blis Acquisition Date was for the settlement of preexisting relationships with Blis and is excluded from the fair value of consideration transferred. The financial results of Blis from the Blis Acquisition Date through December 31, 2025, were not material to our Consolidated Statements of Comprehensive Income, nor were they material to our prior period consolidated results on a pro forma basis. Costs related to the Blis Acquisition were not material to our Consolidated Statements of Comprehensive Income. We have accounted for the Blis Acquisition as a business combination. The fair value of consideration transferred as of the Blis Acquisition Date totaled $174 million. The identifiable assets acquired and liabilities assumed from Blis were recorded at their provisionally assigned fair values as of the Blis Acquisition Date and consolidated with those of T-Mobile. The provisionally assigned fair values of total assets acquired, including goodwill, and total liabilities assumed at the Blis Acquisition Date were $264 million and $90 million, respectively. Goodwill was assigned to our Wireless segment and has a provisionally assigned value of $105 million, which represents the excess of the consideration transferred over the fair values of assets acquired and liabilities assumed. The provisionally assigned goodwill recognized includes expected growth in service revenues to be achieved from the operations of the combined company, the assembled workforce of Blis and intangible assets that do not qualify for separate recognition. We are in the process of finalizing the valuation of the assets acquired and liabilities assumed. Therefore, the provisionally assigned fair values above are subject to adjustment as additional information is obtained.
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Joint Ventures |
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Dec. 31, 2025 | |
| Business Combination, Asset Acquisition, Transaction between Entities under Common Control, and Joint Venture Formation [Abstract] | |
| Joint Ventures | Note 3 – Joint Ventures Lumos Joint Venture On April 24, 2024, we entered into a definitive agreement with a fund operated by EQT, EQT Infrastructure VI (“Fund VI”), to establish a joint venture between us and Fund VI to acquire Lumos (“Lumos”), a fiber-to-the-home platform, from EQT’s predecessor fund, EQT Infrastructure III. On April 1, 2025, we completed the joint acquisition of Lumos upon the completion of certain customary closing conditions, including the receipt of certain regulatory approvals. During the three months ended June 30, 2025, we invested $932 million to acquire a 50% equity interest in the joint venture and 97,000 fiber customers. For the customers acquired, we recognized an intangible asset amortized using the sum-of-the-years digits method over a weighted-average useful life of nine years. Following the joint acquisition, Lumos transitioned to a wholesale model where we are the anchor tenant owning residential and small business customer relationships. The funds invested by us will be used by the joint venture to fund future fiber builds. In addition, pursuant to the definitive agreement, we expect to make an additional capital contribution of approximately $500 million between 2027 and 2028 under the existing business plan. Metronet Joint Venture On July 18, 2024, we entered into a definitive agreement with KKR & Co. Inc. to establish a joint venture to acquire Metronet Holdings, LLC and certain of its affiliates (collectively, “Metronet”), a fiber-to-the-home platform. On July 24, 2025, we completed the joint acquisition of Metronet upon the completion of certain customary closing conditions, including the receipt of certain regulatory approvals. During the three months ended September 30, 2025, we invested $4.6 billion to acquire a 50% equity interest in the joint venture and 713,000 fiber customers. For the customers acquired, we recognized an intangible asset amortized using the sum-of-the-years digits method over a weighted-average useful life of ten years. Following the joint acquisition, Metronet became a wholesale services provider, and its residential fiber retail operations and customers transitioned to us. We do not anticipate making further capital contributions under the existing business plan. Method of Accounting We account for the Lumos and Metronet joint ventures under the equity method of accounting. We recognize revenues for fiber customers and the related wholesale costs paid to the joint ventures for network access within Postpaid revenues and Cost of services, respectively, on our Consolidated Statements of Comprehensive Income.
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Receivables and Related Allowance for Credit Losses |
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| Receivables [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Receivables and Related Allowance for Credit Losses | Note 4 – Receivables and Related Allowance for Credit Losses We maintain an allowance for credit losses by applying an expected credit loss model. Each period, management assesses the appropriateness of the level of allowance for credit losses by considering credit risk inherent within each portfolio segment as of the end of the period. We consider a receivable past due when a customer has not paid us by the contractually specified payment due date. Account balances are written off against the allowance for credit losses if collection efforts are unsuccessful and the receivable balance is deemed uncollectible (customer default), based on factors such as customer credit ratings, as well as the length of time the amounts are past due. Our portfolio of receivables is comprised of two portfolio segments: accounts receivable and EIP receivables. Accounts Receivable Portfolio Segment Accounts receivable balances are predominately comprised of amounts currently due from customers (e.g., for wireless communications services), device insurance administrators, wholesale partners, other carriers and third-party retail channels. We estimate credit losses associated with our accounts receivable portfolio segment using an expected credit loss model, which utilizes an aging schedule methodology based on historical information and is adjusted for asset-specific considerations, current economic conditions and reasonable and supportable forecasts. Our approach considers a number of factors, including our overall historical credit losses and payment experience, as well as current collection trends, such as write-off frequency and severity. We also consider other qualitative factors such as current and forecasted macroeconomic conditions. We consider the need to adjust our estimate of credit losses for reasonable and supportable forecasts of future macroeconomic conditions. To do so, we monitor external forecasts of changes in real U.S. gross domestic product and forecasts of consumer credit behavior for comparable credit exposures. EIP Receivables Portfolio Segment Based upon customer credit profiles at the time of customer origination, as well as subsequent credit performance, we designate the EIP receivables segment into two customer classes of “Prime” and “Subprime.” Prime customer receivables are those with lower credit risk, and Subprime customer receivables are those with higher credit risk. Customers may be required to make a down payment on their equipment purchases if their assessed credit risk exceeds established underwriting thresholds. In addition, certain customers within the Subprime category may be required to pay a deposit. To determine a customer’s credit profile and assist in determining their credit class, we use a proprietary credit scoring model that measures the credit quality of a customer leveraging several factors, such as credit bureau information and consumer credit risk scores, as well as service and device plan characteristics. Installment loans acquired in the UScellular Acquisition are included in EIP receivables and generally have an initial term of 36 months. We applied our proprietary credit scoring model to the customers acquired in the UScellular Acquisition with an outstanding EIP receivable balance. Based on tenure, consumer credit risk score and credit profile, these acquired customers were classified into our customer classes of Prime or Subprime. Our proprietary credit scoring model is applied to all EIP arrangements originated after the UScellular Acquisition Date. For EIP receivables acquired in the UScellular Acquisition, the difference between the fair value and unpaid principal balance of the loan at the acquisition date is accreted to interest income over the contractual life of the loan using the effective interest method. EIP receivables had a combined weighted-average effective interest rate of 10.3% and 11.1% as of December 31, 2025 and 2024, respectively. The following table summarizes the EIP receivables, including imputed discounts and related allowance for credit losses:
(1)Through the UScellular Acquisition, we acquired EIP receivables with a fair value of $891 million as of August 1, 2025. As they were recorded at fair value, an imputed discount was not recognized on the acquired receivables. Many of our loss estimation techniques rely on delinquency-based models categorized by customer credit class; therefore, delinquency is an important indicator of credit quality in the establishment of our allowance for credit losses for EIP receivables. We manage our EIP receivables portfolio segment using delinquency and customer credit class as key credit quality indicators. The following table presents the amortized cost of our EIP receivables, including EIP receivables acquired through the UScellular Acquisition, by delinquency status, customer credit class and year of origination as of December 31, 2025:
We estimate credit losses on our EIP receivables segment by applying an expected credit loss model, which relies on historical loss data adjusted for current conditions to calculate default probabilities or an estimate for the frequency of customer default. Our assessment of default probabilities or frequency includes receivables delinquency status, historical loss experience, how long the receivables have been outstanding and customer credit ratings, as well as customer tenure. We multiply these estimated default probabilities by our estimated loss given default, which is the estimated amount of default or the severity of loss. As we do for our accounts receivable portfolio segment, we consider the need to adjust our estimate of credit losses on EIP receivables for reasonable and supportable forecasts of economic conditions through monitoring external forecasts and periodic internal statistical analyses. The following table presents write-offs of our EIP receivables by year of origination for the year ended December 31, 2025:
Activity for the years ended December 31, 2025, 2024 and 2023 in the allowance for credit losses and unamortized imputed discount balances for the accounts receivable and EIP receivables segments were as follows:
Off-Balance-Sheet Credit Exposures We do not have material off-balance-sheet credit exposures as of December 31, 2025. In connection with the sales of certain service accounts receivable and EIP receivables pursuant to the sale arrangements, we provide guarantees of credit performance included on our Consolidated Balance Sheets measured at fair value that are based on a discounted cash flow model using Level 3 inputs, including estimated customer default rates and credit worthiness, dilutions and recoveries. See Note 5 – Sales of Certain Receivables for further information.
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| Sales of Certain Receivables | Note 5 – Sales of Certain Receivables We regularly enter into transactions to sell certain service accounts receivable and EIP receivables. The transactions, including our continuing involvement with the sold receivables and the respective impacts to our consolidated financial statements, are described below. Sales of EIP Receivables Overview of the Transaction In 2015, we entered into an arrangement to sell certain EIP receivables on a revolving basis (the “EIP Sale Arrangement”). The maximum funding commitment of the sale arrangement is $1.3 billion. On November 10, 2025, we extended the scheduled expiration date of the EIP Sale Arrangement to November 18, 2026. As of both December 31, 2025 and 2024, the EIP Sale Arrangement provided funding of $1.3 billion. Sales of EIP receivables occur daily and are settled on a monthly basis. In connection with this EIP Sale Arrangement, we formed a wholly owned subsidiary, which qualifies as a bankruptcy remote entity (the “EIP BRE”). Pursuant to the EIP Sale Arrangement, selected receivables are transferred to the EIP BRE. The EIP BRE then sells the receivables to a non-consolidated and unaffiliated third-party entity over which we do not exercise any level of control, nor does the third-party entity qualify as a VIE. Variable Interest Entity We determined that the EIP BRE is a VIE, as its equity investment at risk lacks the obligation to absorb a certain portion of its expected losses. We have a variable interest in the EIP BRE and have determined that we are the primary beneficiary based on our ability to direct the activities that most significantly impact the EIP BRE’s economic performance. Those activities include selecting which receivables are transferred into the EIP BRE and sold in the EIP Sale Arrangement and funding of the EIP BRE. Additionally, our equity interest in the EIP BRE obligates us to absorb losses and gives us the right to receive benefits from the EIP BRE that could potentially be significant to the EIP BRE. Accordingly, we include the balances and results of operations of the EIP BRE in our consolidated financial statements. The following table summarizes the carrying amounts and classification of liabilities, which consist of the recourse guarantee, included on our Consolidated Balance Sheets with respect to the EIP BRE:
In addition, the EIP BRE is a separate legal entity with its own separate creditors who will be entitled, prior to any liquidation of the EIP BRE, to be satisfied prior to any value in the EIP BRE becoming available to us. Accordingly, the assets of the EIP BRE may not be used to settle our general obligations, and creditors of the EIP BRE have no recourse to our general credit. Sales of Service Accounts Receivable Overview of the Transaction In 2014, we entered into an arrangement to sell certain service accounts receivable on a revolving basis (the “Service Receivable Sale Arrangement”). The maximum funding commitment of the Service Receivable Sale Arrangement is $950 million, and the facility expires in February 2026. As of both December 31, 2025 and 2024, the Service Receivable Sale Arrangement provided funding of $775 million. Sales of receivables occur daily and are settled on a monthly basis. The receivables consist of service charges currently due from customers and are short-term in nature. In connection with the Service Receivable Sale Arrangement, we formed a wholly owned subsidiary, which qualifies as a bankruptcy remote entity, to sell service accounts receivable (the “Service BRE”). Pursuant to the amended Service Receivable Sale Arrangement, selected receivables are transferred to the Service BRE. The Service BRE then sells the receivables to a non-consolidated and unaffiliated third-party entity over which we do not exercise any level of control and which does not qualify as a VIE. Variable Interest Entity We determined that the Service BRE is a VIE, as its equity investment at risk lacks the obligation to absorb a certain portion of expected losses. We have a variable interest in the Service BRE and have determined that we are the primary beneficiary based on our ability to direct the activities that most significantly impact the Service BRE’s economic performance. Those activities include selecting which receivables are transferred into the Service BRE and sold in the Service Receivable Sale Arrangement and funding the Service BRE. Additionally, our equity interest in the Service BRE obligates us to absorb losses and gives us the right to receive benefits from the Service BRE that could potentially be significant to the Service BRE. Accordingly, we include the balances and results of operations of the Service BRE in our consolidated financial statements. The following table summarizes the carrying amounts and classification of liabilities included on our Consolidated Balance Sheets with respect to the Service BRE:
In addition, the Service BRE is a separate legal entity with its own separate creditors who will be entitled, prior to any liquidation of the Service BRE, to be satisfied prior to any value in the Service BRE becoming available to us. Accordingly, the assets of the Service BRE may not be used to settle our general obligations, and creditors of the Service BRE have no recourse to our general credit. Sales of Receivables The transfers of service accounts receivable and EIP receivables to the non-consolidated entities are accounted for as sales of financial assets. Once identified for sale, the receivable is recorded at the lower of cost or fair value. Upon sale, we derecognize the net carrying amount of the receivables. We recognized the cash proceeds received upon sale in Net cash provided by operating activities on our Consolidated Statements of Cash Flows. On October 22, 2024, we executed an amendment to the EIP Sale Arrangement and an amendment to the Service Receivable Sale Arrangement (together, the “Pledge Amendments”). Prior to the effective date of the Pledge Amendments, the credit enhancement feature of each of the EIP Sale Arrangement and the Service Receivable Sale Arrangement was in the form of a deferred purchase price. Pursuant to the Pledge Amendments, effective on November 1, 2024, the credit enhancement feature of each arrangement is replaced by a recourse guarantee liability, which is collateralized by pledged but unsold receivables. On November 1, 2024, we re-recognized $193 million of gross service accounts receivables and $604 million of gross EIP receivables. Prior to the effective date of the Pledge Amendments, cash proceeds related to beneficial interests in securitization transactions in the form of the deferred purchase price were presented within Net cash used in investing activities on our Consolidated Statements of Cash Flows. Following the effective date of the Pledge Amendments, all cash proceeds associated with sold receivables are recognized within Net cash provided by operating activities on our Consolidated Statements of Cash Flows. The recourse guarantee, and prior to the effective date of the Pledge Amendments, the deferred purchase price, represents a financial instrument that is primarily tied to the creditworthiness of our customers. At inception, we elected to measure the recourse guarantee liabilities at fair value with changes in fair value included in Selling, general and administrative expenses on our Consolidated Statements of Comprehensive Income. The fair value of the recourse guarantee liabilities is determined based on a discounted cash flow model which primarily uses Level 3 inputs, including estimated customer default rates and credit worthiness, dilutions and recoveries. Our recourse guarantee liabilities related to the sales of service receivables and EIP receivables were $130 million and $148 million as of December 31, 2025, and December 31, 2024, respectively. These liabilities were collateralized by $266 million and $286 million of gross service receivables and $535 million and $505 million of gross EIP receivables pledged, but unsold as of December 31, 2025, and December 31, 2024, respectively, which represent our maximum exposure under the recourse guarantee. The following table summarizes the impact of the sales of certain service receivables and EIP receivables on our Consolidated Balance Sheets:
We recognized losses from sales of receivables, including changes in fair value of the recourse guarantee liabilities, beginning on November 1, 2024, and deferred purchase price assets of $58 million, $62 million and $165 million for the years ended December 31, 2025, 2024 and 2023, respectively, in Selling, general and administrative expenses on our Consolidated Statements of Comprehensive Income. Continuing Involvement Pursuant to the EIP Sale Arrangement and Service Receivable Sale Arrangement described above, we have continuing involvement with the service accounts receivables and EIP receivables we sell, as we service the receivables, are required to replace certain receivables, including ineligible receivables, aged receivables and receivables where a write-off is imminent, and may be responsible for absorbing credit losses through performance under our recourse guarantee liabilities. We continue to service the customers and their related receivables, including facilitating customer payment collection, in exchange for a monthly servicing fee. As the receivables are sold on a revolving basis, the customer payment collections on sold receivables may be reinvested in new receivable sales. At the direction of the purchasers of the sold receivables, we apply the same policies and procedures while servicing the sold receivables as we apply to our owned receivables, and we continue to maintain normal relationships with our customers.
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| Property and Equipment | Note 6 – Property and Equipment The components of property and equipment, excluding amounts transferred to held for sale, were as follows:
Total depreciation and amortization expense relating to property and equipment and financing lease right-of-use assets was $12.6 billion, $12.1 billion and $12.0 billion for the years ended December 31, 2025, 2024 and 2023. We capitalize interest associated with the acquisition or construction of certain property and equipment and spectrum intangible assets. We recognized capitalized interest of $43 million, $34 million and $104 million for the years ended December 31, 2025, 2024 and 2023, respectively. Asset retirement obligations are primarily for certain legal obligations to remediate leased property on which our network infrastructure and administrative assets are located. Activity in our asset retirement obligations for the years ended December 31, 2025 and 2024, were as follows:
The corresponding assets, net of accumulated depreciation, related to asset retirement obligations were $561 million and $423 million as of December 31, 2025 and 2024, respectively. Billing System Impairment In connection with our accelerated digital transformation initiatives, including streamlining our billing technology, we evaluated our billing system architecture strategy and concluded components of our billing system replacement plan and associated development will no longer serve our future needs. As a result, we recorded a non-cash impairment of $278 million related to capitalized software development costs during the year ended December 31, 2025, within Impairment expense on our Consolidated Statements of Comprehensive Income.
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Goodwill, Spectrum License Transactions and Other Intangible Assets |
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| Goodwill, Spectrum License Transactions and Other Intangible Assets | Note 7 – Goodwill, Spectrum License Transactions and Other Intangible Assets Goodwill The changes in the carrying amount of goodwill for the years ended December 31, 2025 and 2024, are as follows:
Goodwill Impairment Assessment Certain non-financial assets, including goodwill and indefinite-lived intangible assets such as Spectrum licenses, are not required to be measured at fair value on a recurring basis and are reported at carrying value. However, these assets are required to be assessed for impairment when events or circumstances indicate that carrying value may not be recoverable, and at least annually for goodwill and indefinite-lived intangible assets. The nonrecurring measurements of the fair value of these assets, for which observable market information may be limited, are classified within Level 3 of the fair value hierarchy. In the event an impairment is required, the asset is adjusted to its estimated fair value using market-based assumptions, to the extent they are available, as well as other assumptions that may require significant judgment. For our annual assessment of our reporting units, we employed a qualitative approach. In addition, for our assessment of the Wireless reporting unit, the fair value was estimated using a market approach, which is based on market capitalization. We considered any events or change in circumstances that occurred, noting no indication that the fair value of our reporting units may be below their carrying amount at December 31, 2025. Spectrum Licenses The following table summarizes our spectrum license activity for the years ended December 31, 2025, 2024 and 2023:
Cash payments to acquire spectrum licenses and payments for costs to clear spectrum are included in Purchases of spectrum licenses and other intangible assets, including deposits. Cash proceeds from the sale of spectrum licenses are included in Proceeds from the sale of property, equipment and intangible assets on our Consolidated Statements of Cash Flows. Spectrum Auctions In September 2022, the FCC announced that we were the winning bidder of 7,156 licenses in Auction 108 (2.5 GHz spectrum) for an aggregate price of $304 million. At inception of Auction 108 in June 2022, we deposited $65 million. We paid the FCC the remaining $239 million for the licenses won in the auction in September 2022. On February 29, 2024, the FCC issued to us the licenses won in Auction 108, and substantially all of these licenses were deployed in March 2024. Spectrum Exchange Transactions During the years ended December 31, 2025 and 2024, we recognized $434 million and $1.2 billion, respectively, of non-cash spectrum license acquisitions associated with the closing of certain exchange transactions. During the years ended December 31, 2025 and 2024, we recognized $34 million and $202 million, respectively, of gains associated with the closing of certain spectrum exchange transactions as a reduction to Selling, general and administrative expenses on our Consolidated Statements of Comprehensive Income. There were no gains or losses associated with spectrum exchange transactions during the year ended December 31, 2023. As of December 31, 2025 and 2024, $3 million and $159 million, respectively, of spectrum licenses were classified as held for sale within Other assets on our Consolidated Balance Sheets related to additional spectrum exchange agreements pending regulatory approval and closing, which are expected to close in the next 12 months. The closings of these transactions are not expected to have a significant impact on our Consolidated Statements of Comprehensive Income. License Purchase Agreements DISH Network Corporation On July 1, 2020, we and DISH Network Corporation (“DISH”) entered into a License Purchase Agreement (the “DISH License Purchase Agreement”) pursuant to which DISH agreed to purchase certain 800 MHz spectrum licenses for a total of approximately $3.6 billion. On October 15, 2023, we and DISH entered into an amendment (the “LPA Amendment”) to the DISH License Purchase Agreement pursuant to which, among other things, the parties agreed that (1) DISH will pay us a $100 million non-refundable extension fee (in lieu of the approximately $72 million termination fee that had previously been agreed to), (2) the closing for the purchase of the spectrum licenses by DISH will occur no later than April 1, 2024, (3) if DISH has not purchased the spectrum licenses by such date for any reason (including failure to receive the required FCC approval prior to such date), then the DISH License Purchase Agreement will automatically terminate, and we will retain the $100 million extension fee, (4) if DISH does purchase the spectrum by April 1, 2024, the $100 million extension fee will be credited against the $3.6 billion purchase price, and (5) we are permitted to commence auction of the spectrum prior to April 1, 2024 at our discretion (and subject to DISH’s purchase right). The LPA Amendment was approved by the Court and became effective on October 23, 2023. On October 25, 2023, we received a payment of $100 million from DISH for the extension fee and recorded a corresponding liability within Other current liabilities on our Consolidated Balance Sheets. DISH did not purchase the 800 MHz spectrum by April 1, 2024. As such, we recognized a gain for the $100 million extension fee previously paid by DISH during the year ended December 31, 2024, within Selling, general and administrative expenses on our Consolidated Statements of Comprehensive Income and relieved the liability that was initially recorded upon receipt of the payment. On October 1, 2024, we concluded the auction process for the disposition of the spectrum as required under the final judgment agreed to by us, Deutsche Telekom AG (“DT”), Sprint LLC, SoftBank Group Corp. (“SoftBank”) and DISH with the U.S. District Court for the District of Columbia, which was approved by the Court on April 1, 2020, to offer the licenses for sale. We did not receive a qualifying bid and had been relieved of the obligation to sell the spectrum licenses. On May 30, 2025, we entered into a license purchase agreement for the sale of the 800 MHz spectrum licenses, as discussed below. Channel 51 License Co LLC and LB License Co, LLC On August 8, 2022, we, Channel 51 License Co LLC and LB License Co, LLC (together with Channel 51 License Co LLC, the “Sellers”) entered into License Purchase Agreements pursuant to which we will acquire spectrum in the 600 MHz band from the Sellers in exchange for total cash consideration of $3.5 billion. On March 30, 2023, we and the Sellers entered into Amended and Restated License Purchase Agreements pursuant to which we and the Sellers agreed to separate the transaction into two tranches of licenses, with the closings on the acquisitions of certain licenses in Chicago, Dallas and New Orleans being deferred in order to potentially expedite the regulatory approval process for the remainder of the licenses. Subsequently, on August 25, 2023, we and the Sellers entered into Amendments No. 1 to the Amended and Restated License Purchase Agreements, which deferred the closings of certain additional licenses in Chicago and Dallas into the second closing tranche. Together, the licenses with closings deferred into the second closing tranche represent $1.1 billion of the aggregate $3.5 billion cash consideration. The licenses being acquired by us, and the total consideration being paid for the licenses, remain the same under the original License Purchase Agreements and subsequent amendments. The FCC approved the purchase of the first tranche on December 29, 2023. The first tranche closed on June 24, 2024, and the associated payment of $2.4 billion was made on August 5, 2024. The FCC approved the purchase of the Dallas licenses included in the second tranche on October 22, 2024. The purchase of the Dallas licenses closed on December 6, 2024, and the associated payment of $541 million was made on the same day. The FCC approved the purchase of the remaining Chicago and New Orleans deferred licenses from the second tranche on April 15, 2025. The purchase of the remaining licenses closed on June 2, 2025, and the associated payment of $604 million was made on the same day. Comcast Corporation On September 12, 2023, we entered into a license purchase agreement (the “Comcast License Purchase Agreement”) with Comcast Corporation and its affiliate, Comcast OTR1, LLC (together with Comcast Corporation, “Comcast”), pursuant to which we will acquire spectrum in the 600 MHz band from Comcast (the “Comcast Licenses”) in exchange for total cash consideration of between $1.2 billion and $3.3 billion, subject to an application for FCC approval. The licenses will be acquired without any associated networks. The final purchase price will be determined, in the aggregate and on a per license basis, based on the set of Comcast Licenses at the time the parties make required transfer filings with the FCC. Prior to the time of such filings, Comcast has the right to remove any or all of a certain specified subset of the Comcast Licenses, totaling $2.1 billion (the “Optional Sale Licenses”), from the Comcast License Purchase Agreement. The removal of any Optional Sale Licenses would reduce the final purchase price by the assigned value of each such license, from the maximum purchase price of $3.3 billion. The Comcast Licenses are subject to an exclusive leasing arrangement between us and Comcast, which was entered into contemporaneously with the Comcast License Purchase Agreement. If Comcast elects to remove an Optional Sale License from the Comcast License Purchase Agreement, the associated lease for such Optional Sale License will terminate, but no sooner than two years from the date of the Comcast License Purchase Agreement (with us having a minimum period of time after any such termination to cease transmitting on such license’s associated spectrum). On January 13, 2025, we and Comcast entered into an amendment to the Comcast License Purchase Agreement pursuant to which we will acquire additional spectrum. Subsequent to the amendment, the total cash consideration for the transaction is between $1.2 billion and $3.4 billion. As a result of additional spectrum acquisitions we are planning with third parties, we have agreed with Comcast to accelerate the consummation of our acquisition of approximately $45 million of the Comcast Licenses. The parties are currently targeting a closing on the acquisition of this accelerated portion of the Comcast Licenses in the first half of 2026, with the remaining spectrum license acquisitions targeting a closing in the first half of 2028. N77 License Co LLC On September 10, 2024, we entered into a License Purchase Agreement with N77 License Co LLC (“Buyer”), pursuant to which Buyer had the option to purchase all or a portion of our remaining 3.45 GHz spectrum licenses in exchange for a range of cash consideration, with the specific licenses sold to be determined based upon the amount of committed financing raised by Buyer. Following receipt of the required regulatory approvals, on April 30, 2025, we completed the sale of a portion of our 3.45 GHz spectrum licenses for $2.0 billion. During the year ended December 31, 2025, we recognized an associated gain of $151 million as a reduction to Selling, general and administrative expenses on our Consolidated Statements of Comprehensive Income. Grain Management, LLC On May 30, 2025, we entered into a License and Unit Purchase Agreement with NEWLEVEL IV, L.P. and NEWLEVEL, LLC, both of which are affiliates of Grain Management, LLC (“Grain”), pursuant to which we will sell our 800 MHz spectrum licenses in exchange for cash consideration of $2.9 billion and the receipt of Grain’s 600 MHz spectrum licenses, which we are currently utilizing under lease agreements with Grain. In addition, we may receive a share of certain future proceeds from transactions entered into by Grain that monetize the 800 MHz spectrum licenses, subject to certain terms and conditions and following a certain return on invested capital for Grain. As of December 31, 2025, $3.6 billion of the associated 800 MHz spectrum licenses have been classified as held for sale at cost, with $2.9 billion and $690 million presented in Other current assets and Other assets, respectively, on our Consolidated Balance Sheets based on the nature of consideration to be received. The transaction is subject to customary closing conditions and contingent on the receipt of regulatory approvals, including the FCC’s approval regarding certain modifications to the 800 MHz spectrum licenses, and the parties are currently targeting a closing in the first half of 2026. We do not expect the transaction to have a material impact on our Consolidated Statements of Comprehensive Income upon the transaction close. In addition, we expect an increase to our cash income tax liability of approximately $850 million upon the transaction close. Impairment Assessment For our assessment of Spectrum license impairment, we employed a qualitative approach. No events or change in circumstances have occurred that indicate the fair value of the Spectrum licenses may be below their carrying amount at December 31, 2025. Other Intangible Assets The components of Other intangible assets were as follows:
(1)Includes intangible assets acquired through our acquisitions. See Note 2 - Business Combinations and Note 3 - Joint Ventures for more information. Amortization expense for intangible assets subject to amortization was $975 million, $857 million and $888 million for the years ended December 31, 2025, 2024 and 2023, respectively. The estimated aggregate future amortization expense for intangible assets subject to amortization is summarized below:
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Fair Value Measurements |
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| Fair Value Measurements | Note 8 – Fair Value Measurements The carrying values of Cash and cash equivalents, Accounts receivable and Accounts payable and accrued liabilities approximate fair value due to the short-term maturities of these instruments. The carrying values of EIP receivables approximate fair value as the receivables are generally recorded at their present value using an imputed interest rate. Derivative Financial Instruments We use derivatives to manage exposure to market risk, such as exposure to fluctuations in foreign currency exchange rates and interest rates. We designate certain derivatives as hedging instruments in a qualifying hedge accounting relationship to mitigate fluctuations in values or cash flows related to such risks caused by foreign currency or interest rate volatility. We do not use derivatives for trading or speculative purposes. Cash flows associated with qualifying hedge derivative instruments are presented in the same category on our Consolidated Statements of Cash Flows as the item being hedged. For fair value hedges, other than foreign currency hedges, the change in the fair value of the derivative instruments is recognized in earnings through the same income statement line item as the change in the fair value of the hedged item. For cash flow hedges, as well as fair value foreign currency hedges, the change in the fair value of the derivative instruments is reported in Accumulated other comprehensive loss and recognized in earnings when the hedged item is recognized in earnings, again, through the same income statement line item. We record derivatives on our Consolidated Balance Sheets at fair value that is derived primarily from observable market data, including exchange rates, interest rates and forward curves. These market inputs are utilized in the discounted cash flow calculation considering the instrument's term, notional amount, discount rate and credit risk. Significant inputs to derivative valuations are generally observable in active markets and, as such, are classified as Level 2 in the fair value hierarchy. Cross-Currency Swaps We enter into cross-currency swaps to offset changes in the value of our payments on foreign-denominated debt in USD and to mitigate the impact of foreign currency transaction gains and losses. We have entered into cross-currency swap agreements, with the same notional amounts as our EUR-denominated debt issuances, to effectively convert €4.8 billion to USD borrowings, with the same maturities as our EUR-denominated debt issuances. The swaps qualify and have been designated as fair value hedges of our EUR-denominated debt, mitigating our exposure to foreign currency transaction gains and losses. Accordingly, all changes in the fair value of the swaps will be initially recorded through Accumulated other comprehensive loss on our Consolidated Balance Sheets and reclassified to earnings in an amount that exactly offsets the periodic transaction gain or loss on remeasuring the debt, such that there will be no earnings volatility due to changes in foreign-currency exchange rates. Transaction gains or losses on remeasuring the EUR-denominated debt, as well as the offsetting swap amounts, are recorded within Other (expense) income, net on our Consolidated Statements of Comprehensive Income. Changes in the fair value of the swaps may be different from the current period transaction gain or loss on remeasurement of the debt, in which case the difference will remain in Accumulated other comprehensive loss on our Consolidated Balance Sheets. These differences generally represent credit or liquidity risk, referred to as a basis spread, and the time value of money (“excluded components”). The value of the excluded components is recognized in earnings using a systematic and rational method by accruing the current-period swap settlements into Interest expense, net, on our Consolidated Statements of Comprehensive Income. If an amount remains in Accumulated other comprehensive loss on our Consolidated Balance Sheets upon settlement of the derivative, those amounts will be reclassified to earnings at that time. The following table summarizes the activity of our cross-currency swaps:
Interest Rate Lock Derivatives In April 2020, we terminated our interest rate lock derivatives entered into in October 2018. Aggregate changes in the fair value of our terminated interest rate lock derivatives, net of amortization, of $771 million and $960 million are presented in Accumulated other comprehensive loss on our Consolidated Balance Sheets as of December 31, 2025 and 2024, respectively. During the years ended December 31, 2025, 2024 and 2023, we amortized $254 million, $236 million, and $219 million respectively, from Accumulated other comprehensive loss into Interest expense, net, on our Consolidated Statements of Comprehensive Income. We expect to amortize $274 million of the Accumulated other comprehensive loss associated with the derivatives into Interest expense, net, over the 12 months ending December 31, 2026. Recourse Guarantee Liabilities In connection with the sales of certain service and EIP accounts receivable pursuant to the sale arrangements, we have recourse guarantee liabilities measured at fair value that are based on a discounted cash flow model using unobservable Level 3 inputs, including estimated customer default rates and credit worthiness. See Note 5 – Sales of Certain Receivables for further information. The carrying amounts of our recourse guarantee liabilities of $130 million and $148 million are included on our Consolidated Balance Sheets as of December 31, 2025 and 2024, respectively. Debt The fair values of our Senior Notes and spectrum-backed Senior Secured Notes to third parties were determined based on quoted market prices in active markets. Accordingly, our Senior Notes and spectrum-backed Senior Secured Notes to third parties were classified as Level 1 within the fair value hierarchy. The fair value of our Senior Notes to affiliates was determined based on the fair value of the Senior Notes to third parties with similar terms and maturities. Accordingly, our Senior Notes to affiliates were classified as Level 2 within the fair value hierarchy. The fair values of our Senior Notes to third parties (EUR-denominated) and ABS Notes were primarily based on quoted prices in inactive markets for identical instruments and observable changes in market interest rates, both of which are Level 2 inputs. Accordingly, our Senior Notes to third parties (EUR-denominated) and ABS Notes were classified as Level 2 within the fair value hierarchy. The fair value of our ECA Facilities (as defined below) was determined based on a discounted cash flow approach using market interest rates of instruments with similar maturities and credit risk. Accordingly, our ECA Facilities were classified as Level 2 within the fair value hierarchy. Although we have determined the estimated fair values using available market information and commonly accepted valuation methodologies, judgment was required in interpreting market data to develop fair value estimates for the Senior Notes to third parties (EUR-denominated), Senior Notes to affiliates, ABS Notes and ECA Facilities. The fair value estimates were based on information available as of December 31, 2025 and 2024. As such, our estimates are not necessarily indicative of the amount we could realize in a current market exchange. The carrying amounts and fair values of our short-term and long-term debt, excluding accrued interest, included on our Consolidated Balance Sheets were as follows:
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| Debt Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Debt | Note 9 – Debt Debt was as follows:
(1)Interest is based on the Secured Overnight Financing Rate (“SOFR”) for the interest period plus an applicable margin. The floating rate, including the applicable margin, on the ECA Facility due March 2036 was 4.927% for the interest payment made during the year ended December 31, 2025. No interest was paid on the ECA Facility due November 2036 during the year ended December 31, 2025. Long-term debt was classified as follows:
Our effective interest rate, excluding the impact of derivatives and capitalized interest, was approximately 4.2% and 4.1% on weighted-average debt outstanding of $83.0 billion and $78.3 billion for the years ended December 31, 2025 and 2024, respectively. The weighted-average debt outstanding was calculated by applying an average of the monthly ending balances of total short-term and long-term debt to third parties and short-term and long-term debt to affiliates, net of unamortized premiums, discounts, debt issuance costs and consent fees. Senior Notes The Senior Notes are guaranteed on a senior unsecured basis by the Company and certain of our consolidated subsidiaries. They are redeemable at our discretion, in whole or in part, at any time. The redemption price is calculated by reference to the date on which such notes are redeemed and includes a premium, generally until the notes reach a par call date, on or after which they are redeemable at par. The amount of time by which the par call date, where applicable, precedes the maturity date of the respective series of Senior Notes generally varies from one month to three years. Issuances and Borrowings During the year ended December 31, 2025, we issued and borrowed the following debt:
(1)Includes accrued or paid issuance costs and discounts. (2)In connection with the closing of the UScellular Acquisition, we became obligated to execute the Exchange Offers of certain senior notes of UScellular pursuant to which T-Mobile notes with an aggregate outstanding principal balance of $1.7 billion were issued with the same interest rate, interest payment dates, maturity dates and redemption terms as each corresponding series of senior notes of UScellular. See Note 2 – Business Combinations for further information regarding the UScellular Acquisition. Subsequent to December 31, 2025, on January 12, 2026, we issued $1.2 billion of 5.000% Senior Notes due 2036 and $850 million of 5.850% Senior Notes due 2056. Credit Facilities We maintain a revolving credit facility (the “Revolving Credit Facility”) with an aggregate commitment amount of $7.5 billion, including a letter of credit sub-facility of up to $1.5 billion and a swingline loan sub-facility of up to $500 million. As of December 31, 2025 and 2024, we did not have an outstanding balance under the Revolving Credit Facility. Subsequent to December 31, 2025, on January 5, 2026, we entered into a Second Amended and Restated Credit Agreement (the “January 2026 Credit Agreement”) with certain financial institutions named therein. The January 2026 Credit Agreement amends and restates in its entirety the Amended and Restated Credit Agreement dated as of October 17, 2022. The January 2026 Credit Agreement increases the commitments under the revolving credit facility from $7.5 billion to $10.0 billion and extends the maturity of the commitments to January 5, 2031, except as otherwise extended or replaced. Note Redemptions and Repayments During the year ended December 31, 2025, we made the following note redemptions and repayments:
(1)Write-off of issuance costs and consent fees are included in Other (expense) income, net on our Consolidated Statements of Comprehensive Income. Write-off of issuance costs and consent fees are included in Other, net within Net cash provided by operating activities on our Consolidated Statements of Cash Flows. Subsequent to December 31, 2025, on January 22, 2026, we delivered notices of redemption on $3.0 billion aggregate principal amount of our 4.750% Senior Notes due 2028 and 4.750% Senior Notes to affiliates due 2028. We redeemed the notes at par on February 1, 2026. Asset-backed Notes In connection with issuing the ABS Notes, we formed a wholly owned subsidiary, which qualifies as a bankruptcy remote entity (the “ABS BRE”), and a trust (the “ABS Trust” and together with the ABS BRE, the “ABS Entities”), in which the ABS BRE holds a residual interest. The ABS BRE’s residual interest in the ABS Trust represents the rights to all funds not needed to make required payments on the ABS Notes and other related payments and expenses. Under the terms of the ABS Notes, our wholly owned subsidiary, T-Mobile Financial LLC (“FinCo”), and certain of our other wholly owned subsidiaries (collectively, the “Originators”) transfer EIP receivables to the ABS BRE, which in turn transfers such receivables to the ABS Trust, which issued the ABS Notes. The Class A senior ABS Notes have an expected weighted average life of approximately 2.5 years. Under the terms of the transaction, there is a two-year revolving period during which we may transfer additional receivables to the ABS Entities as collections on the receivables are received. The EIP receivables transferred to the ABS Entities and related assets, consisting primarily of restricted cash, will only be available for payment of the ABS Notes and expenses related thereto, payments to the Originators in respect of additional transfers of device payment plan agreement receivables, and other obligations arising from our ABS Notes transactions, and will not be available to pay our other obligations until the associated ABS Notes and related obligations are satisfied. The third-party investors in the Class A senior ABS Notes have legal recourse only to the assets of the ABS Trust securing the ABS Notes and do not have any recourse to T-Mobile with respect to the payment of principal and interest. The receivables transferred to the ABS Trust will only be available for payment of the ABS Notes and other obligations arising from the transaction and will not be available to pay any obligations or claims of T-Mobile’s creditors. Under a parent support agreement, T-Mobile has agreed to guarantee the performance of the obligations of FinCo, which will continue to service the receivables, and the other T-Mobile entities participating in the transaction. However, T-Mobile does not guarantee any principal or interest on the ABS Notes or any payments on the underlying EIP receivables. Cash collections on the EIP receivables are required at certain specified times to be placed into segregated accounts. Deposits to the segregated accounts are considered restricted cash and are included in Other current assets on our Consolidated Balance Sheets. As of December 31, 2025, $2.0 billion of our ABS Notes were secured in total by $2.6 billion of gross EIP receivables and collections on such receivables. Our ABS Notes and the assets securing this debt are included on our Consolidated Balance Sheets. The expected maturities of our ABS Notes as of December 31, 2025, were as follows:
Variable Interest Entities The ABS Entities meet the definition of a VIE for which we have determined that we are the primary beneficiary as we have the power to direct the activities of the ABS Entities that most significantly impact their performance. Those activities include selecting which receivables are transferred into the ABS Entities, servicing such receivables, and funding of the ABS Entities. Additionally, our equity interest and residual interest in the ABS BRE and the ABS Trust, respectively, obligate us to absorb losses and give us the right to receive benefits from the ABS Entities that could potentially be significant to the ABS Entities. Accordingly, we include the balances and results of operations of the ABS Entities in our consolidated financial statements. The following table summarizes the carrying amounts and classification of assets and liabilities included in our Consolidated Balance Sheets with respect to the ABS Entities:
See Note 4 – Receivables and Related Allowance for Credit Losses for additional information on the EIP receivables used to secure the ABS Notes. Master Receivables Financing Agreement Subsequent to December 31, 2025, on February 5, 2026, we entered into a master receivables financing agreement with certain third parties that provides for a revolving loan facility secured by pledged service customer relationships, which include current as well as future monthly service receivables, during the borrowing period (the “MRFA”). Concurrently with the execution of the MRFA, we borrowed $1.0 billion with a floating interest rate indexed to SOFR plus an applicable margin, maturing on February 5, 2027, a one-year borrowing period. The net proceeds will be reflected in Proceeds from issuance of short-term debt on our Condensed Consolidated Statements of Cash Flows for the three months ending March 31, 2026. Spectrum Financing On April 1, 2020, in connection with the closing of the Sprint Merger, we assumed Sprint’s spectrum-backed notes, which are collateralized by the acquired, directly held and third-party leased Spectrum licenses (collectively, the “Spectrum Portfolio”) transferred to wholly owned bankruptcy-remote special purpose entities (collectively, the “Spectrum Financing SPEs”). As of December 31, 2025 and 2024, the total outstanding obligations under these Notes were $827 million and $1.3 billion, respectively. In October 2016, certain subsidiaries of Sprint Communications, Inc. transferred the Spectrum Portfolio to the Spectrum Financing SPEs, which was used as collateral to raise an initial $3.5 billion in senior secured notes (the “2016 Spectrum-Backed Notes”) bearing interest at 3.360% per annum under a $7.0 billion securitization program. The 2016 Spectrum-Backed Notes were repayable over a five-year term, with interest-only payments over the first four quarters and amortizing quarterly principal payments thereafter commencing December 2017 through September 2021. We fully repaid the 2016 Spectrum-Backed Notes in 2021. In March 2018, Sprint issued approximately $3.9 billion in aggregate principal amount of senior secured notes (the “2018 Spectrum-Backed Notes” and together with the 2016 Spectrum-Backed Notes, the “Spectrum-Backed Notes”) under the existing $7.0 billion securitization program, consisting of two series of senior secured notes. The first series of notes totaled $2.1 billion in aggregate principal amount, bearing interest at 4.738% per annum, and had quarterly interest-only payments until June 2021, with additional quarterly principal payments commencing in June 2021 through March 2025, which was fully repaid on January 13, 2025. The second series of notes totaled approximately $1.8 billion in aggregate principal amount, bears interest at 5.152% per annum, and had quarterly interest-only payments until June 2023, with additional quarterly principal payments commencing in June 2023 through March 2028. As of December 31, 2025, $368 million of the aggregate principal amount was classified as Short-term debt on our Consolidated Balance Sheets. The Spectrum Portfolio, which also serves as collateral for the Spectrum-Backed Notes, remains substantially identical to the original portfolio from October 2016. Simultaneously with the October 2016 offering, Sprint Communications, Inc. entered into a long-term lease with the Spectrum Financing SPEs for the ongoing use of the Spectrum Portfolio. Sprint Communications, Inc. is required to make monthly lease payments to the Spectrum Financing SPEs in an aggregate amount that is market-based relative to the spectrum usage rights as of the closing date and equal to $165 million per month. The lease payments, which are guaranteed by T-Mobile subsidiaries subsequent to the Sprint Merger, are sufficient to service all outstanding series of the 2016 Spectrum-Backed Notes and the lease also constitutes collateral for the senior secured notes. Because the Spectrum Financing SPEs are wholly owned T-Mobile subsidiaries subsequent to the Sprint Merger, these entities are consolidated and all intercompany activity has been eliminated. Each Spectrum Financing SPE is a separate legal entity with its own separate creditors who will be entitled, prior to and upon the liquidation of the respective Spectrum Financing SPE, to be satisfied out of the Spectrum Financing SPE’s assets prior to any assets of such Spectrum Financing SPE becoming available to T-Mobile. Accordingly, the assets of each Spectrum Financing SPE are not available to satisfy the debts and other obligations owed to other creditors of T-Mobile until the obligations of such Spectrum Financing SPE under the Spectrum-Backed Notes are paid in full. Certain provisions of the Spectrum Financing facility require us to maintain specified cash collateral balances. Amounts associated with these balances are considered to be restricted cash. Restricted Cash Certain provisions of our debt agreements require us to maintain specified cash collateral balances. Amounts associated with these balances are considered to be restricted cash. Commercial Paper On July 25, 2023, we established an unsecured short-term commercial paper program with the ability to borrow up to $2.0 billion from time to time. This program supplements our other available external financing arrangements, and proceeds are expected to be used for general corporate purposes. As of December 31, 2025 and 2024, there was no outstanding balance under this program. Standby Letters of Credit For the purposes of securing our general purpose obligations and obligations to provide device insurance services, we maintain an agreement for standby letters of credit with certain financial institutions. Our outstanding standby letters of credit were $116 million and $152 million as of December 31, 2025 and 2024, respectively. ECA Facilities On January 31, 2025, we entered into a credit agreement with certain financial institutions, backed by an Export Credit Agency (an “ECA Facility”), providing for a loan of up to $1.0 billion to finance network equipment-related purchases (the “ECA Facility due March 2036”). The obligations under this ECA Facility are also guaranteed by us and by all of our wholly owned domestic restricted subsidiaries (subject to customary exceptions). On March 17, 2025, we drew down the full $1.0 billion available under the ECA Facility due March 2036 and recognized the net proceeds within Proceeds from issuance of long-term debt, net on our Consolidated Statements of Cash Flows. Borrowings under this ECA Facility are amortized semi-annually in equal installments up to the maturity date of March 15, 2036. Interest is based on the SOFR for the interest period plus an applicable margin. On August 29, 2025, we entered into an ECA Facility, providing for a loan of up to $1.0 billion to finance network equipment-related purchases (the “ECA Facility due November 2036”). The obligations under this ECA Facility are also guaranteed by us and by all of our wholly owned domestic restricted subsidiaries (subject to customary exceptions). During the fourth quarter of 2025, we drew down the full $1.0 billion available under the ECA Facility due November 2036 and recognized the net proceeds within Proceeds from issuance of long-term debt, net on our Consolidated Statements of Cash Flows. Borrowings under this ECA Facility are amortized semi-annually in equal installments up to the maturity date of November 30, 2036. Interest is based on SOFR for the interest period plus an applicable margin.
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Tower Obligations |
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| Leases [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Tower Obligations | Note 10 – Tower Obligations Existing CCI Tower Lease Arrangements In 2012, we conveyed to Crown Castle International Corp. (“CCI”) the exclusive right to manage and operate approximately 6,200 tower sites (“CCI Lease Sites”) via a master prepaid lease with site lease terms ranging from 23 to 37 years. CCI has fixed-price purchase options for the CCI Lease Sites totaling approximately $2.0 billion, exercisable annually on a per-tranche basis at the end of the lease term during the period from December 31, 2035, through December 31, 2049. If CCI exercises its purchase option for any tranche, it must purchase all the towers in the tranche. We lease back a portion of the space at certain tower sites. Assets and liabilities associated with the operation of the tower sites were transferred to special purpose entities (“SPEs”). Assets included ground lease agreements or deeds for the land on which the towers are situated, the towers themselves and existing subleasing agreements with other mobile network operator tenants that lease space at the tower sites. Liabilities included the obligation to pay ground lease rentals, property taxes and other executory costs. We determined the SPEs containing the CCI Lease Sites (“Lease Site SPEs”) are VIEs as they lack sufficient equity to finance their activities. We have a variable interest in the Lease Site SPEs but are not the primary beneficiary as we lack the power to direct the activities that most significantly impact the Lease Site SPEs’ economic performance. These activities include managing tenants and underlying ground leases, performing repair and maintenance on the towers, the obligation to absorb expected losses and the right to receive the expected future residual returns from the purchase option to acquire the CCI Lease Sites. As we determined that we are not the primary beneficiary and do not have a controlling financial interest in the Lease Site SPEs, the Lease Site SPEs are not included on our consolidated financial statements. However, we also considered if this arrangement resulted in the sale of the CCI Lease Sites for which we would derecognize the tower assets. By assessing whether control had transferred, we concluded that transfer of control criteria, as discussed in the revenue standard, were not met. Accordingly, we recorded this arrangement as a financing whereby we recorded debt, a financial obligation, and the CCI Lease Sites tower assets remained on our Consolidated Balance Sheets. We recorded long-term financial obligations in the amount of the net proceeds received and recognize interest on the tower obligations. The tower obligations are increased by interest expense and amortized through contractual leaseback payments made by us to CCI and through net cash flows generated and retained by CCI from the operation of the tower sites. Acquired CCI Tower Lease Arrangements Prior to the Sprint Merger, Sprint entered into a lease-out and leaseback arrangement with Global Signal Inc., a third party that was subsequently acquired by CCI, that conveyed to CCI the exclusive right to manage and operate approximately 6,400 tower sites (“Master Lease Sites”) via a master prepaid lease. These agreements were assumed upon the close of the Sprint Merger, at which point the remaining term of the lease-out was approximately 17 years with no renewal options. CCI has a fixed price purchase option for all (but not less than all) of the leased or subleased sites for approximately $2.3 billion, exercisable one year prior to the expiration of the agreement and ending 120 days prior to the expiration of the agreement. We lease back a portion of the space at certain tower sites. We considered if this arrangement resulted in the sale of the Master Lease Sites for which we would derecognize the tower assets. By assessing whether control had transferred, we concluded that transfer of control criteria, as discussed in the revenue standard, were not met. Accordingly, we recorded this arrangement as a financing whereby we recorded debt, a financial obligation, and the Master Lease Sites tower assets remained on our Consolidated Balance Sheets. We recognize interest expense on the tower obligations. The tower obligations are increased by the interest expense and amortized through contractual leaseback payments made by us to CCI. The tower assets are reported in Property and equipment, net on our Consolidated Balance Sheets and are depreciated to their estimated residual values over the expected useful life of the towers, which is 20 years. Leaseback Arrangement On January 3, 2022, we entered into an agreement (the “Crown Agreement”) with CCI. The Crown Agreement extends the current term of the leasebacks by up to 12 years and modifies the leaseback payments for both the Existing CCI Tower Lease Arrangements and the Acquired CCI Tower Lease Arrangements. As a result of the Crown Agreement, there was an increase in our financing obligation as of the effective date of the Crown Agreement of approximately $1.2 billion, with a corresponding decrease to Other long-term liabilities associated with unfavorable contract terms. The modification resulted in a revised interest rate under the effective interest method for the tower obligations: 11.6% for the Existing CCI Tower Lease Arrangements and 5.3% for the Acquired CCI Tower Lease Arrangements. There were no changes made to either of our master prepaid leases with CCI. The following table summarizes the balances associated with both of the tower arrangements on our Consolidated Balance Sheets:
Future minimum payments related to the tower obligations are approximately $389 million for the 12-month period ending December 31, 2026, $810 million in total for both of the 12-month periods ending December 31, 2027 and 2028, $862 million in total for both of the 12-month periods ending December 31, 2029 and 2030, and $3.2 billion in total thereafter. We are contingently liable for future ground lease payments through the remaining term of the CCI Lease Sites and the Master Lease Sites. These contingent obligations are not included in Operating lease liabilities, as any amount due is contractually owed by CCI based on the subleasing arrangement. Under the arrangement, we remain primarily liable for ground lease payments on approximately 900 sites and have included lease liabilities of $241 million in our Operating lease liabilities as of December 31, 2025.
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Revenue from Contracts with Customers |
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| Revenue from Contract with Customer [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Revenue from Contracts with Customers | Note 11 – Revenue from Contracts with Customers Disaggregation of Revenue We provide wireless communications and broadband services to a variety of customers, but focus primarily on two categories of customers: •Postpaid customers generally include customers who are qualified to pay after receiving service utilizing phones, 5G broadband gateways, fiber connections, mobile internet devices (including tablets and hotspots), wearables, DIGITS and other connected devices (including SyncUP and IoT); and •Prepaid customers generally include customers who pay for service in advance. We also provide services to wholesale customers which include Machine-to-Machine and Mobile Virtual Network Operator customers that operate on our network but are managed by wholesale partners. Postpaid service revenues, including postpaid phone revenues and postpaid other revenues, were as follows:
The balances presented in each revenue line item on our Consolidated Statements of Comprehensive Income represent categories of revenue from contracts with customers disaggregated by type of product and service. Postpaid and prepaid service revenues also include revenues earned for providing premium services to customers, such as device insurance services. Contract Balances The contract asset and contract liability balances from contracts with customers as of December 31, 2025 and 2024, were as follows:
Contract assets primarily represent revenue recognized for equipment sales with promotional bill credits offered to customers that are paid over time and are contingent on the customer maintaining a service contract. The change in the contract asset balance reflects customer activity related to new promotions, offset by billings on existing contracts and impairment, which is recognized as bad debt expense. The current portion of our contract assets of $920 million and $492 million as of December 31, 2025 and 2024, respectively, was included in Other current assets on our Consolidated Balance Sheets. Contract liabilities are recorded when fees are collected, or we have an unconditional right to consideration (a receivable) in advance of delivery of goods or services. Changes in contract liabilities are primarily related to the activity of prepaid customers, including customers acquired through the Ka’ena Acquisition, as well as contract liabilities assumed in the UScellular Acquisition. Contract liabilities are primarily included in Deferred revenue on our Consolidated Balance Sheets. Revenues for the years ended December 31, 2025, 2024 and 2023, include the following:
Remaining Performance Obligations As of December 31, 2025, the aggregate amount of the transaction price allocated to remaining service performance obligations for postpaid contracts with subsidized devices and promotional bill credits that result in an extended service contract is $2.7 billion. We expect to recognize revenue as the service is provided on these postpaid contracts, generally over a period of 24 months from the time of origination. Information about remaining performance obligations that are part of a contract that has an original expected duration of one year or less has been excluded from the above, which primarily consists of monthly service contracts. Certain of our wholesale, roaming and service contracts include variable consideration based on usage and performance. This variable consideration has been excluded from the disclosure of remaining performance obligations. As of December 31, 2025, the aggregate amount of the contractual minimum consideration for wholesale, roaming and service contracts is $1.2 billion, $938 million and $2.2 billion for 2026, 2027 and 2028 and beyond, respectively. These contracts have a remaining duration ranging from less than one year to six years. Contract Costs The balance of deferred incremental costs to obtain contracts with customers was $2.0 billion for both December 31, 2025 and 2024, and is included in Other assets on our Consolidated Balance Sheets. Deferred contract costs incurred to obtain postpaid service contracts are amortized over a period of 24 months. The amortization period is monitored to reflect any significant change in assumptions. Amortization of deferred contract costs included in Selling, general and administrative expenses on our Consolidated Statements of Comprehensive Income were $1.9 billion, $2.0 billion, and $1.8 billion for the years ended December 31, 2025, 2024 and 2023, respectively. The deferred contract cost asset is assessed for impairment on a periodic basis. There were no impairment losses recognized on deferred contract cost assets for the years ended December 31, 2025, 2024 and 2023.
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Segment Reporting |
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| Segment Reporting | Note 12 – Segment Reporting We manage our business activities on a consolidated basis and operate as a single operating segment: Wireless. We primarily derive our revenue in the United States by providing wireless communications and broadband services to customers using our wireless networks and selling devices that provide customers access to our wireless networks. The accounting policies of the Wireless segment are the same as those described in Note 1 – Summary of Significant Accounting Policies. Our chief operating decision maker (“CODM”) is our President and Chief Executive Officer. The CODM uses Net income, as reported on our Consolidated Statements of Comprehensive Income, in evaluating performance of the Wireless segment and determining how to allocate resources of the Company as a whole, including investing in our networks and customers, stockholder return programs and acquisition strategy. The CODM does not review assets in evaluating the results of the Wireless segment, and therefore, such information is not presented. The following table provides the operating financial results of our Wireless segment:
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Employee Compensation and Benefit Plans |
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| Share-Based Payment Arrangement [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Employee Compensation and Benefit Plans | Note 13 – Employee Compensation and Benefit Plans In June 2023, the stockholders of the Company approved the T-Mobile US, Inc. 2023 Incentive Award Plan (the “2023 Plan”), which replaced the 2013 Omnibus Incentive Plan and the Sprint Corporation Amended and Restated 2015 Omnibus Incentive Plan that T-Mobile assumed in connection with the closing of the Sprint Merger (collectively, with the 2023 Plan, the “Incentive Plans”). Under the 2023 Plan, we are authorized to issue up to 33 million shares of our common stock and can grant stock options, stock appreciation rights, restricted stock, RSUs and PRSUs to eligible employees, consultants, advisors and non-employee directors. As of December 31, 2025, there were approximately 25 million shares of common stock available for future grants under the 2023 Plan. We grant RSUs to eligible employees, key executives and certain non-employee directors and PRSUs to eligible key executives. RSUs entitle the grantee to receive shares of our common stock upon vesting (with vesting generally occurring annually over a three-year service period), subject to continued service through the applicable vesting date. PRSUs entitle the holder to receive shares of our common stock at the end of a performance period of generally up to three years, if the applicable performance goals are achieved, and generally subject to continued service through the applicable performance period. The number of shares ultimately received by the holder of PRSUs is dependent on our business performance against the specified performance goal(s) over a pre-established performance period. We also maintain an employee stock purchase plan (“ESPP”), under which eligible employees can purchase our common stock at a discounted price. Stock-based compensation expense and related income tax benefits were as follows:
Stock Awards The following activity occurred under the Incentive Plans during the year ended December 31, 2025: Time-Based Restricted Stock Units
Performance-Based Restricted Stock Units
(1)Represents PRSUs granted prior to 2025 for which the performance achievement period was completed in 2025, resulting in incremental unit awards. These PRSU awards are also included in the amount vested in 2025. PRSUs included in the table above are shown at target. Share payout can range from 0% to 200% based on different performance outcomes. Weighted-average grant date fair value of RSU and PRSU awards assumed through acquisition is based on the fair value on the date assumed. Payment of the underlying shares in connection with the vesting of RSU and PRSU awards generally triggers a tax obligation for the employee, which is required to be remitted to the relevant tax authorities. With respect to RSUs and PRSUs settled in shares, we have agreed to withhold shares of common stock otherwise issuable under the RSU and PRSU awards to cover certain of these tax obligations, with the net shares issued to the employee accounted for as outstanding common stock. We withheld 1,677,377, 1,552,111 and 2,027,800 shares of common stock to cover tax obligations associated with the payment of shares upon vesting of stock awards and remitted cash of $434 million, $269 million and $297 million to the appropriate tax authorities for the years ended December 31, 2025, 2024 and 2023, respectively. Employee Stock Purchase Plan Our ESPP allows eligible employees to contribute up to 15% of their eligible earnings toward the semi-annual purchase of our shares of common stock at a discounted price, subject to an annual maximum dollar amount. Employees can purchase stock at a 15% discount applied to the closing stock price on the first or last day of the six-month offering period, whichever price is lower. The number of shares issued under our ESPP was 1,150,449, 1,519,242 and 1,771,475 for the years ended December 31, 2025, 2024 and 2023, respectively. In June 2023, the stockholders of the Company approved an amendment to our ESPP plan, increasing the share reserve to 14,000,000. As of December 31, 2025, the number of securities remaining available for future sale and issuance under the ESPP was 10,622,260. Pension and Other Postretirement Benefits Plans On December 20, 2024, we settled $572 million of our Sprint Retirement Pension Plan retiree obligations, resulting in a gain of $80 million, recognized within Other (expense) income, net on our Consolidated Statements of Comprehensive Income. This partial plan settlement is the result of us purchasing a nonparticipating annuity that involves the transfer of significant risk from us to the insurance company (commonly referred to as a “buy-out”). This transaction is an irrevocable action, relieves us of our responsibility for the postretirement benefit obligations that were settled, and eliminates the risks related to the obligation and the assets used to effect the settlement. The objective for the investment portfolio of the Pension Plan is to achieve a long-term nominal rate of return, net of fees, that exceeds the Pension Plan's long-term expected rate of return on investments for funding purposes. To meet this objective, our investment strategy is governed by an asset allocation policy, whereby a targeted allocation percentage is assigned to each asset class as follows: 51% to equities; 30% to fixed income investments; and 19% to real estate, infrastructure and private assets. Actual allocations are allowed to deviate from target allocation percentages within a range for each asset class as defined in the investment policy. The long-term expected rate of return on plan assets was 8% and 7% for the years ended December 31, 2025 and 2024, respectively, while the actual rate of return on plan assets was 16% and 6% for the years ended December 31, 2025 and 2024, respectively. The long-term expected rate of return on investments for funding purposes is 8% for the year ending December 31, 2026. The components of net benefit recognized for the Pension Plan were as follows:
The net benefit associated with the Pension Plan is included in Other income (expense), net on our Consolidated Statements of Comprehensive Income. Investments of the Pension Plan are measured at fair value on a recurring basis, which is determined using quoted market prices or estimated fair values. As of December 31, 2025, 13% of the investment portfolio was valued at quoted prices in active markets for identical assets, 76% was valued using quoted prices for similar assets in active or inactive markets, or other observable inputs, and 11% was valued using unobservable inputs that are supported by little or no market activity, the majority of which used the net asset value per share (or its equivalent) as a practical expedient to measure the fair value. As of December 31, 2024, 26% of the investment portfolio was valued at quoted prices in active markets for identical assets, 62% was valued using quoted prices for similar assets in active or inactive markets, or other observable inputs, and 12% was valued using unobservable inputs that are supported by little or no market activity, the majority of which used the net asset value per share (or its equivalent) as a practical expedient to measure the fair value. The fair values of our Pension Plan assets and certain other postretirement benefit plan assets in aggregate were $732 million and $626 million as of December 31, 2025 and 2024, respectively. Our accumulated benefit obligations in aggregate were $908 million and $895 million as of December 31, 2025 and 2024, respectively. As a result, the plans were underfunded by approximately $176 million and $269 million as of December 31, 2025 and 2024, respectively, and were recorded in Other long-term liabilities on our Consolidated Balance Sheets. In determining our pension obligation for the years ended December 31, 2025 and 2024, we used a weighted-average discount rate of 6% for both years. During the years ended December 31, 2025, 2024 and 2023, we made contributions of $66 million, $52 million and $32 million, respectively, to the benefit plans. We expect to make contributions to the Plan of $31 million through the year ending December 31, 2026. Future benefits expected to be paid are approximately $54 million for the 12-month period ending December 31, 2026, $114 million in total for both of the 12-month periods ending December 31, 2027 and 2028, $122 million in total for both of the 12-month periods ending December 31, 2029 and 2030, and $323 million in total thereafter. Employee Retirement Savings Plan We sponsor retirement savings plans for the majority of our employees under Section 401(k) of the Internal Revenue Code and similar plans. The plans allow employees to contribute a portion of their pre-tax and post-tax income in accordance with specified guidelines. The plans provide that we match a percentage of employee contributions up to certain limits. Employer matching contributions were $171 million, $159 million and $171 million for the years ended December 31, 2025, 2024 and 2023, respectively.
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| Income Tax Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Income Taxes | Note 14 – Income Taxes Our sources of Income before income taxes were as follows:
Income tax expense is summarized as follows:
The following table summarizes income tax expense and the calculation of the effective income tax rate:
In 2025, state and local income taxes in California, Illinois, Iowa, Texas and Wisconsin comprise the majority of the domestic state and local income taxes, net of federal income tax effect category. In 2024, state and local income taxes in California, Florida, Illinois, New Jersey and Texas comprise the majority of that same category. In 2023, state and local income taxes in California, Florida, Illinois, New Jersey, New York and New York City comprise the majority of that same category. Significant components of deferred income tax assets and liabilities, tax effected, are as follows:
As of December 31, 2025, we have tax effected federal net operating loss (“NOL”) carryforwards of $1.8 billion, state NOL carryforwards of $1.4 billion and foreign NOL carryforwards of $8 million, expiring through 2045. Federal and certain state NOLs of $1.7 billion generated in and after 2018 do not expire. As of December 31, 2025, our tax effected federal, state and foreign NOL carryforwards for financial reporting purposes were approximately $167 million, $682 million and $8 million, respectively, less than our NOL carryforwards for federal, state and foreign income tax purposes, due to unrecognized tax benefits of the same amount. The unrecognized tax benefit amounts exclude offsetting tax effects of $180 million in other jurisdictions. As of December 31, 2025, we have research and development, corporate alternative minimum tax, investment and other general business credit carryforwards with a combined value of $648 million for federal income tax purposes, an immaterial amount of which begins to expire in 2042. As of December 31, 2025, 2024 and 2023, our valuation allowance was $240 million, $259 million and $306 million, respectively. The change from December 31, 2024, to December 31, 2025 primarily related to the release of valuation allowance on state NOLs due to the expiration of those attributes. The change from December 31, 2023, to December 31, 2024 primarily related to a reduction in the valuation allowance against federal and state deferred tax assets resulting from a change in expected utilization of accumulated capital losses. We file income tax returns in the U.S. federal jurisdiction and in various state and foreign jurisdictions. We are currently under examination by various states. Management does not believe the resolution of any of the audits will result in a material change to our financial condition, results of operations or cash flows. The IRS has concluded audits of certain of our federal tax returns, most recently the 2020 tax year; however, NOL and other carryforwards for certain prior periods remain open for examination. U.S. federal, state and foreign examination for years prior to 2006 are generally closed. A reconciliation of the beginning and ending amount of unrecognized tax benefits were as follows:
As of December 31, 2025, 2024 and 2023, we had $1.3 billion in unrecognized tax benefits that, if recognized, would affect our annual effective tax rate. Penalties and interest on income tax assessments are included in Selling, general and administrative and Interest expense, respectively, on our Consolidated Statements of Comprehensive Income. The accrued interest and penalties associated with unrecognized tax benefits are insignificant. Income taxes paid, net of refunds received, were as follows:
NM - Not meaningful, the amount of income taxes paid does not meet the 5% disaggregation threshold for reporting.
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Stockholder Return Programs |
12 Months Ended |
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Dec. 31, 2025 | |
| Equity [Abstract] | |
| Stockholder Return Programs | Note 15 – Stockholder Return Programs 2022 Stock Repurchase Program On September 8, 2022, our Board of Directors authorized our 2022 Stock Repurchase Program for up to $14.0 billion of our common stock through September 30, 2023. During the nine months ended September 30, 2023, we repurchased 77,460,937 shares of our common stock at an average price per share of $141.57 for a total purchase price of $11.0 billion under the 2022 Stock Repurchase Program. All shares purchased during the nine months ended September 30, 2023, were purchased at market price. 2023-2024 Stockholder Return Program On September 6, 2023, our Board of Directors authorized our 2023-2024 Stockholder Return Program of up to $19.0 billion that ran from October 1, 2023, through December 31, 2024. The 2023-2024 Stockholder Return Program consisted of repurchases of shares of our common stock and the payment of cash dividends. During the years ended December 31, 2024 and 2023, we paid an aggregate of $3.3 billion and $747 million, respectively, in cash dividends to our stockholders under the 2023-2024 Stockholder Return Program, which were presented within Net cash used in financing activities on our Consolidated Statements of Cash Flows, of which during the years ended December 31, 2024 and 2023, $1.7 billion and $393 million, respectively, were paid to DT. During the years ended December 31, 2024 and 2023, we repurchased 59,376,922 shares of our common stock at an average price per share of $187.07 for a total purchase price of $11.1 billion and 15,464,107 shares of our common stock at an average price per share of $144.95 for a total purchase price of $2.2 billion, respectively, under the 2023-2024 Stockholder Return Program. All shares repurchased during the years ended December 31, 2024 and 2023, were purchased at market price. 2025 Stockholder Return Program On December 13, 2024, we announced that our Board of Directors authorized our 2025 Stockholder Return Program of up to $14.0 billion through December 31, 2025. The 2025 Stockholder Return Program consisted of repurchases of shares of our common stock and the payment of cash dividends. On November 21, 2024, our Board of Directors declared a cash dividend of $0.88 per share on our issued and outstanding common stock, which was paid on March 13, 2025, to stockholders of record as of the close of business on February 28, 2025. On February 6, 2025, our Board of Directors declared a cash dividend of $0.88 per share on our issued and outstanding common stock, which was paid on June 12, 2025, to stockholders of record as of the close of business on May 30, 2025. On June 5, 2025, our Board of Directors declared a cash dividend of $0.88 per share on our issued and outstanding common stock, which was paid on September 11, 2025, to stockholders of record as of the close of business on August 29, 2025. On September 18, 2025, our Board of Directors declared a cash dividend of $1.02 per share on our issued and outstanding common stock, which was paid on December 11, 2025, to stockholders of record as of the close of business on November 26, 2025. During the year ended December 31, 2025, we paid an aggregate of $4.1 billion in cash dividends to our stockholders under the 2025 Stockholder Return Program, which were presented within Net cash used in financing activities on our Consolidated Statements of Cash Flows, of which during the year ended December 31, 2025, $2.1 billion were paid to DT. During the year ended December 31, 2025, we repurchased 42,363,226 shares of our common stock at an average price per share of $232.96 for a total purchase price of $9.9 billion, under the 2025 Stockholder Return Program. All shares repurchased during the year ended December 31, 2025, were purchased at market price. 2026 Stockholder Return Program On December 11, 2025, we announced that our Board of Directors authorized our 2026 Stockholder Return Program of up to $14.6 billion that will run through December 31, 2026. The 2026 Stockholder Return Program is expected to consist of additional repurchases of shares of our common stock and the payment of cash dividends. The amount available under the 2026 Stockholder Return Program for share repurchases will be reduced by the amount of any cash dividends declared and paid by us. Under the 2026 Stockholder Return Program, share repurchases can be made from time to time using a variety of methods, which may include open market purchases, Rule 10b5-1 plans, accelerated share repurchases, privately negotiated transactions or otherwise, all in accordance with the rules of the Securities and Exchange Commission and other applicable legal requirements. The specific timing and amount of any share repurchases, and the specific timing and amount of any dividend payments, under the 2026 Stockholder Return Program will depend on prevailing share prices, general economic and market conditions, Company performance, and other considerations. In addition, the specific timing and amount of any dividend payments are subject to being declared on future dates by the Board in its sole discretion. The 2026 Stockholder Return Program does not obligate the Company to acquire any particular amount of common stock or to declare and pay any particular amount of dividends, and the 2026 Stockholder Return Program may be suspended or discontinued at any time at the Company’s discretion. On December 4, 2025, our Board of Directors declared a cash dividend of $1.02 per share on our issued and outstanding common stock, which will be paid on March 12, 2026, to stockholders of record as of the close of business on February 27, 2026. As of December 31, 2025, $1.1 billion for dividends payable is presented within Other current liabilities on our Consolidated Balance Sheets, of which $594 million is payable to DT. During the year ended December 31, 2025, we did not repurchase any shares of our common stock under the 2026 Stockholder Return Program. As of December 31, 2025, we had up to $14.6 billion remaining under the 2026 Stockholder Return Program. Subsequent to December 31, 2025, from January 1, 2026, through February 6, 2026, we repurchased 5,106,691 shares of our common stock at an average price per share of $192.61 for a total purchase price of $984 million. As of February 6, 2026, we had up to $13.6 billion remaining under the 2026 Stockholder Return Program for repurchases of shares and quarterly dividends through December 31, 2026.
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Earnings Per Share |
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| Earnings Per Share | Note 16 – Earnings Per Share The computation of basic and diluted earnings per share was as follows:
(1) For year ended December 31, 2025, the weighted-average number of shares issuable related to the Ka’ena Acquisition earnout (“Ka’ena Shares”) are included in our calculations of basic and diluted weighted-average shares outstanding based on the 20 trading day volume-weighted average price as of December 31, 2025, as further described below. (2) During 2023, the SoftBank Specified Shares (as defined below) were issued and included in our calculations of basic and diluted weighted-average shares outstanding as further described below. (3) Represents the Ka’ena Shares that were contingently issuable based on achievement of specified performance indicators from the Ka’ena Acquisition closing date of May 1, 2024, based on the maximum number of shares contingently issuable for the earnout and 20 trading day volume-weighted average price as of December 31, 2024. As of December 31, 2025, we had authorized 100 million shares of preferred stock, with a par value of $0.00001 per share. There was no preferred stock outstanding as of December 31, 2025 and 2024. Potentially dilutive securities were not included in the computation of diluted earnings per share if to do so would have been anti-dilutive. The Ka’ena Shares were previously contingent consideration for the Ka’ena Acquisition. On June 30, 2025, we amended the Merger and Unit Purchase Agreement to set the calculation of the earnout as the difference between the maximum purchase price of $1.35 billion and the upfront payment, as adjusted, and removed the requirement for Ka’ena to achieve specified performance indicators. The Ka’ena Shares issuable are included in the calculation of basic and diluted weighted-average shares outstanding for the year ended December 31, 2025. The Ka’ena Shares are expected to be issued after the Ka’ena Acquisition earnout payment date. On February 20, 2020, T-Mobile, SoftBank and DT entered into a letter agreement (the “Letter Agreement”). Pursuant to the Letter Agreement, an aggregate of 48,751,557 shares of T-Mobile common stock (the “SoftBank Specified Shares”) were contingently issuable from the Sprint Merger date of April 1, 2020. The SoftBank Specified Shares was determined to be contingent consideration for the Sprint Merger and was not dilutive until the defined volume-weighted average price per share was reached. The issuance of the SoftBank Specified Shares was contingent on the trailing 45-trading day volume-weighted average (“VWAP”) per share of T-Mobile common stock on the NASDAQ Global Select Market being equal to or greater than $150.00 (the “Threshold Price”), at any time during the period commencing on April 1, 2022, and ending on December 31, 2025 (the “Measurement Period”). In accordance with the terms of the Letter Agreement, the Threshold Price was subject to downward adjustment by the per share amount of any cash dividends or other cash distributions declared or paid on our common stock during the Measurement Period. As of the close of trading on December 22, 2023, the 45-trading day VWAP exceeded $149.35, the then-current Threshold Price, and the Company delivered the SoftBank Specified Shares to SoftBank in accordance with the Letter Agreement on December 28, 2023, by reissuing Company treasury shares. Upon reissuance of treasury shares, the Company recorded a reclassification from Treasury shares to Additional paid-in capital of $6.9 billion, calculated based on the cost of treasury shares reissued. The SoftBank Specified Shares issued are included in the calculation of basic and diluted weighted-average shares outstanding from the date the contingency associated with the issuance of the SoftBank Specified Shares was resolved and the beginning of the Company’s fourth quarter of 2023, respectively.
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Leases |
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| Leases | Note 17 – Leases Lessee We are a lessee for non-cancelable operating and financing leases for cell sites, switch sites, retail stores, network equipment and office facilities with contractual terms that generally extend through 2040. The majority of cell site leases have a non-cancelable term of to 15 years with several renewal options that can extend the lease term for to 50 years. In addition, we have financing leases for network equipment that generally have a non-cancelable lease term of to five years. The financing leases do not have renewal options and contain a bargain purchase option at the end of the lease. The components of lease expense were as follows:
Information relating to the lease term and discount rate is as follows:
Maturities of lease liabilities as of December 31, 2025, were as follows:
Interest payments for financing leases were $126 million, $111 million and $79 million for the years ended December 31, 2025, 2024 and 2023, respectively. As of December 31, 2025, we have additional operating leases for commercial properties that have not yet commenced with future lease payments of approximately $38 million. As of December 31, 2025, we were contingently liable for future ground lease payments related to certain tower obligations. These contingent obligations are not included in the above table as the amounts owed are contractually owed by CCI based on the subleasing arrangement. See Note 10 – Tower Obligations for further information. On the UScellular Acquisition Date, we entered into a master license agreement to lease space on at least 2,100 towers being retained by UScellular and extended our tenancy term on approximately 600 additional towers where we are already leasing space from UScellular for 15 years post-closing. In addition, through the master license agreement, we leased space on approximately 1,800 additional UScellular towers on an interim basis for up to 30 months after the UScellular Acquisition Date. As a result of entering into the master license agreement, we recorded right-of use assets and lease liabilities of $1.0 billion each on the UScellular Acquisition Date, with a corresponding increase to both deferred tax liabilities and assets of $261 million.
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| Leases | Note 17 – Leases Lessee We are a lessee for non-cancelable operating and financing leases for cell sites, switch sites, retail stores, network equipment and office facilities with contractual terms that generally extend through 2040. The majority of cell site leases have a non-cancelable term of to 15 years with several renewal options that can extend the lease term for to 50 years. In addition, we have financing leases for network equipment that generally have a non-cancelable lease term of to five years. The financing leases do not have renewal options and contain a bargain purchase option at the end of the lease. The components of lease expense were as follows:
Information relating to the lease term and discount rate is as follows:
Maturities of lease liabilities as of December 31, 2025, were as follows:
Interest payments for financing leases were $126 million, $111 million and $79 million for the years ended December 31, 2025, 2024 and 2023, respectively. As of December 31, 2025, we have additional operating leases for commercial properties that have not yet commenced with future lease payments of approximately $38 million. As of December 31, 2025, we were contingently liable for future ground lease payments related to certain tower obligations. These contingent obligations are not included in the above table as the amounts owed are contractually owed by CCI based on the subleasing arrangement. See Note 10 – Tower Obligations for further information. On the UScellular Acquisition Date, we entered into a master license agreement to lease space on at least 2,100 towers being retained by UScellular and extended our tenancy term on approximately 600 additional towers where we are already leasing space from UScellular for 15 years post-closing. In addition, through the master license agreement, we leased space on approximately 1,800 additional UScellular towers on an interim basis for up to 30 months after the UScellular Acquisition Date. As a result of entering into the master license agreement, we recorded right-of use assets and lease liabilities of $1.0 billion each on the UScellular Acquisition Date, with a corresponding increase to both deferred tax liabilities and assets of $261 million.
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Commitments and Contingencies |
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| Commitments and Contingencies Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Commitments and Contingencies | Note 18 – Commitments and Contingencies Purchase Commitments We have commitments for non-dedicated transportation lines with varying expiration terms that generally extend through 2038. In addition, we have commitments to purchase wireless devices, network services, equipment, software, marketing sponsorship agreements and other items in the ordinary course of business, with various terms through 2045. The following table summarizes the timing of such purchase commitments as of December 31, 2025:
(1) These amounts are not reflective of our entire anticipated purchases under the related agreements but are determined based on the non-cancelable quantities or termination amounts to which we are contractually obligated. On April 24, 2024, we entered into a definitive agreement with a fund operated by EQT, Fund VI, to establish a joint venture between us and Fund VI to acquire Lumos, a fiber-to-the-home platform, from EQT’s predecessor fund, EQT Infrastructure III. On April 1, 2025, we completed the joint acquisition of Lumos. Pursuant to the definitive agreement, we expect to make an additional capital contribution of approximately $500 million between 2027 and 2028 under the existing business plan. The additional capital contribution is excluded from our reported purchase commitments above. See Note 3 – Joint Ventures for additional details. Spectrum We lease spectrum from various parties. These leases include service obligations to the lessors. Certain spectrum leases provide for minimum lease payments, additional charges, renewal options and escalation clauses. Leased spectrum agreements have varying expiration terms that generally extend through 2050. We expect that all renewal periods in our spectrum leases will be exercised by us. Certain spectrum leases also include purchase options and right-of-first refusal clauses in which we are provided the opportunity to exercise our purchase option if the lessor receives a purchase offer from a third party. The purchase of the leased spectrum is at our option and, therefore, the option price is not included in the commitments below. The following table summarizes the timing of spectrum lease and service credit commitments, including renewal periods as of December 31, 2025:
On September 12, 2023, we entered into a License Purchase Agreement with Comcast pursuant to which we will acquire spectrum in the 600 MHz band from Comcast in exchange for total cash consideration of between $1.2 billion and $3.3 billion, subject to an application for FCC approval. The licenses are subject to an exclusive leasing arrangement between us and Comcast entered into contemporaneously with the License Purchase Agreement. On January 13, 2025, we and Comcast entered into an amendment to the License Purchase Agreement pursuant to which we will acquire additional spectrum. Subsequent to the amendment, the total cash consideration for the transaction is between $1.2 billion and $3.4 billion. The agreement remains subject to an application for FCC approval and is excluded from our reported purchase commitments above. See Note 7 – Goodwill, Spectrum License Transactions and Other Intangible Assets for additional details. Sprint Merger Commitments In connection with the regulatory proceedings and approvals of the Sprint Merger pursuant to the Business Combination Agreement with Sprint and the other parties named therein (as amended, the “Business Combination Agreement”) and the other transactions contemplated by the Business Combination Agreement, we have commitments and other obligations to various state and federal agencies and certain nongovernmental organizations, including pursuant to the Consent Decree agreed to by us, DT, Sprint, SoftBank and DISH and entered by the U.S. District Court for the District of Columbia, and the FCC’s memorandum opinion and order approving our applications for approval of the Sprint Merger. These commitments and obligations include, among other things, extensive 5G network build-out commitments, obligations to deliver high-speed wireless services to the vast majority of Americans, including Americans residing in rural areas, the marketing of an in-home broadband product where spectrum capacity is available and national security commitments. Many of the commitments specify time frames for compliance and reporting. Failure to fulfill our obligations and commitments in a timely manner could result in substantial fines, penalties, or other legal and administrative actions. Contingencies and Litigation Litigation and Regulatory Matters We are involved in various lawsuits and disputes, claims, government agency investigations and enforcement actions, and other proceedings (“Litigation and Regulatory Matters”) that arise in the ordinary course of business, which include claims of patent infringement (most of which are asserted by non-practicing entities primarily seeking monetary damages), class actions, and proceedings to enforce FCC or other government agency rules and regulations. Those Litigation and Regulatory Matters are at various stages, and some of them may proceed to trial, arbitration, hearing, or other adjudication that could result in fines, penalties, or awards of monetary or injunctive relief in the coming 12 months if they are not otherwise resolved. We have established an accrual with respect to certain of these matters, where appropriate. The accruals are reflected on our consolidated financial statements, but they are not considered to be, individually or in the aggregate, material. An accrual is established when we believe it is both probable that a loss has been incurred and an amount can be reasonably estimated. For other matters, where we have not determined that a loss is probable or because the amount of loss cannot be reasonably estimated, we have not recorded an accrual due to various factors typical in contested proceedings, including, but not limited to, uncertainty concerning legal theories and their resolution by courts or regulators, uncertain damage theories and demands, and a less than fully developed factual record. For Litigation and Regulatory Matters that may result in a contingent gain, we recognize such gains on our consolidated financial statements when the gain is realized or realizable. We recognize legal costs expected to be incurred in connection with Litigation and Regulatory Matters as they are incurred. Except as otherwise specified below, we do not expect that the ultimate resolution of these Litigation and Regulatory Matters, individually or in the aggregate, will have a material adverse effect on our financial position, but we note that an unfavorable outcome of some or all of the specific matters identified below, or other matters that we are or may become involved in could have a material adverse impact on results of operations or cash flows for a particular period. This assessment is based on our current understanding of relevant facts and circumstances. As such, our view of these matters is subject to inherent uncertainties and may change in the future. On February 28, 2020, T-Mobile and Sprint each received a Notice of Apparent Liability for Forfeiture and Admonishment from the FCC, which proposed a penalty for allegedly violating section 222 of the Communications Act and the FCC’s regulations governing the privacy of customer information. On April 29, 2024, the FCC issued Forfeiture Orders against T-Mobile and Sprint that largely adopted the allegations and conclusions of the Notices of Apparent Liability and imposed penalties on T-Mobile and Sprint. T-Mobile and Sprint paid those penalties under protest, and on June 27, 2024, T-Mobile and Sprint filed Petitions for Review challenging the FCC’s Forfeiture Orders in the United States Court of Appeals for the District of Columbia. On August 15, 2025, a panel of three judges denied the petitions for review. On January 23, 2026, the Court of Appeals denied T-Mobile’s petitions for rehearing and rehearing en banc. T-Mobile intends to file a petition for a writ of certiorari with the United States Supreme Court. We are unable to predict the potential outcome of those proceedings. On April 1, 2020, in connection with the closing of the Sprint Merger, we assumed the contingencies and litigation matters of Sprint. Those matters include a wide variety of disputes, claims, government agency investigations and enforcement actions, and other proceedings. On June 1, 2021, a putative shareholder class action and derivative lawsuit was filed in the Delaware Court of Chancery, Dinkevich v. Deutsche Telekom AG, et al., Case No. C.A. No. 2021-0479, against DT, SoftBank and certain of our current and former officers and directors, asserting breach of fiduciary duty claims relating to the repricing amendment to the Business Combination Agreement and to SoftBank’s monetization of its T-Mobile shares. We are also named as a nominal defendant in the case. We are unable to predict the potential outcome of these claims. On August 12, 2021, we became aware of a cybersecurity issue involving unauthorized access to T-Mobile’s systems (the “August 2021 cyberattack”). Our investigation uncovered that the perpetrator had illegally gained access to certain areas of our systems on or about March 18, 2021, but only gained access to and took data of current, former, and prospective customers beginning on or about August 3, 2021. As a result of the August 2021 cyberattack, we have become subject to numerous lawsuits, including mass arbitration claims and multiple class action lawsuits that have been filed in numerous jurisdictions seeking, among other things, unspecified monetary damages, costs and attorneys’ fees arising out of the August 2021 cyberattack. In December 2021, the Judicial Panel on Multidistrict Litigation consolidated the federal class action lawsuits in the U.S. District Court for the Western District of Missouri under the caption In re: T-Mobile Customer Data Security Breach Litigation, Case No. 21-md-3019-BCW. On July 22, 2022, we entered into an agreement to settle the lawsuit. On June 29, 2023, the Court issued an order granting final approval of the settlement. All appeals have been resolved, and the settlement is now final. Under the terms of the settlement, we have paid an aggregate of $350 million to fund claims submitted by class members, the legal fees of plaintiffs’ counsel and the costs of administering the settlement. As required under the terms of the settlement, we have spent an aggregate of $150 million for data security and related technology in 2022 and 2023. The settlement provides a full release of all claims arising out of the August 2021 cyberattack by class members who did not opt out, against all defendants, including us, our subsidiaries and affiliates, and our directors and officers. The settlement contains no admission of liability, wrongdoing or responsibility by any of the defendants. We anticipate that this settlement of the class action, along with other settlements of separate consumer claims that have been previously completed or are currently pending, will resolve substantially all of the claims brought to date by our current, former and prospective customers who were impacted by the 2021 cyberattack. In connection with the class action settlement and the separate settlements, we recorded a total pre-tax charge of approximately $400 million in the second quarter of 2022. During the years ended December 31, 2024 and 2023, we recognized $105 million and $50 million, respectively, in reimbursements from insurance carriers for costs incurred related to the August 2021 cyberattack, which is included as a reduction to Selling, general and administrative expenses on our Consolidated Statements of Comprehensive Income. There were no reimbursements recognized during the year ended December 31, 2025. We have also received inquiries and contested legal proceedings from various government agencies, law enforcement and other governmental authorities related to the August 2021 cyberattack, which could result in substantial fines or penalties. We reached an agreement with the FCC, which was announced on September 30, 2024, to resolve one of those inquiries. We will continue to cooperate fully with the other agencies and regulators inquiring about the matter with an aim to resolve all of these matters. While we hope to resolve them in the near term, we cannot predict the timing or outcome of any of these matters or whether we may be subject to further regulatory inquiries, investigations, or enforcement actions. In light of the inherent uncertainties involved in such matters, and based on the information currently available to us, in addition to the previously recorded pre-tax charge of approximately $400 million noted above, we believe it is reasonably possible that we could incur additional losses associated with these proceedings and inquiries, and we will continue to evaluate information as it becomes known and will record an estimate for losses at the time or times when it is both probable that a loss has been incurred and the amount of the loss is reasonably estimable. Ongoing legal and other costs related to these proceedings and inquiries, as well as any potential future actions, may be substantial, and losses associated with any adverse judgments, settlements, penalties or other resolutions of such proceedings and inquiries could be material to our business, reputation, financial condition, cash flows and operating results. On June 17, 2022, plaintiffs filed a putative antitrust class action complaint in the Northern District of Illinois, Dale, et al. v. Deutsche Telekom AG, et al., Case No. 1:22-cv-03189, against DT, T-Mobile, and SoftBank, alleging that the Sprint Merger violated the antitrust laws and harmed competition in the U.S. retail cell service market. Plaintiffs seek injunctive relief and trebled monetary damages on behalf of a purported class of AT&T and Verizon customers whom plaintiffs allege paid artificially inflated prices due to the Sprint Merger. We are vigorously defending this lawsuit, but we are unable to predict the potential outcome. On January 5, 2023, we identified that a bad actor was obtaining data through a single Application Programming Interface (“API”) without authorization. Based on our investigation, the impacted API is only able to provide a limited set of customer account data, including name, billing address, email, phone number, date of birth, T-Mobile account number and information, such as the number of lines on the account and plan features. The result from our investigation indicates that the bad actor(s) obtained data from this API for approximately 37 million current postpaid and prepaid customer accounts, though many of these accounts did not include the full data set. We believe that the bad actor first retrieved data through the impacted API starting on or around November 25, 2022. We have notified individuals whose information was impacted consistent with state and federal requirements. In connection with the January 2023 cyberattack, we became subject to consumer class actions and regulatory inquiries, to which we will continue to respond in due course and may incur significant expenses. However, we cannot predict the timing or outcome of any of these potential matters or whether we may be subject to additional legal proceedings, claims, regulatory inquiries, investigations, or enforcement actions. On February 25, 2025, a purported Company shareholder filed a putative class action and derivative lawsuit in the Delaware Court of Chancery under the caption Palkon v. Deutsche Telekom AG, et al., Case No. 2025-0211-PAF, against four DT entities, our current directors, and certain of our former directors, asserting breach of fiduciary duty and unjust enrichment claims relating to our 2022 Stock Repurchase Program and our 2023-2024 Stockholder Return Program. We are also named as a nominal defendant in the lawsuit. We are unable to predict the potential outcome of these claims.
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Restructuring Costs |
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| Restructuring and Related Activities [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Restructuring Costs | Note 19 – Restructuring Costs UScellular Acquisition Restructuring Initiatives Upon completing the UScellular Acquisition on August 1, 2025, we began implementing restructuring initiatives to realize cost efficiencies and eliminate redundancies. The major activities associated with the UScellular Acquisition restructuring initiatives will include contract termination costs associated with the rationalization of retail stores, distribution channels, duplicative network and backhaul services and other agreements, severance costs associated with the integration of redundant processes and functions and the decommissioning of certain cell sites and distributed antenna systems to achieve synergies in network costs. The following table summarizes the expenses incurred in connection with our UScellular Acquisition restructuring initiatives for the year ended December 31, 2025:
The expenses associated with our UScellular Acquisition restructuring initiatives are included in Cost of services and Selling, general and administrative expenses on our Consolidated Statements of Comprehensive Income. The changes in the liabilities associated with our UScellular Acquisition restructuring initiatives, including expenses incurred and cash payments, are as follows:
(1) Non-cash items primarily consist of the write-off of assets within Network decommissioning. The liabilities accrued in connection with our UScellular Acquisition restructuring initiatives are presented in Accounts payable and accrued liabilities on our Consolidated Balance Sheets. Our UScellular Acquisition restructuring activities are expected to occur over the next two years with substantially all costs incurred by the end of fiscal year 2027. We are evaluating additional restructuring initiatives associated with the UScellular Acquisition, which are dependent on consultations and negotiations with certain counterparties and the expected impact on our business operations, which could affect the amount or timing of the restructuring costs and related payments. Network Restructuring Initiative Recent technological advancements have enhanced our Customer-Driven Coverage insights, enabling us to identify, assess and shut down low customer value sites. In the fourth quarter of 2025, we began implementing restructuring initiatives to identify and realize these cost savings on our network, excluding activities associated with the UScellular Acquisition (the “Network Restructuring Initiative”). The major activities associated with the Network Restructuring Initiative include the rationalization of network and backhaul services and the decommissioning of cell sites and distributed antenna systems to reduce our overall network cost. The following table summarizes the expenses incurred in connection with our Network Restructuring Initiative for the year ended December 31, 2025:
The expenses associated with our Network Restructuring Initiative are included in Cost of services on our Consolidated Statements of Comprehensive Income. Our Network Restructuring Initiative also includes the termination of certain of our operating leases for cell sites and switch sites. Incremental expenses associated with terminated leases and leases for which we have recognized accelerated lease expense were $24 million for the year ended December 31, 2025, and are included in Cost of services on our Consolidated Statements of Comprehensive Income. Additionally, we recognized $97 million of accelerated depreciation for the year ended December 31, 2025, related to assets associated with the decommissioning of cell sites, which is included in Depreciation and amortization on our Consolidated Statements of Comprehensive Income. The changes in the liabilities associated with our Network Restructuring Initiative, including expenses incurred and cash payments, are as follows:
(1) Non-cash items primarily consist of the write-off of assets within Network decommissioning The liabilities accrued in connection with our Network Restructuring Initiative are presented in Accounts payable and accrued liabilities on our Consolidated Balance Sheets. Our Network Restructuring Initiative is expected to occur over the next two years with a majority of costs incurred by the end of fiscal year 2026. We are evaluating additional restructuring activities associated with the Network Restructuring Initiative, which are dependent on consultations and negotiations with certain counterparties and the expected impact on our business operations, which could affect the amount or timing of the restructuring costs and related payments. 2025 Workforce Transformation In the fourth quarter of 2025, we began implementing a restructuring initiative to streamline operations by centralizing leaders and teams, reducing organizational layers and eliminating duplicative roles (the “2025 Workforce Transformation”). We recorded a pre-tax charge of $390 million during the year ended December 31, 2025, related to the 2025 Workforce Transformation, which is included in Cost of services and Selling, general and administrative expenses on our Consolidated Statements of Comprehensive Income. The changes in the liabilities associated with our 2025 Workforce Transformation initiative, including expenses incurred and cash payments, are as follows:
The liabilities accrued in connection with our 2025 Workforce Transformation initiative are presented in Accounts payable and accrued liabilities on our Consolidated Balance Sheets. We have incurred a majority of the costs associated with our 2025 Workforce Transformation initiative, with the remaining costs expected to be substantially incurred by the end of the first quarter of 2026. We expect substantially all associated employee separations and related cash outflows to occur in 2026. Sprint Merger Restructuring Initiatives Upon closing the Sprint Merger in April 2020, we began implementing restructuring initiatives to realize cost efficiencies and reduce redundancies. The major activities associated with the Sprint Merger restructuring initiatives included contract termination costs associated with the rationalization of retail stores, distribution channels, duplicative network and backhaul services and other agreements, severance costs associated with the integration of redundant processes and functions and the decommissioning of certain small cell sites and distributed antenna systems to achieve Sprint Merger synergies in network costs. As of June 30, 2024, we have incurred substantially all restructuring and integration costs associated with the Sprint Merger and, accordingly, no longer separately disclose Sprint Merger-related costs. The cash payments for the Sprint Merger-related costs incurred extend beyond 2025. The following table summarizes the expenses incurred in connection with our Sprint Merger restructuring initiatives:
The expenses associated with our Sprint Merger restructuring initiatives are included in Cost of services and Selling, general and administrative expenses on our Consolidated Statements of Comprehensive Income. Our Sprint Merger restructuring initiatives also included the acceleration or termination of certain of our operating and financing leases for cell sites, switch sites, retail stores, network equipment and office facilities. Incremental expenses associated with terminated leases and leases for which we have recognized accelerated lease expense were $91 million and $390 million for the years ended December 31, 2024 and 2023, respectively, and are included in Cost of services and Selling, general and administrative expenses on our Consolidated Statements of Comprehensive Income. 2023 Workforce Reduction In August 2023, we implemented an initiative to reduce the size of our workforce by approximately 5,000 positions, just under 7% of our total employee base, primarily in corporate and back-office functions, and some technology roles (the “2023 Workforce Reduction”). The following table summarizes the expenses incurred in connection with the 2023 Workforce Reduction initiatives:
The expenses associated with the 2023 Workforce Reduction initiatives are included in Cost of services and Selling, general and administrative expenses on our Consolidated Statements of Comprehensive Income.
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Additional Financial Information |
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| Supplemental Financial Statement Elements [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Additional Financial Information | Note 20 – Additional Financial Information Accounts Payable and Accrued Liabilities Accounts payable and accrued liabilities are summarized as follows:
Book overdrafts included in Accounts payable were $823 million and $460 million as of December 31, 2025 and 2024, respectively. Related Person Transactions We have related person transactions associated with DT, SoftBank (through August 6, 2025, the date SoftBank ceased to be a related person) or their respective affiliates in the ordinary course of business, including intercompany servicing and licensing. The following table summarizes the impact of significant transactions with DT or its affiliates included in Operating expenses in the Consolidated Statements of Comprehensive Income:
We have an agreement with DT for the reimbursement of certain administrative expenses, which was $5 million for the year ended December 31, 2025, and $4 million for each of the years ended December 31, 2024 and 2023. During the years ended December 31, 2025 and 2024, we paid an aggregate of $4.1 billion and $3.3 billion in cash dividends to our stockholders, of which $2.1 billion and $1.7 billion was paid to DT, respectively. See Note 15 - Stockholder Return Programs for further information. Supplemental Consolidated Statements of Cash Flows Information The following table summarizes T-Mobile’s supplemental cash flow information:
Cash and Cash Equivalents, Including Restricted Cash Cash and cash equivalents, including restricted cash, presented on our Consolidated Statements of Cash Flows were included on our Consolidated Balance Sheets as follows:
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Subsequent Events |
12 Months Ended |
|---|---|
Dec. 31, 2025 | |
| Subsequent Events [Abstract] | |
| Subsequent Events | Note 21 – Subsequent Events On January 5, 2026, we entered into a Second Amended and Restated Credit Agreement. See Note 9 – Debt for additional information. On January 12, 2026, we issued $1.2 billion of 5.000% Senior Notes due 2036 and $850 million of 5.850% Senior Notes due 2056. On January 22, 2026, we delivered notices of redemption on $3.0 billion aggregate principal amount of our 4.750% Senior Notes due 2028 and 4.750% Senior Notes to affiliates due 2028. We redeemed the notes at par on February 1, 2026. On February 5, 2026, we entered into a master receivables financing agreement and borrowed $1.0 billion, maturing on February 5, 2027. See Note 9 – Debt for additional information. From January 1, 2026, through February 6, 2026, we repurchased 5,106,691 shares of our common stock at an average price per share of $192.61 for a total purchase price of $984 million. See Note 15 - Stockholder Return Programs for additional information.
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Insider Trading Arrangements |
3 Months Ended |
|---|---|
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Dec. 31, 2025
shares
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| Trading Arrangements, by Individual | |
| Non-Rule 10b5-1 Arrangement Adopted | false |
| Rule 10b5-1 Arrangement Terminated | false |
| Non-Rule 10b5-1 Arrangement Terminated | false |
| Marcelo Claure [Member] | |
| Trading Arrangements, by Individual | |
| Material Terms of Trading Arrangement | On December 2, 2025, Claure Mobile LLC, an entity affiliated with Marcelo Claure, a director of the Company, adopted a trading plan intended to satisfy the affirmative defense of Rule 10b5-1(c) to sell, subject to certain conditions, up to 1,250,000 shares of the Company’s common stock. The duration of this trading plan is 376 days.
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| Name | Marcelo Claure |
| Title | director |
| Rule 10b5-1 Arrangement Adopted | true |
| Adoption Date | December 2, 2025 |
| Arrangement Duration | 376 days |
| Aggregate Available | 1,250,000 |
| Michael J. Katz [Member] | |
| Trading Arrangements, by Individual | |
| Material Terms of Trading Arrangement | On December 4, 2025, Michael J. Katz, the Company’s Chief Business and Product Officer, adopted a trading plan intended to satisfy the affirmative defense of Rule 10b5-1(c) to sell, subject to certain conditions, up to 15,000 shares of the Company’s common stock. The duration of this trading plan is 393 days.
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| Name | Michael J. Katz |
| Title | Chief Business and Product Officer |
| Rule 10b5-1 Arrangement Adopted | true |
| Adoption Date | December 4, 2025 |
| Arrangement Duration | 393 days |
| Aggregate Available | 15,000 |
Insider Trading Policies and Procedures |
12 Months Ended |
|---|---|
Dec. 31, 2025 | |
| Insider Trading Policies and Procedures [Line Items] | |
| Insider Trading Policies and Procedures Adopted | true |
Cybersecurity Risk Management and Strategy Disclosure |
12 Months Ended |
|---|---|
Dec. 31, 2025 | |
| Cybersecurity Risk Management, Strategy, and Governance [Line Items] | |
| Cybersecurity Risk Management Processes for Assessing, Identifying, and Managing Threats [Text Block] | Our Cybersecurity Approach and Integration We have implemented processes for overseeing and identifying material risks from cybersecurity threats, and our cybersecurity processes are integrated into the Company’s overall risk management system and processes. As part of management’s oversight of cybersecurity, Mark Clancy, our Senior Vice President, Cybersecurity, presents on our cybersecurity practices to the Nominating, Corporate Governance and Compliance Committee of our Board of Directors (the “NCGC Committee”) and to our full Board of Directors on a periodic basis. Our Chief Audit Executive periodically presents enterprise risks, including cybersecurity risks, to the Audit Committee of our Board of Directors (the “Audit Committee”). Our Chief Compliance Officer regularly attends meetings of the NCGC Committee to provide insights from the compliance perspective relating to cybersecurity. Cyber risk management is a core component of the Company's governance structure. We utilize the National Institute of Standards and Technology’s Cybersecurity Framework as a guide in cyber risk management to identify, assess, and assist cybersecurity leadership in managing cybersecurity risks. Cyber risk management encompasses partnerships among teams that are responsible for cyber governance, prevention, detection, and remediation activities within the Company’s cybersecurity environment. As part of our cyber risk management efforts, we conduct periodic reviews and collaborate with enterprise-wide risk assessments to assess and manage cybersecurity risks. Our cybersecurity team also provides enterprise-wide cybersecurity training for employees to continuously improve our mitigation against human-driven vulnerabilities. Our management also conducts a quarterly enterprise-wide risk assessment that considers a wide spectrum of risks facing the Company, including cybersecurity. Through these quarterly risk assessments, management informs the Audit Committee of the cyber risk landscape facing the Company and the Company’s preparedness to manage such risk. The enterprise-wide risk assessment is a top-down risk assessment that leverages the assessments performed by cyber risk management. Engagement with External Experts The Company engages top-tier external cybersecurity firms, as needed, leveraging their expertise as part of our ongoing effort to evaluate and enhance our cybersecurity program. They help with cyber defense capabilities (including staff enhancement of certain functions) and transformation to mitigate associated threats, reduce risk, enhance our cybersecurity posture, and meet the Company's evolving needs. Oversight of Third-Party Service Providers Our third-party risk management program includes processes for identifying and managing material cybersecurity risks arising from third-party providers. Our third-party risk management program actively engages with the enterprise-wide risk assessment process and partners with cyber risk management to report relevant risks to the NCGC Committee, the Audit Committee and our internal Enterprise Risk & Compliance Committee. Our third-party risk management program includes cybersecurity as an aspect of its risk assessment of third parties with the objective that key risks are identified and addressed. Moreover, the program also considers risks associated with certain fourth parties, entities that are partners or subcontractors of our direct third-party vendors, through assessments carried out by our third-party service providers. Cybersecurity Incident Impact As previously disclosed, in August 2021, we experienced a cybersecurity incident that resulted in numerous lawsuits, including mass arbitration claims and multiple class action lawsuits. In January 2023, we experienced another cybersecurity incident that also resulted in consumer class actions and regulatory inquiries. Legal and other costs related to these proceedings and inquiries, as well as any potential future actions, may be substantial, and losses associated with any adverse judgments, settlements, penalties or other resolutions of such proceedings and inquiries could be material to our business, reputation, financial condition, cash flows and operating results. For additional details regarding the impact of both cybersecurity incidents, see Note 18 – Commitments and Contingencies of the Notes to the Consolidated Financial Statements. We have not identified other known risks from previous cybersecurity threats that have materially affected or are reasonably likely to materially affect us. However, we face ongoing risks from certain cybersecurity threats that, if realized, are reasonably likely to materially affect business strategy, financial condition or operating results. See “Risk Factors – We have experienced cyberattacks and could in the future be further harmed by disruption, data loss or other security breaches, whether directly or indirectly through third parties whose products and services we rely on in operating our business.”
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| Cybersecurity Risk Management Processes Integrated [Flag] | true |
| Cybersecurity Risk Management Processes Integrated [Text Block] | We have implemented processes for overseeing and identifying material risks from cybersecurity threats, and our cybersecurity processes are integrated into the Company’s overall risk management system and processes. |
| Cybersecurity Risk Management Third Party Engaged [Flag] | true |
| Cybersecurity Risk Third Party Oversight and Identification Processes [Flag] | true |
| Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Flag] | false |
| Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Text Block] | As previously disclosed, in August 2021, we experienced a cybersecurity incident that resulted in numerous lawsuits, including mass arbitration claims and multiple class action lawsuits. In January 2023, we experienced another cybersecurity incident that also resulted in consumer class actions and regulatory inquiries. |
| Cybersecurity Risk Board of Directors Oversight [Text Block] | Disclosure of Management’s Responsibilities Chief Information Officer The Chief Information Officer is responsible for overseeing the Company’s information technology systems, digital capabilities, and cybersecurity practices. Mark Clancy, our Senior Vice President, Cybersecurity, under the direction of the Chief Information Officer, is responsible for overseeing the cybersecurity organization and promoting a security-centric culture throughout our business and operational functions. The Senior Vice President, Cybersecurity, is at the forefront of enhancing our cybersecurity framework and strengthening the overall cybersecurity program. This involves upgrading tools and capabilities, which are part of a broader, multi-year strategy to continue to enhance security measures. The Senior Vice President, Cybersecurity, oversees the cyber risk management function, which identifies cybersecurity threats, assesses cybersecurity risks and supports the Chief Information Officer and the Company in managing such risks. As the Company’s Chief Information Officer, Jeff Simon has extensive experience in risk management and information security, including serving as the Chief Information Security Officer at Fidelity National Information Services, Inc. Mr. Simon received his Master of Science in Computer Science, Software Engineering & Artificial Intelligence from the Johns Hopkins Whiting School of Engineering and Bachelor of Science in Business Administration and Applied Economics from Marquette University. Mr. Simon is a Certified Information Systems Security Professional. As the Company’s Senior Vice President, Cybersecurity, Mark Clancy has over 25 years of experience in information technology, information security, and cybersecurity, including serving as the Chief Information and Security Officer and Vice President of Cybersecurity and Fraud at Sprint Corporation. Mr. Clancy received his Bachelor of Science in Electrical and Electronics Engineering from Drexel University. Enterprise Risk & Compliance Committee Our Enterprise Risk & Compliance Committee is comprised of a collective of senior management representatives and subject matter experts from across the Company. The Enterprise Risk & Compliance Committee is chaired by the Chief Financial Officer of the Company, with the Chief Legal Officer and General Counsel as the co-chair and comprises core members including the Chief Information Officer, while the Senior Vice President, Cybersecurity, serves in an advisory capacity. The purpose of the Enterprise Risk & Compliance Committee is to oversee and govern the Company’s risk management, environmental, social, corporate governance, cybersecurity, and operational compliance activities, as well as provide a means of bringing risk issues to the attention of management. Specific to cybersecurity, the Chief Information Officer and the Senior Vice President, Cybersecurity, have the expertise to provide insights into the nature of cyber threats, the Company’s readiness, and actions taken to mitigate such risks. Disclosure of the Board’s Roles and Responsibilities Our Board of Directors oversees risks from cybersecurity threats using a multi-faceted approach that involves the NCGC Committee and Audit Committee and various executive roles. Additionally, our Chief Information Officer and Senior Vice President, Cybersecurity, report on cybersecurity to the full Board. Nominating, Corporate Governance and Compliance Committee The NCGC Committee oversees risks associated with data privacy and information security, which encompasses cybersecurity. Our Senior Vice President, Cybersecurity, and Chief Compliance Officer, among other executives, provide periodic reports to the NCGC Committee and also meet with the NCGC Committee to discuss any material events when they arise. The periodic reports are designed to keep the NCGC Committee abreast of the Company’s cybersecurity practices, risks and trends in cybersecurity threats. The NCGC Committee also has discussions with management focused on evaluating the Company’s exposure to cybersecurity risks and cybersecurity practices in place to mitigate such risks. These discussions enable the NCGC Committee to be informed of the steps management is taking to detect, monitor and manage cybersecurity risks. These reports to the NCGC Committee typically include information on any significant incidents that have occurred, how they were managed, and any changes to the risk profile of the Company. The NCGC Committee seeks updates to facilitate proactive governance and to allow the NCGC Committee to address emerging cybersecurity issues with management. Audit Committee The Audit Committee is integral to overseeing the Company’s overall risk management strategies, including cybersecurity risks and disclosures. To keep the Audit Committee informed, the Chief Audit Executive maintains a direct and open communication channel with the Audit Committee. Regular meetings are held for the Chief Audit Executive to report to the Audit Committee. These include an enterprise-wide risk assessment that highlights cybersecurity risks and cybersecurity risk mitigation actions. Additionally, the Audit Committee receives updates on significant incidents and cybersecurity risks that have been presented to or discussed with the Enterprise Risk & Compliance Committee.
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| Cybersecurity Risk Board Committee or Subcommittee Responsible for Oversight [Text Block] | The Audit Committee is integral to overseeing the Company’s overall risk management strategies, including cybersecurity risks and disclosures. |
| Cybersecurity Risk Process for Informing Board Committee or Subcommittee Responsible for Oversight [Text Block] | As part of management’s oversight of cybersecurity, Mark Clancy, our Senior Vice President, Cybersecurity, presents on our cybersecurity practices to the Nominating, Corporate Governance and Compliance Committee of our Board of Directors (the “NCGC Committee”) and to our full Board of Directors on a periodic basis. Our Chief Audit Executive periodically presents enterprise risks, including cybersecurity risks, to the Audit Committee of our Board of Directors (the “Audit Committee”). Our Chief Compliance Officer regularly attends meetings of the NCGC Committee to provide insights from the compliance perspective relating to cybersecurity.To keep the Audit Committee informed, the Chief Audit Executive maintains a direct and open communication channel with the Audit Committee. Regular meetings are held for the Chief Audit Executive to report to the Audit Committee. These include an enterprise-wide risk assessment that highlights cybersecurity risks and cybersecurity risk mitigation actions. Additionally, the Audit Committee receives updates on significant incidents and cybersecurity risks that have been presented to or discussed with the Enterprise Risk & Compliance Committee. |
| Cybersecurity Risk Role of Management [Text Block] | Disclosure of the Board’s Roles and Responsibilities Our Board of Directors oversees risks from cybersecurity threats using a multi-faceted approach that involves the NCGC Committee and Audit Committee and various executive roles. Additionally, our Chief Information Officer and Senior Vice President, Cybersecurity, report on cybersecurity to the full Board.
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| Cybersecurity Risk Management Positions or Committees Responsible [Flag] | true |
| Cybersecurity Risk Management Positions or Committees Responsible [Text Block] | , under the direction of the Chief Information Officer, is responsible for overseeing the cybersecurity organization and promoting a security-centric culture throughout our business and operational functions. |
| Cybersecurity Risk Management Expertise of Management Responsible [Text Block] | As the Company’s Chief Information Officer, Jeff Simon has extensive experience in risk management and information security, including serving as the Chief Information Security Officer at Fidelity National Information Services, Inc. Mr. Simon received his Master of Science in Computer Science, Software Engineering & Artificial Intelligence from the Johns Hopkins Whiting School of Engineering and Bachelor of Science in Business Administration and Applied Economics from Marquette University. Mr. Simon is a Certified Information Systems Security Professional. As the Company’s Senior Vice President, Cybersecurity, Mark Clancy has over 25 years of experience in information technology, information security, and cybersecurity, including serving as the Chief Information and Security Officer and Vice President of Cybersecurity and Fraud at Sprint Corporation. Mr. Clancy received his Bachelor of Science in Electrical and Electronics Engineering from Drexel University.
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| Cybersecurity Risk Process for Informing Management or Committees Responsible [Text Block] | Nominating, Corporate Governance and Compliance Committee The NCGC Committee oversees risks associated with data privacy and information security, which encompasses cybersecurity. Our Senior Vice President, Cybersecurity, and Chief Compliance Officer, among other executives, provide periodic reports to the NCGC Committee and also meet with the NCGC Committee to discuss any material events when they arise. The periodic reports are designed to keep the NCGC Committee abreast of the Company’s cybersecurity practices, risks and trends in cybersecurity threats. The NCGC Committee also has discussions with management focused on evaluating the Company’s exposure to cybersecurity risks and cybersecurity practices in place to mitigate such risks. These discussions enable the NCGC Committee to be informed of the steps management is taking to detect, monitor and manage cybersecurity risks. These reports to the NCGC Committee typically include information on any significant incidents that have occurred, how they were managed, and any changes to the risk profile of the Company. The NCGC Committee seeks updates to facilitate proactive governance and to allow the NCGC Committee to address emerging cybersecurity issues with management. Audit Committee The Audit Committee is integral to overseeing the Company’s overall risk management strategies, including cybersecurity risks and disclosures. To keep the Audit Committee informed, the Chief Audit Executive maintains a direct and open communication channel with the Audit Committee. Regular meetings are held for the Chief Audit Executive to report to the Audit Committee. These include an enterprise-wide risk assessment that highlights cybersecurity risks and cybersecurity risk mitigation actions. Additionally, the Audit Committee receives updates on significant incidents and cybersecurity risks that have been presented to or discussed with the Enterprise Risk & Compliance Committee.
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| Cybersecurity Risk Management Positions or Committees Responsible Report to Board [Flag] | true |
Summary of Significant Accounting Policies (Policies) |
12 Months Ended |
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Dec. 31, 2025 | |
| Organization, Consolidation and Presentation of Financial Statements [Abstract] | |
| Consolidation | The accompanying consolidated financial statements include the balances and results of operations of T-Mobile and our consolidated subsidiaries. We consolidate majority-owned subsidiaries over which we exercise control, as well as variable interest entities (“VIEs”) for which we are deemed to be the primary beneficiary and VIEs, which cannot be deconsolidated, such as those related to our Tower obligations as discussed in Note 10 – Tower Obligations. Intercompany transactions and balances have been eliminated in consolidation. Investments in entities that we do not control but have significant influence are accounted for under the equity method. We record our proportionate share of our equity method investees’ earnings (losses) within Other (expense) income, net on our Consolidated Statements of Comprehensive Income. We operate as a single operating segment. The preparation of financial statements in conformity with U.S. generally accepted accounting principles (“GAAP”) requires our management to make estimates and assumptions which affect our consolidated financial statements and accompanying notes. Estimates are based on historical experience, where applicable, and other assumptions which our management believes are reasonable under the circumstances. These estimates are inherently subject to judgment and actual results could differ from those estimates.
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| Basis of Accounting | The preparation of financial statements in conformity with U.S. generally accepted accounting principles (“GAAP”) requires our management to make estimates and assumptions which affect our consolidated financial statements and accompanying notes. |
| Use of Estimates | Estimates are based on historical experience, where applicable, and other assumptions which our management believes are reasonable under the circumstances. These estimates are inherently subject to judgment and actual results could differ from those estimates. |
| Cash and Cash Equivalents | Cash and Cash Equivalents Cash equivalents consist of highly liquid money market funds and U.S. Treasury securities with remaining maturities of three months or less at the date of purchase.
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| Receivables and Related Allowance for Credit Losses | Receivables and Related Allowance for Credit Losses Accounts Receivable Accounts receivable balances are predominantly comprised of amounts currently due from customers (e.g., for wireless communications services), device insurance administrators, wholesale partners, other carriers and third-party retail channels. Accounts receivable are presented on our Consolidated Balance Sheets at their amortized cost basis (i.e., the receivables’ unpaid principal balance (“UPB”) as adjusted for any written-off amounts relating to impairment), net of the allowance for credit losses. We have an arrangement to sell certain of our customer service accounts receivable on a revolving basis, which are treated as sales of financial assets. See Note 5 – Sales of Certain Receivables for further information. Equipment Installment Plan Receivables We offer certain customers the option to pay for their devices and other purchases in installments, generally over a period of 24 months, using an EIP. Installment loans acquired in the UScellular Acquisition (as defined below) are included in EIP receivables and generally have an initial term of 36 months. EIP receivables are presented on our Consolidated Balance Sheets at their amortized cost basis (i.e., the receivables’ UPB as adjusted for any written-off amounts due to impairment and unamortized discounts), net of the allowance for credit losses. At the time of an installment sale, we impute a discount for interest if the term exceeds 12 months as there is no stated rate of interest on the receivables. The receivables are recorded at their present value, which is determined by discounting expected future cash payments at the imputed interest rate. This adjustment results in a discount or reduction in the transaction price of the contract with a customer, which is allocated to the performance obligations of the arrangement such as Service and Equipment revenues on our Consolidated Statements of Comprehensive Income. The imputed discount rate reflects a current market interest rate and includes a component for estimated credit risk underlying the EIP receivable, reflecting the estimated credit worthiness of the customer. The imputed discount on receivables is amortized over the financed installment term using the effective interest method and recognized as Other revenues on our Consolidated Statements of Comprehensive Income. The current portion of the EIP receivables is included in Equipment installment plan receivables, net and the long-term portion of the EIP receivables is included in Equipment installment plan receivables due after one year, net on our Consolidated Balance Sheets. We have an arrangement to sell certain EIP receivables on a revolving basis, which are treated as sales of financial assets. See Note 5 – Sales of Certain Receivables for further information. Additionally, certain of our EIP receivables included on our Consolidated Balance Sheets secure our asset-backed notes (“ABS Notes”). See Note 9 – Debt for further information. Allowance for Credit Losses We maintain an allowance for credit losses by applying an expected credit loss model. Each period, management assesses the appropriateness of the level of allowance for credit losses by considering credit risk inherent within each portfolio segment (i.e., accounts receivable and EIP receivable portfolio segments) as of period end. Each portfolio segment is comprised of pools of receivables that are evaluated collectively based on similar risk characteristics. Our allowance levels consider estimated credit risk over the contractual life of the receivables and are influenced by receivable volumes, receivable delinquency status, historical loss experience and other conditions that affect loss expectations, such as changes in credit and collections policies and forecasts of macroeconomic conditions. While we attribute portions of the allowance to our respective portfolio segments, the entire allowance is available to credit losses related to the total receivable portfolio. We consider a receivable past due and delinquent when a customer has not paid us by the contractually specified payment due date. Account balances are written off against the allowance for credit losses if collection efforts are unsuccessful and the receivable balance is deemed uncollectible (customer default), based on factors such as customer credit ratings as well as the length of time the amounts are past due. If there is a deterioration of our customers’ financial condition or if future actual default rates on receivables in general differ from those currently anticipated, we will adjust our allowance for credit losses accordingly.
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| Inventories | Inventories Inventories consist primarily of wireless devices and accessories, which are valued at the lower of cost or net realizable value. Cost is determined using standard cost, which approximates average cost. Shipping and handling costs paid to wireless device and accessories vendors as well as costs to refurbish used devices are included in the standard cost of inventory. Net realizable value is the estimated selling price in the ordinary course of business, less reasonably predictable costs of disposal and transportation. We record inventory write-downs to net realizable value for obsolete and slow-moving items based on inventory turnover trends and historical experience.
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| Recourse Guarantee and Deferred Purchase Price Assets | Recourse Guarantee Liabilities and Deferred Purchase Price Assets In connection with the sales of certain service and EIP accounts receivable pursuant to the sale arrangements, we have recourse guarantee liabilities, beginning on November 1, 2024, and deferred purchase price assets, prior to November 1, 2024, measured at fair value that are based on a discounted cash flow model using unobservable Level 3 inputs, including estimated customer default rates and credit worthiness.
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| Long-Lived Assets and Property and Equipment | Long-Lived Assets Long-lived assets include assets that do not have indefinite lives, such as property and equipment and certain intangible assets. Property and Equipment Property and equipment consists of buildings and equipment, including certain network server equipment, wireless communications systems, leasehold improvements, capitalized software, leased wireless devices and construction in progress. Wireless communications systems include assets to operate our wireless network and information technology data centers, including tower assets, leasehold improvements and asset retirement costs. Leasehold improvements include asset improvements other than those related to the wireless network. Property and equipment are recorded at cost less accumulated depreciation and impairments, if any, in Property and equipment, net on our Consolidated Balance Sheets. We generally depreciate property and equipment over the period the property and equipment provide economic benefit using the straight-line method. Depreciable life studies are performed periodically to confirm the appropriateness of depreciable lives for certain categories of property and equipment. These studies take into account actual usage, physical wear and tear, replacement history and assumptions about technology evolution. When these factors indicate the useful life of an asset is different from the previous assessment, the remaining book value is depreciated prospectively over the adjusted remaining estimated useful life. Leasehold improvements are depreciated over the shorter of their estimated useful lives or the related lease term. Costs of major replacements and improvements are capitalized. Repair and maintenance expenditures which do not enhance or extend the asset’s useful life are charged to operating expenses as incurred. Construction costs, labor and overhead incurred in the expansion or enhancement of our wireless network are capitalized. Capitalization commences with pre-construction period administrative and technical activities, which include obtaining zoning approvals and building permits, and ceases at the point at which the asset is ready for its intended use. We capitalize interest associated with the acquisition or construction of certain property and equipment. Capitalized interest is reported as a reduction in interest expense and depreciated over the useful life of the related asset.
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| Asset Retirement Obligations | We record an asset retirement obligation for the estimated fair value of legal obligations associated with the retirement of tangible long-lived assets and a corresponding increase in the carrying amount of the related asset in the period in which the obligation is incurred. In periods subsequent to initial measurement, we recognize changes in the liability resulting from the passage of time and revisions to either the timing or the amount of the original estimate. Over time, the liability is accreted to its present value and the capitalized cost is depreciated over the estimated useful life of the asset. Our obligations relate primarily to certain legal obligations to remediate leased property on which our network infrastructure and administrative assets are located.
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| Software Capitalization | We capitalize certain costs incurred in connection with developing or acquiring internal use software. Capitalization of software costs commences once the final selection of the specific software solution has been made and management authorizes and commits to funding the software project and ceases once the project is ready for its intended use. Capitalized software costs are included in Property and equipment, net on our Consolidated Balance Sheets and are amortized on a straight-line basis over the estimated useful life of the asset. Costs incurred during the preliminary project stage, as well as maintenance and training costs, are expensed as incurred.
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| Other Intangible Assets | Other Intangible Assets Intangible assets that do not have indefinite useful lives are amortized over their estimated useful lives. Customer relationships are amortized using the sum-of-the-years digits method. The remaining finite-lived intangible assets are amortized using the straight-line method.
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| Impairment | Impairment We assess potential impairments to our long-lived assets when events or changes in circumstances indicate the carrying amount of the asset may not be recoverable. If any indicators of impairment are present, we test recoverability. The carrying value of a long-lived asset or asset group is not recoverable if the carrying value exceeds the sum of the estimated undiscounted future cash flows expected to be generated from the use and eventual disposition of the asset or asset group. If the estimated undiscounted future cash flows do not exceed the asset or asset group’s carrying amount, then an impairment loss is recorded, measured as the amount by which the carrying amount of a long-lived asset or asset group exceeds its estimated fair value. Impairment We assess the carrying value of our goodwill and other indefinite-lived intangible assets, such as our spectrum license portfolio, for potential impairment annually as of December 31 or more frequently, if events or changes in circumstances indicate such assets might be impaired. We test goodwill on a reporting unit basis by comparing the estimated fair value of the reporting unit to its book value. If the fair value of the reporting unit exceeds the book value, then no impairment is measured. When assessing goodwill for impairment we may elect to first perform a qualitative assessment to determine if the quantitative impairment test is necessary. If we do not perform a qualitative assessment, or if the qualitative assessment indicates it is more likely than not that the fair value of a reporting unit is less than its carrying amount, we perform a quantitative test. We recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value; however, the loss recognized would not exceed the total amount of goodwill allocated to that reporting unit. We employ a qualitative approach to assess our reporting units. The fair value of each reporting unit is determined using both a market approach and an income approach. We utilize market capitalization, discounted cash flow model and a market multiples approach to estimate the fair value of our reporting units. We recognize that the market capitalization of T-Mobile and the trading multiples of the comparable public companies are subject to volatility and will monitor changes in market capitalization and the trading multiples of the comparable public companies to determine whether declines, if any, necessitate an interim impairment review. In the event market capitalization or the indicated value from market multiples of comparable public companies indicate a decline in fair value below the carrying value of each reporting unit, we will consider the length, severity and reasons for the decline when assessing whether potential impairment exists, including considering whether a control premium should be added to the market capitalization. We believe short-term fluctuations in share price may not necessarily reflect the underlying aggregate fair value. No events or changes in circumstances have occurred that indicate the fair value of our reporting units may be below their carrying amount at December 31, 2025. We test our spectrum licenses for impairment on an aggregate basis, consistent with our management of the overall business at a national level. We may elect to first perform a qualitative assessment to determine whether it is more likely than not that the fair value of an intangible asset is less than its carrying value. If we do not perform the qualitative assessment, or if the qualitative assessment indicates it is more likely than not that the fair value of the intangible asset is less than its carrying amount, we calculate the estimated fair value of the intangible asset. If the estimated fair value of the spectrum licenses is lower than their carrying amount, an impairment loss is recognized for the difference. We employ the qualitative method. We estimate fair value of spectrum licenses using the Greenfield methodology and comparable market transactions. The Greenfield methodology values the spectrum licenses by calculating the cash flow generating potential of a hypothetical start-up company that goes into business with no assets except for the asset to be valued (in this case, spectrum licenses) and makes investments required to build an operation comparable to current use. The value of the spectrum licenses is the present value of the cash flows of this hypothetical start-up company. We base the assumptions underlying the Greenfield methodology on a combination of market participant data and our historical results, trends and business plans. Future cash flows in the Greenfield methodology are based on estimates and assumptions of market participant revenues, EBITDA margin, network build-out period and a long-term growth rate for a market participant. The cash flows are discounted using a weighted-average cost of capital. Where market data is available, we also incorporate indicated spectrum license values using a market multiple approach. No events or change in circumstances have occurred that indicate the fair value of the Spectrum licenses may be below their carrying amount at December 31, 2025. The valuation approaches utilized to estimate fair value for the purposes of the impairment tests of goodwill and spectrum licenses may require that management make difficult, subjective and complex judgments about matters that are inherently uncertain. If actual results or future expectations are not consistent with the assumptions used in our estimate of fair value, it may result in the recording of significant impairment charges on goodwill or spectrum licenses. The most significant assumptions within the valuation models are the discount rate based on the weighted-average cost of capital, revenues, EBITDA margins, capital expenditures and long-term growth rate. Impairment For our equity method investments, we perform a qualitative assessment for impairment quarterly or whenever significant events or changes in circumstances indicate that the carrying amount of the investment might not be recoverable. We consider whether impairment indicators exist by evaluating the companies' financial and liquidity position and access to capital resources, among other indicators. If a qualitative assessment indicates that the investment may be impaired, we prepare a quantitative assessment of the fair value of the investment using a market approach or an income approach. In the event the estimated fair value of an investment declines below the carrying value and we determine the decline in fair value is other than temporary, an impairment charge is recorded, measured as the amount by which the carrying amount of the investment exceeds its estimated fair value.
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| Business Combinations | Business Combinations Assets acquired and liabilities assumed as part of a business combination are generally recorded at their fair value at the date of acquisition. The excess of purchase price over the fair value of assets acquired and liabilities assumed is recorded as goodwill. Determining fair value of identifiable assets, particularly intangibles, and liabilities acquired requires management to make estimates, which are based on all available information and in some cases assumptions with respect to the timing and amount of future revenues and expenses associated with an asset or liability. See Note 2 – Business Combinations for further discussion of our acquisitions.
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| Goodwill | Goodwill Goodwill consists of the excess of the purchase price over the fair value of identifiable net assets acquired in a business combination and is assigned at the reporting unit level. We identify our reporting units at the level of our Wireless operating segment or one level below.
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| Spectrum Licenses | Spectrum Licenses Spectrum licenses are carried at costs incurred to acquire the spectrum licenses and the costs to prepare the spectrum licenses for their intended use, such as costs to clear acquired spectrum licenses. The FCC issues spectrum licenses which provide us with the exclusive right to utilize designated radio frequency spectrum within specific geographic service areas to provide wireless communications services. Spectrum licenses are issued for a fixed period of time, typically up to 15 years; however, the FCC has granted license renewals routinely and at a nominal cost. The spectrum licenses acquired expire at various dates and we believe we will be able to meet all requirements necessary to secure renewal of our spectrum licenses at a nominal cost. Moreover, we determined that there are currently no legal, regulatory, contractual, competitive, economic or other factors that limit the useful lives of our spectrum licenses. The utility of radio frequency spectrum does not diminish while activated on our network nor does it otherwise deteriorate over time. Therefore, we determined the spectrum licenses should be treated as indefinite-lived intangible assets. At times, we enter into agreements to sell or exchange spectrum licenses. Upon entering into a sale or exchange arrangement, if the transaction has been deemed to have commercial substance and the spectrum licenses meet the held for sale criteria, the licenses are classified as held for sale at their carrying value, as adjusted for any impairment recognized, included in Other current assets or Other assets on our Consolidated Balance Sheets until approval and completion of the sale or an exchange. Upon closing of the transaction, spectrum licenses acquired as part of an exchange of nonmonetary assets are recorded at fair value and the difference between the fair value of the spectrum licenses obtained, carrying value of the spectrum licenses transferred and cash paid, if any, is recognized as a gain or loss on disposal of spectrum licenses included in Selling, general and administrative expenses on our Consolidated Statements of Comprehensive Income. Our fair value estimates of spectrum licenses are based on information for which there is little or no observable market data. If the transaction lacks commercial substance or the fair value is not measurable, the acquired spectrum licenses are recorded at our carrying value of the spectrum assets transferred or exchanged. We have lease agreements (the “Agreements”) with various educational and non-profit institutions that provide us with the right to use Federal Communications Commission (“FCC”) spectrum licenses (known as “Educational Broadband Services” or “EBS” spectrum) in the 2.5 GHz band. The Agreements are typically for terms of to 10 years with automatic renewal provisions, bringing the total term of the Agreements up to 30 years. A majority of the Agreements include a right of first refusal to acquire, lease or otherwise use the license at the end of the automatic renewal periods. Leased FCC spectrum licenses are recorded as executory contracts, and contractual lease payments are recognized on a straight-line basis over the remaining term of the arrangement, including renewals, and are presented in Cost of services on our Consolidated Statements of Comprehensive Income. The spectrum licenses we hold plus the spectrum leases enhance the overall value of our spectrum licenses as the collective value is higher than the value of individual bands of spectrum within a specific geography. This value is derived from the ability to provide wireless service to customers across large geographic areas and maintain the same or similar wireless connectivity quality. This enhanced value from combining owned and leased spectrum licenses is referred to as an aggregation premium. The aggregation premium is a component of the overall fair value of our owned FCC spectrum licenses.
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| Equity Method Investments | Equity Method Investments Investments in entities that we do not control but have significant influence are accounted for under the equity method. We record our proportionate share of our equity method investees’ earnings (losses) within Other (expense) income, net on our Consolidated Statements of Comprehensive Income.
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| Fair Value Measurements | Fair Value Measurements We carry certain assets and liabilities at fair value. Fair value is defined as an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The three-tier hierarchy for inputs used in measuring fair value, which prioritizes the inputs based on the observability as of the measurement date, is as follows: Level 1 Quoted prices in active markets for identical assets or liabilities; Level 2 Observable inputs other than the quoted prices in active markets for identical assets and liabilities; and Level 3 Unobservable inputs for which there is little or no market data, which require us to develop assumptions of what market participants would use in pricing the asset or liability. Assets and liabilities are classified in their entirety based on the lowest level of input that is significant to the fair value measurement. Our assessment of the significance of a particular input to the fair value measurement requires judgment and may affect the placement of assets and liabilities being measured within the fair value hierarchy. The carrying values of Cash and cash equivalents, Accounts receivable and Accounts payable and accrued liabilities approximate fair value due to the short-term maturities of these instruments. The carrying values of EIP receivables approximate fair value as the receivables are generally recorded at their present value using an imputed interest rate. With the exception of certain long-term fixed-rate debt, there were no financial instruments with a carrying value materially different from their fair value.
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| Foreign Currency Transactions | Foreign Currency Transactions As of December 31, 2025, we held €4.8 billion of euro (“EUR”) denominated debt, which is subject to foreign currency exchange rate fluctuations. T-Mobile’s functional currency is the U.S. dollar (“USD”). Each period, we convert activity and balances in EUR into USD using average exchange rates for the period for income statement amounts and using end-of-period or spot exchange rates for assets and liabilities. We record transaction gains and losses resulting from the conversion of transaction currency to functional currency as a component of Other (expense) income, net on our Consolidated Statements of Comprehensive Income.
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| Derivative and Hedging Instruments | Derivative and Hedging Instruments The Company manages its exposure to foreign exchange rates and interest rates through a risk management program that includes the use of derivative financial instruments, including cross-currency swaps. We designate certain derivatives as accounting hedge relationships. We do not hold derivatives for trading or speculative purposes. We record derivatives on our Consolidated Balance Sheets and recognize them as either assets or liabilities at fair value. Fair value is derived primarily from observable market data, and our derivatives are classified as Level 2 in the fair value hierarchy. Cash flows associated with qualifying hedge derivative instruments are presented in the same category on our Consolidated Statements of Cash Flows as the item being hedged. For fair value hedges, other than foreign currency hedges, the change in the fair value of the derivative instruments is recognized in earnings through the same income statement line item as the change in the fair value of the hedged item. For cash flow hedges, as well as fair value foreign currency hedges, the change in the fair value of the derivative instruments is reported in Accumulated other comprehensive loss and recognized in earnings when the hedged item is recognized in earnings, again, through the same income statement line item.
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| Revenue Recognition | Revenue Recognition We primarily generate our revenue from providing wireless communications services and selling devices and accessories to customers. Our contracts with customers may involve more than one performance obligation, which include wireless services, wireless devices or a combination thereof, and we allocate the transaction price between each performance obligation based on its relative standalone selling price. Wireless Communications Services Revenue We generate our wireless communications services revenues from providing access to, and usage of, our wireless communications network. Service revenues also include revenues earned for providing premium services to customers, such as device insurance services. Generally, service contracts are billed monthly in advance of services being transferred or are prepaid. Service revenue is recognized as we satisfy our performance obligation to transfer service to our customers. We typically satisfy our stand-ready performance obligations, including unlimited wireless services, evenly over the contract term as services are transferred to our customers. The enforceable duration of our postpaid service contracts with customers is typically one month. However, promotional EIP bill credits offered to a customer on an equipment sale that are paid over time and are contingent on the customer maintaining a service contract may result in an extended service contract based on whether a substantive penalty is deemed to exist. Revenue is recorded net of costs paid to a third party for performance obligations where we facilitate an arrangement for the other party to transfer goods or services to our customer (i.e., when we are acting as an agent). For example, performance obligations relating to services provided by third-party content providers where we neither control a right to the content provider’s service nor control the underlying service itself are presented net. Consideration payable to a customer is treated as a reduction of the total transaction price, unless the payment is in exchange for a distinct good or service, such as certain commissions paid to dealers, in which case the payment is treated as a purchase of that distinct good or service. Federal Universal Service Fund (“USF”) and state USF fees are assessed to T-Mobile by various governmental authorities in connection with the services we provide to our customers and are included in Cost of services. When we separately bill and collect these regulatory fees from customers, they are recorded gross in Total service revenues on our Consolidated Statements of Comprehensive Income. For the years ended December 31, 2025, 2024 and 2023, we recorded approximately $400 million, $386 million and $317 million, respectively, of USF fees on a gross basis. We have made an accounting policy election to exclude from the measurement of the transaction price all taxes assessed to the customer by a governmental authority that are both imposed on and concurrent with a specific revenue-producing transaction and collected by us from a customer on behalf of the taxing agency (e.g., sales, use, value added, and some excise taxes). Equipment Revenues We generate equipment revenues from the sale of mobile communication devices and accessories. Equipment revenues related to device and accessory sales are typically recognized at a point in time when control of the device or accessory is transferred to the customer or dealer. We have elected to account for shipping and handling activities that occur after control of the related good transfers as fulfillment activities, as opposed to performance obligations. We estimate variable consideration (e.g., device returns or certain payments to indirect dealers) primarily based on historical experience. Equipment sales for which we determine it is not probable that we will collect substantially all of the transaction price are generally recorded as payments are received. Our assessment of collectibility considers contract terms such as down payments that reduce our exposure to credit risk. We offer certain customers the option to pay for devices and accessories in installments using an EIP. This financing option is provided at a stated interest of zero and is typically over a 24-month period. We recognize as a reduction of the total transaction price the effects of a financing component in contracts via the imputation of interest when customers purchase their devices and accessories on an EIP, including those financing components that are not considered to be significant to the contract. However, we have elected the practical expedient of not recognizing the effects of a significant financing component for contracts where we expect, at contract inception, that the period between the transfer of a performance obligation to a customer and the customer’s payment for that performance obligation will be one year or less. Imputed Interest on EIP Receivables For EIP with a duration greater than one year, we record the effects of financing via the imputation of interest. This is performed on all such EIP receivables regardless as to whether or not the financing is considered to be significant. The imputation of interest results in a discount of the EIP receivable, thereby adjusting the transaction price of the contract with the customer, which is then allocated to the performance obligations of the arrangement. Judgment is required to determine the imputed interest rate. For EIP sales, the imputed rate used to adjust the transaction price reflects current market interest rates, including the estimated credit risk of the underlying customers. Customer credit behavior is inherently uncertain. See “Receivables and Related Allowance for Credit Losses” above, for additional discussion on how we assess credit risk. Contract Balances Generally, our devices and service plans are available at standard prices, which are maintained on price lists and published on our website and/or within our retail stores. For contracts that involve more than one product or service that are identified as separate performance obligations, the transaction price is allocated to the performance obligations based on their relative standalone selling prices. The standalone selling price is the price at which we would sell the good or service separately, on a standalone basis, to similar customers in similar circumstances. A contract asset is recorded when revenue is recognized in advance of our right to receive consideration (i.e., we must perform additional services in order to receive consideration). Amounts are recorded as receivables when our right to consideration is unconditional. When consideration is received, or we have an unconditional right to consideration in advance of delivery of goods or services, a contract liability is recorded. The transaction price can include non-refundable upfront fees, which are allocated to the identifiable performance obligations. Contract assets are included in Other current assets and Other assets and contract liabilities are included in Deferred revenue on our Consolidated Balance Sheets. See Note 11 – Revenue from Contracts with Customers for further information. Contract Modifications Our service contracts allow customers to frequently modify their contracts without incurring penalties, in many cases. For contract modifications, we evaluate the change in scope or price of the contract to determine if the modification should be treated as a separate contract, as if there is a termination of the existing contract and creation of a new contract, or if the modification should be considered a change associated with the existing contract. We typically do not have significant impacts from contract modifications. Contract Costs We incur certain incremental costs to obtain a contract that we expect to recover, such as sales commissions. We record an asset when these incremental costs to obtain a contract are incurred and amortize them on a systematic basis that is consistent with the transfer to the customer of the goods or services to which the asset relates. We capitalize postpaid sales commissions for service activation as costs to acquire a contract and amortize them on a straight-line basis over the estimated period of benefit, currently 24 months. For capitalized contract costs, determining the amortization period over which such costs are recognized as well as assessing the indicators of impairment requires judgment. Prepaid commissions are expensed as incurred as their estimated period of benefit does not extend beyond 12 months. Commissions paid upon device upgrade are not capitalized if the remaining customer contract is less than one year. Incremental costs to obtain equipment contracts (e.g., commissions paid on device and accessory sales) are recognized when the equipment is transferred to the customer.
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| Leases | Leases Cell Site, Retail Store and Office Facility Leases We are a lessee for non-cancelable operating and financing leases for cell sites, switch sites, retail stores, network equipment and office facilities. We recognize a right-of-use asset and lease liability for operating leases based on the net present value of future minimum lease payments. The right-of-use asset for an operating lease is based on the lease liability. Lease expense is recognized on a straight-line basis over the non-cancelable lease term and renewal periods that are considered reasonably certain. In addition, we have financing leases for certain network equipment. We recognize a right-of-use asset and lease liability for financing leases based on the net present value of future minimum lease payments. The right-of-use asset for a finance lease is based on the lease liability. Expense for our financing leases is comprised of the amortization expense associated with the right-of-use asset and interest expense recognized based on the effective interest method. We include options to extend or terminate a lease when we are reasonably certain that we will exercise that option. We consider several factors in assessing whether renewal periods are reasonably certain of being exercised, including the continued maturation of our nationwide network, technological advances within the telecommunications industry and the availability of alternative sites. We have generally concluded we are not reasonably certain to exercise the options to extend or terminate our leases. Therefore, as of the lease commencement date, our lease terms generally do not include these options. In determining the discount rate used to measure the right-of-use asset and lease liability, we use rates implicit in the lease, or if not readily available, we use our incremental borrowing rate. Our incremental borrowing rate is based on an estimated secured rate comprised of a risk-free rate plus a credit spread as secured by our assets. Determining a credit spread as secured by our assets may require judgment. Certain of our lease agreements include rental payments based on changes in the consumer price index (“CPI”). Lease liabilities are not remeasured as a result of changes in the CPI; instead, changes in the CPI are treated as variable lease payments and are excluded from the measurement of the right-of-use asset and lease liability. These payments are recognized in the period in which the related obligation is incurred. Our lease agreements do not contain any material residual value guarantees or material restrictive covenants. Generally, we elected the practical expedient to not separate lease and non-lease components in arrangements. We did not elect the short-term lease recognition exemption; as such, leases with terms shorter than 12 months are included as a right-of-use asset and lease liability. Rental revenues and expenses associated with co-location tower sites are presented on a net basis under Topic 842. See Note 17 – Leases for further information. Cell Tower Monetization Transactions In 2012, we entered into a prepaid master lease arrangement in which we as the lessor provided the rights to utilize tower sites and we leased back space on certain of those towers. Prior to our merger (the “Sprint Merger”) with Sprint Corporation (“Sprint”), Sprint entered into a similar lease-out and leaseback arrangement that we assumed in the Sprint Merger. These arrangements are treated as failed sale leasebacks in which the proceeds received are reported as a financing obligation. The principal payments on the tower obligations are included in Other, net within Net cash used in financing activities on our Consolidated Statements of Cash Flows. Our historical tower site asset costs are reported in Property and equipment, net on our Consolidated Balance Sheets and are depreciated.
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| Sprint Retirement Pension Plan | Sprint Retirement Pension Plan We provide the Sprint Retirement Pension Plan (the “Pension Plan”), which is a defined benefit pension plan providing postretirement benefits to certain employees. As of December 31, 2005, the Pension Plan was amended to freeze benefit plan accruals for participants. The investments in the Pension Plan are measured at fair value on a recurring basis each quarter using quoted market prices or the net asset value per share as a practical expedient. The projected benefit obligations associated with the Pension Plan are determined based on actuarial models utilizing mortality tables and discount rates applied to the expected benefit term.
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| Advertising Expense | Advertising Expense We expense the cost of advertising and other promotional expenditures to market our services and products as incurred.
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| Income Taxes | Income Taxes Deferred tax assets and liabilities are recognized based on temporary differences between the consolidated financial statements and tax bases of assets and liabilities using enacted tax rates expected to be in effect when these differences are realized. A valuation allowance is recorded when it is more likely than not that some portion or all of a deferred tax asset will not be realized. The ultimate realization of a deferred tax asset depends on the ability to generate sufficient taxable income of the appropriate character and in the appropriate taxing jurisdictions within the carryforward periods available. We account for uncertainty in income taxes recognized on our consolidated financial statements in accordance with the accounting guidance for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. We assess whether it is more likely than not that a tax position will be sustained upon examination based on the technical merits of the position and adjust the unrecognized tax benefits in light of changes in facts and circumstances, such as changes in tax law, interactions with taxing authorities and developments in case law.
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| Other Comprehensive Income | Other Comprehensive Income Other comprehensive income primarily consists of adjustments, net of tax, related to reclassification of loss from cash flow hedges, fair value hedges, foreign currency translation, pension and other postretirement benefits. This is reported in Accumulated other comprehensive loss as a separate component of stockholders’ equity until realized in earnings.
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| Stock-Based Compensation | Stock-Based Compensation Stock-based compensation expense for stock awards, which include restricted stock units (“RSUs”) and performance-based restricted stock units (“PRSUs”), is measured at fair value on the grant date and recognized as expense, net of expected forfeitures, over the related service period. The fair value of stock awards is based on the closing price of our common stock on the date of grant, adjusted for expected dividend yield. RSUs are recognized as expense using the straight-line method. PRSUs are recognized as expense following a graded vesting schedule with their performance reassessed and updated on a quarterly basis, or more frequently as changes in facts and circumstances warrant.
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| Stockholder Return Programs | Stockholder Return Programs On September 8, 2022, our Board of Directors authorized a stock repurchase program for up to $14.0 billion of our common stock through September 30, 2023 (the “2022 Stock Repurchase Program”). On September 6, 2023, our Board of Directors authorized a stockholder return program of up to $19.0 billion through December 31, 2024 (the “2023-2024 Stockholder Return Program”). The 2023-2024 Stockholder Return Program consisted of additional repurchases of shares of our common stock and the payment of cash dividends. On December 13, 2024, we announced that our Board of Directors authorized our 2025 Stockholder Return Program of up to $14.0 billion through December 31, 2025 (the “2025 Stockholder Return Program”). The 2025 Stockholder Return Program consisted of additional repurchases of shares of our common stock and the payment of cash dividends. On December 11, 2025, we announced that our Board of Directors authorized our 2026 Stockholder Return Program of up to $14.6 billion that will run through December 31, 2026 (the “2026 Stockholder Return Program”). The 2026 Stockholder Return Program is expected to consist of additional repurchases of shares of our common stock and the payment of cash dividends. The amount available under the 2026 Stockholder Return Program for share repurchases will be reduced by the amount of any cash dividends declared and paid by us. The cost of repurchased shares, including equity reacquisition costs and related taxes, is included in Treasury stock on our Consolidated Balance Sheets. We accrue the cost of repurchased shares and exclude such shares from the calculation of basic and diluted earnings per share, as of the trade date. We recognize a liability for share repurchases which have not settled and for which cash has not been paid in Other current liabilities on our Consolidated Balance Sheets. Cash payments to reacquire our shares, including equity reacquisition costs and related taxes, are included in Repurchases of common stock on our Consolidated Statements of Cash Flows. Dividends declared are included as a reduction to Retained earnings on our Consolidated Balance Sheets. We recognize a liability for dividends declared but for which cash has not been paid in Other current liabilities on our Consolidated Balance Sheets. Dividend cash payments to stockholders are included in Net cash used in financing activities on our Consolidated Statements of Cash Flows.
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| Earnings Per Share | Earnings Per Share Basic earnings per share is computed by dividing Net income attributable to common stockholders by the weighted-average number of common shares outstanding for the period. Diluted earnings per share is computed by giving effect to all potentially dilutive common shares outstanding during the period. Potentially dilutive common shares consist of outstanding stock options, RSUs and PRSUs, calculated using the treasury stock method.
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| Variable Interest Entities | Variable Interest Entities VIEs are entities that lack sufficient equity to permit the entity to finance its activities without additional subordinated financial support from other parties, have equity investors that do not have the ability to make significant decisions relating to the entity's operations through voting rights, do not have the obligation to absorb the expected losses or do not have the right to receive the residual returns of the entity. The most common type of VIE is a special purpose entity (“SPE”). SPEs are commonly used in securitization transactions in order to isolate certain assets and distribute the cash flows from those assets to investors. SPEs are generally structured to insulate investors from claims on the SPEs’ assets by creditors of other entities, including the creditors of the seller of the assets, these SPEs are commonly referred to as being bankruptcy remote. The primary beneficiary is required to consolidate the assets and liabilities of a VIE. The primary beneficiary is the party which has both the power to direct the activities of an entity that most significantly impact the VIE's economic performance, and through its interests in the VIE, the obligation to absorb losses or the right to receive benefits from the VIE which could potentially be significant to the VIE. In assessing which party is the primary beneficiary, all the facts and circumstances are considered, including each party’s role in establishing the VIE and its ongoing rights and responsibilities. This assessment includes, first, identifying the activities that most significantly impact the VIE’s economic performance; and second, identifying which party, if any, has power over those activities. In general, the parties that make the most significant decisions affecting the VIE (such as asset managers and servicers) or have the right to unilaterally remove those decision-makers are deemed to have the power to direct the activities of a VIE.
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| Accounting Pronouncements Not Yet Adopted | Accounting Pronouncements Adopted During the Current Year Income Tax Disclosures In December 2023, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2023-09, “Income Taxes (Topic 740): Improvements to Income Tax Disclosures.” The standard enhances income tax disclosure requirements for all entities by requiring specified categories and greater disaggregation within the rate reconciliation table, disclosure of income taxes paid by jurisdiction, and providing clarification on uncertain tax positions and related financial statement impacts. We adopted the standard for our fiscal year 2025 annual financial statements. The guidance was applied retrospectively, and the required disclosures have been included in the Notes to the Consolidated Financial Statements. See Note 14 – Income Taxes for further information. Credit Losses: Purchased Loans In November 2025, the FASB issued ASU 2025-08, “Financial instruments – Credit Losses (Topic 326): Purchased Loans,” which amends the guidance in ASC 326 on the accounting for certain purchased loans. Under the ASU, entities must account for acquired loans, excluding credit card, that meet certain criteria at acquisition (purchased seasoned loans) by recognizing them at their purchase price plus an allowance for expected credit losses. Purchased seasoned loans are defined as either: (1) non-purchased credit deteriorated loans that are obtained in a business combination, or (2) non-purchased credit deteriorated loans that (a) are obtained in an asset acquisition or upon consolidation of a variable interest entity that is not a business and (b) are acquired more than 90 days after their origination date by a transferee that was not involved in their origination. We adopted the standard for our fiscal year 2025 annual financial statements. This guidance was applied retrospectively, and the adoption of the standard did not have a material impact on our Consolidated Financial Statements. Accounting Pronouncements Not Yet Adopted Disaggregation of Income Statement Expenses In November 2024, the FASB issued ASU 2024-03, “Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses.” The standard requires that public business entities disclose additional information about specific expense categories in the notes to financial statements for interim and annual reporting periods. The standard will become effective for us for our fiscal year 2027 annual financial statements and interim financial statements thereafter and may be applied prospectively to periods after the adoption date or retrospectively for all prior periods presented in the financial statements, with early adoption permitted. We plan to adopt the standard when it becomes effective for us beginning in our fiscal year 2027 annual financial statements, and we are currently evaluating the impact this guidance will have on the disclosures included in the Notes to the Consolidated Financial Statements. Internal-Use Software Accounting and Disclosures In September 2025, the FASB issued ASU 2025-06, “Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Targeted Improvements to the Accounting for Internal-Use Software.” The amendments remove all references to project stages in ASC 350-40, clarify the threshold entities apply to begin capitalizing costs and address challenges arising from the evolution of software development practices. The new guidance modernizes accounting for software developed using incremental and iterative methods, where the existing model provided limited direction on when capitalization should begin. The ASU also specifies that the disclosures under ASC 360-10, “Property, Plant, and Equipment—Overall,” apply to capitalized software costs accounted for under ASC 350-40, regardless of how those costs are presented in the financial statements. The standard will become effective for our fiscal year 2028 annual financial statements and interim financial statements thereafter and may be applied prospectively to periods after the adoption date, retrospectively for all prior periods presented in the financial statements or using a modified retrospective transition approach with early adoption permitted. We do not expect the adoption to have a material impact on our Consolidated Financial Statements and related disclosures. Interim Reporting In December 2025, the FASB issued ASU 2025-11, “Interim Reporting (Topic 270): Narrow-Scope Improvements.” The standard improves the navigability of interim disclosures, clarifies when Topic 270 applies and provides additional interim disclosure guidance, including a principle to disclose material events since the most recent annual reporting period. The amendments do not change the underlying objectives of interim reporting but are designed to enhance clarity in application. The standard is effective for us beginning January 1, 2028, with early adoption permitted, and may be applied prospectively or retrospectively. We evaluated this standard and concluded our current interim reporting disclosures are consistent with this standard. Accordingly, we do not expect the adoption of this standard to have a material impact on our interim reporting disclosures.
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Business Combinations (Tables) |
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| Business Combination, Asset Acquisition, Transaction between Entities under Common Control, and Joint Venture Formation [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Fair Value Consideration Transferred | The acquisition-date fair value of consideration transferred in the Ka’ena Acquisition is comprised of the following:
The acquisition-date fair value of consideration transferred in the UScellular Acquisition is comprised of the following:
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| Schedule of Fair Value of Assets Acquired and Liabilities Assumed | The following table summarizes the assigned fair values for each class of assets acquired and liabilities assumed at the Ka’ena Acquisition Date, as adjusted during the measurement period, which closed on April 30, 2025, based on information identified after the Ka’ena Acquisition Date. We retained the services of certified valuation specialists to assist with assigning values to certain acquired assets.
The following table summarizes the provisionally assigned fair values for each class of assets acquired and liabilities assumed at the UScellular Acquisition Date. We retained the services of certified valuation specialists to assist with assigning values to certain acquired assets and liabilities assumed. We are in the process of finalizing the valuation of the assets acquired and liabilities assumed. Therefore, the provisionally assigned fair values set forth below are subject to adjustment as additional information is obtained.
(1)Includes $749 million, $51 million and $698 million of Operating lease right-of-use assets, Short-term operating lease liabilities and Operating lease liabilities, respectively, for towers associated with the UScellular master license agreement where we were not leasing tower space prior to the UScellular Acquisition Date. (2)The obligation to execute the Exchange Offers was recorded as debt assumed in the UScellular Acquisition with an aggregate assigned fair value of $1.7 billion. The following table summarizes the provisionally assigned fair values for each class of assets acquired and liabilities assumed at the Vistar Acquisition Date. We are in the process of finalizing the valuation of the assets acquired and liabilities assumed, including income tax-related amounts. Therefore, the provisionally assigned fair values set forth below are subject to adjustment as additional information is obtained.
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Receivables and Related Allowance for Credit Losses (Tables) |
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Dec. 31, 2025 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Receivables [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Equipment Installment Plan Receivables | The following table summarizes the EIP receivables, including imputed discounts and related allowance for credit losses:
(1)Through the UScellular Acquisition, we acquired EIP receivables with a fair value of $891 million as of August 1, 2025. As they were recorded at fair value, an imputed discount was not recognized on the acquired receivables.
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| Schedule of Equipment Installment Plan Receivables by Credit Category | The following table presents the amortized cost of our EIP receivables, including EIP receivables acquired through the UScellular Acquisition, by delinquency status, customer credit class and year of origination as of December 31, 2025:
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| Schedule of Write Offs Net of Recoveries | The following table presents write-offs of our EIP receivables by year of origination for the year ended December 31, 2025:
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| Schedule of Unamortized Imputed Discount and Allowance for Credit Losses for Equipment Installment Plan Receivables | Activity for the years ended December 31, 2025, 2024 and 2023 in the allowance for credit losses and unamortized imputed discount balances for the accounts receivable and EIP receivables segments were as follows:
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Sales of Certain Receivables (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Dec. 31, 2025 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Transfers and Servicing [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Variable Interest Entities - EIP | The following table summarizes the carrying amounts and classification of liabilities, which consist of the recourse guarantee, included on our Consolidated Balance Sheets with respect to the EIP BRE:
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| Schedule of Variable Interest Entities | The following table summarizes the carrying amounts and classification of liabilities included on our Consolidated Balance Sheets with respect to the Service BRE:
The following table summarizes the carrying amounts and classification of assets and liabilities included in our Consolidated Balance Sheets with respect to the ABS Entities:
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| Schedule of Factoring Arrangement | The following table summarizes the impact of the sales of certain service receivables and EIP receivables on our Consolidated Balance Sheets:
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Property and Equipment (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Dec. 31, 2025 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Property, Plant and Equipment [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Property and Equipment | The components of property and equipment, excluding amounts transferred to held for sale, were as follows:
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| Schedule of Asset Retirement Obligations | Activity in our asset retirement obligations for the years ended December 31, 2025 and 2024, were as follows:
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Goodwill, Spectrum License Transactions and Other Intangible Assets (Tables) |
12 Months Ended | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Dec. 31, 2025 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Goodwill and Intangible Assets Disclosure [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Goodwill | The changes in the carrying amount of goodwill for the years ended December 31, 2025 and 2024, are as follows:
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| Schedule of Spectrum Licenses | The following table summarizes our spectrum license activity for the years ended December 31, 2025, 2024 and 2023:
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| Schedule of Other Intangible Assets | The components of Other intangible assets were as follows: (1)Includes intangible assets acquired through our acquisitions. See Note 2 - Business Combinations and Note 3 - Joint Ventures for more information.
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| Schedule of Estimated Aggregate Future Amortization Expense | The estimated aggregate future amortization expense for intangible assets subject to amortization is summarized below:
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Fair Value Measurements (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Dec. 31, 2025 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Fair Value Disclosures [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Cross Currency Swaps | The following table summarizes the activity of our cross-currency swaps:
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| Schedule of Carrying Values and Fair Values of Short-Term and Long-term Debt | The carrying amounts and fair values of our short-term and long-term debt, excluding accrued interest, included on our Consolidated Balance Sheets were as follows:
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Debt (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Dec. 31, 2025 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Debt Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Debt Balances and Activity | Debt was as follows:
(1)Interest is based on the Secured Overnight Financing Rate (“SOFR”) for the interest period plus an applicable margin. The floating rate, including the applicable margin, on the ECA Facility due March 2036 was 4.927% for the interest payment made during the year ended December 31, 2025. No interest was paid on the ECA Facility due November 2036 during the year ended December 31, 2025. Long-term debt was classified as follows:
During the year ended December 31, 2025, we issued and borrowed the following debt:
(1)Includes accrued or paid issuance costs and discounts. (2)In connection with the closing of the UScellular Acquisition, we became obligated to execute the Exchange Offers of certain senior notes of UScellular pursuant to which T-Mobile notes with an aggregate outstanding principal balance of $1.7 billion were issued with the same interest rate, interest payment dates, maturity dates and redemption terms as each corresponding series of senior notes of UScellular. See Note 2 – Business Combinations for further information regarding the UScellular Acquisition.
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| Schedule of Repayments | During the year ended December 31, 2025, we made the following note redemptions and repayments:
(1)Write-off of issuance costs and consent fees are included in Other (expense) income, net on our Consolidated Statements of Comprehensive Income. Write-off of issuance costs and consent fees are included in Other, net within Net cash provided by operating activities on our Consolidated Statements of Cash Flows.
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| Schedule of Maturities of ABS Notes | The expected maturities of our ABS Notes as of December 31, 2025, were as follows:
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| Schedule of Variable Interest Entities | The following table summarizes the carrying amounts and classification of liabilities included on our Consolidated Balance Sheets with respect to the Service BRE:
The following table summarizes the carrying amounts and classification of assets and liabilities included in our Consolidated Balance Sheets with respect to the ABS Entities:
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Tower Obligations (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Dec. 31, 2025 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Leases [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Impacts to Consolidated Balance Sheets | The following table summarizes the balances associated with both of the tower arrangements on our Consolidated Balance Sheets:
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Revenue from Contracts with Customers (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Dec. 31, 2025 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Revenue from Contract with Customer [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Disaggregation of Revenue | Postpaid service revenues, including postpaid phone revenues and postpaid other revenues, were as follows:
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| Schedule of Contract Liability and Receivable Balances | The contract asset and contract liability balances from contracts with customers as of December 31, 2025 and 2024, were as follows:
Revenues for the years ended December 31, 2025, 2024 and 2023, include the following:
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Segment Reporting (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Dec. 31, 2025 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Segment Reporting [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Segment Reporting Information, by Segment | The following table provides the operating financial results of our Wireless segment:
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Employee Compensation and Benefit Plans (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Dec. 31, 2025 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Share-Based Payment Arrangement [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Stock-based Compensation Expense and Related Income Tax Benefits | Stock-based compensation expense and related income tax benefits were as follows:
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| Schedule of RSU and PRSU Awards Activity | The following activity occurred under the Incentive Plans during the year ended December 31, 2025: Time-Based Restricted Stock Units
Performance-Based Restricted Stock Units
(1)Represents PRSUs granted prior to 2025 for which the performance achievement period was completed in 2025, resulting in incremental unit awards. These PRSU awards are also included in the amount vested in 2025.
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| Schedule of Components of Net Expense Recognized for Pension Plan | The components of net benefit recognized for the Pension Plan were as follows:
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Income Taxes (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2025 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Income Tax Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Income (loss) before Income Tax | Our sources of Income before income taxes were as follows:
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| Schedule of Components of Income Tax Expense (Benefit) | Income tax expense is summarized as follows:
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| Schedule of Effective Income Tax Rate Reconciliation | The following table summarizes income tax expense and the calculation of the effective income tax rate:
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| Schedule of Deferred Tax Assets and Liabilities | Significant components of deferred income tax assets and liabilities, tax effected, are as follows:
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| Schedule of Unrecognized Tax Benefits Roll Forward | A reconciliation of the beginning and ending amount of unrecognized tax benefits were as follows:
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| Schedule of Supplemental Consolidated Statements of Cash Flows Information | Income taxes paid, net of refunds received, were as follows:
NM - Not meaningful, the amount of income taxes paid does not meet the 5% disaggregation threshold for reporting. The following table summarizes T-Mobile’s supplemental cash flow information:
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Earnings Per Share (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2025 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Earnings Per Share [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Computation of Basic and Diluted Earnings Per Share | The computation of basic and diluted earnings per share was as follows:
(1) For year ended December 31, 2025, the weighted-average number of shares issuable related to the Ka’ena Acquisition earnout (“Ka’ena Shares”) are included in our calculations of basic and diluted weighted-average shares outstanding based on the 20 trading day volume-weighted average price as of December 31, 2025, as further described below. (2) During 2023, the SoftBank Specified Shares (as defined below) were issued and included in our calculations of basic and diluted weighted-average shares outstanding as further described below. (3) Represents the Ka’ena Shares that were contingently issuable based on achievement of specified performance indicators from the Ka’ena Acquisition closing date of May 1, 2024, based on the maximum number of shares contingently issuable for the earnout and 20 trading day volume-weighted average price as of December 31, 2024.
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Leases (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2025 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Leases [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Components of Lease Expense | The components of lease expense were as follows:
Information relating to the lease term and discount rate is as follows:
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| Schedule of Maturity Operating Lease Liabilities | Maturities of lease liabilities as of December 31, 2025, were as follows:
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| Schedule of Maturity Finance Lease Liabilities | Maturities of lease liabilities as of December 31, 2025, were as follows:
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Commitment and Contingencies (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2025 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Commitments and Contingencies Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Timing of Purchase Commitments | The following table summarizes the timing of such purchase commitments as of December 31, 2025:
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| Schedule of Timing of Spectrum Lease and Service Credit Commitments | The following table summarizes the timing of spectrum lease and service credit commitments, including renewal periods as of December 31, 2025:
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Restructuring Costs (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Dec. 31, 2025 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Restructuring and Related Activities [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Restructuring Plan Expenses Incurred | The following table summarizes the expenses incurred in connection with our UScellular Acquisition restructuring initiatives for the year ended December 31, 2025:
The following table summarizes the expenses incurred in connection with our Network Restructuring Initiative for the year ended December 31, 2025:
The following table summarizes the expenses incurred in connection with our Sprint Merger restructuring initiatives:
The following table summarizes the expenses incurred in connection with the 2023 Workforce Reduction initiatives:
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| Schedule of Activity Related to Expenses Incurred and Cash Payments Made | The changes in the liabilities associated with our UScellular Acquisition restructuring initiatives, including expenses incurred and cash payments, are as follows:
(1) Non-cash items primarily consist of the write-off of assets within Network decommissioning. The changes in the liabilities associated with our Network Restructuring Initiative, including expenses incurred and cash payments, are as follows:
(1) Non-cash items primarily consist of the write-off of assets within Network decommissioning The changes in the liabilities associated with our 2025 Workforce Transformation initiative, including expenses incurred and cash payments, are as follows:
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Additional Financial Information (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Dec. 31, 2025 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Supplemental Financial Statement Elements [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Accounts Payable and Accrued Liabilities | Accounts payable and accrued liabilities are summarized as follows:
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| Schedule of Related Party Transactions | The following table summarizes the impact of significant transactions with DT or its affiliates included in Operating expenses in the Consolidated Statements of Comprehensive Income:
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| Schedule of Supplemental Consolidated Statements of Cash Flows Information | Income taxes paid, net of refunds received, were as follows:
NM - Not meaningful, the amount of income taxes paid does not meet the 5% disaggregation threshold for reporting. The following table summarizes T-Mobile’s supplemental cash flow information:
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| Schedule of Cash and Cash Equivalents, Including Restricted Cash | Cash and cash equivalents, including restricted cash, presented on our Consolidated Statements of Cash Flows were included on our Consolidated Balance Sheets as follows:
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| Schedule of Restricted Cash | Cash and cash equivalents, including restricted cash, presented on our Consolidated Statements of Cash Flows were included on our Consolidated Balance Sheets as follows:
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Summary of Significant Accounting Policies (Details) $ in Millions, € in Billions |
12 Months Ended | |||||||
|---|---|---|---|---|---|---|---|---|
|
Dec. 31, 2025
USD ($)
|
Dec. 31, 2024
USD ($)
|
Dec. 31, 2023
USD ($)
|
Dec. 31, 2025
EUR (€)
|
Dec. 11, 2025
USD ($)
|
Dec. 13, 2024
USD ($)
|
Sep. 06, 2023
USD ($)
|
Sep. 08, 2022
USD ($)
|
|
| New Accounting Pronouncements or Change in Accounting Principle [Line Items] | ||||||||
| EIP receivables initial term | 36 months | |||||||
| Other finance liabilities | € | € 4.8 | |||||||
| Term of contract | 1 month | |||||||
| Federal Universal Service Fund and other fees | $ 400 | $ 386 | $ 317 | |||||
| Financing option, devices and accessories, interest rate (percent) | 0.00% | |||||||
| Financing option, devices and accessories, payment period | 24 months | |||||||
| Average amortization period, deferred contract costs (in months) | 24 months | |||||||
| Advertising expense | $ 3,700 | $ 3,100 | $ 2,500 | |||||
| 2022 Stock Repurchase Program | ||||||||
| New Accounting Pronouncements or Change in Accounting Principle [Line Items] | ||||||||
| Stock repurchase program, authorized amount | $ 14,000 | |||||||
| 2023-2024 Stockholder Return Program | ||||||||
| New Accounting Pronouncements or Change in Accounting Principle [Line Items] | ||||||||
| Stock repurchase program, authorized amount | $ 19,000 | |||||||
| 2025 Stockholder Return Program | ||||||||
| New Accounting Pronouncements or Change in Accounting Principle [Line Items] | ||||||||
| Stock repurchase program, authorized amount | $ 14,000 | |||||||
| 2026 Stockholder Return Program | ||||||||
| New Accounting Pronouncements or Change in Accounting Principle [Line Items] | ||||||||
| Stock repurchase program, authorized amount | $ 14,600 | |||||||
| Sprint | ||||||||
| New Accounting Pronouncements or Change in Accounting Principle [Line Items] | ||||||||
| Total term of agreement | 30 years | |||||||
| Sprint | Spectrum Licenses | ||||||||
| New Accounting Pronouncements or Change in Accounting Principle [Line Items] | ||||||||
| Fixed period | 15 years | |||||||
| Minimum | Sprint | ||||||||
| New Accounting Pronouncements or Change in Accounting Principle [Line Items] | ||||||||
| Agreements with educational and certain non-profit institutions, term | 5 years | |||||||
| Minimum | EIP Securitization Arrangement | ||||||||
| New Accounting Pronouncements or Change in Accounting Principle [Line Items] | ||||||||
| Equipment installment plan, maximum payment term | 24 months | |||||||
| Maximum | Sprint | ||||||||
| New Accounting Pronouncements or Change in Accounting Principle [Line Items] | ||||||||
| Agreements with educational and certain non-profit institutions, term | 10 years | |||||||
Business Combinations - Narrative (Details) |
3 Months Ended | 12 Months Ended | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Aug. 01, 2025
USD ($)
tower_site
|
Jul. 22, 2025
USD ($)
agreement
|
Jun. 30, 2025
USD ($)
|
Mar. 03, 2025
USD ($)
|
Feb. 18, 2025
USD ($)
|
Feb. 03, 2025
USD ($)
|
May 24, 2024
USD ($)
|
May 01, 2024
USD ($)
shares
|
Apr. 30, 2024
USD ($)
|
Mar. 09, 2023
USD ($)
|
Dec. 31, 2024
USD ($)
|
Dec. 31, 2025
USD ($)
|
Dec. 31, 2024
USD ($)
|
Dec. 31, 2023
USD ($)
|
Aug. 05, 2025
USD ($)
|
Dec. 20, 2024 |
|
| Business Combination [Line Items] | ||||||||||||||||
| Goodwill | $ 13,005,000,000 | $ 13,678,000,000 | $ 13,005,000,000 | $ 12,234,000,000 | ||||||||||||
| Short-term debt assumed for financing of property and equipment | 1,653,000,000 | 0 | $ 0 | |||||||||||||
| Principal Issuances | 13,827,000,000 | |||||||||||||||
| EIP receivables | 4,379,000,000 | 4,997,000,000 | 4,379,000,000 | |||||||||||||
| Preliminary goodwill from the Ka’ena Acquisition in 2024 | 771,000,000 | |||||||||||||||
| Senior Notes | ||||||||||||||||
| Business Combination [Line Items] | ||||||||||||||||
| Principal Issuances | $ 10,827,000,000 | |||||||||||||||
| 6.700% Senior Notes due 2033 | Senior Notes | ||||||||||||||||
| Business Combination [Line Items] | ||||||||||||||||
| Principal Issuances | $ 489,000,000 | |||||||||||||||
| Interest rate, stated percentage | 6.70% | 6.70% | ||||||||||||||
| 6.250% Senior Notes due 2069 | Senior Notes | ||||||||||||||||
| Business Combination [Line Items] | ||||||||||||||||
| Principal Issuances | $ 393,000,000 | |||||||||||||||
| Interest rate, stated percentage | 6.25% | 6.25% | ||||||||||||||
| 5.500% Senior Notes due March 2070 | Senior Notes | ||||||||||||||||
| Business Combination [Line Items] | ||||||||||||||||
| Principal Issuances | $ 401,000,000 | |||||||||||||||
| Interest rate, stated percentage | 5.50% | 5.50% | ||||||||||||||
| 5.500% Senior Notes due June 2070 | Senior Notes | ||||||||||||||||
| Business Combination [Line Items] | ||||||||||||||||
| Principal Issuances | $ 395,000,000 | |||||||||||||||
| Interest rate, stated percentage | 5.50% | 5.50% | ||||||||||||||
| Ka Ena Corporation | Merger And Unit Purchase Agreement | ||||||||||||||||
| Business Combination [Line Items] | ||||||||||||||||
| Business acquisition, outstanding (percent) | 100.00% | |||||||||||||||
| Total consideration transferred | $ 1,350,000,000 | $ 1,350,000,000 | ||||||||||||||
| Business acquisition, cash acquired (percent) | 39.00% | |||||||||||||||
| Business acquisition, common shares acquired (percent) | 61.00% | |||||||||||||||
| Ka Ena Corporation | Merger and Unit Purchase Agreement, Amendment No. 1 | ||||||||||||||||
| Business Combination [Line Items] | ||||||||||||||||
| Total consideration transferred | $ 1,141,000,000 | |||||||||||||||
| Upfront payment transferred | $ 420,000,000 | |||||||||||||||
| Upfront payment, number of common shares transferred (in shares) | shares | 3,264,952 | |||||||||||||||
| Upfront payment, transferred shares value | $ 536,000,000 | |||||||||||||||
| Fair value of upfront payment, net | $ 956,000,000 | |||||||||||||||
| Business combination, contingent consideration, liability, deferred | 27,000,000 | |||||||||||||||
| Upfront payment, customary adjustments | 17,000,000 | |||||||||||||||
| Additional upfront payment to be paid | 420,000,000 | |||||||||||||||
| Business combination, potential earnout payment | 251,000,000 | |||||||||||||||
| Business combination, contingent consideration liability | 191,000,000 | |||||||||||||||
| Business combination, potential earnout payment for services | 169,000,000 | |||||||||||||||
| Liabilities for deferred consideration | 202,000,000 | $ 242,000,000 | 202,000,000 | |||||||||||||
| Liabilities for post-acquisition | $ 80,000,000 | 157,000,000 | $ 80,000,000 | |||||||||||||
| Goodwill | 777,000,000 | |||||||||||||||
| Goodwill expected to be tax deductible | 121,000,000 | |||||||||||||||
| Business acquisition, cash transferred | 396,000,000 | |||||||||||||||
| Increase in deferred tax liabilities | 83,000,000 | |||||||||||||||
| Accounts receivable | 34,000,000 | |||||||||||||||
| Total liabilities assumed | 506,000,000 | |||||||||||||||
| Ka Ena Corporation | Merger and Unit Purchase Agreement, Amendment No. 1 | Customer Relationships | ||||||||||||||||
| Business Combination [Line Items] | ||||||||||||||||
| Finite-lived, fair value | $ 545,000,000 | |||||||||||||||
| Lease space agreement term (years) | 6 years | |||||||||||||||
| Ka Ena Corporation | Merger and Unit Purchase Agreement, Amendment No. 1 | Tradenames | ||||||||||||||||
| Business Combination [Line Items] | ||||||||||||||||
| Finite-lived, fair value | $ 70,000,000 | |||||||||||||||
| Lease space agreement term (years) | 8 years | |||||||||||||||
| Ka Ena Corporation | Merger and Unit Purchase Agreement, Amendment No. 1 | Other Intangible Assets | ||||||||||||||||
| Business Combination [Line Items] | ||||||||||||||||
| Finite-lived, fair value | $ 125,000,000 | |||||||||||||||
| Lease space agreement term (years) | 4 years | |||||||||||||||
| UScellular Wireless Assets Operations | ||||||||||||||||
| Business Combination [Line Items] | ||||||||||||||||
| Total consideration transferred | $ 2,855,000,000 | |||||||||||||||
| Goodwill | 219,000,000 | |||||||||||||||
| Goodwill expected to be tax deductible | 32,000,000 | |||||||||||||||
| Business acquisition, cash transferred | 2,811,000,000 | |||||||||||||||
| Short-term debt assumed for financing of property and equipment | $ 1,700,000,000 | |||||||||||||||
| Short-term debt assumed for financing of property and equipment at fair value | $ 1,700,000,000 | |||||||||||||||
| Lessee leasing arrangements, operating leases, term of contract (years) | 30 months | |||||||||||||||
| Spectrum licenses | $ 1,730,000,000 | |||||||||||||||
| Accounts receivable | 317,000,000 | |||||||||||||||
| EIP receivables | 891,000,000 | |||||||||||||||
| Accounts receivable unpaid principal balances | 328,000,000 | |||||||||||||||
| EIP receivable unpaid principal balance | 1,100,000,000 | |||||||||||||||
| Total liabilities assumed | 3,772,000,000 | |||||||||||||||
| UScellular Wireless Assets Operations | Customer Relationships | ||||||||||||||||
| Business Combination [Line Items] | ||||||||||||||||
| Finite-lived, fair value | $ 379,000,000 | |||||||||||||||
| Lease space agreement term (years) | 10 years | |||||||||||||||
| UScellular Wireless Assets Operations | Tradenames | ||||||||||||||||
| Business Combination [Line Items] | ||||||||||||||||
| Finite-lived, fair value | $ 18,000,000 | |||||||||||||||
| Lease space agreement term (years) | 1 year | |||||||||||||||
| UScellular Wireless Assets Operations | Purchase Agreement | ||||||||||||||||
| Business Combination [Line Items] | ||||||||||||||||
| Payments for asset acquisition | $ 4,400,000,000 | |||||||||||||||
| Asset acquisition, maximum transferred liabilities incurred | $ 2,000,000,000 | |||||||||||||||
| Business acquisition, cash transferred | $ 2,800,000,000 | |||||||||||||||
| Number of towers to be extended tenancy term | tower_site | 600 | |||||||||||||||
| Lessee leasing arrangements, operating leases, term of contract (years) | 15 years | |||||||||||||||
| UScellular Wireless Assets Operations | Master License Agreement | ||||||||||||||||
| Business Combination [Line Items] | ||||||||||||||||
| Principal Issuances | $ 1,700,000,000 | |||||||||||||||
| Number of towers retained | tower_site | 2,100 | |||||||||||||||
| Number of towers leased on interim basis | tower_site | 1,800 | |||||||||||||||
| Operating lease right-of-use assets | $ 1,000,000,000.0 | |||||||||||||||
| Operating lease liabilities | 1,000,000,000.0 | |||||||||||||||
| Deferred tax assets | 261,000,000 | |||||||||||||||
| Increase in deferred tax liabilities | $ 261,000,000 | |||||||||||||||
| Vistar Media Inc. | ||||||||||||||||
| Business Combination [Line Items] | ||||||||||||||||
| Business acquisition, outstanding (percent) | 100.00% | |||||||||||||||
| Total consideration transferred | $ 617,000,000 | |||||||||||||||
| Goodwill | 343,000,000 | |||||||||||||||
| Increase in deferred tax liabilities | 61,000,000 | |||||||||||||||
| Accounts receivable | 157,000,000 | |||||||||||||||
| Total consideration transferred, including settlements of preexisting relationships | 621,000,000 | |||||||||||||||
| Total liabilities assumed | 193,000,000 | |||||||||||||||
| Vistar Media Inc. | Customer Relationships | ||||||||||||||||
| Business Combination [Line Items] | ||||||||||||||||
| Finite-lived, fair value | 201,000,000 | |||||||||||||||
| Vistar Media Inc. | Tradenames | ||||||||||||||||
| Business Combination [Line Items] | ||||||||||||||||
| Finite-lived, fair value | 8,000,000 | |||||||||||||||
| Vistar Media Inc. | Other Intangible Assets | ||||||||||||||||
| Business Combination [Line Items] | ||||||||||||||||
| Finite-lived, fair value | $ 55,000,000 | |||||||||||||||
| Vistar Media Inc. | Merger and Unit Purchase Agreement, Amendment No. 1 | Customer Relationships | ||||||||||||||||
| Business Combination [Line Items] | ||||||||||||||||
| Lease space agreement term (years) | 10 years | |||||||||||||||
| Vistar Media Inc. | Merger and Unit Purchase Agreement, Amendment No. 1 | Tradenames | ||||||||||||||||
| Business Combination [Line Items] | ||||||||||||||||
| Lease space agreement term (years) | 4 years | |||||||||||||||
| Vistar Media Inc. | Merger and Unit Purchase Agreement, Amendment No. 1 | Other Intangible Assets | ||||||||||||||||
| Business Combination [Line Items] | ||||||||||||||||
| Lease space agreement term (years) | 4 years | |||||||||||||||
| Blis Holdco Limited | ||||||||||||||||
| Business Combination [Line Items] | ||||||||||||||||
| Business acquisition, outstanding (percent) | 100.00% | |||||||||||||||
| Total consideration transferred | $ 174,000,000 | |||||||||||||||
| Business acquisition, cash transferred | $ 180,000,000 | |||||||||||||||
| Total assets acquired, including goodwill | 264,000,000 | |||||||||||||||
| Total liabilities assumed | 90,000,000 | |||||||||||||||
| Preliminary goodwill from the Ka’ena Acquisition in 2024 | $ 105,000,000 | |||||||||||||||
| Farmers Cellular Telephone Company Acquisition | Purchase Agreement | ||||||||||||||||
| Business Combination [Line Items] | ||||||||||||||||
| Number of separate asset purchase agreements | agreement | 3 | |||||||||||||||
| Business acquisition, cash transferred | $ 175,000,000 | |||||||||||||||
Business Combinations - Schedule of Fair Value of Consideration Transferred (Details) - USD ($) $ in Millions |
Aug. 01, 2025 |
May 01, 2024 |
|---|---|---|
| Ka Ena Corporation | Merger and Unit Purchase Agreement, Amendment No. 1 | ||
| Business Combination [Line Items] | ||
| Fair value of T-Mobile replacement equity awards attributable to pre-combination service | $ 527 | |
| Fair value of cash paid on the UScellular Acquisition Date | 396 | |
| Fair value of deferred earnout consideration | 191 | |
| Fair value of deferred other consideration | 27 | |
| Total fair value of consideration exchanged | $ 1,141 | |
| UScellular Wireless Assets Operations | ||
| Business Combination [Line Items] | ||
| Fair value of T-Mobile replacement equity awards attributable to pre-combination service | $ 44 | |
| Fair value of cash paid on the UScellular Acquisition Date | 2,811 | |
| Total fair value of consideration exchanged | $ 2,855 |
Business Combinations - Schedule of Fair Value of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Millions |
Feb. 03, 2025 |
May 01, 2024 |
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|---|---|---|---|---|---|
| Business Combination [Line Items] | |||||
| Goodwill | $ 13,678 | $ 13,005 | $ 12,234 | ||
| Ka Ena Corporation | Merger and Unit Purchase Agreement, Amendment No. 1 | |||||
| Business Combination [Line Items] | |||||
| Cash and cash equivalents | $ 24 | ||||
| Accounts receivable | 34 | ||||
| Inventory | 3 | ||||
| Prepaid expenses | 5 | ||||
| Other current assets | 10 | ||||
| Property and equipment | 1 | ||||
| Operating lease right-of-use assets | 2 | ||||
| Goodwill | 777 | ||||
| Other intangible assets | 740 | ||||
| Other assets | 51 | ||||
| Total assets acquired | 1,647 | ||||
| Accounts payable and accrued liabilities | 42 | ||||
| Deferred revenue | 297 | ||||
| Short-term operating lease liabilities | 1 | ||||
| Deferred tax liabilities | 83 | ||||
| Operating lease liabilities | 2 | ||||
| Other long-term liabilities | 81 | ||||
| Total liabilities assumed | 506 | ||||
| Total consideration transferred | $ 1,141 | ||||
| Vistar Media Inc. | |||||
| Business Combination [Line Items] | |||||
| Cash and cash equivalents | $ 42 | ||||
| Accounts receivable | 157 | ||||
| Prepaid expenses | 2 | ||||
| Property and equipment | 1 | ||||
| Operating lease right-of-use assets | 1 | ||||
| Goodwill | 343 | ||||
| Other intangible assets | 264 | ||||
| Total assets acquired | 810 | ||||
| Accounts payable and accrued liabilities | 129 | ||||
| Deferred revenue | 1 | ||||
| Deferred tax liabilities | 61 | ||||
| Operating lease liabilities | 2 | ||||
| Total liabilities assumed | 193 | ||||
| Total consideration transferred | $ 617 |
Business Combinations - Schedule of Fair Value of Assets Acquired and Liabilities Assumed UScellular Acquisition (Details) - USD ($) $ in Millions |
Aug. 01, 2025 |
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|---|---|---|---|---|
| Business Combination [Line Items] | ||||
| Goodwill | $ 13,678 | $ 13,005 | $ 12,234 | |
| UScellular Wireless Assets Operations | ||||
| Business Combination [Line Items] | ||||
| Cash and cash equivalents | $ 12 | |||
| Accounts receivable | 317 | |||
| Equipment installment plan receivables | 503 | |||
| Inventory | 129 | |||
| Prepaid expenses | 63 | |||
| Other current assets | 33 | |||
| Property and equipment | 1,448 | |||
| Operating lease right-of-use assets | 1,199 | |||
| Goodwill | 219 | |||
| Spectrum licenses | 1,730 | |||
| Other intangible assets | 397 | |||
| Equipment installment plan receivables due after one year | 388 | |||
| Deferred tax assets | 64 | |||
| Other assets | 125 | |||
| Total assets acquired | 6,627 | |||
| Accounts payable and accrued liabilities | 296 | |||
| Deferred revenue | 275 | |||
| Short-term operating lease liabilities | 179 | |||
| Other current liabilities | 114 | |||
| Long-term debt | 1,653 | |||
| Operating lease liabilities | 1,029 | |||
| Other long-term liabilities | 226 | |||
| Total liabilities assumed | 3,772 | |||
| Total consideration transferred | 2,855 | |||
| UScellular Wireless Assets Operations | Master License Agreement | ||||
| Business Combination [Line Items] | ||||
| Operating lease right-of-use assets | 749 | |||
| Short-term operating lease liabilities | 51 | |||
| Operating lease liabilities | $ 698 |
Joint Ventures (Details) $ in Millions |
3 Months Ended | 24 Months Ended | |
|---|---|---|---|
|
Sep. 30, 2025
USD ($)
customer
|
Jun. 30, 2025
USD ($)
customer
|
Dec. 31, 2028
USD ($)
|
|
| Lumos | |||
| Joint Venture [Line Items] | |||
| Expected investment to acquire interest in joint venture | $ 932 | ||
| Ownership interest in joint venture (percent) | 50.00% | ||
| Number of fiber customers | customer | 97,000 | ||
| Weighted average useful life | 9 years | ||
| Lumos | Forecast | |||
| Joint Venture [Line Items] | |||
| Expected investment to acquire interest in joint venture | $ 500 | ||
| Metronet | |||
| Joint Venture [Line Items] | |||
| Expected investment to acquire interest in joint venture | $ 4,600 | ||
| Ownership interest in joint venture (percent) | 50.00% | ||
| Number of fiber customers | customer | 713,000 | ||
| Weighted average useful life | 10 years | ||
Receivables and Related Allowance for Credit Losses - Narrative (Details) |
12 Months Ended | |
|---|---|---|
|
Dec. 31, 2025
segment
class
|
Dec. 31, 2024 |
|
| Financing Receivable, Allowance for Credit Loss [Line Items] | ||
| Portfolio segments | segment | 2 | |
| Customer classes | class | 2 | |
| EIP receivables initial term | 36 months | |
| EIP Receivables Allowance | ||
| Financing Receivable, Allowance for Credit Loss [Line Items] | ||
| Weighted average effective imputed interest rate | 10.30% | 11.10% |
Receivables and Related Allowance for Credit Losses - Schedule of Equipment Installment Plan Receivables (Details) - USD ($) $ in Millions |
Dec. 31, 2025 |
Aug. 01, 2025 |
Dec. 31, 2024 |
|---|---|---|---|
| Accounts, Notes, Loans and Financing Receivable [Line Items] | |||
| EIP receivables, gross | $ 8,626 | $ 7,402 | |
| Unamortized imputed discount | (566) | (524) | |
| EIP receivables, net of unamortized imputed discount | 8,060 | 6,878 | |
| Allowance for credit losses | (380) | (290) | |
| EIP receivables, net of allowance for credit losses and imputed discount | 7,680 | 6,588 | |
| Equipment installment plan receivables, net | 4,997 | 4,379 | |
| UScellular Wireless Assets Operations | |||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | |||
| Equipment installment plan receivables, net | $ 891 | ||
| Equipment installment plan receivables, net of allowance for credit losses and imputed discount | |||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | |||
| EIP receivables, net of allowance for credit losses and imputed discount | 4,997 | 4,379 | |
| Equipment installment plan receivables due after one year, net of allowance for credit losses and imputed discount | |||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | |||
| EIP receivables, net of allowance for credit losses and imputed discount | $ 2,683 | $ 2,209 |
Receivables and Related Allowance for Credit Losses - Schedule of Equipment Installment Plan Receivables by Credit Category (Details) - USD ($) $ in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Financing Receivable, Credit Quality Indicator [Line Items] | ||
| EIP receivables, net of unamortized imputed discount | $ 8,060 | $ 6,878 |
| Prime | ||
| Financing Receivable, Credit Quality Indicator [Line Items] | ||
| Originated in 2025 | 4,998 | |
| Originated in 2024 | 1,522 | |
| Originated prior to 2024 | 105 | |
| EIP receivables, net of unamortized imputed discount | 6,625 | |
| Subprime | ||
| Financing Receivable, Credit Quality Indicator [Line Items] | ||
| Originated in 2025 | 1,078 | |
| Originated in 2024 | 347 | |
| Originated prior to 2024 | 10 | |
| EIP receivables, net of unamortized imputed discount | 1,435 | |
| Current - 30 days past due | ||
| Financing Receivable, Credit Quality Indicator [Line Items] | ||
| EIP receivables, net of unamortized imputed discount | 7,875 | |
| Current - 30 days past due | Prime | ||
| Financing Receivable, Credit Quality Indicator [Line Items] | ||
| Originated in 2025 | 4,936 | |
| Originated in 2024 | 1,499 | |
| Originated prior to 2024 | 102 | |
| EIP receivables, net of unamortized imputed discount | 6,537 | |
| Current - 30 days past due | Subprime | ||
| Financing Receivable, Credit Quality Indicator [Line Items] | ||
| Originated in 2025 | 1,011 | |
| Originated in 2024 | 319 | |
| Originated prior to 2024 | 8 | |
| EIP receivables, net of unamortized imputed discount | 1,338 | |
| 31 - 60 days past due | ||
| Financing Receivable, Credit Quality Indicator [Line Items] | ||
| EIP receivables, net of unamortized imputed discount | 86 | |
| 31 - 60 days past due | Prime | ||
| Financing Receivable, Credit Quality Indicator [Line Items] | ||
| Originated in 2025 | 35 | |
| Originated in 2024 | 9 | |
| Originated prior to 2024 | 1 | |
| EIP receivables, net of unamortized imputed discount | 45 | |
| 31 - 60 days past due | Subprime | ||
| Financing Receivable, Credit Quality Indicator [Line Items] | ||
| Originated in 2025 | 31 | |
| Originated in 2024 | 10 | |
| Originated prior to 2024 | 0 | |
| EIP receivables, net of unamortized imputed discount | 41 | |
| 61 - 90 days past due | ||
| Financing Receivable, Credit Quality Indicator [Line Items] | ||
| EIP receivables, net of unamortized imputed discount | 53 | |
| 61 - 90 days past due | Prime | ||
| Financing Receivable, Credit Quality Indicator [Line Items] | ||
| Originated in 2025 | 17 | |
| Originated in 2024 | 7 | |
| Originated prior to 2024 | 1 | |
| EIP receivables, net of unamortized imputed discount | 25 | |
| 61 - 90 days past due | Subprime | ||
| Financing Receivable, Credit Quality Indicator [Line Items] | ||
| Originated in 2025 | 19 | |
| Originated in 2024 | 8 | |
| Originated prior to 2024 | 1 | |
| EIP receivables, net of unamortized imputed discount | 28 | |
| More than 90 days past due | ||
| Financing Receivable, Credit Quality Indicator [Line Items] | ||
| EIP receivables, net of unamortized imputed discount | 46 | |
| More than 90 days past due | Prime | ||
| Financing Receivable, Credit Quality Indicator [Line Items] | ||
| Originated in 2025 | 10 | |
| Originated in 2024 | 7 | |
| Originated prior to 2024 | 1 | |
| EIP receivables, net of unamortized imputed discount | 18 | |
| More than 90 days past due | Subprime | ||
| Financing Receivable, Credit Quality Indicator [Line Items] | ||
| Originated in 2025 | 17 | |
| Originated in 2024 | 10 | |
| Originated prior to 2024 | 1 | |
| EIP receivables, net of unamortized imputed discount | $ 28 |
Receivables and Related Allowance for Credit Losses - Schedule of Write Offs Net of Recoveries (Details) $ in Millions |
12 Months Ended |
|---|---|
|
Dec. 31, 2025
USD ($)
| |
| Write-offs | |
| Originated in 2025 | $ 234 |
| Originated in 2024 | 366 |
| Originated prior to 2024 | 64 |
| Total | $ 664 |
Receivables and Related Allowance for Credit Losses - Schedule of Unamortized Imputed Discount and Allowance for Credit Losses for Equipment Installment Plan Receivables (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Financing Receivable, Allowance for Credit Loss [Roll Forward] | |||
| Allowance for credit losses and imputed discount, beginning of period | $ 990 | $ 934 | $ 978 |
| Bad debt expense | 1,370 | 1,192 | 898 |
| Write-offs | (1,318) | (1,155) | (964) |
| Allowance for credit losses for acquired credit deteriorated receivables | 88 | 0 | 0 |
| Change in imputed discount on short-term and long-term EIP receivables | 225 | 199 | 220 |
| Impact on the imputed discount from sales of EIP receivables | (183) | (180) | (198) |
| Allowance for credit losses and imputed discount, end of period | 1,172 | 990 | 934 |
| Accounts Receivable Allowance | |||
| Financing Receivable, Allowance for Credit Loss [Roll Forward] | |||
| Allowance for credit losses and imputed discount, beginning of period | 176 | 161 | 167 |
| Bad debt expense | 694 | 592 | 440 |
| Write-offs | (654) | (577) | (446) |
| Allowance for credit losses for acquired credit deteriorated receivables | 10 | 0 | 0 |
| Allowance for credit losses and imputed discount, end of period | 226 | 176 | 161 |
| EIP Receivables Allowance | |||
| Financing Receivable, Allowance for Credit Loss [Roll Forward] | |||
| Allowance for credit losses and imputed discount, beginning of period | 814 | 773 | 811 |
| Bad debt expense | 676 | 600 | 458 |
| Write-offs | (664) | (578) | (518) |
| Allowance for credit losses for acquired credit deteriorated receivables | 78 | 0 | 0 |
| Change in imputed discount on short-term and long-term EIP receivables | 225 | 199 | 220 |
| Impact on the imputed discount from sales of EIP receivables | (183) | (180) | (198) |
| Allowance for credit losses and imputed discount, end of period | $ 946 | $ 814 | $ 773 |
Sales of Certain Receivables - Narrative (Details) - USD ($) $ in Millions |
12 Months Ended | |||
|---|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
Nov. 01, 2024 |
|
| Variable Interest Entity [Line Items] | ||||
| Losses from sales of receivables | $ 58 | $ 62 | $ 165 | |
| Variable Interest Entity, Primary Beneficiary | Variable Interest Entity, Primary Beneficiary | ||||
| Variable Interest Entity [Line Items] | ||||
| Gross receivables | $ 193 | |||
| Variable Interest Entity, Primary Beneficiary | Collateral Pledged | Service Receivable Sale Arrangement | ||||
| Variable Interest Entity [Line Items] | ||||
| Gross receivables | 266 | 286 | ||
| EIP Securitization Arrangement | ||||
| Variable Interest Entity [Line Items] | ||||
| Revolving receivables facility, maximum borrowing capacity | 1,300 | 1,300 | ||
| Factoring Arrangement | Variable Interest Entity, Not Primary Beneficiary | ||||
| Variable Interest Entity [Line Items] | ||||
| Revolving receivables facility, maximum borrowing capacity | 950 | |||
| Revolving receivables facility, outstanding borrowings | 775 | 775 | ||
| Factoring and EIP Securitization Arrangement | Variable Interest Entity, Primary Beneficiary | ||||
| Variable Interest Entity [Line Items] | ||||
| Gross EIP receivables | $ 604 | |||
| Losses from sales of receivables | 58 | 62 | $ 165 | |
| Factoring and EIP Securitization Arrangement | Variable Interest Entity, Primary Beneficiary | Collateral Pledged | EIP Sale Arrangement | ||||
| Variable Interest Entity [Line Items] | ||||
| Gross EIP receivables | 535 | 505 | ||
| Factoring and EIP Securitization Arrangement | Level 3 | Carrying Amount | Variable Interest Entity, Primary Beneficiary | ||||
| Variable Interest Entity [Line Items] | ||||
| Carrying amounts of deferred purchase price assets | $ 130 | $ 148 | ||
Sales of Certain Receivables - Schedule of Variable Interest Entities - EIP (Details) - USD ($) $ in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Variable Interest Entity [Line Items] | ||
| Other current liabilities | $ 2,575 | $ 1,965 |
| EIP Securitization Arrangement | ||
| Variable Interest Entity [Line Items] | ||
| Other current liabilities | 90 | 81 |
| Other long-term liabilities | $ 13 | $ 32 |
Sales of Certain Receivables - Schedule of Variable Interest Entities (Details) - USD ($) $ in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Variable Interest Entity [Line Items] | ||
| Other current liabilities | $ 2,575 | $ 1,965 |
| Variable Interest Entity, Not Primary Beneficiary | Factoring Arrangement | ||
| Variable Interest Entity [Line Items] | ||
| Other current liabilities | $ 306 | $ 328 |
Sales of Certain Receivables - Schedule of Factoring Arrangement (Details) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items] | ||
| Other current liabilities | $ 2,575 | $ 1,965 |
| Other long-term liabilities | 3,794 | 4,000 |
| Factoring and EIP Securitization Arrangement | Variable Interest Entity, Primary Beneficiary | ||
| Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items] | ||
| Derecognized net service accounts receivable and EIP receivables | 1,651 | 1,616 |
| Other current liabilities | 397 | 409 |
| Other long-term liabilities | 13 | 32 |
| Net cash proceeds since inception | 1,372 | 1,468 |
| Of which: | ||
| Change in net cash proceeds during the year-to-date period | (96) | (115) |
| Net cash proceeds funded by reinvested collections | 1,468 | 1,583 |
| Factoring and EIP Securitization Arrangement | Variable Interest Entity, Primary Beneficiary | Other current liabilities - of which, recourse guarantee | ||
| Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items] | ||
| Carrying amounts of deferred purchase price assets | 117 | 116 |
| Factoring and EIP Securitization Arrangement | Variable Interest Entity, Primary Beneficiary | Other long-term liabilities - of which, recourse guarantee | ||
| Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items] | ||
| Carrying amounts of deferred purchase price assets | $ 13 | $ 32 |
Property and Equipment - Schedule of Components of Property and Equipment, Excluding Amounts Transferred to Held for Sale (Details) - USD ($) $ in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Property, Plant and Equipment [Line Items] | ||
| Accumulated depreciation and amortization | $ (63,812) | $ (56,367) |
| Property and equipment, net | 38,333 | 38,533 |
| Land | ||
| Property, Plant and Equipment [Line Items] | ||
| Property and equipment, gross | 100 | 69 |
| Buildings and equipment | ||
| Property, Plant and Equipment [Line Items] | ||
| Property and equipment, gross | 4,521 | 4,377 |
| Wireless communications systems | ||
| Property, Plant and Equipment [Line Items] | ||
| Property and equipment, gross | 70,653 | 65,778 |
| Leasehold improvements | ||
| Property, Plant and Equipment [Line Items] | ||
| Property and equipment, gross | 2,750 | 2,588 |
| Capitalized software | ||
| Property, Plant and Equipment [Line Items] | ||
| Property and equipment, gross | 21,762 | 18,566 |
| Leased wireless devices | ||
| Property, Plant and Equipment [Line Items] | ||
| Property and equipment, gross | 30 | 145 |
| Construction in progress | ||
| Property, Plant and Equipment [Line Items] | ||
| Property and equipment, gross | $ 2,329 | $ 3,377 |
| Maximum | Buildings and equipment | ||
| Property, Plant and Equipment [Line Items] | ||
| Useful Lives | 30 years | |
| Maximum | Wireless communications systems | ||
| Property, Plant and Equipment [Line Items] | ||
| Useful Lives | 20 years | |
| Maximum | Leasehold improvements | ||
| Property, Plant and Equipment [Line Items] | ||
| Useful Lives | 10 years | |
| Maximum | Capitalized software | ||
| Property, Plant and Equipment [Line Items] | ||
| Useful Lives | 3 years | |
| Maximum | Leased wireless devices | ||
| Property, Plant and Equipment [Line Items] | ||
| Useful Lives | 16 months |
Property and Equipment - Narrative (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Property, Plant and Equipment [Line Items] | |||
| Capitalized interest | $ 43 | $ 34 | $ 104 |
| Asset retirement costs capitalized, net | 561 | 423 | |
| Impairment expense | 278 | 0 | 0 |
| Property, Equipment, and Financing Lease Right-of-Use Assets | |||
| Property, Plant and Equipment [Line Items] | |||
| Depreciation and amortization | $ 12,600 | $ 12,100 | $ 12,000 |
Property and Equipment - Schedule of Asset Retirement Obligation (Details) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Asset Retirement Obligation, Roll Forward Analysis [Roll Forward] | ||
| Asset retirement obligations, beginning of year | $ 1,535 | $ 1,716 |
| Fair value of liabilities acquired from the UScellular Acquisition | 182 | 0 |
| Liabilities incurred | 35 | 21 |
| Liabilities settled | (46) | (307) |
| Accretion expense | 73 | 69 |
| Changes in estimated cash flows | 0 | 36 |
| Asset retirement obligations, end of period | 1,779 | 1,535 |
| Classified on the consolidated balance sheets | 1,779 | 1,535 |
| Other current liabilities | ||
| Asset Retirement Obligation, Roll Forward Analysis [Roll Forward] | ||
| Asset retirement obligations, beginning of year | 109 | |
| Asset retirement obligations, end of period | 114 | 109 |
| Classified on the consolidated balance sheets | 114 | 109 |
| Other long-term liabilities | ||
| Asset Retirement Obligation, Roll Forward Analysis [Roll Forward] | ||
| Asset retirement obligations, beginning of year | 1,426 | |
| Asset retirement obligations, end of period | 1,665 | 1,426 |
| Classified on the consolidated balance sheets | $ 1,665 | $ 1,426 |
Goodwill, Spectrum License Transactions and Other Intangible Assets - Schedule of Changes in Carrying Amount of Goodwill (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Goodwill [Roll Forward] | |||
| Beginning balance | $ 13,005 | $ 12,234 | |
| Goodwill | 771 | ||
| Ending balance | 13,678 | $ 13,005 | |
| Accumulated impairment losses | 10,984 | $ 10,984 | |
| Ka Ena Corporation | |||
| Goodwill [Roll Forward] | |||
| Adjustment to goodwill from the Ka’ena Acquisition | 6 | ||
| 2025 Acquisitions | |||
| Goodwill [Roll Forward] | |||
| Goodwill | $ 667 | ||
Goodwill, Spectrum License Transactions and Other Intangible Assets - Schedule of Spectrum Licenses (Details) - Licensing Agreements - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Indefinite-lived Intangible Assets [Roll Forward] | |||
| Spectrum licenses, beginning of year | $ 100,558 | $ 96,707 | $ 95,798 |
| Spectrum license acquisitions | 1,417 | 4,822 | 103 |
| Spectrum licenses acquired from the UScellular Acquisition | 1,730 | 0 | 0 |
| Spectrum licenses transferred to held for sale | (5,674) | (1,024) | (2) |
| Costs to clear spectrum | 1 | 53 | 808 |
| Spectrum licenses, end of year | $ 98,032 | $ 100,558 | $ 96,707 |
Goodwill, Spectrum License Transactions and Other Intangible Assets - Narrative (Details) $ in Millions |
1 Months Ended | 12 Months Ended | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Jun. 02, 2025
USD ($)
|
May 30, 2025
USD ($)
|
Apr. 30, 2025
USD ($)
|
Jan. 13, 2025
USD ($)
|
Dec. 06, 2024
USD ($)
|
Aug. 05, 2024
USD ($)
|
Oct. 15, 2023
USD ($)
|
Sep. 12, 2023
USD ($)
|
Aug. 25, 2023
USD ($)
|
Mar. 30, 2023
tranche
|
Aug. 08, 2022
USD ($)
|
Jul. 01, 2020
USD ($)
|
Sep. 30, 2022
USD ($)
license
|
Jun. 30, 2022
USD ($)
|
Dec. 31, 2025
USD ($)
|
Dec. 31, 2024
USD ($)
|
Dec. 31, 2023
USD ($)
|
Jun. 30, 2026
USD ($)
|
Oct. 25, 2023
USD ($)
|
|
| Finite-Lived Intangible Assets [Line Items] | |||||||||||||||||||
| Purchase of spectrum licenses | $ 2,568 | $ 3,471 | $ 1,010 | ||||||||||||||||
| Spectrum licenses | 98,032 | 100,558 | |||||||||||||||||
| Amortization expense for intangible assets | 975 | 857 | $ 888 | ||||||||||||||||
| Spectrum Licenses | T-Mobile and Sprint | DISH | |||||||||||||||||||
| Finite-Lived Intangible Assets [Line Items] | |||||||||||||||||||
| Payments for asset acquisition | $ 3,600 | $ 3,600 | |||||||||||||||||
| Non-refundable extension fee payable | 100 | ||||||||||||||||||
| Termination fee payable | 72 | ||||||||||||||||||
| Terminate and retain the extension fee | $ 100 | $ 100 | |||||||||||||||||
| Spectrum Licenses | T-Mobile and Sprint | DISH | Selling, General and Administrative Expenses | |||||||||||||||||||
| Finite-Lived Intangible Assets [Line Items] | |||||||||||||||||||
| Extension fee paid | 100 | ||||||||||||||||||
| Licensing Agreements | Channel 51 License Co, LLC and LB License Co, LLC | |||||||||||||||||||
| Finite-Lived Intangible Assets [Line Items] | |||||||||||||||||||
| Total cash consideration | $ 3,500 | $ 3,500 | |||||||||||||||||
| Number of tranches licenses | tranche | 2 | ||||||||||||||||||
| Consideration transferred | $ 541 | $ 2,400 | |||||||||||||||||
| Licensing Agreements | Channel 51 License Co, LLC and LB License Co, LLC | Second Tranche | |||||||||||||||||||
| Finite-Lived Intangible Assets [Line Items] | |||||||||||||||||||
| Total cash consideration | $ 604 | $ 1,100 | |||||||||||||||||
| Licensing Agreements | Comcast Corporation | |||||||||||||||||||
| Finite-Lived Intangible Assets [Line Items] | |||||||||||||||||||
| License purchase agreement, minimum period before termination allowed | 2 years | ||||||||||||||||||
| Licensing Agreements | Comcast Corporation | Minimum | |||||||||||||||||||
| Finite-Lived Intangible Assets [Line Items] | |||||||||||||||||||
| Total cash consideration | $ 1,200 | $ 1,200 | |||||||||||||||||
| Licensing Agreements | Comcast Corporation | Maximum | |||||||||||||||||||
| Finite-Lived Intangible Assets [Line Items] | |||||||||||||||||||
| Total cash consideration | $ 3,400 | 3,300 | |||||||||||||||||
| Licensing Agreements | N77 License Co LLC | |||||||||||||||||||
| Finite-Lived Intangible Assets [Line Items] | |||||||||||||||||||
| Gain on spectrum exchange transactions | 151 | ||||||||||||||||||
| Proceeds from sale of intangible assets | $ 2,000 | ||||||||||||||||||
| Licensing Agreements | Spectrum Licenses | Comcast Corporation | Forecast | |||||||||||||||||||
| Finite-Lived Intangible Assets [Line Items] | |||||||||||||||||||
| Spectrum licenses | $ 45 | ||||||||||||||||||
| Licensing Agreements | Spectrum Licenses | Grain Management, LLC | |||||||||||||||||||
| Finite-Lived Intangible Assets [Line Items] | |||||||||||||||||||
| Total cash consideration | $ 2,900 | ||||||||||||||||||
| Spectrum licenses | 3,600 | ||||||||||||||||||
| Increase our cash tax liability | $ 850 | ||||||||||||||||||
| Licensing Agreements | Spectrum Licenses | Grain Management, LLC | Other current assets - of which, deferred purchase price | |||||||||||||||||||
| Finite-Lived Intangible Assets [Line Items] | |||||||||||||||||||
| Spectrum licenses held for sale | 2,900 | ||||||||||||||||||
| Licensing Agreements | Spectrum Licenses | Grain Management, LLC | Other Assets | |||||||||||||||||||
| Finite-Lived Intangible Assets [Line Items] | |||||||||||||||||||
| Spectrum licenses held for sale | 690 | ||||||||||||||||||
| Licensing Agreements | Spectrum Exchange Transactions | |||||||||||||||||||
| Finite-Lived Intangible Assets [Line Items] | |||||||||||||||||||
| Gain on spectrum exchange transactions | 34 | 202 | |||||||||||||||||
| Spectrum licenses held for sale | 3 | 159 | |||||||||||||||||
| Licensing Agreements | Spectrum Exchange Transactions | Non-Cash Spectrum License Acquisitions | |||||||||||||||||||
| Finite-Lived Intangible Assets [Line Items] | |||||||||||||||||||
| Consideration transferred, exchange of licenses | $ 434 | $ 1,200 | |||||||||||||||||
| Optional Sale Licenses | Comcast Corporation | Minimum | |||||||||||||||||||
| Finite-Lived Intangible Assets [Line Items] | |||||||||||||||||||
| Total cash consideration | $ 2,100 | ||||||||||||||||||
| Auction 108 | |||||||||||||||||||
| Finite-Lived Intangible Assets [Line Items] | |||||||||||||||||||
| Aggregate purchase price | $ 304 | ||||||||||||||||||
| Auction 108 | Licensing Agreements | |||||||||||||||||||
| Finite-Lived Intangible Assets [Line Items] | |||||||||||||||||||
| Number of licenses | license | 7,156 | ||||||||||||||||||
| Purchase of spectrum licenses | $ 239 | $ 65 | |||||||||||||||||
Goodwill, Spectrum License Transactions and Other Intangible Assets - Schedule of Other Intangible Assets and Estimated Aggregate Future Amortization Expense (Details) - USD ($) $ in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Finite-Lived Intangible Assets [Line Items] | ||
| Gross Amount | $ 9,920 | $ 7,633 |
| Accumulated Amortization | (6,077) | (5,121) |
| Net Amount | 3,843 | 2,512 |
| Customer relationships | ||
| Finite-Lived Intangible Assets [Line Items] | ||
| Gross Amount | 7,599 | 5,427 |
| Accumulated Amortization | (4,878) | (4,123) |
| Net Amount | $ 2,721 | 1,304 |
| Customer relationships | Maximum | ||
| Finite-Lived Intangible Assets [Line Items] | ||
| Intangible assets, useful life | 10 years | |
| Reacquired rights | ||
| Finite-Lived Intangible Assets [Line Items] | ||
| Gross Amount | $ 770 | 770 |
| Accumulated Amortization | (416) | (323) |
| Net Amount | $ 354 | 447 |
| Reacquired rights | Maximum | ||
| Finite-Lived Intangible Assets [Line Items] | ||
| Intangible assets, useful life | 9 years | |
| Tradenames and patents | ||
| Finite-Lived Intangible Assets [Line Items] | ||
| Gross Amount | $ 430 | 338 |
| Accumulated Amortization | (191) | (157) |
| Net Amount | $ 239 | 181 |
| Tradenames and patents | Maximum | ||
| Finite-Lived Intangible Assets [Line Items] | ||
| Intangible assets, useful life | 19 years | |
| Favorable spectrum leases | ||
| Finite-Lived Intangible Assets [Line Items] | ||
| Gross Amount | $ 564 | 620 |
| Accumulated Amortization | (184) | (169) |
| Net Amount | $ 380 | 451 |
| Favorable spectrum leases | Maximum | ||
| Finite-Lived Intangible Assets [Line Items] | ||
| Intangible assets, useful life | 27 years | |
| Other | ||
| Finite-Lived Intangible Assets [Line Items] | ||
| Gross Amount | $ 557 | 478 |
| Accumulated Amortization | (408) | (349) |
| Net Amount | $ 149 | $ 129 |
| Other | Maximum | ||
| Finite-Lived Intangible Assets [Line Items] | ||
| Intangible assets, useful life | 10 years |
Goodwill, Spectrum License Transactions and Other Intangible Assets - Schedule of Estimated Aggregate Future Amortization Expense (Details) - USD ($) $ in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Estimated Future Amortization | ||
| 2026 | $ 987 | |
| 2027 | 769 | |
| 2028 | 569 | |
| 2029 | 430 | |
| 2030 | 278 | |
| Thereafter | 810 | |
| Net Amount | $ 3,843 | $ 2,512 |
Fair Value Measurements - Narrative (Details) $ in Millions, € in Billions |
12 Months Ended | |||
|---|---|---|---|---|
|
Dec. 31, 2025
USD ($)
|
Dec. 31, 2024
USD ($)
|
Dec. 31, 2023
USD ($)
|
Dec. 31, 2025
EUR (€)
|
|
| Derivative [Line Items] | ||||
| Other finance liabilities | € | € 4.8 | |||
| Accumulated other comprehensive loss | $ 848 | $ 857 | ||
| Level 3 | Carrying Amount | Variable Interest Entity, Primary Beneficiary | Factoring and EIP Securitization Arrangement | ||||
| Derivative [Line Items] | ||||
| Carrying amounts of deferred purchase price assets | 130 | 148 | ||
| Interest Expense | ||||
| Derivative [Line Items] | ||||
| Amount amortized from AOCI into interest expense | 254 | 236 | $ 219 | |
| Amount expected to be amortized from AOCI into interest expense over next 12 months | 274 | |||
| Cross-Currency Swap | ||||
| Derivative [Line Items] | ||||
| Other finance liabilities | € | € 4.8 | |||
| Amount amortized from AOCI into interest expense | (661) | 79 | ||
| Interest Rate Contract | ||||
| Derivative [Line Items] | ||||
| Accumulated other comprehensive loss | $ 771 | $ 960 | ||
Fair Value Measurements - Schedule of Pretax Cross Currency Swaps (Details) - Cross-Currency Swap - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Derivative Instruments and Hedging Activities Disclosures [Line Items] | ||
| Pre-tax transaction (loss) gain on remeasurement of EUR-denominated debt | $ (661) | $ 79 |
| Amount recognized in Other (expense) income, net reclassified from Accumulated other comprehensive loss | 661 | (79) |
| Gain (loss) associated with the change in fair value of cross-currency swaps recognized in Accumulated other comprehensive loss | 410 | (58) |
| Reclassification out of Accumulated Other Comprehensive Income | ||
| Derivative Instruments and Hedging Activities Disclosures [Line Items] | ||
| Amount recognized in Accumulated other comprehensive loss reclassified to Other (expense) income, net | $ (661) | $ 79 |
Fair Value Measurements - Schedule of Carrying Values and Fair Values of Short-Term and Long-term Debt (Details) - USD ($) $ in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Carrying Amount | Senior Notes | Level 1 | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Long-term debt | $ 74,575 | $ 71,783 |
| Carrying Amount | Senior Notes | Third Party (EUR-denominated) | Level 2 | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Long-term debt | 5,551 | 2,058 |
| Carrying Amount | Senior Notes | Related Party | Level 2 | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Long-term debt | 1,498 | 1,497 |
| Carrying Amount | Senior Secured Notes | Third Party | Level 1 | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Long-term debt | 844 | 1,361 |
| Carrying Amount | ABS Notes | Third Party | Level 2 | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Long-term debt | 1,995 | 1,566 |
| Carrying Amount | ECA Facility | Third Party | Level 2 | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Long-term debt | 1,819 | 0 |
| Fair Value | Senior Notes | Level 1 | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Long-term debt | 70,517 | 65,631 |
| Fair Value | Senior Notes | Third Party (EUR-denominated) | Level 2 | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Long-term debt | 5,460 | 2,125 |
| Fair Value | Senior Notes | Related Party | Level 2 | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Long-term debt | 1,500 | 1,491 |
| Fair Value | Senior Secured Notes | Third Party | Level 1 | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Long-term debt | 835 | 1,330 |
| Fair Value | ABS Notes | Third Party | Level 2 | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Long-term debt | 2,017 | 1,570 |
| Fair Value | ECA Facility | Third Party | Level 2 | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Long-term debt | $ 1,876 | $ 0 |
Debt - Schedule of Debt (Details) $ in Millions, € in Billions |
Jan. 22, 2026 |
Dec. 31, 2025
USD ($)
|
Dec. 31, 2025
EUR (€)
|
Oct. 09, 2025 |
Aug. 05, 2025 |
Mar. 27, 2025 |
Dec. 31, 2024
USD ($)
|
|---|---|---|---|---|---|---|---|
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | € | € 4.8 | ||||||
| Debt issuance costs and consent fees | $ (352) | $ (278) | |||||
| Total debt | 86,282 | 78,265 | |||||
| Long-term debt | 81,147 | 74,197 | |||||
| Affiliates | |||||||
| Debt Instrument [Line Items] | |||||||
| Long-term debt | 1,498 | 1,497 | |||||
| Nonrelated Party | |||||||
| Debt Instrument [Line Items] | |||||||
| Unamortized Premium on debt to third parties | 666 | 775 | |||||
| Unamortized Discount on debt to third parties | (313) | (223) | |||||
| Long-term debt | 79,649 | 72,700 | |||||
| Senior Notes | Nonrelated Party | |||||||
| Debt Instrument [Line Items] | |||||||
| Less: Current portion of Senior Notes | 5,135 | 4,068 | |||||
| 3.500% Senior Notes due 2025 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 0 | 3,000 | |||||
| 3.500% Senior Notes due 2025 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 3.50% | 3.50% | |||||
| 4.738% Series 2018-1 A-1 Notes due 2025 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 0 | 131 | |||||
| 4.738% Series 2018-1 A-1 Notes due 2025 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 4.738% | 4.738% | |||||
| 1.500% Senior Notes due 2026 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 1,000 | 1,000 | |||||
| 1.500% Senior Notes due 2026 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 1.50% | 1.50% | |||||
| 2.250% Senior Notes due 2026 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 1,800 | 1,800 | |||||
| 2.250% Senior Notes due 2026 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 2.25% | 2.25% | |||||
| 2.625% Senior Notes due 2026 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 1,200 | 1,200 | |||||
| 2.625% Senior Notes due 2026 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 2.625% | 2.625% | |||||
| 7.625% Senior Notes due 2026 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 0 | 1,500 | |||||
| 7.625% Senior Notes due 2026 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 7.625% | 7.625% | |||||
| 3.750% Senior Notes due 2027 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 4,000 | 4,000 | |||||
| 3.750% Senior Notes due 2027 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 3.75% | 3.75% | |||||
| 5.375% Senior Notes due 2027 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 0 | 500 | |||||
| 5.375% Senior Notes due 2027 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 5.375% | 5.375% | |||||
| 2.050% Senior Notes due 2028 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 1,750 | 1,750 | |||||
| 2.050% Senior Notes due 2028 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 2.05% | 2.05% | |||||
| 4.750% Senior Notes due 2028 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 1,500 | 1,500 | |||||
| 4.750% Senior Notes due 2028 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 4.75% | 4.75% | |||||
| 4.750% Senior Notes due 2028 | Senior Notes | Subsequent Event | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 4.75% | ||||||
| 4.750% Senior Notes to affiliates due 2028 | Affiliates | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 1,500 | 1,500 | |||||
| 4.800% Senior Notes due 2028 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 900 | 900 | |||||
| 4.800% Senior Notes due 2028 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 4.80% | 4.80% | |||||
| 4.910% Class A Senior ABS Notes due 2025 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 0 | 570 | |||||
| 4.910% Class A Senior ABS Notes due 2025 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 4.91% | 4.91% | |||||
| 4.950% Senior Notes due 2028 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 1,000 | 1,000 | |||||
| 4.950% Senior Notes due 2028 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 4.95% | 4.95% | |||||
| 5.152% Series 2018-1 A-2 Notes due 2028 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 827 | 1,194 | |||||
| 5.152% Series 2018-1 A-2 Notes due 2028 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 5.152% | 5.152% | |||||
| 6.875% Senior Notes due 2028 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 2,475 | 2,475 | |||||
| 6.875% Senior Notes due 2028 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 6.875% | 6.875% | |||||
| 2.400% Senior Notes due 2029 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 500 | 500 | |||||
| 2.400% Senior Notes due 2029 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 2.40% | 2.40% | |||||
| 2.625% Senior Notes due 2029 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 1,000 | 1,000 | |||||
| 2.625% Senior Notes due 2029 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 2.625% | 2.625% | |||||
| 3.375% Senior Notes due 2029 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 2,350 | 2,350 | |||||
| 3.375% Senior Notes due 2029 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 3.375% | 3.375% | |||||
| 3.550% Senior Notes due 2029 (EUR-denominated) | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 705 | 621 | |||||
| 3.550% Senior Notes due 2029 (EUR-denominated) | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 3.55% | 3.55% | |||||
| 4.200% Senior Notes due 2029 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 700 | 700 | |||||
| 4.200% Senior Notes due 2029 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 4.20% | 4.20% | |||||
| 4.250% Class A Senior ABS Notes due 2029 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 500 | 500 | |||||
| 4.250% Class A Senior ABS Notes due 2029 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 4.25% | 4.25% | |||||
| 4.740% Class A Senior ABS Notes due 2029 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 500 | 0 | |||||
| 4.740% Class A Senior ABS Notes due 2029 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 4.74% | 4.74% | |||||
| 4.850% Senior Notes due 2029 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 1,000 | 1,000 | |||||
| 4.850% Senior Notes due 2029 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 4.85% | 4.85% | |||||
| 5.050% Class A Senior ABS Notes due 2029 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 500 | 500 | |||||
| 5.050% Class A Senior ABS Notes due 2029 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 5.05% | 5.05% | |||||
| 3.875% Senior Notes due 2030 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 7,000 | 7,000 | |||||
| 3.875% Senior Notes due 2030 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 3.875% | 3.875% | |||||
| 4.340% Class A Senior ABS Notes due 2030 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 500 | 0 | |||||
| 4.340% Class A Senior ABS Notes due 2030 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 4.34% | 4.34% | |||||
| 2.250% Senior Notes due 2031 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 1,000 | 1,000 | |||||
| 2.250% Senior Notes due 2031 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 2.25% | 2.25% | |||||
| 2.550% Senior Notes due 2031 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 2,500 | 2,500 | |||||
| 2.550% Senior Notes due 2031 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 2.55% | 2.55% | |||||
| 2.875% Senior Notes due 2031 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 1,000 | 1,000 | |||||
| 2.875% Senior Notes due 2031 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 2.875% | 2.875% | |||||
| 3.500% Senior Notes due 2031 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 2,450 | 2,450 | |||||
| 3.500% Senior Notes due 2031 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 3.50% | 3.50% | |||||
| 2.700% Senior Notes due 2032 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 1,000 | 1,000 | |||||
| 2.700% Senior Notes due 2032 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 2.70% | 2.70% | |||||
| 3.150% Senior Notes due 2032 (EUR-denominated) | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 1,175 | 0 | |||||
| 3.150% Senior Notes due 2032 (EUR-denominated) | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 3.15% | 3.15% | |||||
| 3.700% Senior Notes due 2032 (EUR-denominated) | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 881 | 777 | |||||
| 3.700% Senior Notes due 2032 (EUR-denominated) | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 3.70% | 3.70% | |||||
| 5.125% Senior Notes due 2032 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 1,250 | 0 | |||||
| 5.125% Senior Notes due 2032 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 5.125% | 5.125% | 5.125% | ||||
| 8.750% Senior Notes due 2032 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 2,000 | 2,000 | |||||
| 8.750% Senior Notes due 2032 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 8.75% | 8.75% | |||||
| 4.625% Senior Notes due 2033 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 800 | 0 | |||||
| 4.625% Senior Notes due 2033 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 4.625% | 4.625% | 4.625% | ||||
| 5.050% Senior Notes due 2033 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 2,600 | 2,600 | |||||
| 5.050% Senior Notes due 2033 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 5.05% | 5.05% | |||||
| 5.200% Senior Notes due 2033 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 1,250 | 1,250 | |||||
| 5.200% Senior Notes due 2033 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 5.20% | 5.20% | |||||
| 6.700% Senior Notes due 2033 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 489 | 0 | |||||
| 6.700% Senior Notes due 2033 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 6.70% | 6.70% | 6.70% | ||||
| 5.150% Senior Notes due 2034 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 1,250 | 1,250 | |||||
| 5.150% Senior Notes due 2034 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 5.15% | 5.15% | |||||
| 5.750% Senior Notes due 2034 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 1,000 | 1,000 | |||||
| 5.750% Senior Notes due 2034 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 5.75% | 5.75% | |||||
| 4.700% Senior Notes due 2035 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 900 | 900 | |||||
| 4.700% Senior Notes due 2035 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 4.70% | 4.70% | |||||
| 4.950% Senior Notes due 2035 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 1,000 | 0 | |||||
| 4.950% Senior Notes due 2035 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 4.95% | 4.95% | 4.95% | ||||
| 5.300% Senior Notes due 2035 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 1,000 | 0 | |||||
| 5.300% Senior Notes due 2035 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 5.30% | 5.30% | 5.30% | ||||
| ECA Facility due November 2036 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 957 | 0 | |||||
| 3.850% Senior Notes due 2036 (EUR-denominated) | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 764 | 673 | |||||
| 3.850% Senior Notes due 2036 (EUR-denominated) | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 3.85% | 3.85% | |||||
| 3.500% Senior Notes due 2037 (EUR-denominated) | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 1,175 | 0 | |||||
| 3.500% Senior Notes due 2037 (EUR-denominated) | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 3.50% | 3.50% | |||||
| 4.375% Senior Notes due 2040 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 2,000 | 2,000 | |||||
| 4.375% Senior Notes due 2040 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 4.375% | 4.375% | |||||
| 3.000% Senior Notes due 2041 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 2,500 | 2,500 | |||||
| 3.000% Senior Notes due 2041 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 3.00% | 3.00% | |||||
| 3.800% Senior Notes due 2045 (EUR-denominated) | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 881 | 0 | |||||
| 3.800% Senior Notes due 2045 (EUR-denominated) | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 3.80% | 3.80% | |||||
| 4.500% Senior Notes due 2050 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 3,000 | 3,000 | |||||
| 4.500% Senior Notes due 2050 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 4.50% | 4.50% | |||||
| 3.300% Senior Notes due 2051 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 3,000 | 3,000 | |||||
| 3.300% Senior Notes due 2051 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 3.30% | 3.30% | |||||
| 3.400% Senior Notes due 2052 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 2,800 | 2,800 | |||||
| 3.400% Senior Notes due 2052 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 3.40% | 3.40% | |||||
| 5.650% Senior Notes due 2053 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 1,750 | 1,750 | |||||
| 5.650% Senior Notes due 2053 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 5.65% | 5.65% | |||||
| 5.750% Senior Notes due 2054 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 1,250 | 1,250 | |||||
| 5.750% Senior Notes due 2054 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 5.75% | 5.75% | |||||
| 6.000% Senior Notes due 2054 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 1,000 | 1,000 | |||||
| 6.000% Senior Notes due 2054 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 6.00% | 6.00% | |||||
| 5.250% Senior Notes due 2055 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 900 | 900 | |||||
| 5.250% Senior Notes due 2055 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 5.25% | 5.25% | |||||
| 5.500% Senior Notes due 2055 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 750 | 750 | |||||
| 5.500% Senior Notes due 2055 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 5.50% | 5.50% | |||||
| 5.875% Senior Notes due 2055 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 1,250 | 0 | |||||
| 5.875% Senior Notes due 2055 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 5.875% | 5.875% | 5.875% | ||||
| 5.700% Senior Notes due 2056 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 1,000 | 0 | |||||
| 5.700% Senior Notes due 2056 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 5.70% | 5.70% | 5.70% | ||||
| 3.600% Senior Notes due 2060 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 1,700 | 1,700 | |||||
| 3.600% Senior Notes due 2060 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 3.60% | 3.60% | |||||
| 5.800% Senior Notes due 2062 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 750 | 750 | |||||
| 5.800% Senior Notes due 2062 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 5.80% | 5.80% | |||||
| 6.250% Senior Notes due 2069 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 393 | 0 | |||||
| 6.250% Senior Notes due 2069 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 6.25% | 6.25% | 6.25% | ||||
| 5.500% Senior Notes due March 2070 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 401 | 0 | |||||
| 5.500% Senior Notes due March 2070 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 5.50% | 5.50% | 5.50% | ||||
| 5.500% Senior Notes due June 2070 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 395 | 0 | |||||
| 5.500% Senior Notes due June 2070 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 5.50% | 5.50% | 5.50% | ||||
| ECA Facility due March 2036 | |||||||
| Debt Instrument [Line Items] | |||||||
| Other finance liabilities | $ 913 | $ 0 | |||||
| ECA Facility due March 2036 | Senior Notes | |||||||
| Debt Instrument [Line Items] | |||||||
| Interest rate, stated percentage | 4.927% | 4.927% |
Debt - Narrative (Details) |
12 Months Ended | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
Apr. 01, 2020
USD ($)
instrument
|
Dec. 31, 2025
USD ($)
|
Dec. 31, 2024
USD ($)
|
Feb. 05, 2026
USD ($)
|
Jan. 22, 2026
USD ($)
|
Jan. 12, 2026
USD ($)
|
Jan. 05, 2026
USD ($)
|
Aug. 29, 2025
USD ($)
|
Mar. 17, 2025
USD ($)
|
Jan. 31, 2025
USD ($)
|
Jul. 25, 2023
USD ($)
|
|
| Debt Instrument [Line Items] | |||||||||||
| Effective interest rate | 4.20% | 4.10% | |||||||||
| Weighted-average debt outstanding during period | $ 83,000,000,000 | $ 78,300,000,000 | |||||||||
| Principal outstanding | 13,827,000,000 | ||||||||||
| Debt instrument, repurchased face amount | 1,199,000,000 | ||||||||||
| Proceeds from loan facility | 86,282,000,000 | 78,265,000,000 | |||||||||
| Short-term debt | 5,135,000,000 | 4,068,000,000 | |||||||||
| Letters of credit, amount outstanding | 116,000,000 | 152,000,000 | |||||||||
| Spectrum Financing Special Purpose Entity | |||||||||||
| Debt Instrument [Line Items] | |||||||||||
| Lease payments (per month) | $ 165,000,000 | ||||||||||
| Sprint | |||||||||||
| Debt Instrument [Line Items] | |||||||||||
| Total outstanding obligation | 827,000,000 | 1,300,000,000 | |||||||||
| Revolving Credit Facility | |||||||||||
| Debt Instrument [Line Items] | |||||||||||
| Credit facility outstanding balance | 0 | 0 | |||||||||
| Senior Notes | |||||||||||
| Debt Instrument [Line Items] | |||||||||||
| Principal outstanding | 10,827,000,000 | ||||||||||
| Senior Notes | Sprint | |||||||||||
| Debt Instrument [Line Items] | |||||||||||
| Principal outstanding | 3,900,000,000 | ||||||||||
| Line of Credit | Revolving Credit Facility | |||||||||||
| Debt Instrument [Line Items] | |||||||||||
| Financing commitment, amount | 7,500,000,000 | ||||||||||
| Line of Credit | Revolving Credit Facility | Subsequent Event | |||||||||||
| Debt Instrument [Line Items] | |||||||||||
| Financing commitment, amount | $ 10,000,000,000 | ||||||||||
| Line of Credit | Letter of Credit | |||||||||||
| Debt Instrument [Line Items] | |||||||||||
| Financing commitment, amount | 1,500,000,000 | ||||||||||
| Line of Credit | Bridge Loan | |||||||||||
| Debt Instrument [Line Items] | |||||||||||
| Financing commitment, amount | 500,000,000 | ||||||||||
| ABS Notes | |||||||||||
| Debt Instrument [Line Items] | |||||||||||
| Principal outstanding | $ 1,000,000,000 | ||||||||||
| Expected weighted average life | 2 years 6 months | ||||||||||
| Payable term | 2 years | ||||||||||
| Proceeds from loan facility | $ 2,000,000,000 | ||||||||||
| Gross EIP receivables | 2,600,000,000 | ||||||||||
| Commercial Paper | |||||||||||
| Debt Instrument [Line Items] | |||||||||||
| Financing commitment, amount | $ 2,000,000,000 | ||||||||||
| Short-term debt | 0 | $ 0 | |||||||||
| Loans Payable | |||||||||||
| Debt Instrument [Line Items] | |||||||||||
| Principal outstanding | 2,000,000,000 | ||||||||||
| Financing commitment, amount | $ 1,000,000,000 | ||||||||||
| 5.000% Senior Notes due 2036 | Subsequent Event | |||||||||||
| Debt Instrument [Line Items] | |||||||||||
| Principal outstanding | $ 1,200,000,000 | ||||||||||
| Interest rate, stated percentage | 5.00% | ||||||||||
| 5.850% Senior Notes due 2056 | Subsequent Event | |||||||||||
| Debt Instrument [Line Items] | |||||||||||
| Principal outstanding | $ 850,000,000 | ||||||||||
| Interest rate, stated percentage | 5.85% | ||||||||||
| 4.750% Senior Notes due 2028 | Senior Notes | |||||||||||
| Debt Instrument [Line Items] | |||||||||||
| Interest rate, stated percentage | 4.75% | ||||||||||
| 4.750% Senior Notes due 2028 | Senior Notes | Subsequent Event | |||||||||||
| Debt Instrument [Line Items] | |||||||||||
| Interest rate, stated percentage | 4.75% | ||||||||||
| Debt instrument, repurchased face amount | $ 3,000,000,000 | ||||||||||
| 3.360% Senior Secured Series 2016-1 A-1 Notes due 2021 | Senior Notes | Sprint | |||||||||||
| Debt Instrument [Line Items] | |||||||||||
| Principal outstanding | $ 3,500,000,000 | ||||||||||
| Interest rate, stated percentage | 3.36% | ||||||||||
| Payable term | 5 years | ||||||||||
| Securitization program amount | $ 7,000,000,000 | ||||||||||
| Number of instruments | instrument | 2 | ||||||||||
| 4.738% Series 2018-1 A-1 Notes due 2025 | Sprint | |||||||||||
| Debt Instrument [Line Items] | |||||||||||
| Principal outstanding | $ 2,100,000,000 | ||||||||||
| 4.738% Series 2018-1 A-1 Notes due 2025 | Senior Notes | |||||||||||
| Debt Instrument [Line Items] | |||||||||||
| Interest rate, stated percentage | 4.738% | ||||||||||
| 5.200% Senior Notes due 2033 | Sprint | |||||||||||
| Debt Instrument [Line Items] | |||||||||||
| Short-term debt | $ 368,000,000 | ||||||||||
| 5.200% Senior Notes due 2033 | Senior Notes | Sprint | |||||||||||
| Debt Instrument [Line Items] | |||||||||||
| Principal outstanding | $ 1,800,000,000 | ||||||||||
| 5.152% Series 2018-1 A-2 Notes due 2028 | Senior Notes | |||||||||||
| Debt Instrument [Line Items] | |||||||||||
| Interest rate, stated percentage | 5.152% | ||||||||||
| 4.927% ECA Facility due March 2036 | Loans Payable | |||||||||||
| Debt Instrument [Line Items] | |||||||||||
| Principal outstanding | $ 1,000,000,000 | ||||||||||
| Interest rate, stated percentage | 4.927% | ||||||||||
| Financing commitment, amount | $ 1,000,000,000.0 | ||||||||||
| ECA Facility due November 2036 | Loans Payable | |||||||||||
| Debt Instrument [Line Items] | |||||||||||
| Financing commitment, amount | $ 1,000,000,000 | ||||||||||
| Notes Payable, Other Payables | Subsequent Event | |||||||||||
| Debt Instrument [Line Items] | |||||||||||
| Principal outstanding | $ 1,000,000,000 | ||||||||||
| Minimum | Senior Secured Notes Issued in 2021 | Senior Notes | |||||||||||
| Debt Instrument [Line Items] | |||||||||||
| Term preceding maturity date | 1 month | ||||||||||
| Maximum | Senior Secured Notes Issued in 2021 | Senior Notes | |||||||||||
| Debt Instrument [Line Items] | |||||||||||
| Term preceding maturity date | 3 years | ||||||||||
Debt - Schedule of Issuances and Borrowings (Details) - USD ($) |
12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Dec. 18, 2025 |
Nov. 28, 2025 |
Oct. 09, 2025 |
Aug. 06, 2025 |
Aug. 05, 2025 |
Mar. 27, 2025 |
Mar. 17, 2025 |
Feb. 27, 2025 |
Feb. 11, 2025 |
Dec. 31, 2025 |
|
| Debt Instrument [Line Items] | ||||||||||
| Principal Issuances | $ 13,827,000,000 | |||||||||
| Discounts/Premiums and Issuance Costs, Net | (161,000,000) | |||||||||
| Net Proceeds from Issuance of Long-Term Debt | 12,013,000,000 | |||||||||
| UScellular Wireless Assets Operations | Master License Agreement | ||||||||||
| Debt Instrument [Line Items] | ||||||||||
| Principal Issuances | $ 1,700,000,000 | |||||||||
| Senior Notes | ||||||||||
| Debt Instrument [Line Items] | ||||||||||
| Principal Issuances | 10,827,000,000 | |||||||||
| Discounts/Premiums and Issuance Costs, Net | (103,000,000) | |||||||||
| Net Proceeds from Issuance of Long-Term Debt | 9,071,000,000 | |||||||||
| ABS Notes | ||||||||||
| Debt Instrument [Line Items] | ||||||||||
| Principal Issuances | 1,000,000,000 | |||||||||
| Discounts/Premiums and Issuance Costs, Net | (4,000,000) | |||||||||
| Net Proceeds from Issuance of Long-Term Debt | 996,000,000 | |||||||||
| Loans Payable | ||||||||||
| Debt Instrument [Line Items] | ||||||||||
| Principal Issuances | 2,000,000,000 | |||||||||
| Discounts/Premiums and Issuance Costs, Net | (54,000,000) | |||||||||
| Net Proceeds from Issuance of Long-Term Debt | $ 1,946,000,000 | |||||||||
| 3.150% Senior Notes due 2032 | Senior Notes | ||||||||||
| Debt Instrument [Line Items] | ||||||||||
| Interest rate, stated percentage | 3.15% | |||||||||
| Principal Issuances | $ 1,036,000,000 | |||||||||
| Discounts/Premiums and Issuance Costs, Net | (5,000,000) | |||||||||
| Net Proceeds from Issuance of Long-Term Debt | $ 1,031,000,000 | |||||||||
| 3.500% Senior Notes due 2037 | Senior Notes | ||||||||||
| Debt Instrument [Line Items] | ||||||||||
| Interest rate, stated percentage | 3.50% | |||||||||
| Principal Issuances | $ 1,036,000,000 | |||||||||
| Discounts/Premiums and Issuance Costs, Net | (8,000,000) | |||||||||
| Net Proceeds from Issuance of Long-Term Debt | $ 1,028,000,000 | |||||||||
| 3.800% Senior Notes due 2045 | Senior Notes | ||||||||||
| Debt Instrument [Line Items] | ||||||||||
| Interest rate, stated percentage | 3.80% | |||||||||
| Principal Issuances | $ 777,000,000 | |||||||||
| Discounts/Premiums and Issuance Costs, Net | (7,000,000) | |||||||||
| Net Proceeds from Issuance of Long-Term Debt | $ 770,000,000 | |||||||||
| 5.125% Senior Notes due 2032 | Senior Notes | ||||||||||
| Debt Instrument [Line Items] | ||||||||||
| Interest rate, stated percentage | 5.125% | 5.125% | ||||||||
| Principal Issuances | $ 1,250,000,000 | |||||||||
| Discounts/Premiums and Issuance Costs, Net | (7,000,000) | |||||||||
| Net Proceeds from Issuance of Long-Term Debt | $ 1,243,000,000 | |||||||||
| 5.300% Senior Notes due 2035 | Senior Notes | ||||||||||
| Debt Instrument [Line Items] | ||||||||||
| Interest rate, stated percentage | 5.30% | 5.30% | ||||||||
| Principal Issuances | $ 1,000,000,000 | |||||||||
| Discounts/Premiums and Issuance Costs, Net | (7,000,000) | |||||||||
| Net Proceeds from Issuance of Long-Term Debt | $ 993,000,000 | |||||||||
| 5.875% Senior Notes due 2055 | Senior Notes | ||||||||||
| Debt Instrument [Line Items] | ||||||||||
| Interest rate, stated percentage | 5.875% | 5.875% | ||||||||
| Principal Issuances | $ 1,250,000,000 | |||||||||
| Discounts/Premiums and Issuance Costs, Net | (15,000,000) | |||||||||
| Net Proceeds from Issuance of Long-Term Debt | $ 1,235,000,000 | |||||||||
| 6.700% Senior Notes due 2033 | Senior Notes | ||||||||||
| Debt Instrument [Line Items] | ||||||||||
| Interest rate, stated percentage | 6.70% | 6.70% | ||||||||
| Principal Issuances | $ 489,000,000 | |||||||||
| Discounts/Premiums and Issuance Costs, Net | 56,000,000 | |||||||||
| Net Proceeds from Issuance of Long-Term Debt | $ 0 | |||||||||
| 6.250% Senior Notes due 2069 | Senior Notes | ||||||||||
| Debt Instrument [Line Items] | ||||||||||
| Interest rate, stated percentage | 6.25% | 6.25% | ||||||||
| Principal Issuances | $ 393,000,000 | |||||||||
| Discounts/Premiums and Issuance Costs, Net | 3,000,000 | |||||||||
| Net Proceeds from Issuance of Long-Term Debt | $ 0 | |||||||||
| 5.500% Senior Notes due March 2070 | Senior Notes | ||||||||||
| Debt Instrument [Line Items] | ||||||||||
| Interest rate, stated percentage | 5.50% | 5.50% | ||||||||
| Principal Issuances | $ 401,000,000 | |||||||||
| Discounts/Premiums and Issuance Costs, Net | (42,000,000) | |||||||||
| Net Proceeds from Issuance of Long-Term Debt | $ 0 | |||||||||
| 5.500% Senior Notes due June 2070 | Senior Notes | ||||||||||
| Debt Instrument [Line Items] | ||||||||||
| Interest rate, stated percentage | 5.50% | 5.50% | ||||||||
| Principal Issuances | $ 395,000,000 | |||||||||
| Discounts/Premiums and Issuance Costs, Net | (42,000,000) | |||||||||
| Net Proceeds from Issuance of Long-Term Debt | $ 0 | |||||||||
| 4.625% Senior Notes due 2033 | Senior Notes | ||||||||||
| Debt Instrument [Line Items] | ||||||||||
| Interest rate, stated percentage | 4.625% | 4.625% | ||||||||
| Principal Issuances | $ 800,000,000 | |||||||||
| Discounts/Premiums and Issuance Costs, Net | (5,000,000) | |||||||||
| Net Proceeds from Issuance of Long-Term Debt | $ 795,000,000 | |||||||||
| 4.950% Senior Notes due 2035 | Senior Notes | ||||||||||
| Debt Instrument [Line Items] | ||||||||||
| Interest rate, stated percentage | 4.95% | 4.95% | ||||||||
| Principal Issuances | $ 1,000,000,000 | |||||||||
| Discounts/Premiums and Issuance Costs, Net | (9,000,000) | |||||||||
| Net Proceeds from Issuance of Long-Term Debt | $ 991,000,000 | |||||||||
| 5.700% Senior Notes due 2056 | Senior Notes | ||||||||||
| Debt Instrument [Line Items] | ||||||||||
| Interest rate, stated percentage | 5.70% | 5.70% | ||||||||
| Principal Issuances | $ 1,000,000,000 | |||||||||
| Discounts/Premiums and Issuance Costs, Net | (15,000,000) | |||||||||
| Net Proceeds from Issuance of Long-Term Debt | $ 985,000,000 | |||||||||
| 4.740% Class A Senior ABS Notes due 2029 | Senior Notes | ||||||||||
| Debt Instrument [Line Items] | ||||||||||
| Interest rate, stated percentage | 4.74% | |||||||||
| 4.740% Class A Senior ABS Notes due 2029 | ABS Notes due 2029 | ||||||||||
| Debt Instrument [Line Items] | ||||||||||
| Interest rate, stated percentage | 4.74% | |||||||||
| Principal Issuances | $ 500,000,000 | |||||||||
| Discounts/Premiums and Issuance Costs, Net | (2,000,000) | |||||||||
| Net Proceeds from Issuance of Long-Term Debt | $ 498,000,000 | |||||||||
| 4.340% Class A Senior ABS Notes due 2030 | Senior Notes | ||||||||||
| Debt Instrument [Line Items] | ||||||||||
| Interest rate, stated percentage | 4.34% | |||||||||
| 4.340% Class A Senior ABS Notes due 2030 | ABS Notes Due 2030 | ||||||||||
| Debt Instrument [Line Items] | ||||||||||
| Interest rate, stated percentage | 4.34% | |||||||||
| Principal Issuances | $ 500,000,000 | |||||||||
| Discounts/Premiums and Issuance Costs, Net | (2,000,000) | |||||||||
| Net Proceeds from Issuance of Long-Term Debt | $ 498,000,000 | |||||||||
| 4.927% ECA Facility due March 2036 | Loans Payable | ||||||||||
| Debt Instrument [Line Items] | ||||||||||
| Interest rate, stated percentage | 4.927% | |||||||||
| Principal Issuances | $ 1,000,000,000 | |||||||||
| Discounts/Premiums and Issuance Costs, Net | (30,000,000) | |||||||||
| Net Proceeds from Issuance of Long-Term Debt | $ 970,000,000 | |||||||||
| ECA Facility due November 2036 1 | Loans Payable | ||||||||||
| Debt Instrument [Line Items] | ||||||||||
| Interest rate, stated percentage | 4.502% | |||||||||
| Principal Issuances | $ 500,000,000 | |||||||||
| Discounts/Premiums and Issuance Costs, Net | (13,000,000) | |||||||||
| Net Proceeds from Issuance of Long-Term Debt | $ 487,000,000 | |||||||||
| ECA Facility due November 2036 2 | Loans Payable | ||||||||||
| Debt Instrument [Line Items] | ||||||||||
| Interest rate, stated percentage | 4.392% | |||||||||
| Principal Issuances | $ 500,000,000 | |||||||||
| Discounts/Premiums and Issuance Costs, Net | (11,000,000) | |||||||||
| Net Proceeds from Issuance of Long-Term Debt | $ 489,000,000 |
Debt - Schedule of Repayments (Details) - USD ($) |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Nov. 28, 2025 |
|
| Debt Instrument [Line Items] | ||
| Principal Amount | $ 1,199,000,000 | |
| Write-off of Issuance Cost and Consent Fees | 0 | |
| Total Redemptions | ||
| Debt Instrument [Line Items] | ||
| Principal amount redeemed | 5,000,000,000 | |
| Write-off of Issuance Cost and Consent Fees | $ (12,000,000) | |
| Senior Notes | 3.500% Senior Notes due 2025 | ||
| Debt Instrument [Line Items] | ||
| Interest rate, stated percentage | 3.50% | |
| Principal Amount | $ 3,000,000,000 | |
| Write-off of Issuance Cost and Consent Fees | $ 0 | |
| Senior Notes | 5.375% Senior Notes due 2027 | ||
| Debt Instrument [Line Items] | ||
| Interest rate, stated percentage | 5.375% | |
| Principal Amount | $ 500,000,000 | |
| Write-off of Issuance Cost and Consent Fees | $ 1,000,000 | |
| Redemption Price | 100.00% | |
| Senior Notes | 7.625% Senior Notes due 2026 | ||
| Debt Instrument [Line Items] | ||
| Interest rate, stated percentage | 7.625% | |
| Principal Amount | $ 1,500,000,000 | |
| Write-off of Issuance Cost and Consent Fees | $ (13,000,000) | |
| Redemption Price | 100.00% | |
| Senior Notes | 4.738% Secured Series 2018-1 A-1 Notes due 2025 | ||
| Debt Instrument [Line Items] | ||
| Interest rate, stated percentage | 4.738% | |
| Principal Amount | $ 131,000,000 | |
| Write-off of Issuance Cost and Consent Fees | $ 0 | |
| Senior Notes | 5.152% Series 2018-1 A-2 Notes due 2028 | ||
| Debt Instrument [Line Items] | ||
| Interest rate, stated percentage | 5.152% | |
| Principal Amount | $ 368,000,000 | |
| Write-off of Issuance Cost and Consent Fees | $ 0 | |
| Senior Notes | 4.910% Class A Senior ABS Notes due 2025 | ||
| Debt Instrument [Line Items] | ||
| Interest rate, stated percentage | 4.91% | |
| Principal Amount | $ 570,000,000 | |
| Write-off of Issuance Cost and Consent Fees | 0 | |
| Loans Payable | ECA Facility due March 2036 | ||
| Debt Instrument [Line Items] | ||
| Principal Amount | 87,000,000 | |
| Write-off of Issuance Cost and Consent Fees | 0 | |
| Loans Payable | ECA Facility due November 2036 1 | ||
| Debt Instrument [Line Items] | ||
| Interest rate, stated percentage | 4.502% | |
| Principal Amount | 43,000,000 | |
| Write-off of Issuance Cost and Consent Fees | $ 0 |
Debt - Schedule of Maturities of ABS Notes (Details) - USD ($) $ in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Debt Instrument [Line Items] | ||
| Total debt | $ 86,282 | $ 78,265 |
| ABS Notes | ||
| Debt Instrument [Line Items] | ||
| 2026 | 594 | |
| 2027 | 1,050 | |
| 2028 | 356 | |
| Total debt | $ 2,000 |
Debt - Schedule of Variable Interest Entities (Details) - USD ($) $ in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Debt Instrument [Line Items] | ||
| Equipment installment plan receivables, net | $ 4,997 | $ 4,379 |
| Equipment installment plan receivables due after one year, net | 2,683 | 2,209 |
| Other current assets | 5,372 | 1,853 |
| Accounts payable and accrued liabilities | 10,280 | 8,463 |
| Short-term debt | 5,135 | 4,068 |
| Long-term debt | 81,147 | 74,197 |
| Variable Interest Entity, Primary Beneficiary | ||
| Debt Instrument [Line Items] | ||
| Equipment installment plan receivables, net | 1,865 | 1,472 |
| Equipment installment plan receivables due after one year, net | 543 | 352 |
| Other current assets | 232 | 151 |
| Accounts payable and accrued liabilities | 3 | 2 |
| Short-term debt | 594 | 570 |
| Long-term debt | $ 1,401 | $ 996 |
Tower Obligations - Narrative (Details) $ in Millions |
12 Months Ended | |||
|---|---|---|---|---|
|
Jan. 03, 2022
USD ($)
|
Apr. 01, 2020
USD ($)
tower_site
renewal_option
|
Dec. 31, 2012
USD ($)
tower_site
|
Dec. 31, 2025
USD ($)
tower_site
|
|
| Sale Leaseback Transaction [Line Items] | ||||
| Number of renewal options | renewal_option | 0 | |||
| Tower obligation payments, due next year | $ 389 | |||
| Tower obligation payments, due within two and three years | 810 | |||
| Tower obligation payment, due within four and five years | 862 | |||
| Tower obligation payments due thereafter | 3,200 | |||
| Lease liability | $ 30,185 | |||
| Minimum | ||||
| Sale Leaseback Transaction [Line Items] | ||||
| Lessee leasing arrangements, operating leases, term of contract (years) | 5 years | |||
| Maximum | ||||
| Sale Leaseback Transaction [Line Items] | ||||
| Lessee leasing arrangements, operating leases, term of contract (years) | 15 years | |||
| Tower Transaction | ||||
| Sale Leaseback Transaction [Line Items] | ||||
| Lessee leasing arrangements, operating leases, term of contract (years) | 12 years | |||
| Sale leaseback transaction, fixed-price purchase options | $ 2,000 | |||
| Interest rate on tower obligations | 11.60% | |||
| Tower Transaction | Tower | ||||
| Sale Leaseback Transaction [Line Items] | ||||
| Useful life (years) | 20 years | |||
| Tower Transaction | Minimum | ||||
| Sale Leaseback Transaction [Line Items] | ||||
| Lessee leasing arrangements, operating leases, term of contract (years) | 23 years | |||
| Tower Transaction | Maximum | ||||
| Sale Leaseback Transaction [Line Items] | ||||
| Lessee leasing arrangements, operating leases, term of contract (years) | 37 years | |||
| CCI Tower Lease Arrangement | Crown Castle International Corp. | ||||
| Sale Leaseback Transaction [Line Items] | ||||
| Interest rate on tower obligations | 5.30% | |||
| Crown Castle International Corp. | ||||
| Sale Leaseback Transaction [Line Items] | ||||
| Increase to deferred tax liabilities | $ 1,200 | |||
| Managed sites | tower_site | 900 | |||
| Lease liability | $ 241 | |||
| Crown Castle International Corp. | Tower Transaction | ||||
| Sale Leaseback Transaction [Line Items] | ||||
| Property subject to failed sale leaseback transaction, number of units | tower_site | 6,400 | 6,200 | ||
| Remaining term of lease | 17 years | |||
| Fixed-price purchase option on leased or subleased sites | $ 2,300 | |||
| Fixed-price purchase option on lease or subleased sites, exercisable period | 1 year | |||
| Days prior to expiration of agreement | 120 days |
Tower Obligations - Schedule of Impacts to Consolidated Balance Sheets (Details) - USD ($) $ in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Property and equipment, net | ||
| Sale Leaseback Transaction [Line Items] | ||
| Sale-leasebacks | $ 1,922 | $ 2,069 |
| Tower obligations | ||
| Sale Leaseback Transaction [Line Items] | ||
| Sale-leasebacks | 3,532 | 3,664 |
| Other long-term liabilities | ||
| Sale Leaseback Transaction [Line Items] | ||
| Sale-leasebacks | $ 554 | $ 554 |
Revenue from Contracts with Customers - Schedule of Disaggregation of Revenue (Details) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2025
USD ($)
customer_category
|
Dec. 31, 2024
USD ($)
|
Dec. 31, 2023
USD ($)
|
|
| Disaggregation of Revenue [Line Items] | |||
| Number of customer categories | customer_category | 2 | ||
| Total revenues | $ 88,309 | $ 81,400 | $ 78,558 |
| Postpaid phone revenues | |||
| Disaggregation of Revenue [Line Items] | |||
| Total revenues | 49,443 | 45,762 | 43,449 |
| Postpaid other revenues | |||
| Disaggregation of Revenue [Line Items] | |||
| Total revenues | 8,489 | 6,578 | 5,243 |
| Total postpaid service revenues | |||
| Disaggregation of Revenue [Line Items] | |||
| Total revenues | $ 57,932 | $ 52,340 | $ 48,692 |
Revenue from Contracts with Customers - Schedule of Contract Liability and Receivable Balances (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Revenue from Contract with Customer [Abstract] | |||
| Contract Assets | $ 1,307 | $ 720 | |
| Contract Liabilities | 1,653 | 1,219 | |
| Change in contract assets included in other current assets | 587 | ||
| Change in contracts liabilities included in deferred revenue | 434 | ||
| Current portion of contract assets | 920 | 492 | |
| Amounts included in the beginning of year contract liability balance | $ 1,173 | $ 787 | $ 747 |
Revenue from Contracts with Customers - Remaining Performance Obligations, Branded Postpaid Contracts (Details) $ in Millions |
12 Months Ended |
|---|---|
|
Dec. 31, 2025
USD ($)
| |
| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01 | |
| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | |
| Remaining performance obligation | $ 1,200 |
| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01 | |
| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | |
| Remaining performance obligation | 938 |
| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01 | |
| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | |
| Remaining performance obligation | $ 2,200 |
| Minimum | |
| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | |
| Remaining contract duration (in years) | 1 year |
| Maximum | |
| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | |
| Remaining contract duration (in years) | 6 years |
| Total postpaid service revenues | |
| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | |
| Remaining performance obligation | $ 2,700 |
| Remaining contract duration (in years) | 24 months |
Revenue from Contracts with Customers - Contract Costs (Details) - USD ($) |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Capitalized Contract Cost [Abstract] | |||
| Deferred incremental costs to obtain contracts | $ 2,000,000,000.0 | $ 2,000,000,000.0 | |
| Average amortization period, deferred contract costs (in months) | 24 months | ||
| Amortization of deferred costs | $ 1,900,000,000 | 2,000,000,000 | $ 1,800,000,000 |
| Impairment losses recognized on deferred contract cost assets | $ 0 | $ 0 | $ 0 |
Revenue from Contracts with Customers - Remaining Performance Obligations (Details) |
Dec. 31, 2025 |
|---|---|
| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01 | |
| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | |
| Remaining performance obligation, expected timing of satisfaction, period | 1 year |
| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01 | |
| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | |
| Remaining performance obligation, expected timing of satisfaction, period | 1 year |
| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01 | |
| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | |
| Remaining performance obligation, expected timing of satisfaction, period |
Segment Reporting (Details) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2025
USD ($)
segment
|
Dec. 31, 2024
USD ($)
|
Dec. 31, 2023
USD ($)
|
|
| Segment Reporting [Abstract] | |||
| Number of operating segments | segment | 1 | ||
| Number of reportable segments | segment | 1 | ||
| Segment Reporting Information [Line Items] | |||
| Total revenues | $ 88,309 | $ 81,400 | $ 78,558 |
| Less: Significant and other segment expenses | |||
| Advertising expense | 3,700 | 3,100 | 2,500 |
| Bad debt expense | 1,370 | 1,192 | 898 |
| Impairment expense | 278 | 0 | 0 |
| Gain on disposal group held for sale | 0 | 0 | (25) |
| Interest expense, net | 3,774 | 3,411 | 3,335 |
| Other expense (income), net | 224 | (113) | (68) |
| Income tax expense | 3,289 | 3,373 | 2,682 |
| Net income | 10,992 | 11,339 | 8,317 |
| Equipment revenues | |||
| Segment Reporting Information [Line Items] | |||
| Total revenues | 15,972 | 14,263 | 14,138 |
| Less: Significant and other segment expenses | |||
| Cost of equipment sales | 21,277 | 18,882 | 18,533 |
| Wireless | |||
| Segment Reporting Information [Line Items] | |||
| Total revenues | 88,309 | 81,400 | 78,558 |
| Less: Significant and other segment expenses | |||
| Employee expenses | 8,553 | 7,041 | 7,629 |
| Lease expense | 5,197 | 5,066 | 5,398 |
| Advertising expense | 3,668 | 3,067 | 2,515 |
| Bad debt expense | 1,370 | 1,192 | 898 |
| Other segment items | 16,179 | 15,223 | 16,526 |
| Impairment expense | 278 | 0 | 0 |
| Gain on disposal group held for sale | 0 | 0 | (25) |
| Depreciation and amortization | 13,508 | 12,919 | 12,818 |
| Interest expense, net | 3,774 | 3,411 | 3,335 |
| Other expense (income), net | 224 | (113) | (68) |
| Income tax expense | 3,289 | 3,373 | 2,682 |
| Net income | 10,992 | 11,339 | 8,317 |
| Wireless | Equipment revenues | |||
| Less: Significant and other segment expenses | |||
| Cost of equipment sales | $ 21,277 | $ 18,882 | $ 18,533 |
Employee Compensation and Benefit Plans - Narrative (Details) |
12 Months Ended |
|---|---|
|
Dec. 31, 2025
shares
| |
| Restricted Stock and Unit Awards | |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Award vesting period (in years) | 3 years |
| Performance Restricted Stock Units | Maximum | |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Award vesting period (in years) | 3 years |
| 2023 Incentive Award Plan | |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Number of shares authorized for issuance (in shares) | 33,000,000 |
| Number of shares available for future grants (in shares) | 25,000,000 |
Employee Compensation and Benefit Plans - Schedule of Stock-based Compensation Expense and Related Income Tax Benefits (Details) - USD ($) $ / shares in Units, $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Stock-based compensation expense | $ 829 | $ 649 | $ 667 |
| Restricted Stock Units and Performance Stock Units | |||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Stock-based compensation expense | 829 | 649 | 667 |
| Income tax benefit related to stock-based compensation | $ 146 | $ 129 | $ 130 |
| Weighted-average fair value per stock award granted | $ 254.93 | $ 162.99 | $ 143.09 |
| Unrecognized compensation expense | $ 932 | $ 645 | $ 637 |
| Weighted-average period to be recognized (years) | 1 year 10 months 24 days | 1 year 9 months 18 days | 1 year 9 months 18 days |
| Fair value of stock awards vested | $ 1,333 | $ 820 | $ 889 |
Employee Compensation and Benefit Plans - Schedule of Restricted Stock and Unit Awards and Performance Restricted Stock Units Activity (Details) - USD ($) $ / shares in Units, $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Aggregate Intrinsic Value | |||
| Taxes paid related to net share settlement of stock awards | $ 434 | $ 269 | $ 297 |
| Minimum | |||
| Aggregate Intrinsic Value | |||
| Share payout percentage | 0.00% | ||
| Maximum | |||
| Aggregate Intrinsic Value | |||
| Share payout percentage | 200.00% | ||
| Restricted Stock Unit | |||
| Number of Units or Awards | |||
| Nonvested, beginning (in shares) | 6,637,235 | ||
| Granted (in shares) | 4,164,914 | ||
| Assumed through acquisition (in shares) | 339,324 | ||
| Vested (in shares) | (4,535,878) | ||
| Forfeited (in shares) | (554,457) | ||
| Nonvested, ending (in shares) | 6,051,138 | 6,637,235 | |
| Weighted-Average Grant Date Fair Value | |||
| Nonvested, beginning (in USD per share) | $ 151.55 | ||
| Granted (in USD per share) | 259.31 | ||
| Assumed through acquisition (in USD per share) | 233.41 | ||
| Vested (in USD per share) | 166.10 | ||
| Forfeited (in USD per share) | 217.70 | ||
| Nonvested, ending (in USD per share) | $ 215.34 | $ 151.55 | |
| Weighted-Average Remaining Contractual Term (Years) | |||
| Nonvested, December 31, 2024 | 9 months 18 days | 9 months 18 days | |
| Nonvested, December 31, 2025 | 9 months 18 days | 9 months 18 days | |
| Aggregate Intrinsic Value | |||
| Nonvested, Aggregate Intrinsic Value, beginning | $ 1,226 | $ 1,465 | |
| Nonvested, Aggregate Intrinsic Value, ending | $ 1,226 | $ 1,465 | |
| Performance Restricted Stock Units | |||
| Number of Units or Awards | |||
| Nonvested, beginning (in shares) | 559,364 | ||
| Granted (in shares) | 400,650 | ||
| Performance award achievement adjustments (in shares) | 241,488 | ||
| Vested (in shares) | (614,347) | ||
| Forfeited (in shares) | (69,035) | ||
| Nonvested, ending (in shares) | 518,120 | 559,364 | |
| Weighted-Average Grant Date Fair Value | |||
| Nonvested, beginning (in USD per share) | $ 159.79 | ||
| Granted (in USD per share) | 269.28 | ||
| Performance award achievement adjustments (in USD per share) | 155.67 | ||
| Vested (in USD per share) | 164.83 | ||
| Forfeited (in USD per share) | 256.21 | ||
| Nonvested, ending (in USD per share) | $ 223.71 | $ 159.79 | |
| Weighted-Average Remaining Contractual Term (Years) | |||
| Nonvested, December 31, 2024 | 1 year 7 months 6 days | 10 months 24 days | |
| Nonvested, December 31, 2025 | 1 year 7 months 6 days | 10 months 24 days | |
| Aggregate Intrinsic Value | |||
| Nonvested, Aggregate Intrinsic Value, beginning | $ 105 | $ 123 | |
| Nonvested, Aggregate Intrinsic Value, ending | $ 105 | $ 123 | |
| Restricted Stock Units and Performance Stock Units | |||
| Weighted-Average Grant Date Fair Value | |||
| Granted (in USD per share) | $ 254.93 | $ 162.99 | $ 143.09 |
| Aggregate Intrinsic Value | |||
| Shares paid for tax withholding for share based compensation (in shares) | 1,677,377 | 1,552,111 | 2,027,800 |
Employee Compensation and Benefit Plans - Employee Stock Purchase Plan (Details) - shares |
1 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2023 |
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Employee Stock Ownership Plan (ESOP) Disclosures [Line Items] | ||||
| Contribution percentage (up to) | 15.00% | |||
| Stock purchase discount percentage | 15.00% | |||
| ESPP, offering period | 6 months | |||
| ESPP plan increasing shares reserve (in shares) | 14,000,000 | |||
| Number of securities remaining available for future sale and issuance under ESPP (in shares) | 10,622,260 | |||
| Common Stock | ||||
| Employee Stock Ownership Plan (ESOP) Disclosures [Line Items] | ||||
| Number of shares issued under ESPP (in shares) | 1,150,449 | 1,519,242 | 1,771,475 | |
Employee Compensation and Benefit Plans - Schedule of Pension Plan (Details) - USD ($) $ in Millions |
12 Months Ended | |||
|---|---|---|---|---|
Dec. 20, 2024 |
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Defined Benefit Plan, Plan Assets, Allocation [Line Items] | ||||
| Expected long-term rate of return on plan assets | 8.00% | 7.00% | ||
| Actual rate of return on plan assets during period | 16.00% | 6.00% | ||
| Expected long-term rate of return on investments | 8.00% | |||
| Interest on projected benefit obligations | $ 50 | $ 83 | $ 86 | |
| Gain on settlement and amortization of actuarial gain | (8) | (119) | (59) | |
| Expected return on pension plan assets | (52) | (99) | (97) | |
| Net pension benefit | $ (10) | $ (135) | (70) | |
| Percent at quoted price | 13.00% | 26.00% | ||
| Percent at similar assets | 76.00% | 62.00% | ||
| Percent supported at unobservable inputs | 11.00% | 12.00% | ||
| Postretirement benefit plan assets | $ 732 | $ 626 | ||
| Projected benefit obligations | 908 | 895 | ||
| Underfunded plan | $ 176 | $ 269 | ||
| Discount rate | 6.00% | 6.00% | ||
| Contributions to benefit plan | $ 66 | $ 52 | $ 32 | |
| Expected future contributions | 31 | |||
| Expected payment, year one | 54 | |||
| Expected payment, years two and three | 114 | |||
| Expected payment, years four and five | 122 | |||
| Expected payment, thereafter | $ 323 | |||
| Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Interest Cost, Statement of Income or Comprehensive Income [Extensible Enumeration] | Other (expense) income, net | Other (expense) income, net | Other (expense) income, net | |
| Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration] | Other (expense) income, net | Other (expense) income, net | Other (expense) income, net | |
| Sprint Retirement Pension Plan | ||||
| Defined Benefit Plan, Plan Assets, Allocation [Line Items] | ||||
| Settlement for a portion of retiree obligations | $ 572 | |||
| Gain on settlement of pension plan obligation | $ 80 | |||
| Defined Benefit Plan, Equity Securities, US | ||||
| Defined Benefit Plan, Plan Assets, Allocation [Line Items] | ||||
| Target allocation, percentage | 51.00% | |||
| Fixed Income Securities | ||||
| Defined Benefit Plan, Plan Assets, Allocation [Line Items] | ||||
| Target allocation, percentage | 30.00% | |||
| Defined Benefit Plan, Real Estate | ||||
| Defined Benefit Plan, Plan Assets, Allocation [Line Items] | ||||
| Target allocation, percentage | 19.00% | |||
Employee Compensation and Benefit Plans - Employee Retirement Savings Plan (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Share-Based Payment Arrangement [Abstract] | |||
| Employer retirement savings plan, matching contributions | $ 171 | $ 159 | $ 171 |
Income Taxes - Schedule of Income Tax Domestic and Foreign (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Income Tax Disclosure [Abstract] | |||
| U.S. income | $ 14,018 | $ 14,607 | $ 10,943 |
| Foreign income | 263 | 105 | 56 |
| Income before income taxes | $ 14,281 | $ 14,712 | $ 10,999 |
Income Taxes - Schedule of Components of Income Tax Expense (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Current tax expense | |||
| Federal | $ (54) | $ (57) | $ (42) |
| State | (295) | (179) | (28) |
| Foreign | (76) | (17) | (12) |
| Total current tax expense | (425) | (253) | (82) |
| Deferred tax expense | |||
| Federal | (2,608) | (2,743) | (2,150) |
| State | (216) | (348) | (417) |
| Foreign | (40) | (29) | (33) |
| Total deferred tax expense | (2,864) | (3,120) | (2,600) |
| Total income tax expense | $ (3,289) | $ (3,373) | $ (2,682) |
Income Taxes - Schedule of Effective Income Tax Reconciliation (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Effective Income Tax Rate Reconciliation [Line Items] | |||
| Pre-tax income | $ 14,281 | $ 14,712 | $ 10,999 |
| Income tax expense | $ 3,289 | $ 3,373 | $ 2,682 |
| Effective income tax rate | 23.00% | 22.90% | 24.40% |
| Income Tax Expense | |||
| US federal statutory income tax rate | $ 2,999 | $ 3,089 | $ 2,310 |
| Effective income tax rate | $ 3,289 | $ 3,373 | $ 2,682 |
| Effective Tax Rate | |||
| US federal statutory income tax rate | 21.00% | 21.00% | 21.00% |
| Effective income tax rate | 23.00% | 22.90% | 24.40% |
| Domestic federal | |||
| Income Tax Expense | |||
| Tax credits | $ (286) | $ (141) | $ (130) |
| Non-taxable or non-deductible items | (34) | 35 | (5) |
| Cross-border tax laws | 55 | 21 | 19 |
| Changes in valuation allowances | (1) | (14) | (12) |
| Other | $ 15 | $ (26) | $ (6) |
| Effective Tax Rate | |||
| Tax credits | (2.00%) | (1.00%) | (1.20%) |
| Non-taxable or non-deductible items | (0.20%) | 0.20% | 0.00% |
| Cross-border tax laws | 0.30% | 0.20% | 0.20% |
| Changes in valuation allowances | 0.00% | (0.10%) | (0.10%) |
| Other | 0.10% | (0.20%) | 0.00% |
| State and Local Jurisdiction | |||
| Income Tax Expense | |||
| Domestic state & local income tax, net of federal income tax effect | $ 421 | $ 451 | $ 422 |
| Effective Tax Rate | |||
| Domestic state & local income tax, net of federal income tax effect | 3.00% | 3.10% | 3.80% |
| Foreign Tax Authority | |||
| Income Tax Expense | |||
| Foreign tax effects | $ 67 | $ 26 | $ 26 |
| Changes in unrecognized tax benefits | $ 53 | $ (68) | $ 58 |
| Effective Tax Rate | |||
| Foreign tax effects | 0.50% | 0.20% | 0.20% |
| Changes in unrecognized tax benefits | 0.30% | (0.50%) | 0.50% |
Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|---|---|---|---|
| Deferred tax assets | |||
| Loss carryforwards | $ 2,537 | $ 3,844 | |
| Lease liabilities | 7,814 | 7,781 | |
| Reserves and accruals | 1,160 | 958 | |
| Other | 2,932 | 3,959 | |
| Deferred tax assets, gross | 14,443 | 16,542 | |
| Valuation allowance | (240) | (259) | $ (306) |
| Deferred tax assets, net | 14,203 | 16,283 | |
| Deferred tax liabilities | |||
| Spectrum licenses | 20,105 | 19,527 | |
| Property and equipment | 6,399 | 5,874 | |
| Lease right-of-use assets | 6,543 | 6,508 | |
| Other | 739 | 1,074 | |
| Total deferred tax liabilities | 33,786 | 32,983 | |
| Net deferred tax liabilities | $ 19,583 | $ 16,700 |
Income Taxes - Narrative (Details) - USD ($) $ in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|---|---|---|---|
| Valuation Allowance [Line Items] | |||
| Indirect tax effects excluded | $ 180 | ||
| Valuation allowance | 240 | $ 259 | $ 306 |
| Unrecognized tax benefits that would impact effective tax rate | 1,300 | $ 1,300 | $ 1,300 |
| Domestic federal | |||
| Valuation Allowance [Line Items] | |||
| Unrecognized tax benefits, net operating loss | 1,800 | ||
| Operating loss carryforwards | 167 | ||
| Domestic federal | Research Tax Credit Carryforward | |||
| Valuation Allowance [Line Items] | |||
| Federal and state tax credits | 648 | ||
| State | |||
| Valuation Allowance [Line Items] | |||
| Unrecognized tax benefits, net operating loss | 1,400 | ||
| Operating loss carryforwards | 682 | ||
| Foreign Tax Authority | |||
| Valuation Allowance [Line Items] | |||
| Unrecognized tax benefits, net operating loss | 8 | ||
| Operating loss carryforwards | 8 | ||
| Federal and State Tax Authorities | Research Tax Credit Carryforward | |||
| Valuation Allowance [Line Items] | |||
| Unrecognized tax benefits, net operating loss | $ 1,700 |
Income Taxes - Schedule of Unrecognized Tax Benefits (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] | |||
| Unrecognized tax benefits, beginning of year | $ 1,470 | $ 1,477 | $ 1,254 |
| Gross increases to tax positions in prior periods | 70 | 140 | 19 |
| Gross decreases to tax positions in prior periods | (147) | (201) | (39) |
| Gross increases to current period tax positions | 166 | 132 | 256 |
| Gross decreases due to settlements with taxing authorities | (62) | (11) | 0 |
| Gross decreases due to statute of limitations lapse | (18) | (67) | (13) |
| Unrecognized tax benefits, end of year | $ 1,479 | $ 1,470 | $ 1,477 |
Income Taxes - Income Taxes Paid, Net of Refunds (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Income Tax Paid, by Individual Jurisdiction [Line Items] | |||
| Federal | $ 97 | $ 113 | $ 10 |
| State & local | |||
| Total state & local | 331 | 57 | 60 |
| Foreign | |||
| Total foreign | 23 | 9 | 38 |
| Total income taxes paid, net | 451 | 179 | 108 |
| Texas | |||
| State & local | |||
| Total state & local | 34 | 27 | 26 |
| Illinois | |||
| State & local | |||
| Total state & local | 42 | 18 | |
| California | |||
| State & local | |||
| Total state & local | 190 | (10) | (10) |
| Other | |||
| State & local | |||
| Total state & local | 65 | 40 | 26 |
| Puerto Rico | |||
| Foreign | |||
| Total foreign | 35 | ||
| Other | |||
| Foreign | |||
| Total foreign | $ 23 | $ 9 | $ 3 |
Stockholder Return Programs (Details) - USD ($) $ / shares in Units, $ in Millions |
1 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 11, 2025 |
Sep. 11, 2025 |
Jun. 12, 2025 |
Mar. 13, 2025 |
Feb. 06, 2026 |
Dec. 31, 2025 |
Sep. 30, 2025 |
Jun. 30, 2025 |
Mar. 31, 2025 |
Dec. 31, 2024 |
Sep. 30, 2023 |
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
Dec. 13, 2024 |
Sep. 06, 2023 |
Sep. 08, 2022 |
|
| Equity, Class of Treasury Stock [Line Items] | |||||||||||||||||
| Purchase price | $ 9,957 | $ 11,206 | $ 13,255 | ||||||||||||||
| Dividends on common stock | $ 4,121 | $ 3,300 | $ 747 | ||||||||||||||
| Common stock, dividends declared (in USD per share) | $ 3.80 | $ 3.71 | $ 0.65 | ||||||||||||||
| 2022 Stock Repurchase Program | |||||||||||||||||
| Equity, Class of Treasury Stock [Line Items] | |||||||||||||||||
| Stock repurchase program, authorized amount | $ 14,000 | ||||||||||||||||
| Repurchases of common stock (in shares) | 77,460,937 | ||||||||||||||||
| Average price paid per share (in USD per share) | $ 141.57 | ||||||||||||||||
| Purchase price | $ 11,000 | ||||||||||||||||
| 2023-2024 Stockholder Return Program | |||||||||||||||||
| Equity, Class of Treasury Stock [Line Items] | |||||||||||||||||
| Stock repurchase program, authorized amount | $ 19,000 | ||||||||||||||||
| Repurchases of common stock (in shares) | 59,376,922 | 15,464,107 | |||||||||||||||
| Average price paid per share (in USD per share) | $ 144.95 | $ 187.07 | |||||||||||||||
| Purchase price | $ 11,100 | $ 2,200 | |||||||||||||||
| Dividends on common stock | $ 4,100 | 3,300 | 747 | ||||||||||||||
| 2023-2024 Stockholder Return Program | DT | |||||||||||||||||
| Equity, Class of Treasury Stock [Line Items] | |||||||||||||||||
| Dividends on common stock | $ 1,700 | $ 393 | |||||||||||||||
| 2025 Stockholder Return Program | |||||||||||||||||
| Equity, Class of Treasury Stock [Line Items] | |||||||||||||||||
| Stock repurchase program, authorized amount | $ 14,000 | ||||||||||||||||
| Repurchases of common stock (in shares) | 42,363,226 | ||||||||||||||||
| Average price paid per share (in USD per share) | $ 232.96 | ||||||||||||||||
| Purchase price | $ 9,900 | ||||||||||||||||
| Dividends on common stock | 4,100 | ||||||||||||||||
| Common stock, dividends paid (in USD per share) | $ 1.02 | ||||||||||||||||
| Stock repurchase authorization amount | $ 14,600 | 14,600 | |||||||||||||||
| 2025 Stockholder Return Program | DT | |||||||||||||||||
| Equity, Class of Treasury Stock [Line Items] | |||||||||||||||||
| Dividends on common stock | 2,100 | ||||||||||||||||
| 2025 Stockholder Return Program | 2024 Q4 Dividends Declared | |||||||||||||||||
| Equity, Class of Treasury Stock [Line Items] | |||||||||||||||||
| Common stock, dividends declared (in USD per share) | $ 0.88 | ||||||||||||||||
| Common stock, dividends paid (in USD per share) | $ 0.88 | ||||||||||||||||
| 2025 Stockholder Return Program | 2025 Q1 Dividends Declared | |||||||||||||||||
| Equity, Class of Treasury Stock [Line Items] | |||||||||||||||||
| Common stock, dividends declared (in USD per share) | $ 0.88 | ||||||||||||||||
| Common stock, dividends paid (in USD per share) | $ 0.88 | ||||||||||||||||
| 2025 Stockholder Return Program | 2025 Q2 Dividends Declared | |||||||||||||||||
| Equity, Class of Treasury Stock [Line Items] | |||||||||||||||||
| Common stock, dividends declared (in USD per share) | $ 0.88 | ||||||||||||||||
| Common stock, dividends paid (in USD per share) | $ 0.88 | ||||||||||||||||
| 2025 Stockholder Return Program | 2025 Q3 Dividends Declared | |||||||||||||||||
| Equity, Class of Treasury Stock [Line Items] | |||||||||||||||||
| Common stock, dividends declared (in USD per share) | $ 1.02 | ||||||||||||||||
| Common stock, dividends paid (in USD per share) | $ 1.02 | ||||||||||||||||
| 2025 Stockholder Return Program | 2025 Q4 Dividends Declared | |||||||||||||||||
| Equity, Class of Treasury Stock [Line Items] | |||||||||||||||||
| Common stock, dividends declared (in USD per share) | $ 1.02 | ||||||||||||||||
| 2026 Stockholder Return Program | |||||||||||||||||
| Equity, Class of Treasury Stock [Line Items] | |||||||||||||||||
| Stock repurchase program, authorized amount | $ 14,600 | ||||||||||||||||
| Dividends payable | $ 1,100 | 1,100 | |||||||||||||||
| 2026 Stockholder Return Program | Subsequent Event | |||||||||||||||||
| Equity, Class of Treasury Stock [Line Items] | |||||||||||||||||
| Repurchases of common stock (in shares) | 5,106,691 | ||||||||||||||||
| Average price paid per share (in USD per share) | $ 192.61 | ||||||||||||||||
| Purchase price | $ 984 | ||||||||||||||||
| Stock repurchase authorization amount | $ 13,600 | ||||||||||||||||
| 2026 Stockholder Return Program | DT | |||||||||||||||||
| Equity, Class of Treasury Stock [Line Items] | |||||||||||||||||
| Dividends payable | $ 594 | $ 594 | |||||||||||||||
Earnings Per Share - Schedule of Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Earnings Per Share [Abstract] | |||
| Net income | $ 10,992 | $ 11,339 | $ 8,317 |
| Weighted-average shares outstanding - basic (in shares) | 1,127,984,348 | 1,169,195,373 | 1,185,121,562 |
| Effect of dilutive securities: | |||
| Outstanding stock options, unvested stock awards and SoftBank contingent consideration (in shares) | 3,091,903 | 4,018,525 | 15,164,702 |
| Weighted-average shares outstanding - diluted (in shares) | 1,131,076,251 | 1,173,213,898 | 1,200,286,264 |
| Earnings per share - basic (in USD per share) | $ 9.75 | $ 9.70 | $ 7.02 |
| Earnings per share - diluted (in USD per share) | $ 9.72 | $ 9.66 | $ 6.93 |
| Outstanding stock options and unvested stock awards | |||
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | |||
| Potentially dilutive securities (in shares) | 77,805 | 25,652 | 148,537 |
| Ka’ena Acquisition earnout | |||
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | |||
| Potentially dilutive securities (in shares) | 0 | 750,162 | 0 |
Earnings Per Share - Narrative (Details) $ / shares in Units, $ in Millions |
12 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|
|
Jun. 30, 2025
USD ($)
|
Dec. 22, 2023
USD ($)
customer
$ / shares
|
Mar. 09, 2023
USD ($)
|
Feb. 20, 2020
shares
|
Dec. 31, 2025
customer
$ / shares
shares
|
Dec. 31, 2023
USD ($)
|
Dec. 31, 2024
shares
|
|||
| Class of Stock [Line Items] | |||||||||
| Number of trailing trading-day | customer | 45 | ||||||||
| Stockholders' equity, value, contingent shares settlement | $ | [1] | $ 52 | |||||||
| Contingent Consideration For Merger | |||||||||
| Class of Stock [Line Items] | |||||||||
| Potentially dilutive securities (in shares) | shares | 48,751,557 | ||||||||
| Number of trailing trading-day | customer | 45 | ||||||||
| Threshold price, weighted average price per share (in USD per share) | $ / shares | $ 150.00 | ||||||||
| Number of shares issued if threshold not met (in USD per share) | $ / shares | $ 149.35 | ||||||||
| Stockholders' equity, value, contingent shares settlement | $ | $ 6,900 | ||||||||
| Ka Ena Corporation | Merger And Unit Purchase Agreement | |||||||||
| Class of Stock [Line Items] | |||||||||
| Total consideration transferred | $ | $ 1,350 | $ 1,350 | |||||||
| Mandatory Convertible Preferred Stock Series A | |||||||||
| Class of Stock [Line Items] | |||||||||
| Preferred shares authorized (in shares) | shares | 100,000,000 | ||||||||
| Preferred stock, par value (in USD per share) | $ / shares | $ 0.00001 | ||||||||
| Preferred shares outstanding (in shares) | shares | 0 | 0 | |||||||
| |||||||||
Leases - Narrative (Details) $ in Millions |
12 Months Ended | |||
|---|---|---|---|---|
|
Aug. 01, 2025
USD ($)
tower_site
|
Dec. 31, 2025
USD ($)
|
Dec. 31, 2024
USD ($)
|
Dec. 31, 2023
USD ($)
|
|
| Lessee, Lease, Description [Line Items] | ||||
| Interest payments for financing leases | $ 126 | $ 111 | $ 79 | |
| Leases not yet commenced | $ 38 | |||
| UScellular Wireless Assets Operations | ||||
| Lessee, Lease, Description [Line Items] | ||||
| Lessee leasing arrangements, operating leases, term of contract (years) | 30 months | |||
| UScellular Wireless Assets Operations | Master License Agreement | ||||
| Lessee, Lease, Description [Line Items] | ||||
| Number of towers retained | tower_site | 2,100 | |||
| Number of towers leased on interim basis | tower_site | 1,800 | |||
| Operating lease right-of-use assets | $ 1,000 | |||
| Operating lease liabilities | 1,000 | |||
| Deferred tax liabilities | 261 | |||
| Deferred tax assets | $ 261 | |||
| UScellular Wireless Assets Operations | Purchase Agreement | ||||
| Lessee, Lease, Description [Line Items] | ||||
| Lessee leasing arrangements, operating leases, term of contract (years) | 15 years | |||
| Number of towers to be extended tenancy term | tower_site | 600 | |||
| Minimum | ||||
| Lessee, Lease, Description [Line Items] | ||||
| Lessee leasing arrangements, operating leases, term of contract (years) | 5 years | |||
| Lessee, operating lease, renewal term (years) | 5 years | |||
| Lessee leasing arrangements, finance leases, term of contract | 3 years | |||
| Maximum | ||||
| Lessee, Lease, Description [Line Items] | ||||
| Lessee leasing arrangements, operating leases, term of contract (years) | 15 years | |||
| Lessee, operating lease, renewal term (years) | 50 years | |||
| Lessee leasing arrangements, finance leases, term of contract | 5 years | |||
Leases - Schedule of Components of Lease Expense (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Leases [Abstract] | |||
| Operating lease expense | $ 4,945 | $ 4,787 | $ 4,987 |
| Financing lease expense: | |||
| Amortization of right-of-use assets | 794 | 787 | 684 |
| Interest on lease liabilities | 126 | 111 | 79 |
| Total financing lease expense | 920 | 898 | 763 |
| Variable lease expense | 252 | 279 | 411 |
| Total lease expense | $ 6,117 | $ 5,964 | $ 6,161 |
Leases - Schedule of Information Related to Lease Term and Discount Rate (Details) |
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|---|---|---|---|
| Weighted-Average Remaining Lease Term (Years) | |||
| Operating leases | 8 years | 8 years | 9 years |
| Financing leases | 2 years | 2 years | 2 years |
| Weighted-Average Discount Rate | |||
| Operating leases | 4.60% | 4.40% | 4.30% |
| Financing leases | 5.00% | 5.30% | 4.60% |
Leases - Schedule of Maturity of Operating and Finance Lease Liabilities (Details) $ in Millions |
Dec. 31, 2025
USD ($)
|
|---|---|
| Operating Leases | |
| 2026 | $ 5,060 |
| 2027 | 4,782 |
| 2028 | 4,425 |
| 2029 | 4,111 |
| 2030 | 3,730 |
| Thereafter | 13,987 |
| Total lease payments | 36,095 |
| Less: imputed interest | (5,910) |
| Total | 30,185 |
| Finance Leases | |
| 2026 | 1,222 |
| 2027 | 772 |
| 2028 | 347 |
| 2029 | 17 |
| 2030 | 4 |
| Thereafter | 7 |
| Total lease payments | 2,369 |
| Less: imputed interest | (99) |
| Total | $ 2,270 |
Commitment and Contingencies - Schedule of Timing of Purchase Obligations (Details) $ in Millions |
Dec. 31, 2025
USD ($)
|
|---|---|
| Commitments and Contingencies Disclosure [Abstract] | |
| Less Than 1 Year | $ 5,047 |
| 1 - 3 Years | 6,181 |
| 3 - 5 Years | 2,990 |
| More Than 5 Years | 2,836 |
| Total | $ 17,054 |
Commitments and Contingencies - Narrative (Details) $ in Millions |
3 Months Ended | 12 Months Ended | 24 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
Jan. 13, 2025
USD ($)
|
Sep. 12, 2023
USD ($)
|
Jan. 05, 2023
customer_account
|
Jun. 30, 2025
USD ($)
|
Jun. 30, 2022
USD ($)
|
Dec. 31, 2025
USD ($)
|
Dec. 31, 2024
USD ($)
|
Dec. 31, 2023
USD ($)
|
Dec. 31, 2022
USD ($)
|
Dec. 31, 2028
USD ($)
|
Dec. 31, 2023
USD ($)
|
|
| Loss Contingencies [Line Items] | |||||||||||
| Legal settlement paid | $ 350 | ||||||||||
| Aggregate incremental expense | $ 150 | $ 150 | |||||||||
| Number of customer accounts impacted | customer_account | 37,000,000 | ||||||||||
| Minimum | Licensing Agreements | Comcast Corporation | |||||||||||
| Loss Contingencies [Line Items] | |||||||||||
| Total cash consideration | $ 1,200 | $ 1,200 | |||||||||
| Maximum | Licensing Agreements | Comcast Corporation | |||||||||||
| Loss Contingencies [Line Items] | |||||||||||
| Total cash consideration | $ 3,400 | $ 3,300 | |||||||||
| Selling, General and Administrative Expenses | |||||||||||
| Loss Contingencies [Line Items] | |||||||||||
| Aggregate incremental expense | $ 400 | ||||||||||
| Reimbursements from insurance carriers for costs | $ 105 | $ 50 | |||||||||
| Lumos | |||||||||||
| Loss Contingencies [Line Items] | |||||||||||
| Expected investment to acquire interest in joint venture | $ 932 | ||||||||||
| Lumos | Forecast | |||||||||||
| Loss Contingencies [Line Items] | |||||||||||
| Expected investment to acquire interest in joint venture | $ 500 | ||||||||||
Commitment and Contingencies - Schedule of Timing of Spectrum Lease and Service Credit Commitments (Details) $ in Millions |
Dec. 31, 2025
USD ($)
|
|---|---|
| Commitments and Contingencies Disclosure [Abstract] | |
| Less Than 1 Year | $ 297 |
| 1 - 3 Years | 629 |
| 3 - 5 Years | 645 |
| More Than 5 Years | 3,448 |
| Total | $ 5,019 |
Restructuring Costs - Schedule of Restructuring Plan Expenses Incurred (Details) - USD ($) $ in Millions |
5 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Restructuring Cost and Reserve [Line Items] | ||||
| Restructuring Incurred Cost Statement Of Income Or Comprehensive Income Extensible Enumeration Not Disclosed Flag | Total restructuring plan expenses | |||
| UScellular Acquisition Restructuring Initiatives | ||||
| Restructuring Cost and Reserve [Line Items] | ||||
| Total restructuring plan expenses | $ 111 | $ 111 | ||
| Network Optimization Restructuring Initiatives | ||||
| Restructuring Cost and Reserve [Line Items] | ||||
| Total restructuring plan expenses | 69 | |||
| Sprint Merger Restructuring Initiatives | ||||
| Restructuring Cost and Reserve [Line Items] | ||||
| Total restructuring plan expenses | $ 95 | $ 337 | ||
| Incurred to Date | 2,903 | 2,903 | ||
| Contract termination costs | UScellular Acquisition Restructuring Initiatives | ||||
| Restructuring Cost and Reserve [Line Items] | ||||
| Total restructuring plan expenses | 32 | 32 | ||
| Contract termination costs | Network Optimization Restructuring Initiatives | ||||
| Restructuring Cost and Reserve [Line Items] | ||||
| Total restructuring plan expenses | 5 | |||
| Contract termination costs | Sprint Merger Restructuring Initiatives | ||||
| Restructuring Cost and Reserve [Line Items] | ||||
| Total restructuring plan expenses | 4 | 45 | ||
| Incurred to Date | 472 | 472 | ||
| Severance costs | UScellular Acquisition Restructuring Initiatives | ||||
| Restructuring Cost and Reserve [Line Items] | ||||
| Total restructuring plan expenses | 63 | 63 | ||
| Severance costs | Sprint Merger Restructuring Initiatives | ||||
| Restructuring Cost and Reserve [Line Items] | ||||
| Total restructuring plan expenses | 0 | 3 | ||
| Incurred to Date | 574 | 574 | ||
| Severance costs | 2023 Workforce Reduction | ||||
| Restructuring Cost and Reserve [Line Items] | ||||
| Restructuring expenses | (3) | (5) | 462 | |
| Incurred to Date | 454 | 454 | ||
| Network decommissioning | UScellular Acquisition Restructuring Initiatives | ||||
| Restructuring Cost and Reserve [Line Items] | ||||
| Total restructuring plan expenses | 16 | 16 | ||
| Network decommissioning | Network Optimization Restructuring Initiatives | ||||
| Restructuring Cost and Reserve [Line Items] | ||||
| Total restructuring plan expenses | 64 | |||
| Network decommissioning | Sprint Merger Restructuring Initiatives | ||||
| Restructuring Cost and Reserve [Line Items] | ||||
| Total restructuring plan expenses | $ 91 | $ 289 | ||
| Incurred to Date | $ 1,857 | $ 1,857 | ||
Restructuring Costs - Narrative (Details) $ in Millions |
1 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
|
Aug. 31, 2023
position
|
Dec. 31, 2025
USD ($)
|
Dec. 31, 2024
USD ($)
|
Dec. 31, 2023
USD ($)
|
|
| Restructuring Cost and Reserve [Line Items] | ||||
| Restructuring expected period | 2 years | |||
| Amortization of the right-of-use assets on lease contracts | $ 24 | $ 91 | $ 390 | |
| Restructuring and related cost, accelerated depreciation | 97 | |||
| 2025 Workforce Transformation | ||||
| Restructuring Cost and Reserve [Line Items] | ||||
| Total restructuring plan expenses | $ 390 | |||
| 2023 Workforce Reduction | ||||
| Restructuring Cost and Reserve [Line Items] | ||||
| Number of positions | position | 5,000 | |||
| Restructuring and related cost, workforce reduction size of percentage | 7.00% | |||
Restructuring Costs - Schedule of Activity Related to Reduction Initiative Expenses Incurred (Details) - USD ($) $ in Millions |
5 Months Ended | 12 Months Ended |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2025 |
|
| UScellular Acquisition Restructuring Initiatives | ||
| Restructuring Cost and Reserve [Line Items] | ||
| Restructuring reserve, beginning balance | $ 0 | |
| Expenses Incurred | 111 | $ 111 |
| Cash Payments | (12) | |
| Adjustments for Non-Cash Items | (8) | |
| Restructuring reserve, ending balance | 91 | 91 |
| Network Optimization Restructuring Initiatives | ||
| Restructuring Cost and Reserve [Line Items] | ||
| Restructuring reserve, beginning balance | 0 | |
| Expenses Incurred | 69 | |
| Cash Payments | (10) | |
| Adjustments for Non-Cash Items | (58) | |
| Restructuring reserve, ending balance | 1 | 1 |
| Contract termination costs | UScellular Acquisition Restructuring Initiatives | ||
| Restructuring Cost and Reserve [Line Items] | ||
| Restructuring reserve, beginning balance | 0 | |
| Expenses Incurred | 32 | 32 |
| Cash Payments | (1) | |
| Adjustments for Non-Cash Items | 0 | |
| Restructuring reserve, ending balance | 31 | 31 |
| Contract termination costs | Network Optimization Restructuring Initiatives | ||
| Restructuring Cost and Reserve [Line Items] | ||
| Restructuring reserve, beginning balance | 0 | |
| Expenses Incurred | 5 | |
| Cash Payments | (5) | |
| Adjustments for Non-Cash Items | 0 | |
| Restructuring reserve, ending balance | 0 | 0 |
| Severance costs | UScellular Acquisition Restructuring Initiatives | ||
| Restructuring Cost and Reserve [Line Items] | ||
| Restructuring reserve, beginning balance | 0 | |
| Expenses Incurred | 63 | 63 |
| Cash Payments | (4) | |
| Adjustments for Non-Cash Items | 0 | |
| Restructuring reserve, ending balance | 59 | 59 |
| Network decommissioning | UScellular Acquisition Restructuring Initiatives | ||
| Restructuring Cost and Reserve [Line Items] | ||
| Restructuring reserve, beginning balance | 0 | |
| Expenses Incurred | 16 | 16 |
| Cash Payments | (7) | |
| Adjustments for Non-Cash Items | (8) | |
| Restructuring reserve, ending balance | 1 | 1 |
| Network decommissioning | Network Optimization Restructuring Initiatives | ||
| Restructuring Cost and Reserve [Line Items] | ||
| Restructuring reserve, beginning balance | 0 | |
| Expenses Incurred | 64 | |
| Cash Payments | (5) | |
| Adjustments for Non-Cash Items | (58) | |
| Restructuring reserve, ending balance | $ 1 | $ 1 |
Restructuring Costs - Schedule of Workforce Reduction Incurred and Cash Payments Made (Details) - 2025 Workforce Transformation $ in Millions |
12 Months Ended |
|---|---|
|
Dec. 31, 2025
USD ($)
| |
| Restructuring Reserve [Roll Forward] | |
| Restructuring reserve, beginning balance | $ 0 |
| Expenses Incurred | 390 |
| Cash Payments | (16) |
| Restructuring reserve, ending balance | $ 374 |
Additional Financial Information - Schedule of Accounts Payable and Accrued Liabilities (Details) - USD ($) $ in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Accounts Payable and Accrued Liabilities [Line Items] | ||
| Accounts payable | $ 5,219 | $ 4,242 |
| Payroll and related benefits | 1,709 | 1,072 |
| Property and other taxes, including payroll | 1,601 | 1,524 |
| Accrued interest | 1,025 | 905 |
| Other accrued liabilities | 726 | 720 |
| Accounts payable and accrued liabilities | 10,280 | 8,463 |
| Accounts Payable and Accrued Liabilities | ||
| Accounts Payable and Accrued Liabilities [Line Items] | ||
| Outstanding checks | $ 823 | $ 460 |
Additional Financial Information - Schedule of Related Party Transactions (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Accounts Payable and Accrued Liabilities [Line Items] | |||
| Dividends on common stock | $ 4,121 | $ 3,300 | $ 747 |
| 2023-2024 Stockholder Return Program | |||
| Accounts Payable and Accrued Liabilities [Line Items] | |||
| Dividends on common stock | 4,100 | 3,300 | 747 |
| 2023-2024 Stockholder Return Program | DT | |||
| Accounts Payable and Accrued Liabilities [Line Items] | |||
| Dividends on common stock | 1,700 | 393 | |
| 2025 Stockholder Return Program | |||
| Accounts Payable and Accrued Liabilities [Line Items] | |||
| Dividends on common stock | 4,100 | ||
| 2025 Stockholder Return Program | DT | |||
| Accounts Payable and Accrued Liabilities [Line Items] | |||
| Dividends on common stock | 2,100 | ||
| Affiliates | |||
| Accounts Payable and Accrued Liabilities [Line Items] | |||
| Fees incurred for use of the T-Mobile brand | 80 | 80 | 80 |
| International long distance agreement | 14 | 19 | 20 |
| Reimbursement of certain administrative expenses | $ 5 | $ 4 | $ 4 |
Additional Financial Information - Schedule of Supplemental Consolidated Statements of Cash Flows Information (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Supplemental Financial Statement Elements [Abstract] | |||
| Interest payments, net of amounts capitalized | $ 3,882 | $ 3,683 | $ 3,546 |
| Operating lease payments | 4,764 | 5,162 | 5,062 |
| Income tax payments, net of refunds received | 451 | 179 | 108 |
| Non-cash investing and financing activities | |||
| Non-cash beneficial interest obtained in exchange for securitized receivables | 0 | 2,421 | 3,990 |
| Change in accounts payable and accrued liabilities for purchases of property and equipment | (227) | 105 | (860) |
| Operating lease right-of-use assets obtained in exchange for lease obligations | 2,728 | 1,741 | 2,141 |
| Financing lease right-of-use assets obtained in exchange for lease obligations | 1,232 | 1,222 | 1,224 |
| Deferred consideration related to the Ka’ena Acquisition | 0 | 218 | 0 |
| Debt assumed in the UScellular Acquisition | $ 1,653 | $ 0 | $ 0 |
Additional Financial Information - Schedule of Cash and Cash Equivalents, Including Restricted Cash (Details) - USD ($) $ in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Supplemental Financial Statement Elements [Abstract] | ||
| Cash and cash equivalents | $ 5,598 | $ 5,409 |
| Restricted cash (included in Other current assets) | 296 | 231 |
| Restricted cash (included in Other assets) | 82 | 73 |
| Cash and cash equivalents, including restricted cash | $ 5,976 | $ 5,713 |
Subsequent Events (Details) - USD ($) |
1 Months Ended | 12 Months Ended | |||||
|---|---|---|---|---|---|---|---|
Feb. 06, 2026 |
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
Feb. 05, 2026 |
Jan. 22, 2026 |
Jan. 12, 2026 |
|
| Subsequent Event [Line Items] | |||||||
| Principal outstanding | $ 13,827,000,000 | ||||||
| Debt instrument, repurchased face amount | 1,199,000,000 | ||||||
| Purchase price | 9,957,000,000 | $ 11,206,000,000 | $ 13,255,000,000 | ||||
| Senior Notes | |||||||
| Subsequent Event [Line Items] | |||||||
| Principal outstanding | $ 10,827,000,000 | ||||||
| Subsequent Event | 2026 Stockholder Return Program | |||||||
| Subsequent Event [Line Items] | |||||||
| Repurchases of common stock (in shares) | 5,106,691 | ||||||
| Average price paid per share (in USD per share) | $ 192.61 | ||||||
| Purchase price | $ 984,000,000 | ||||||
| 5.000% Senior Notes due 2036 | Subsequent Event | |||||||
| Subsequent Event [Line Items] | |||||||
| Principal outstanding | $ 1,200,000,000 | ||||||
| Interest rate, stated percentage | 5.00% | ||||||
| 5.850% Senior Notes due 2056 | Subsequent Event | |||||||
| Subsequent Event [Line Items] | |||||||
| Principal outstanding | $ 850,000,000 | ||||||
| Interest rate, stated percentage | 5.85% | ||||||
| 4.750% Senior Notes due 2028 | Senior Notes | |||||||
| Subsequent Event [Line Items] | |||||||
| Interest rate, stated percentage | 4.75% | ||||||
| 4.750% Senior Notes due 2028 | Subsequent Event | Senior Notes | |||||||
| Subsequent Event [Line Items] | |||||||
| Interest rate, stated percentage | 4.75% | ||||||
| Debt instrument, repurchased face amount | $ 3,000,000,000 | ||||||
| Notes Payable, Other Payables | Subsequent Event | |||||||
| Subsequent Event [Line Items] | |||||||
| Principal outstanding | $ 1,000,000,000 | ||||||