Audit Information |
12 Months Ended |
|---|---|
Oct. 31, 2025 | |
| Audit Information [Abstract] | |
| Auditor Name | PricewaterhouseCoopers LLP |
| Auditor Firm ID | 238 |
| Auditor Location | San Jose, California |
CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Oct. 31, 2025 |
Oct. 31, 2024 |
Oct. 31, 2023 |
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| Statement of Comprehensive Income [Abstract] | |||
| Net income | $ 850 | $ 614 | $ 1,057 |
| Other comprehensive income (loss): | |||
| Gains (losses) on derivative instruments, net of tax benefit (expense) of $(1), $(2) and $4 | 5 | 7 | (15) |
| Amounts reclassified into earnings related to derivative instruments, net of tax benefit (expense) of $3, $4 and $1 | (12) | (7) | (6) |
| Foreign currency translation, net of tax benefit (expense) of zero | 70 | 31 | 18 |
| Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax [Abstract] | |||
| Change in net actuarial loss, net of tax benefit (expense) of $(7), $(14) and $10 | 53 | 73 | (9) |
| Change in net prior service cost, net of tax benefit of zero, zero and zero | 0 | (2) | 0 |
| Other comprehensive income (loss) | 116 | 102 | (12) |
| Comprehensive Income (Loss), Net of Tax, Attributable to Parent | $ 966 | $ 716 | $ 1,045 |
CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Oct. 31, 2025 |
Oct. 31, 2024 |
Oct. 31, 2023 |
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| Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent, Parenthetical Disclosure [Abstract] | |||
| Unrealized gain (loss) on derivative instruments, Tax | $ (1) | $ (2) | $ 4 |
| Amounts reclassified into earnings related to derivative instruments, Tax | 3 | 4 | 1 |
| Foreign currency translation, Tax | 0 | 0 | 0 |
| Change in actuarial net gain (loss), Tax | (7) | (14) | 10 |
| Change in net prior service credit, Tax | $ 0 | $ 0 | $ 0 |
CONSOLIDATED BALANCE SHEET (Parenthetical) - $ / shares shares in Millions |
Oct. 31, 2025 |
Oct. 31, 2024 |
|---|---|---|
| Stockholders' equity: | ||
| Preferred stock, par value (in dollars per share) | $ 0.01 | $ 0.01 |
| Preferred stock, shares authorized (in shares) | 100.0 | 100.0 |
| Preferred stock, shares issued (in shares) | 0.0 | 0.0 |
| Preferred stock, shares outstanding (in shares) | 0.0 | 0.0 |
| Common stock, par value (in dollars per share) | $ 0.01 | $ 0.01 |
| Common stock, shares authorized (in shares) | 1,000.0 | 1,000.0 |
| Common stock, shares issued (in shares) | 202.0 | 201.0 |
| Treasury Stock, Common, Shares | 30.8 | 28.4 |
OVERVIEW AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |
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| OVERVIEW AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES | 1. OVERVIEW, BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Overview. Keysight Technologies, Inc. (“we,” “us,” “Keysight” or the “company”), incorporated in Delaware on December 6, 2013, is a global innovator in the computing, communications and electronics markets, committed to advancing our customers’ business success by helping them solve critical challenges in the development and commercialization of their products and services. Our mission, “accelerating innovation to connect and secure the world,” speaks to the value we provide our customers in a world of ever-increasing technological complexity. We deliver this value through a broad range of design and test solutions that address the critical challenges our customers face in bringing their innovations to market on ever-shorter schedules. Basis of Presentation. We have prepared the accompanying financial statements pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”) and in conformity with generally accepted accounting principles in the U.S. (“GAAP”). Our fiscal year end is October 31. Unless otherwise stated, all years and dates refer to our fiscal year. Management is responsible for the fair presentation of the accompanying consolidated financial statements, prepared in accordance with GAAP, and has full responsibility for their integrity and accuracy. In the opinion of management, the accompanying consolidated financial statements contain all normal and recurring adjustments necessary to present fairly our consolidated balance sheet, consolidated statement of operations, consolidated statement of comprehensive income, consolidated statement of cash flows, and consolidated statement of equity. Principles of consolidation. The consolidated financial statements include the accounts of the company and our wholly- and majority-owned subsidiaries. All significant inter-company transactions have been eliminated. There was no non-controlling interest for the years ended October 31, 2025 and 2023. The consolidated financial statements for the year ended October 31, 2024 reflect the impact of non-controlling interests. Non-controlling interests did not have a significant impact on the consolidated results of operations; therefore, net income attributable to non-controlling interests for the year ended October 31, 2024 of $4 million is not presented separately and is included in “other income (expense), net” in the consolidated statements of operations. Use of Estimates. The preparation of financial statements in accordance with GAAP requires management to make estimates and assumptions that affect the amounts reported in our consolidated financial statements and accompanying notes. Management bases its estimates on historical experience and various other assumptions believed to be reasonable. Although these estimates are based on management's knowledge of current events and actions that may impact the company in the future, actual results may be different from the estimates. We are not aware of any specific event or circumstance that would require an update to our estimates or judgments or a revision of the carrying value of our assets or liabilities as of October 31, 2025. Our critical accounting policies are those that affect our financial statements materially and involve difficult, subjective or complex judgments by management. Those policies are revenue recognition, inventory valuation, share-based compensation, retirement and post-retirement plan assumptions, business combinations, valuation of goodwill and other intangible assets, warranty, loss contingencies, restructuring, and accounting for income taxes. Revenue recognition. Revenue is recognized upon transfer of control of the promised products or services to customers in an amount that reflects the consideration we expect to receive in exchange for those products or services. We primarily generate revenue from the sale of products (hardware and/or software), services, or a combination thereof. We enter into contracts that may involve multiple performance obligations, and we allocate the transaction price between each performance obligation on the basis of relative standalone selling price (“SSP”). Revenue is recognized net of allowances for returns and any taxes collected from customers, which are subsequently remitted to governmental authorities. Product revenues are generated predominantly from the sale of various types of design and test software and hardware. Products consist of standalone software and hardware generally installed with software applications that are licensed on a perpetual and term basis. Our hardware products generally do not have any substantive acceptance terms that would otherwise preclude the transfer of control. Performance obligations related to our software licenses, including the license portion of our software subscriptions, grant the customer the right to use our software primarily via electronic delivery. Service revenues consist of repair and calibration services, extended warranties, technical support for hardware and software, when-and-if available software updates and upgrades, and professional services, including installation and implementation, consulting, and training. Services include both hardware and software services. Repair and calibration services for hardware products are sold both as per-incident customer services and as customer agreements to provide such services over the contractual period. Extended warranties are optional to the customer and provide warranty on hardware products for additional years beyond the standard one-year warranty. Technical support for software and when-and-if available software updates and upgrades are sold either together with our software licenses and software subscriptions, or separately as part of our customer support programs. These are considered stand-ready performance obligations where customers benefit from the services evenly throughout the license or service period. Our professional services may be sold on a time and material basis (e.g., consulting) or on a fixed-fee basis (e.g., non-recurring engineering). We also generate revenues from a combination of products and services (“custom solutions”), including combinations of hardware, software, software subscriptions, installation, professional services, and other support services to meet customers’ unique specifications. For our contracts with customers, we account for individual performance obligations separately if they are distinct. Our standard payment terms are net 30 to 90 days, and we generally do not offer extended payment terms beyond one year. Our contracts typically contain various forms of variable consideration, including trade discounts, trade-in credits, rebates, and rights of return. The transaction price is allocated to the separate performance obligations based on relative SSP. SSPs for a majority of our products and services are estimated based on our established pricing practices and maximize the use of observable inputs. An observable input is the price of the good or service when it is sold as a separate item in a similar circumstance and to a similar customer as in the contract for which SSPs are being determined. We have elected to exclude from the measurement of the transaction price all taxes assessed by a governmental authority that are both imposed on and concurrent with a specific revenue-producing transaction and collected by Keysight from a customer (e.g., sales, use, value added, and some excise taxes). We have also elected to account for shipping and handling activities that occur after control of the related good transfers as fulfillment activities instead of assessing such activities as performance obligations. Our typical performance obligations include the following:
Significant judgment is required to determine the SSP for each distinct performance obligation. Many of our contracts include multiple performance obligations with a combination of distinct products and services, maintenance and support, professional services, and/or training. For contracts with multiple performance obligations, we allocate the total transaction value to each distinct performance obligation based on relative SSP. In doing so, we consider our internal price list for each product and service, which reflects our desired profitability, based on an expected level of sales, and adjust for factors such as competition, customer relationship, discount provided in the contract, geographic location, and the products and services purchased in the arrangement. We use a range based on actual historical sales to determine whether the calculated SSP for a product or service is a fair representation of the SSP. For capitalized contract costs, we use judgment in determining the capitalized amount and amortization period. Our products are generally sold with a right of return, and we may provide other credits, discounts, or incentives, which are accounted for as variable consideration at the portfolio level and estimated based on historical information. Returns, credits, and discounts are estimated at contract inception and updated at the end of each reporting period as additional information becomes available to the extent that it is probable a significant reversal of the cumulative amount of revenue recognized will not occur once the variability is subsequently resolved. See Note 3, “Revenue,” for additional information. Shipping and handling costs. Our shipping and handling costs charged to customers are included in “revenue” and the associated expense is recorded in “cost of products” for all periods presented. Deferred revenue. We recognize contract liabilities in our consolidated balance sheet as deferred revenue, which represents the amount of service and software revenue deferred and recognized over the contractual period or as services are rendered and accepted by the customer. In addition, it includes the amount allocated to undelivered performance obligations. Accounts receivable, net. Trade accounts receivable is recorded at the invoiced amount and does not bear interest. Such accounts receivable has been reduced by an allowance for credit losses, which is our best estimate of the amount of probable credit losses in our existing accounts receivable. We determine the allowance based on customer specific experience and the aging of such receivables, among other factors. The allowance for credit losses was approximately $12 million and $9 million, respectively, as of October 31, 2025 and 2024. Share-based compensation. We account for share-based awards made to our employees and directors, including restricted stock units (“RSUs”), employee stock purchases made under our employee stock purchase plan (“ESPP”), employee stock option awards, and performance share awards under our Long-Term Performance (“the LTP”) Program, using the estimated grant date fair value on a straight-line basis over the requisite service period of the award. Forfeitures are recognized as they occur and are reductions from share-based compensation expense. See Note 4, “Share-Based Compensation,” for additional information. Inventory. Inventory is valued at standard cost, which approximates actual cost computed on a first-in, first-out basis, not exceeding net realizable value. We assess the valuation of our inventory periodically and adjust the value for estimated excess and obsolete inventory based on future demand and actual usage. See Note 13, “Supplemental Financial Information,” for additional information. Warranty. Keysight warranties on products sold through direct sales channels are primarily for one year. Warranties for products sold through distribution channels are primarily for three years. We accrue for standard warranty costs based on historical trends in warranty charges. The accrual is reviewed regularly and periodically adjusted to reflect changes in warranty cost estimates. Estimated warranty charges are recorded within “cost of products” at the time related product revenue is recognized. See Note 13, “Supplemental Financial Information,” for additional information. We also sell extended warranties that provide warranty coverage beyond the standard warranty term. Revenue associated with extended warranties is deferred and recognized over the extended coverage period. Loss contingencies. We accrue for probable losses from contingencies, including legal settlement costs, on an undiscounted basis when such costs are considered probable of being incurred and are reasonably estimable. We periodically evaluate available information, both internal and external, relative to such contingencies and adjust this accrual as necessary. If a loss is reasonably possible but not probable, or if the amount cannot be reasonably estimated, we disclose the nature of the contingency and, where practicable, an estimate of the possible loss or range of loss. Taxes on income. Income tax expense is based on income or loss before taxes. Deferred income taxes reflect the effect of temporary differences between asset and liability amounts that are recognized for financial reporting purposes and the amounts that are recognized for income tax purposes. These deferred taxes are measured by applying currently enacted tax laws. Valuation allowances are recognized to reduce deferred tax assets to the amount that is more likely than not to be realized. We account for uncertainty in income taxes using a two-step approach to recognize and measure uncertain tax positions. The first step is to evaluate the tax position for recognition by determining if the weight of available evidence indicates that it is more likely than not that the position will be sustained on audit, including resolution of related appeals or litigation processes, if any. The second step is to measure the tax benefit as the largest amount that is more than 50 percent likely of being realized upon settlement. We make adjustments to these reserves when facts and circumstances change, such as the closing of a tax audit or the refinement of an estimate due to new information. We classify the liability for unrecognized tax benefits as current to the extent that the company anticipates payment (or receipt) of cash within one year. Interest and penalties related to uncertain tax positions are recognized in “provision for income taxes.” Given the number of years and numerous matters that remain subject to examination in various tax jurisdictions, we are unable to estimate the range of possible changes to the balance of our unrecognized tax benefits. See Note 5, “Income Taxes,” for additional information. Business Combinations. We include the results of operations of the businesses that we acquire as of the acquisition date. We allocate the purchase price of the acquisitions to the assets acquired and liabilities assumed based on their estimated fair values, except for revenue contracts acquired, which are recognized in accordance with our revenue recognition policy. The excess of the purchase price over the estimated fair values of identifiable assets and liabilities is recorded as “goodwill.” Acquisition-related expenses are recognized separately from the business combination and are expensed as incurred. See Note 2, “Acquisitions,” for additional information. Goodwill and other intangible assets. Goodwill is assessed for impairment on a reporting unit basis at least annually in the fourth quarter, as of September 30, after the annual update to our long-term financial forecasts, or more frequently when events and circumstances occur indicating that the recorded goodwill may be impaired. The impairment test compares the fair value of a reporting unit with its carrying amount, with an impairment charge recorded for the amount by which the carrying amount exceeds the reporting unit’s fair value up to a maximum amount of the goodwill balance for the reporting unit. Other intangible assets with finite lives consist primarily of developed technologies, trademarks, customer relationships, non-compete agreements, and acquired backlog and are amortized using the straight-line method over estimated useful lives ranging from 1 to 12 years. We review other intangible assets for impairment whenever events or changes in business circumstances indicate that the carrying amount of the assets may not be fully recoverable or that the useful lives of these assets are no longer appropriate. Other intangible assets with indefinite-lives are generally in-process research and development (“IPR&D”) intangible assets. The authoritative accounting guidance allows a qualitative approach for testing indefinite-lived intangible assets for impairment, similar to the impairment testing guidance for goodwill. It allows the option to first assess qualitative factors (events and circumstances) that could have affected the significant inputs used in determining the fair value of the indefinite-lived intangible asset. The qualitative factors assist in determining whether it is more likely than not that the indefinite-lived intangible asset is impaired. An organization may choose to bypass the qualitative assessment for any indefinite-lived intangible asset in any period and proceed directly to calculating its fair value. We review IPR&D for impairment annually or whenever events or changes in business circumstances indicate that the carrying amount of the assets may not be fully recoverable. See Note 2, “Acquisitions,” and Note 7, “Goodwill and Other Intangible Assets,” for additional information about our goodwill and other intangible assets. Impairment of long-lived assets. We continually monitor events and changes in circumstances that could indicate carrying amounts of long-lived assets may not be recoverable. When such events or changes in circumstances occur, we assess the recoverability of long-lived assets by determining whether the carrying value of such assets will be recovered through undiscounted expected future cash flows. If the total of the undiscounted future cash flows is less than the carrying amount of those assets, we recognize an impairment loss based on the excess of the carrying amount over the fair value of the assets. Advertising. Advertising costs are expensed as incurred and were $14 million in 2025, $18 million in 2024, and $24 million in 2023. Research and development. Costs related to the research, design, and development of our products are charged to research and development (“R&D”) expense as they are incurred. Government assistance. Keysight receives various forms of government assistance, primarily through grants related to the development of new products and tax credits related to capital expenditures. We record proceeds from government grants when there is reasonable assurance that we will comply with the relevant conditions of the grant agreement and the grant funds will be received. Grants in recognition of specific expenses are recognized in the same period as an offset to those related expenses. Grants in form of tax credits related to capital expenditures are recognized as a reduction to property, plant and equipment with a corresponding reduction to depreciation expense over the expected useful life of the related asset. Grants received from new or existing arrangements in 2025, 2024, and 2023 were $2 million, $8 million, and $4 million, respectively, and are included as an offset to “research and development” in the consolidated statement of operations. Grant proceeds receivable as of October 31, 2025 and 2024 were $5 million and $6 million, respectively, and are included in “other current assets” in the consolidated balance sheet. Grant proceeds received prior to Keysight meeting the conditions of the grant are included in “other accrued liabilities” and “other long-term liabilities” in the consolidated balance sheet and were $6 million as of October 31, 2025 and $4 million as of October 31, 2024. Grant income included in “other operating income (expense), net” in the consolidated statement of operations was not material for fiscal 2025, 2024, and 2023. Tax credits related to capital expenditures reduced property, plant and equipment by $1 million and $7 million in 2025 and 2024, respectively. Investments. Investments with readily determinable fair values are reported at fair value. Equity investments without readily determinable fair values are measured at cost with adjustments for observable changes in price or impairments. Gains or losses resulting from changes in fair value are recognized currently in earnings. The company assesses investments for impairment whenever events or changes in circumstances indicate that the carrying value of an investment may not be recoverable. There were no impairments recognized in 2025, 2024, and 2023. Fair value of financial instruments. The carrying values of certain of our financial instruments, including cash and cash equivalents, accounts receivable, accounts payable, and other accrued liabilities, approximate fair value because of their short maturities. The fair value of long-term equity investments is determined using quoted market prices for those securities when available. For those long-term equity investments accounted for under a measurement alternative, the carrying value approximates estimated fair value. The fair value of foreign currency contracts used for hedging purposes is estimated internally by using inputs tied to active markets. These inputs, for example, interest rate yield curves, foreign exchange rates, and forward and spot prices for currencies, are observable in the market or can be corroborated by observable market data for substantially the full term of the assets or liabilities. See Note 8, “Fair Value Measurements,” for additional information. Net income per share. Basic net income per share is computed by dividing net income by the weighted average number of common shares outstanding during the period excluding the dilutive effect of share-based awards. Diluted net income per share gives effect to all potentially dilutive common stock equivalents outstanding during the period. The dilutive effect of share-based awards is reflected in diluted net income per share by application of the treasury stock method, which includes consideration of unamortized share-based compensation expense, and the dilutive effect of in-the-money options, non-vested RSUs, LTP program awards, and potential ESPP issuances. Under the treasury stock method, the amount the employee must pay for exercising stock options and unamortized share-based compensation expense are assumed proceeds to be used to repurchase hypothetical shares. Potentially dilutive shares whose effect would have been antidilutive are excluded from the computation of diluted net income per share. See Note 6, “Net Income Per Share,” for additional information. Cash, cash equivalents and short-term investments. We classify investments as cash equivalents if their original maturity or remaining maturity at the time of purchase is three months or less at the date of purchase. Cash equivalents are stated at cost, which approximates fair value. Our cash and cash equivalents mainly consist of investments in institutional money market funds, short-term deposits held at major global financial institutions, and similar short duration instruments with original maturities of three months or less. We continuously monitor the creditworthiness of the financial institutions in which we invest our funds. We utilize a variety of funding strategies in an effort to ensure that our worldwide cash is available in the locations in which it is needed. Most significant international locations have access to internal funding through an offshore cash pool for working capital needs. In addition, a few locations that are unable to access internal funding have access to temporary local overdraft and short-term working capital lines of credit. We classify investments as short-term investments if their original maturities are greater than three months and their remaining maturities are one year or less. Concentration of credit risk. Financial instruments that potentially subject us to concentration of credit risk principally includes cash and cash equivalents, short-term and long-term investments, derivative financial instruments, and accounts receivables. Cash and cash equivalents primarily consists of money market fund investments, time deposits, and demand deposit balances. We invest in a variety of financial instruments and limit the amount of credit exposure with any one financial institution. We have a comprehensive credit policy in place and credit exposure is monitored on an ongoing basis. Credit risk with respect to our accounts receivable is diversified due to the large number of entities comprising our customer base and their dispersion across many different industries and geographies. Credit evaluations are performed on customers requiring credit over a certain amount. Credit risk is mitigated through collateral, such as letters of credit, bank guarantees, or payment terms like cash in advance. No single customer accounted for more than 10 percent of accounts receivable as of October 31, 2025 or 2024. Derivative instruments. We are exposed to global foreign currency exchange rate fluctuations in the normal course of business. We enter into foreign exchange hedging contracts and primarily use forward contracts to manage financial exposures resulting from changes in foreign currency exchange rates. Foreign currency exposures include committed and anticipated revenue and expense transactions (cash flow exposure) and monetary assets and liabilities that are denominated in currencies other than the functional currency of the subsidiary (balance sheet exposure). For cash flow hedges, contracts are designated at inception as hedges of the related foreign currency exposures. We formally document all relationships between hedging instruments and hedged items, as well as our risk-management objective and strategy for undertaking various hedge transactions at the inception of the hedge. This process includes linking all derivatives that are designated as cash flow hedges to specific forecasted transactions. We also formally assess, both at the hedge’s inception and on an ongoing basis, whether the hedging instruments are highly effective in offsetting changes in cash flows of hedged items. Our foreign exchange cash flow hedging contracts have maturities based on a rolling period of up to twelve months. We do not use derivative financial instruments for speculative trading purposes. All derivatives are recognized on the balance sheet at their fair values. For derivative instruments that are designated and qualify as cash flow hedges, changes in the value of the effective portion of the derivative instruments are recognized in accumulated other comprehensive income (loss), a component of stockholders' equity. Amounts associated with cash flow hedges are reclassified and recognized in income when either the forecast transaction occurs or it becomes probable the forecast transaction will not occur. Derivatives not designated as hedging instruments are recorded on the balance sheet at fair value, and changes in fair value are recorded in earnings in the current period. Derivative instruments are subject to master netting arrangements with the respective counterparties to allow for net settlement under certain conditions. Cash flows from derivative instruments are classified in the statement of cash flows in the same category as the cash flows from the hedged or economically hedged item, primarily in operating activities. See Note 9, “Derivatives,” for additional information. Property, plant and equipment. Property, plant and equipment are stated at cost less accumulated depreciation. Additions, improvements, and major renewals are capitalized; maintenance, repairs, and minor renewals are expensed as incurred. When assets are retired or disposed of, the assets and related accumulated depreciation are removed from our general ledger, and the resulting gain or loss is reflected in the consolidated statement of operations. We use the straight-line method to depreciate assets. Buildings and improvements are depreciated over the lesser of their useful lives, which is generally over five years to forty years, or the remaining term of the lease; and machinery and equipment is generally depreciated over three years to ten years. See Note 13, “Supplemental Financial Information,” for additional information. Leases. We determine whether an arrangement is a lease at inception. Operating leases are included in “operating lease right-of-use (“ROU”) assets” and “operating lease liabilities” (current and non-current) on our consolidated balance sheet. Finance leases are included in “property, plant and equipment, net,” “other accrued liabilities,” and “other long-term liabilities” in our consolidated balance sheet. Our finance lease and lessor arrangements were immaterial in 2025, 2024, and 2023. ROU assets and lease obligations are recognized based on their present value of the future minimum lease payments over the lease term at commencement date. As most of our leases do not provide an implicit rate, we use our incremental borrowing rate based on the lease term and economic environment to discount lease obligations. ROU assets also include any lease payments made and exclude lease incentives and initial direct costs incurred. We initially measure payments based on an index by using the applicable rate at lease commencement. Variable payments that do not depend on an index are not included in the lease liability and are recognized as they are incurred. See Note 10, “Leases,” for additional information. Restructuring costs. The main component of our existing restructuring plans is related to workforce reductions and site restructuring. Workforce reduction charges are accrued when payment of benefits becomes probable and the amounts can be estimated. If the amounts and timing of cash flows from restructuring activities are significantly different from what we have estimated, the actual amount of restructuring and other related charges could be materially different, either higher or lower, than those we have recorded. Employee compensation and benefits. Amounts owed to employees, such as accrued salary, bonuses, and vacation benefits are reported within “employee compensation and benefits” in the consolidated balance sheet. The total amount of accrued vacation benefit was $130 million and $114 million as of October 31, 2025 and 2024, respectively. Foreign currency translation. We translate and remeasure balance sheet and statement of operations items into U.S. dollars. For those subsidiaries that operate in a local currency functional environment, all assets and liabilities are translated into U.S. dollars using current exchange rates at the balance sheet date; revenue and expenses are translated using monthly exchange rates that approximate average exchange rates. Resulting translation adjustments are reported as a separate component of “accumulated other comprehensive income (loss)” in stockholders' equity in our consolidated balance sheet. For those subsidiaries that operate in a U.S. dollar functional environment, foreign currency assets and liabilities are re-measured into U.S. dollars at current exchange rates except for non-monetary assets and capital accounts, which are remeasured at historical exchange rates. Revenue and expenses are generally remeasured at monthly exchange rates that approximate average exchange rates. Gains or losses from foreign currency re-measurement are included in “net income.” Net gains or losses resulting from foreign currency asset and liability remeasurement transactions are reported in “other income (expense), net” and were a $47 million gain in 2025, a $19 million gain in 2024, and a $49 million loss in 2023. See Note 9, “Derivatives” for additional information. Retirement plans and post-retirement benefit plan assumptions. Defined benefit plan obligations are remeasured at least annually as of October 31, based on the present value of future benefit payments to reflect future benefit costs over the employees' average expected future service to Keysight based on the terms of the plans. To estimate the present value of these future payments, we are required to make assumptions using actuarial concepts within the framework of GAAP. Two critical assumptions are the discount rate and the expected long-term return on plan assets. Other important assumptions include expected future salary increases, expected future increases to benefit payments, expected retirement dates, employee turnover, retiree mortality rates, and investment portfolio composition. We evaluate these assumptions at least annually. See Note 12, “Retirement Plans and Post-Retirement Benefit Plans,” for additional information. New Accounting Pronouncements Accounting Standards Update (“ASU”) 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures. In November 2023, the Financial Accounting Standards Board (“FASB”) issued guidance which requires us to disclose significant segment expenses and other segment items used by the Chief Operating Decision Maker (“CODM”) on an annual and interim basis as well as provide in interim periods all disclosures about a reportable segment’s profit or loss and assets that are currently required annually. Additionally, we are required to disclose the title and position of the CODM. The new standard is effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024, with early adoption permitted. We adopted this guidance during 2025 (see Note 16). ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures. In December 2023, the FASB issued guidance which requires disclosure of disaggregated income taxes paid, prescribes standard categories for the components of the effective tax rate reconciliation, and modifies other income tax related disclosures. This standard is effective for fiscal years beginning after December 15, 2024. We are currently evaluating the impact of adopting this ASU on our consolidated financial statements and disclosures. ASU 2024-03, Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses. In November 2024, the FASB issued guidance which requires disclosure of additional expense information on an annual and interim basis, including the amounts of inventory purchases, employee compensation, depreciation and intangible asset amortization included within each income statement expense caption. This standard is effective for fiscal years beginning after December 15, 2026. We are currently evaluating the impact of adopting this ASU on our consolidated financial statements and disclosures. Other amendments to GAAP that do not require adoption until a future date are not expected to have a material impact on our consolidated financial statements upon adoption.
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ACQUISITIONS |
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| Business Combination [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| ACQUISITIONS | 2. ACQUISITIONS AND DIVESTITURES 2025 Acquisitions Acquisition of Spirent Communications plc On October 15, 2025, we completed the acquisition of the entire share capital of Spirent Communications plc (“Spirent”) for $1,564 million, using existing cash, which reflects cash consideration of 199 pence (pounds sterling) per Spirent share, and includes $14 million consideration for outstanding awards and unvested options under Spirent’s compensation plans. Total purchase consideration was determined as follows:
For the year ended October 31, 2025, revenue and net loss attributable to Spirent from the acquisition date was $9 million and $40 million, respectively, including the loss on discontinued operations of $19 million. The Spirent acquisition was accounted for in accordance with the authoritative accounting guidance. The acquired assets and assumed liabilities were recorded at their estimated fair values. We determined the estimated fair values with the assistance of valuations performed by third-party specialists, discounted cash flow analysis, and estimates made by management. The acquisition of Spirent complements our position in communications test and expands our serviceable available market. These factors, among others, contributed to a purchase price in excess of the estimated fair value of Spirent's net identifiable assets acquired (see summary of net assets below), and, as a result, we have recorded goodwill in connection with this transaction. Goodwill of $653 million and $45 million was assigned to the Communications Solutions Group (“CSG”) and Electronic Industrial Solutions Group (“EISG”) reportable segments, respectively, reflecting the expected benefits and synergies that are likely to be realized from the Spirent acquisition. We do not expect the goodwill recognized or any potential impairment charges in the future to be deductible for income tax purposes. A portion of the overall purchase price was allocated to acquired intangible assets. Amortization expense associated with acquired intangible assets is not deductible for tax purposes. Therefore, a deferred tax liability of $168 million was established primarily for the future amortization of these intangibles and is included in “other long-term liabilities” in the table below. The following table summarizes the preliminary allocation of the purchase price to the estimated fair values of the assets acquired and liabilities assumed on the closing date:
Assets and liabilities held for sale primarily included Spirent’s high-speed ethernet, network security, and channel emulation business lines, which were sold to Viavi Solutions Inc. (“Viavi”) in connection with satisfying the regulatory conditions set out as part of the Spirent acquisition. Assets held for sale primarily comprises goodwill of $55 million, other intangible assets of $346 million, consisting primarily of developed technology of $295 million and customer relationships of $50 million, inventory of $26 million, and other assets of $6 million allocated to the divestiture on the relative fair value basis. Developed technology and customer relationships were valued using the relief from royalty and multi-period excess earnings valuation methods, respectively. Liabilities held for sale primarily represents deferred revenue and other accruals. See “Spirent-related divestiture” below for further details. The fair values of cash and cash equivalents, accounts receivable, other current assets, accounts payable, employee compensation and benefits, and deferred revenue were generally determined using historical carrying values given the short-term nature of these assets and liabilities. The fair values of acquired inventory, property, plant and equipment, and intangible assets were determined with the input from third-party valuation specialists. The fair values of certain other assets and liabilities were determined internally using historical carrying values and estimates made by management. In connection with the acquisition and determination of the fair values of acquired assets and assumed liabilities, the company is in the process of obtaining additional information to refine its initial fair value estimates related to income taxes, intangible assets, inventory, and property, plant and equipment. We expect to finalize this allocation in the second quarter of fiscal year 2026. As additional information becomes available, we may revise the preliminary purchase price allocation during the remainder of the measurement period (which will not exceed 12 months from the acquisition date). Any such revisions or changes may be material. Valuation of Intangible Assets Acquired The components of intangible assets acquired in connection with the Spirent acquisition were as follows:
As noted above, the intangible assets were valued using various income approach methods and significant assumptions. Significant assumptions related to developed technology included royalty rate, obsolescence rate, revenue growth rate, earnings before interest and taxes, discount rate, and total operating expenses. Significant assumptions related to customer relationships included customer attrition rate, developed technology royalty rate, revenue growth rate, earnings before interest and taxes, discount rate, and total operating expenses. Similar significant assumptions were used to value developed technology and customer relationships included in assets held for sale for the Spirent-related divestiture. Acquisition and integration costs directly related to the Spirent acquisition are included in selling, general and administrative and other income (expense), net and were $42 million for the year ended October 31, 2025. For the year ended October 31, 2025, we incurred $7 million of acquisition-related compensation expense to redeem certain of Spirent's outstanding unvested stock awards as of the date of the acquisition that were determined to relate to post-merger service periods. Spirent-related divestiture On October 16, 2025, we sold Spirent’s high-speed ethernet, network security, and channel emulation business lines for $399 million to Viavi, resulting in an immaterial pre-tax loss. In connection with the sale, we agreed to provide transitional services to the buyer on a short-term basis. We do not have any material continuing involvement with this business and have presented its results in discontinued operations. The following table summarizes the selected financial information of discontinued operations:
Net loss from discontinued operations before income taxes includes $5 million of acquisition-related compensation to redeem certain outstanding unvested stock awards as of the date of the acquisition that were determined to relate to post-merger service periods. Acquisition of Synopsys’ Optical Solutions Group On October 17, 2025, we acquired the Optical Solutions Group business (“OSG”) from Synopsys, Inc. for $581 million, using existing cash, including $3 million consideration for outstanding awards and unvested options under Synopsys’ compensation plans. For the year ended October 31, 2025, the OSG acquisition had an immaterial impact on our revenue and net earnings. The OSG acquisition was accounted for in accordance with the authoritative accounting guidance. The acquired assets and assumed liabilities were recorded at their estimated fair values. We determined the estimated fair values with the assistance of valuations performed by third-party specialists, discounted cash flow analysis, and estimates made by management. The acquisition of OSG expands our design engineering software portfolio and computer-aided engineering capabilities, enabling customers to take innovative designs to market faster. These factors, among others, contributed to a purchase price in excess of the estimated fair value of OSG's net identifiable assets acquired (see summary of net assets below), and, as a result, we have recorded goodwill in connection with this transaction. Goodwill of $67 million and $231 million was assigned to the CSG and EISG reportable segments, respectively, reflecting the expected benefits and synergies that are likely to be realized from the OSG acquisition. We do not expect the goodwill recognized or any potential impairment charges in the future to be deductible for income tax purposes. The following table summarizes the preliminary allocation of the purchase price to the estimated fair values of the assets acquired and liabilities assumed on the closing date:
The fair values of accounts receivable, other current assets, and deferred revenue were generally determined using historical carrying values given the short-term nature of these assets and liabilities. The fair values of intangible assets were determined with the input from third-party valuation specialists. The fair values of certain other assets and liabilities were determined internally using historical carrying values and estimates made by management. In connection with the acquisition and determination of the fair values of acquired assets and assumed liabilities, the company is in the process of obtaining additional information to refine its initial fair value estimates related to intangible assets. We expect to finalize this allocation in the second quarter of fiscal year 2026. As additional information becomes available, we may revise the preliminary purchase price allocation during the remainder of the measurement period (which will not exceed 12 months from the acquisition date). Any such revisions or changes may be material. Valuation of Intangible Assets Acquired The components of intangible assets acquired in connection with the OSG acquisition were as follows:
As noted above, the intangible assets were valued using various income approach methods and significant assumptions. Significant assumptions related to developed technology included royalty rate, obsolescence rate, revenue growth rate, earnings before interest and taxes, discount rate, and total operating expenses. Significant assumptions related to customer relationships included customer attrition rate, developed technology royalty rate, revenue growth rate, earnings before interest and taxes, discount rate, and total operating expenses. The in-process research and development was valued by discounting forecasted cash flows directly related to the products expecting to result from the projects, net of returns on contributory assets. A discount rate of 11% was used to value the research and development projects to reflect the additional risks inherent in the acquired projects. The primary in-process projects acquired relate to next generation products which will be released in the near future. Total costs to complete for all OSG in-process research and development were estimated at approximately $2 million as of the close date. Acquisition and integration costs directly related to the OSG acquisition are included in selling, general and administrative expenses and were $18 million for the year ended October 31, 2025. For the year ended October 31, 2025, we incurred $1 million of acquisition-related compensation expense to redeem certain of Synopsys’ outstanding unvested stock awards as of the date of the acquisition that were determined to relate to post-merger service periods. Acquisition of Ansys’ PowerArtist On October 17, 2025, we acquired PowerArtist business from Ansys, Inc. for $26 million, expanding our design engineering software portfolio and computer-aided engineering capabilities, enabling customers to take innovative designs to market faster. We recognized goodwill and other intangible assets of $2 million and $17 million, respectively, based on the preliminary allocation of the purchase price to the estimated fair values of the assets acquired and liabilities assumed. Goodwill was assigned to the CSG and EISG reportable segments, reflecting the expected benefits and synergies that are likely to be realized from the acquisition. We do not expect the goodwill recognized or any potential impairment charges in the future to be deductible for income tax purposes. 2024 Acquisitions Acquisition of ESI Group SA On November 3, 2023, we acquired 50.6% of the share capital of ESI Group SA (“ESI Group”) for $477 million, net of cash acquired, using existing cash. During January 2024, we completed the acquisition of the remaining share capital of ESI Group for $458 million, using existing cash. The company entered into put/call agreements valued at $7 million for certain ESI Group equity awards, subject to a holding period that may extend beyond the explicit vesting period, for the right to receive a cash payment equal to the public tender offer consideration of 155 euros per share, which was fully paid as of the third quarter of fiscal year 2025. For the year ended October 31, 2024, ESI Group's net revenue was $141 million and net loss attributable to Keysight shareholders was $68 million. The ESI Group acquisition was accounted for in accordance with the authoritative accounting guidance. The acquired assets and assumed liabilities were recorded at their estimated fair values. We determined the estimated fair values with the assistance of valuations performed by third-party specialists, discounted cash flow analysis, and estimates made by management. The acquisition of ESI Group expands our application layer portfolio with simulation capabilities that are critical to accelerate innovation in multiple end markets. These factors, among others, contributed to a purchase price in excess of the estimated fair value of ESI Group's net identifiable assets acquired (see summary of net assets below), and, as a result, we have recorded goodwill in connection with this transaction. Goodwill was assigned to the CSG and EISG reportable segments, based on the expected benefits and synergies that are likely to be realized from the ESI Group acquisition. We do not expect the goodwill recognized or any potential impairment charges in the future to be deductible for income tax purposes. A portion of the overall purchase price was allocated to acquired intangible assets. Amortization expense associated with acquired intangible assets is not deductible for tax purposes. Therefore, a deferred tax liability of $98 million was established primarily for the future amortization of these intangibles and is included in “other long-term liabilities” in the table below. The following table summarizes the allocation of the purchase price to the estimated fair values of the assets acquired and liabilities assumed on the closing date:
The fair values of cash and cash equivalents, short-term investments, accounts receivable, other current assets, accounts payable, employee compensation and benefits, and deferred revenue were generally determined using historical carrying values given the short-term nature of these assets and liabilities. The fair values of intangible assets were determined with the input from third-party valuation specialists. The fair values of property, plant and equipment and certain other liabilities were determined internally using historical carrying values and estimates made by management. Valuation of Intangible Assets Acquired The components of intangible assets acquired in connection with the ESI Group acquisition were as follows:
As noted above, the intangible assets were valued using different income approach methods. The significant assumptions used to estimate the fair value of the acquired intangible assets included revenue growth rates, earnings before interest and taxes, customer attrition rate, discount rate, obsolescence rate, and total operating expenses. The in-process research and development was valued by discounting forecasted cash flows directly related to the products expecting to result from the projects, net of returns on contributory assets. A discount rate of 12% was used to value the research and development projects to reflect the additional risks inherent in the acquired projects. The primary in-process projects acquired relate to next generation products which will be released in the near future. Total costs to complete for all ESI Group in-process research and development were estimated at approximately $7 million as of the close date. Acquisition and integration costs directly related to the ESI Group acquisition are included in research and development, selling, general and administrative, other operating expense (income), net and other income (expense), net and were $39 million for the year ended October 31, 2024. For the year ended October 31, 2024, we incurred $10 million of acquisition-related compensation expense to redeem certain of ESI Group's outstanding unvested stock awards as of the date of the acquisition that were determined to relate to post-merger service periods. Acquisition of Riscure Holding B.V. On February 21, 2024, we acquired all the outstanding share capital of Riscure Holding B.V. (“Riscure”) for $78 million, net of cash acquired, expanding our automated security assessment capabilities and solutions for semiconductors, embedded systems, and connected devices. We recognized goodwill and other intangible assets of $52 million and $35 million, respectively, based on the allocation of the purchase price to the estimated fair values of the assets acquired and liabilities assumed. Goodwill was assigned to the CSG reportable segment, based on the expected benefits and synergies that are likely to be realized from the Riscure acquisition. We do not expect the goodwill recognized or any potential impairment charges in the future to be deductible for income tax purposes. Acquisition of AnaPico AG On June 12, 2024, we acquired all the outstanding share capital of AnaPico AG (“AnaPico”) for $117 million, net of cash acquired, accelerating our strategy to expand our customer base in commercial communications, automotive, aerospace, defense, and government markets. We recognized goodwill and other intangible assets of $60 million and $53 million, respectively, based on the allocation of the purchase price to the estimated fair values of the assets acquired and liabilities assumed. The identified intangible assets primarily consist of developed technology of $28 million, customer relationships of $12 million, backlog of $1 million, and in-process research and development of $12 million. The estimated useful lives of developed technology is 9 years, customer relationships is 9 years, and backlog is 1 year. Goodwill was assigned to the CSG and EISG reportable segments, based on the expected benefits and synergies that are likely to be realized from the AnaPico acquisition. We do not expect the goodwill recognized or any potential impairment charges in the future to be deductible for income tax purposes. Supplemental Pro Forma Information (Unaudited) The following represents pro forma operating results as if Spirent and OSG had been consolidated effective at the beginning of fiscal 2024, and ESI Group had been consolidated effective at the beginning of fiscal 2023:
The unaudited pro forma financial information for the fiscal years 2025 and 2024 combines the historical results of Keysight, Spirent, OSG, and ESI Group, assuming Spirent and OSG were combined as of November 1, 2023, and ESI Group was combined as of November 1, 2022. The pro forma information includes business combination accounting effects from the acquisition including amortization and depreciation charges from acquired intangible assets and property, plant and equipment, stock-based compensation expense, acquisition-related transaction costs, and tax-related effects. Gains resulting from our foreign exchange contracts to hedge the Spirent acquisition price of $51 million and $23 million were included in 2025 and 2024, respectively. Losses resulting from our foreign exchange contracts to hedge the ESI Group acquisition price of $18 million was included in 2024. The pro forma information as presented above is for informational purposes only and is not indicative of the results of operations that would have been achieved if the acquisition had taken place at the beginning of fiscal 2024. Pro forma results of operations for other acquisitions in 2025 and 2024 have not been presented because the effects of the acquisitions were not material to the company’s financial results.
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| Revenue from Contract with Customer [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Revenue from Contract with Customer [Text Block] | 3. REVENUE Disaggregation of Revenue We disaggregate our revenue from contracts with customers by geographic region, end market, and timing of revenue recognition, as we believe these categories best depict how the nature, amount, timing and uncertainty of our revenue and cash flows are affected by economic factors. Disaggregated revenue is presented for each of our reportable segments, CSG and EISG.
Our point-in-time revenues are generated predominantly from the sale of various types of design and test software and hardware, and per-incident repair and calibration services. Perpetual software and the portion of term software subscription revenue in this category represents revenue recognized up front upon transfer of control at the time of electronic delivery. Revenue on per-incident repair and calibration services is recognized when services are performed. Over-time revenues are generated predominantly from the repair and calibration contracts, extended warranties, technical support for hardware and software, certain software subscription and Software as a Service (“SaaS”) product offerings, and professional services. Technical support for software and when-and-if available software updates and upgrades are sold either together with our software licenses and software subscriptions, including SaaS, or separately as part of our customer support programs. Additionally, we provide custom solutions that include combinations of hardware, software, software subscriptions, installation, professional services, and other support services, and revenue may be recognized either up front on delivery or over time depending upon the terms of the contract. Contract Balances Contract assets Contract assets consist of unbilled receivables and are recorded when revenue is recognized in advance of scheduled billings to our customers. These amounts are primarily related to solutions and support arrangements when transfer of control has occurred but we have not yet invoiced. The contract assets balances were $125 million and $88 million as of October 31, 2025 and October 31, 2024, respectively, and are included in “accounts receivables, net” and “other assets” in our consolidated balance sheet. Contract costs We capitalize direct and incremental costs incurred to acquire contracts for which the associated revenue is expected to be recognized in future periods. We have determined that certain employee and third-party representative commission programs meet the requirements to be capitalized. These costs are initially deferred and typically amortized over the term of the customer contract which corresponds to the period of benefit. Capitalized contract costs were $44 million and $35 million as of October 31, 2025 and October 31, 2024, respectively, and are included in “other current assets” and “other assets” in the consolidated balance sheet. The amortization expense associated with these capitalized costs was $63 million, $57 million, and $62 million for the years ended October 31, 2025, 2024, and 2023, respectively. Contract liabilities Our contract liabilities consist of deferred revenue that arises when we receive consideration in advance of providing the goods or services promised in the contract. Contract liabilities are primarily generated from customer deposits received in advance of shipments for products or rendering of services and are recognized as revenue when products are shipped and services are provided to the customer. We classify deferred revenue as current or non-current based on the timing of when we expect to recognize revenue. The following table provides a roll-forward of our contract liabilities, current and non-current:
For the fiscal years 2025, 2024, and 2023, the revenue recognized from the contract liability balances as of October 31, 2024, 2023, and 2022 was $513 million, $541 million, and $490 million, respectively. Remaining Performance Obligations Our expected remaining performance obligations, excluding contracts that have an original expected duration of one year or less, was approximately $629 million as of October 31, 2025, and represents the company’s obligation to deliver products and services and obtain customer acceptance on delivered products. As of October 31, 2025, we expect to fulfill 51 percent of these remaining performance obligations in 2026, 35 percent in 2027 and 14 percent thereafter.
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SHARE-BASED COMPENSATION |
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| SHARE-BASED COMPENSATION | 4. SHARE-BASED COMPENSATION Keysight accounts for share-based awards in accordance with the provisions of the authoritative accounting guidance, which requires the measurement and recognition of compensation expense for all share-based payment awards made to our employees and directors, including RSUs, employee stock purchases made under our ESPP, employee stock option awards, and performance share awards granted to selected members of our senior management under the LTP Program, based on estimated fair values. Description of Keysight’s Share-Based Plans The 2014 Equity and Incentive Compensation Plan (“2014 Stock Plan”) was adopted on July 16, 2014 and became effective on November 1, 2014. It has been subsequently amended and restated multiple times by our board of directors with the most recent amendments taking effect on March 21, 2024, following stockholders approval. The maximum number of shares of common stock that may be issued under the plan is 28 million. The plan provides for the grants of awards in the form of stock options, stock appreciation rights, restricted stock, RSUs, performance-based shares and units, and cash awards. As of October 31, 2025, approximately 8 million shares were available for future awards. RSUs under our share-based plans are granted to directors, executives, and employees. The estimated fair value of the RSUs granted under the 2014 Stock Plan is determined based on the market price of Keysight common stock on the date of grant. RSUs generally vest, with some exceptions, at a rate of 25 percent per year over a period of four years from the date of grant. Performance share awards under the LTP Program, administered through the 2014 Stock Plan, are granted to the company's executive officers and key employees. Participants in this program are entitled to receive unrestricted company shares after a three-year performance period, contingent upon the achievement of metrics and targets set by the Compensation and Human Capital Committee at the beginning of the performance period. These metrics may include total shareholder return (“TSR”), financial metrics like operating margin (“OM”), cost synergies, and others. For TSR-based awards the peer group comparisons are set at the beginning of the performance period, while OM targets are set each year in the first quarter of the respective year. The final payout under the LTP Program may range from zero to 200 percent of the target award based on actual performance. The ESPP was adopted on July 16, 2014 and became effective on November 1, 2014. It was amended and restated effective March 21, 2024. The maximum number of shares of common stock that may be issued under the plan is 25 million. The ESPP allows eligible employees to contribute up to 10 percent of their base compensation to purchase shares of Keysight common stock at 85 percent of the closing market price at the purchase date. Under our ESPP, employees purchased 497,913 shares for $62 million in 2025, 562,455 shares for $64 million in 2024, and 477,760 shares for $64 million in 2023. As of October 31, 2025, common stock authorized and available for issuance under our ESPP was 17,322,109 shares, which includes shares issued in November 2025 to participants in consideration of the aggregate contribution of $32 million as of October 31, 2025. Impact of Share-based Compensation Awards Share-based compensation expense has been recognized using a straight-line amortization method over the requisite service period. The impact of share-based compensation expense on our consolidated statement of operations was as follows:
For 2025 and 2024, total share-based compensation expense includes $8 million and $10 million, respectively, of acquisition-related compensation to redeem certain outstanding unvested stock awards as of the date of the acquisition that were determined to relate to post-merger service periods. Valuation Assumptions The TSR-based performance awards were valued using a Monte Carlo simulation model, which requires the use of highly subjective and complex assumptions, including the price volatility of the underlying stock. The estimated fair value of restricted stock awards and the financial metrics-based performance awards (both OM and EPS) is determined based on the market price of Keysight’s common stock on the grant date. The compensation cost for financial metrics-based performance awards reflects the cost of awards that are probable to vest at the end of the performance period. The following assumptions were used to estimate the fair value of TSR-based performance awards.
The above assumptions reflect the impact of a change in the peer group comparison for the performance awards granted in fiscal year 2025 from the S&P 500 index to the individual constituents of the S&P 500 index. Share-based Payment Award Activity Non-vested Awards The following table summarizes non-vested award activity in 2025 for our LTP Program and restricted stock unit awards:
As of October 31, 2025, the unrecognized share-based compensation cost for non-vested stock awards was approximately $163 million, which is expected to be amortized over a weighted average period of 2.2 years. This includes $20 million of unrecognized compensation cost related to replacement awards that were granted to certain employees from the Spirent and OSG acquisitions to convert their unvested equity awards based on an exchange ratio as defined in the purchase agreement. Unrecognized share-based compensation cost does not include expense for financial metrics-based performance awards for which the targets have not yet been set. The total fair value of stock awards that vested in 2025, 2024, and 2023 was $132 million, $114 million, and $154 million, respectively. See Note 5, “Income Taxes,” for the tax impact on share-based award exercises and vesting.
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| Income Tax Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| INCOME TAXES | 5. INCOME TAXES The domestic and foreign components of income before taxes are:
The provision for income taxes consisted of:
In addition, included in net loss from discontinued operations is income tax expense of $13 million for 2025 related to the divestiture of Spirent’s high-speed ethernet, network security, and channel emulation business lines to Viavi. See Note 2, “Acquisitions,” for additional information. The following table presents the components of the deferred tax assets and liabilities:
The increase in deferred tax assets in 2025 as compared to 2024 primarily relates to additional U.K. capital losses from the Spirent acquisition and the capitalization of research and experimental expenditures for the U.S. tax filing group, partially offset by a decrease in deferred tax assets due to the amortization of intangibles in Singapore. The increase in deferred tax liabilities in 2025 as compared to 2024 primarily relates to intangible assets from the Spirent acquisition recognized in purchase accounting which are not deductible for tax purposes when amortized. In October 2025, we completed the acquisition of Spirent. As part of purchase accounting, we recorded net deferred tax liabilities of $168 million. This consists of $286 million of valuation allowance and $168 million of deferred tax liabilities primarily related to intangibles recorded in the Spirent purchase accounting, offset by net operating loss, capital loss, and credit carryforwards of $286 million. As of October 31, 2025, there was a deferred tax liability of $19 million for the tax liability expected to be imposed upon the repatriation of unremitted foreign earnings that are not considered indefinitely reinvested. As of October 31, 2025, the cumulative amount of undistributed earnings considered indefinitely reinvested was $105 million. No deferred tax liability has been recognized on the basis difference created by such earnings since it is our intention to indefinitely reinvest those earnings in the company’s foreign operations. The amount of the unrecognized deferred tax liability on the indefinitely reinvested earnings was $4 million. Valuation allowances require an assessment of both positive and negative evidence when determining whether it is more likely than not that deferred tax assets are recoverable. Such assessment is required on a jurisdiction-by-jurisdiction basis. The $497 million valuation allowances as of October 31, 2025 were mainly related to net operating losses in Luxembourg, capital losses, and net operating losses in the U.K., as well as California research credits from acquired entities that are subject to change in ownership limitations. As of October 31, 2025, there were U.S. federal net operating loss carryforwards of $16 million and U.S. state net operating loss carryforwards, primarily from acquired entities, of $57 million. The U.S. federal net operating losses will expire in years beginning 2027 through 2029 if not utilized. Of the total U.S. state net operating loss carryforwards, $48 million was subject to change of ownership limitations under various state tax provisions and subject to valuation allowance. The U.S. state net operating loss carryforwards will begin to expire in 2027, which will result in an immaterial tax impact if not utilized. As of October 31, 2025, there were U.S. federal foreign tax credit carryforwards of $7 million. The U.S. federal foreign tax credits will begin to expire in 2031. Due to certain limitations, $2 million of U.S. federal foreign tax credits were subject to valuation allowance. There were U.S. state research credit carryforwards of approximately $38 million. Of the total U.S. state research credit carryforwards, $21 million are California research credits that can be carried forward indefinitely, but due to change of ownership limitations, the California research credits were subject to valuation allowance. As of October 31, 2025, there were foreign net operating loss carryforwards of $925 million. Of the total foreign loss, $1 million will expire in 2026. The remaining loss consisted of $683 million that will expire in years beginning 2028 through 2044 if not utilized and $241 million that can be carried forward indefinitely. Of the $925 million of foreign net operating loss carryforward, $690 million is subject to a valuation allowance. As of October 31, 2025, there were foreign capital loss carryforwards of $1,195 million that can be carried forward indefinitely and $4 million of tax credits in foreign jurisdictions that can be carried forward indefinitely. The foreign capital loss carryforwards were subject to valuation allowance as we do not expect to generate income of the type required to utilize these losses. As of October 31, 2025, there were $130 million of interest deduction carryforwards that can be carried forward indefinitely. The differences between the U.S. federal statutory income tax rate and our effective tax rate are:
The effective tax rate was 20 percent, 29 percent, and 22 percent for 2025, 2024, and 2023, respectively. The tax rate in 2025 was lower than the U.S. statutory rate, primarily due to a lower effective tax rate on foreign earnings and the utilization of foreign tax credits, offset by U.S. taxes on GILTI inclusion, and the impact of Pillar Two minimum taxes. In July 2025, the One Big Beautiful Bill Act (“OBBBA”) was enacted into law in the U.S. The OBBBA includes numerous provisions that affect corporate taxation, including changes to bonus depreciation, the expensing of domestic research costs, and modifications to certain U.S. international tax rules. The company has analyzed the impacts of the OBBBA and reflected them in the current period. These impacts do not have a material effect on the tax rate for the year ended October 31, 2025. The majority of the tax law changes will take effect in future years. The OECD reached agreement among certain member countries to implement a global minimum tax framework, commonly referred to as Pillar Two, which established a minimum 15 percent income tax rate. Various countries have passed legislation to comply with the Pillar Two model rules. A subset of these rules became effective for Keysight in the current fiscal year. While we expect to meet transitional safe harbor requirements in most jurisdictions, there are a limited number of jurisdictions where we expect Pillar Two taxes to apply. The income tax provision for the year ended October 31, 2025 includes the effects of Pillar Two taxes, resulting in tax expense of $13 million. The decrease in the effective tax rate of 9 percentage points from 2024 to 2025 was primarily due to the absence of the 2024 one-time income tax items in 2025, partially offset by the increase of taxes on the impact of Pillar Two minimum taxes. The tax rate in 2024 was higher than the U.S. statutory rate primarily due to the impact of a one-time income tax charge to decrease deferred tax asset values from the Singapore statutory tax rate to an incentive tax rate, partially offset by a one-time income tax benefit related to the GILTI tax deductions for intangible asset amortization and the release of tax reserves related to Malaysia income tax assessment appeal. The tax rate in 2023 was higher than the U.S. statutory rate primarily due to the impact of U.S. tax capitalization of research and experimental expenditures, partially offset by the net impact from the proportion of worldwide earnings taxed at lower statutory tax rates in non-U.S. jurisdictions and the U.S. tax imposed on those non-U.S. jurisdictions. The increase in the effective tax rate of 7 percentage points from 2023 to 2024 was primarily due to the one-time income tax items in 2024. Keysight benefits from tax incentives in several jurisdictions, most significantly in Singapore and Malaysia. The tax incentives provide lower rates of taxation on certain classes of income and require thresholds of investments and employment in those jurisdictions. The Singapore tax incentive expires July 31, 2029 while the Malaysia tax incentive expired on October 31, 2025. We are in the process of renewing our Malaysia tax incentive. The calculation of our tax liabilities involves uncertainties in the application of complex tax law and regulations in a multitude of jurisdictions. Although the guidance on the accounting for uncertainty in income taxes prescribes the use of a recognition and measurement model, the determination of whether an uncertain tax position has met those thresholds requires significant judgment by management. In accordance with the guidance on the accounting for uncertainty in income taxes, for all U.S. and other tax jurisdictions, we recognize potential liabilities for anticipated tax audit issues based on our estimate of whether, and the extent to which, additional taxes and interest will be due. We include interest and penalties related to unrecognized tax positions within the provision for income taxes in the consolidated statements of operations. Accrued interest and penalties are included on the related tax liability line in the consolidated balance sheet. The aggregate changes in the balances of our unrecognized tax benefits including all federal, state, and foreign tax jurisdictions are as follows:
As of October 31, 2025, the total amount of gross unrecognized tax benefits, excluding interest and penalties, was $241 million. Of this amount, $150 million would impact our effective tax rate. Cumulatively, interest and penalties accrued as of 2025, 2024, and 2023 were $49 million, $38 million, and $41 million, respectively. We recognized a tax benefit for interest and penalties, related to unrecognized tax benefits in 2025 of $11 million, which included a tax benefit of $2 million for penalties released due to statute lapses, offset by tax expense of $13 million for interest and penalties accrued in the current year. We recognized tax benefit of $6 million and tax expense of $5 million for interest and penalties related to unrecognized tax benefits in 2024 and 2023, respectively. The open tax years for the U.S. federal income tax return and most state income tax returns are from fiscal year ending October 31, 2020 through the current tax year. For the majority of our non-U.S. entities, the open tax years are from fiscal year ending October 31, 2020 through the current tax year. At this time, management does not believe that the outcome of any future or current examination will have a material impact on our consolidated financial statements. We believe that we have an adequate provision for any adjustments that may result from tax examinations. However, the outcome of tax examinations cannot be predicted with certainty. Given the numerous tax years and matters that remain subject to examination in various tax jurisdictions, the ultimate resolution of current and future tax examinations could be inconsistent with management’s current expectations. If that were to occur, it could have an impact on our effective tax rate in the period in which such examinations are resolved.
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| U.S. federal foreign tax credits expiration | The U.S. federal foreign tax credits will begin to expire in 2031 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
NET INCOME PER SHARE |
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| Earnings Per Share [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| NET INCOME PER SHARE | 6. NET INCOME (LOSS) PER SHARE The following table presents the calculation of basic and diluted net income (loss) per share:
Potentially dilutive shares whose effect would have been antidilutive are excluded from the computation of diluted net income per share. The number of shares excluded was not material for 2025, 2024, and 2023.
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GOODWILL AND OTHER INTANGIBLE ASSETS |
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| Goodwill and Intangible Assets Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| GOODWILL AND OTHER INTANGIBLE ASSETS | 7. GOODWILL AND OTHER INTANGIBLE ASSETS The goodwill balances as of October 31, 2025, 2024, and 2023 and the movements in 2025 and 2024 for each of our reportable segments were as follows:
There were no impairments of goodwill during the years ended October 31, 2025, 2024, and 2023. As of October 31, 2025, 2024, and 2023, accumulated impairment losses on goodwill were $709 million as recorded within the CSG reportable segment. Other intangible assets as of October 31, 2025 and 2024 consisted of the following:
In 2025, we recognized additions to goodwill and other intangible assets of $1,001 million and $821 million, respectively, based on the preliminary allocation of the purchase price to the estimated fair values of the assets acquired and liabilities assumed from the acquisitions of Spirent, OSG, and other acquisition activity. See Note 2, “Acquisitions,” for additional information. During the year ended October 31, 2025, we transferred $33 million from in-process R&D to developed technology as projects were successfully completed. In 2024, we recognized additions to goodwill and other intangible assets of $738 million and $582 million, respectively, based on the allocation of the purchase price to the estimated fair values of the assets acquired and liabilities assumed from the acquisition of ESI Group and other acquisition activity. See Note 2, “Acquisitions,” for additional information. During the year ended October 31, 2025, other intangible assets increased $13 million due to foreign exchange translation impact. Amortization of other intangible assets was $137 million in 2025, $138 million in 2024, and $90 million in 2023. Estimated future amortization expense for our intangible assets as of October 31, 2025 is as follows:
Goodwill is assessed for impairment on a reporting unit basis, which is an operating segment or one level below an operating segment. We determine fair values for each of the reporting units using the market approach, when available and appropriate, or the income approach, or a combination of both. If multiple valuation methodologies are used, the results are weighted appropriately. Valuations using the market approach are derived from metrics of publicly traded comparable companies. The selections of comparable businesses are based on the markets in which our reporting units operate, giving consideration to risk profiles, size, geography, and diversity of products and services. Under the income approach, fair value is determined based on the present value of estimated future cash flows, discounted at an appropriate risk-adjusted rate. We use our internal forecasts to estimate future cash flows and include an estimate of long-term future growth rates based on our most recent views of the long-term outlook for each business. During the fourth quarter of 2025, we performed our annual impairment test of goodwill for all our reporting units using a qualitative approach. Based on the results of our qualitative testing, we believe that it is more likely than not that the fair value of each reporting unit is greater than its respective carrying value. As of October 31, 2025, we determined that no goodwill impairment exists and that the remaining goodwill is recoverable for all of our reporting units; however, there can be no assurance that goodwill will not be impaired in future periods. Estimating the fair value of reporting units requires the use of estimates and significant judgments that are based on a number of factors including actual operating results. It is possible that the judgments and estimates described above could change in future periods. Other intangible assets with finite lives are assessed for impairment whenever events or changes in business circumstances indicate that the carrying amount of the assets may not be fully recoverable or that the useful lives of these assets are no longer appropriate. No impairments of amortizable intangible assets were recorded during the years ended October 31, 2025, 2024, and 2023. The authoritative accounting guidance allows a qualitative approach for testing indefinite-lived intangible assets for impairment, similar to the impairment testing guidance for goodwill. It allows the option to first assess qualitative factors (events and circumstances) that could have affected the significant inputs used in determining the fair value of the indefinite-lived intangible asset. The qualitative factors assist in determining whether it is more likely than not that the indefinite-lived intangible asset is impaired. An organization may choose to bypass the qualitative assessment for any indefinite-lived intangible asset in any period and proceed directly to calculating its fair value. Our indefinite-lived intangible assets are generally in-process research and development (“IPR&D”) intangible assets. No impairments of indefinite-lived intangible assets were recorded in 2025 and 2024. We had no IPR&D intangible assets as of October 31, 2023. We review long-lived assets for impairment whenever events or changes in business circumstances indicate that the carrying amount of the assets may not be fully recoverable or that the useful lives of these assets are no longer appropriate.
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FAIR VALUE MEASUREMENTS |
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| Fair Value Disclosures [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| FAIR VALUE MEASUREMENTS | 8. FAIR VALUE MEASUREMENTS The authoritative guidance defines fair value as the price that would be received from selling an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. When determining the fair value measurements for assets and liabilities required or permitted to be recorded at fair value, we consider the principal or most advantageous market and assumptions that market participants would use when pricing the asset or liability. Fair Value Hierarchy The guidance establishes a fair value hierarchy that prioritizes inputs used in valuation techniques into three levels. A financial instrument’s categorization within the fair value hierarchy is based upon the lowest level of input that is significant to the fair value measurement. There are three levels of inputs that may be used to measure fair value: Level 1 — applies to assets or liabilities for which there are quoted prices in active markets for identical assets or liabilities. Level 2 — applies to assets or liabilities for which there are inputs other than quoted prices included within Level 1 that are observable, either directly or indirectly, for the asset or liability, such as quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in less active markets, or other inputs that can be derived principally from, or corroborated by, observable market data. Level 3 — applies to assets or liabilities for which there are unobservable inputs to the valuation methodology that are significant to the measurement of the fair value of the assets or liabilities. Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis Financial assets and liabilities measured at fair value on a recurring basis as of October 31, 2025 and 2024 were as follows:
Our money market funds and equity investments with readily determinable fair values are measured at fair value using quoted market prices and, therefore, are classified within Level 1 of the fair value hierarchy. Equity and fixed income investments, or convertible notes without readily determinable fair values that are either measured at cost, adjusted for observable changes in price or impairments, or accounted for under a measurement alternative, and company-owned life insurance contracts measured at cash surrender value are not categorized in the fair value hierarchy and are presented as “investments - other” in the table above. Our deferred compensation liability is classified as Level 2 because the inputs used in the calculations are observable, although the values are not directly based on quoted market prices. Our derivative financial instruments are classified within Level 2 as there is not an active market for each hedge contract, but the inputs used to calculate the value of the instruments are tied to active markets. Equity investments, including securities that are earmarked to pay the deferred compensation liability, are reported at fair value, with gains or losses resulting from changes in fair value recognized in earnings within “other income (expense), net” in the consolidated statement of operations. Certain derivative instruments are reported at fair value, with unrealized gains and losses, net of tax, included in “accumulated other comprehensive income (loss).” Realized gains and losses from the sale of investments are recorded in earnings. Net realized and unrealized gain on our equity and other investments was as follows:
Financial Assets and Liabilities Measured at Fair Value on a Non-Recurring Basis Assets measured at fair value on a non-recurring basis consisted of goodwill and intangible assets. See Note 7, “Goodwill and Other Intangible Assets,” for additional information. Goodwill Fair value assessments of the reporting unit and the reporting unit’s net assets, which are performed for goodwill impairment tests, are considered Level 3 measurements due to the significance of unobservable inputs developed using company-specific information. In the event of performing a quantitative impairment test, we consider a market approach as well as an income approach using the discounted cash flow model to determine the fair value of the reporting unit. Intangible Assets Fair value of intangible assets is considered Level 3 measurements due to the significance of unobservable inputs developed using company-specific information. In the event of performing a quantitative impairment test, we utilize an income approach for estimating the fair value of intangible assets. The future cash flows used in the analysis are based on internal cash flow projections based on our long-range plans and include significant assumptions by management.
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DERIVATIVES |
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| Derivative Instruments and Hedging Activities Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| DERIVATIVES | 9. DERIVATIVES We are exposed to foreign currency exchange rate fluctuations and interest rate changes in the normal course of our business. As part of our risk management strategy, we use derivative instruments, primarily forward contracts, to hedge economic and/or accounting exposures resulting from changes in foreign currency exchange rates. Cash Flow Hedges We enter into foreign exchange contracts to hedge our forecasted operational cash flow exposures resulting from changes in foreign currency exchange rates. These foreign exchange contracts, carried at fair value, have maturities based on a rolling period of up to twelve months. These derivative instruments are designated and qualify as cash flow hedges under the criteria prescribed in the authoritative guidance. The changes in the value of the derivative instrument included in the assessment of effectiveness are recognized in accumulated other comprehensive income and reclassified into earnings, when the forecasted transaction occurs, in the same financial statement line item in the consolidated statement of operations where the earnings effect of the hedged item is presented. If it becomes probable that the forecasted transaction will not occur, the hedge relationship will be de-designated and amounts accumulated in other comprehensive income will be reclassified into earnings in the current period. Gains and losses on the derivative instrument representing hedge components excluded from the assessment of effectiveness are amortized to earnings on a straight-line basis over the tenor of the hedge and are presented in the same financial statement line of the consolidated statement of operations where the earnings effect of the hedged item is presented. In 2020, we entered into forward-starting interest rate swaps with an aggregate notional amount of $600 million in connection with future interest payments on the issuance of $600 million in unsecured senior notes (“2034 Senior Notes”). The contract term allowed us to lock in a treasury rate on anticipated debt issuances. These derivative instruments were designated and qualified as cash flow hedges. The changes in fair value of these derivative instruments were recognized in “accumulated other comprehensive income (loss).” In 2023, we terminated the interest rate swap agreements, resulting in a deferred gain of $107 million recognized in “accumulated other comprehensive income (loss)” that is being amortized to interest expense over the term of the 2034 Senior Notes. The remaining gain to be amortized related to the interest rate swap agreements was $95 million as of October 31, 2025. Other Hedges Additionally, we enter into foreign exchange contracts to hedge monetary assets and liabilities that are denominated in currencies other than the functional currency of our subsidiaries. These foreign exchange contracts are carried at fair value and do not qualify for hedge accounting treatment and are not designated as hedging instruments. Changes in value of the derivative are recognized in “other income (expense), net” in the consolidated statement of operations in the current period along with the offsetting foreign currency gain or loss on the underlying assets or liabilities. In connection with the acquisition of Spirent, we entered into foreign exchange forward contracts to mitigate the currency exchange risk associated with the payment of the purchase price in pounds sterling. The aggregate notional amount of the currencies hedged was 1.2 billion pounds sterling. These foreign exchange contracts did not qualify for hedge accounting treatment and were not designated as hedging instruments. During the year ended October 31, 2025, the settlement of these contracts provided $74 million in cash, resulting in a gain of $51 million recorded in “other income (expense), net” in the consolidated statement of operations. In connection with the acquisition of the ESI Group, we entered into foreign exchange forward contracts to mitigate the currency exchange risk associated with the payment of the purchase price in euros. The aggregate notional amount of the currencies hedged was 930 million euros as of October 31, 2023. These foreign exchange contracts did not qualify for hedge accounting treatment and were not designated as hedging instruments. During the year ended October 31, 2024, these foreign exchange forward contracts were settled using existing cash of $63 million, resulting in a loss of $18 million recorded in “other income (expense), net” in the consolidated statement of operations. Our use of derivative instruments exposes us to credit risk to the extent that the counterparties may be unable to meet the terms of the agreement. We do, however, seek to mitigate such risks by limiting our counterparties to major financial institutions, which are selected based on their credit ratings and other factors. We have established policies and procedures for mitigating credit risk that include establishing counterparty credit limits, monitoring credit exposures, and continually assessing the creditworthiness of counterparties. The number of open foreign exchange forward contracts designated as “cash flow hedges” and “not designated as hedging instruments” was 195 and 79, respectively, as of October 31, 2025. The aggregated notional amounts by currency and designation as of October 31, 2025 were as follows:
Derivative instruments are subject to master netting arrangements and are disclosed at their gross fair value in the consolidated balance sheet. The gross fair values and balance sheet presentation of derivative instruments held as of October 31, 2025 and 2024 were as follows:
The effect of derivative instruments for foreign exchange contracts designated as hedging instruments and not designated as hedging instruments in our consolidated statement of operations was as follows:
The estimated amount at October 31, 2025 expected to be reclassified from accumulated other comprehensive income (loss) to earnings within the next twelve months is a gain of $17 million.
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LEASES (Notes) |
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| Leases [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Lessee, Operating Leases [Text Block] | 10. LEASES We have operating leases for items including office space, manufacturing and production locations, sales and service centers, research and development facilities, and certain equipment, primarily automobiles. Our leases have remaining terms of up to 13 years, which represent the non-cancellable periods of the leases and include extension options that are reasonably certain to be exercised. The weighted average lease term of our operating leases was 6.5 years, 7.0 years, and 7.8 years as of October 31, 2025, 2024, and 2023, respectively. The weighted average discount rate of our operating leases was 4 percent as of October 31, 2025 and 3 percent in 2024 and 2023. The following table summarizes the components of our lease cost:
Sublease income and finance lease costs were immaterial for the years ended October 31, 2025, 2024, and 2023. Supplemental information related to our operating leases was as follows:
The maturities of our operating leases as of October 31, 2025 with initial terms exceeding one year were as follows:
As of October 31, 2025, we did not have material leases that have not yet commenced. Rental income from the lease of excess facilities was $10 million for the years ended October 31, 2025, 2024, and 2023. It is included in “other operating expense (income), net.” Other lessor arrangements were immaterial.
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DEBT |
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| Debt Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| DEBT | 11. DEBT The following table summarizes the components of our debt:
Senior Notes 2027 Senior Notes In April 2017, the company issued an aggregate principal amount of $700 million in unsecured senior notes (“2027 Senior Notes”). The 2027 Senior Notes were issued at 99.873 percent of their principal amount. The notes will mature on April 6, 2027 and bear interest at a fixed rate of 4.60 percent per annum. The interest is payable semi-annually on April 6 and October 6, commencing on October 6, 2017. We incurred issuance costs of $6 million in connection with the 2027 Senior Notes that, along with the debt discount, are being amortized to interest expense over the term of the senior notes. 2029 Senior Notes In October 2019, the company issued an aggregate principal amount of $500 million in unsecured senior notes (“2029 Senior Notes”). The 2029 Senior Notes were issued at 99.914 percent of their principal amount. The notes will mature on October 30, 2029 and bear interest at a fixed rate of 3.00 percent per annum. The interest is payable semi-annually on April 30 and October 30, commencing on April 30, 2020. We incurred issuance costs of $4 million in connection with the 2029 Senior Notes that, along with the debt discount, are being amortized to interest expense over the term of the senior notes. 2030 Senior Notes In April 2025, the company issued an aggregate principal amount of $750 million in unsecured senior notes (“2030 Senior Notes”). The 2030 Senior Notes were issued at 99.760 percent of their principal amount. The notes will mature on July 30, 2030 and bear interest at a fixed rate of 5.35 percent per annum. The interest is payable semi-annually on January 30 and July 30, commencing on January 30, 2026. We incurred issuance costs of $7 million in connection with the 2030 Senior Notes that, along with the debt discount, are being amortized to interest expense over the term of the senior notes. 2034 Senior Notes In October 2024, the company issued an aggregate principal amount of $600 million in unsecured senior notes (“2034 Senior Notes”). The 2034 Senior Notes were issued at 99.897 percent of their principal amount. The notes will mature on October 15, 2034 and bear interest at a fixed rate of 4.95 percent per annum. The interest is payable semi-annually on April 15 and October 15, commencing on April 15, 2025. We incurred issuance costs of $6 million in connection with the 2034 Senior Notes that, along with the debt discount, are being amortized to interest expense over the term of the senior notes. The above senior notes are unsecured and rank equally in right of payment with all of our other senior unsecured indebtedness. We were in compliance with the covenants of our senior notes during the year ended October 31, 2025. The fair value of our debt, calculated from quoted prices that are Level 1 inputs under the accounting guidance fair value hierarchy, is approximately $2,565 million and $1,739 million as of October 31, 2025 and 2024, respectively. Revolving Credit Facility On July 30, 2021, we entered into an amended and restated credit agreement (the “Revolving Credit Facility”), which provided a $750 million five-year unsecured revolving credit facility that expires on July 30, 2026. Borrowings under the facility bear an annual interest rate of SOFR + 1.1 percent, including a facility fee of 0.1 percent per annum. In addition, the Revolving Credit Facility permits the company, subject to certain customary conditions, on one or more occasions to request to increase the total commitments under the Revolving Credit Facility by up to $250 million in the aggregate. We may use amounts borrowed under the Revolving Credit Facility for general corporate purposes. As of October 31, 2025 and 2024, we had no borrowings outstanding under the Revolving Credit Facility. We were in compliance with the covenants of the Revolving Credit Facility during the year ended October 31, 2025. Bridge Facility On March 28, 2024, we entered into a bridge credit agreement (the “Bridge Facility”) pursuant to which certain lenders agreed to provide a senior unsecured bridge credit facility of up to 1,350 million pounds sterling for the purpose of providing the financing to support a planned acquisition. On July 25, 2024, the Bridge Facility decreased to 1,232 million pounds sterling. On May 8, 2025, the Bridge Facility further decreased to 752 million pounds sterling and on September 25, 2025 the Bridge Facility was terminated. We incurred costs in connection with the Bridge Facility of $7 million that have been fully amortized to interest expense. Letters of Credit As of October 31, 2025 and 2024, we had $60 million and $43 million, respectively, of outstanding standby letters of credit, custom bonds, and surety bonds.
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RETIREMENT PLANS AND POST RETIREMENT PENSION PLANS |
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| Retirement Benefits [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| RETIREMENT PLANS AND POST-RETIREMENT PENSION PLANS | 12. RETIREMENT PLANS AND POST-RETIREMENT BENEFIT PLANS General. The majority of our employees are covered under various defined benefit and/or defined contribution retirement plans. Additionally, we sponsor post-retirement health care benefits for our eligible U.S. employees. We provide U.S. employees who meet eligibility criteria under the Keysight Technologies, Inc. Retirement Plan (“RP”), defined benefits that are based on an employee’s base or target pay during the years of employment and length of service. For eligible employees’ service through October 31, 1993, the defined benefit payable under the RP is reduced by any amounts due to the eligible employees’ service under our defined contribution Deferred Profit-Sharing Plan (“DPSP”), which was closed to new participants as of November 1993. The obligations under the DPSP equal the fair value of the DPSP assets, which was $146 million as of October 31, 2025. Employees hired on or after August 1, 2015 are not eligible to participate in the RP or the Keysight Technologies, Inc. Health Plan for Retirees (“U.S. Post-Retirement Benefit Plan”). In addition, in the U.S. we maintain the Supplemental Benefits Retirement Plan (“SBRP”), a supplemental unfunded non-qualified defined benefit plan to provide benefits that would be provided under the RP but for limitations imposed by the Internal Revenue Code. The RP and the SBRP comprise the “U.S. Plans.” Eligible employees outside the U.S. generally receive retirement benefits under various retirement plans (“Non-U.S. Plans”) based on factors such as years of service and/or employee compensation levels. Eligibility is generally determined in accordance with local statutory requirements. Certain of our immaterial Non-U.S. defined benefit plans are not included in these disclosures. 401(k) defined contribution plan. Eligible U.S. employees may participate in the Keysight Technologies, Inc. 401(k) Plan (the “401(k) Plan”). Enrollment in the 401(k) Plan is automatic for employees who meet eligibility requirements unless they decline participation. We provide matching contributions of up to 4 percent of annual eligible compensation for employees hired prior to August 1, 2015 and up to 6 percent for employees hired thereafter. The 401(k) Plan employer expense included in income from operations was $34 million in 2025, $33 million in 2024, and $34 million in 2023. Post-retirement medical benefit plans. In addition to receiving retirement benefits, U.S. employees who meet eligibility requirements as of their termination date may participate in the U.S. Post-Retirement Benefit Plan. Components of net periodic benefit cost. We record the service cost component of net periodic benefit cost (benefit) in the same line item as other employee compensation costs. We record the non-service cost components of net periodic benefit cost (benefit), such as interest cost, expected return on assets, amortization of prior service cost, and actuarial gains or losses, within “other income (expense), net” in the consolidated statement of operations. The company uses alternate methods of amortization, as allowed by the authoritative guidance, which amortizes the actuarial gains and losses on a consistent basis for the years presented. For the U.S. Plans, gains and losses are amortized over the average future working lifetime of active plan participants. For most Non-U.S. Plans and the U.S. Post-Retirement Benefit Plan, gains and losses are amortized using a separate layer for each year’s gains and losses. For the years ended October 31, 2025, 2024, and 2023, components of net periodic benefit cost (benefit) and other amounts recognized in other comprehensive income consisted of:
Funded status. As of October 31, 2025 and 2024, the funded status of the defined benefit and post-retirement benefit plans was as follows:
The change in the benefit obligation for the U.S. defined benefit plans for 2025 was primarily driven by actuarial losses from changes in demographic assumptions, partially offset by gains due to plan experience, and 2024 was primarily driven by changes in discount rates. The change in the benefit obligation for the non-U.S. defined benefit plans for 2025 was primarily driven by currency losses, partially offset by changes in discount rates, and 2024 was primarily driven by changes in discount rates. The change in benefit obligations for the U.S. post-retirement benefit plan for 2025 was primarily driven by changes in anticipated future utilization of reimbursement benefit, partially offset by changes in discount rates, and 2024 was primarily driven by changes in discount and retiree mortality rates. Investment policies and strategies as of October 31, 2025. In the U.S., our RP target asset allocations are approximately 60 percent growth funds, primarily equities, and approximately 40 percent fixed income investments and in the U.S. Post-Retirement Benefit Plan, target asset allocations are approximately 70 percent growth funds, primarily equities, and approximately 30 percent fixed income investments. Our DPSP target asset allocation is approximately 60 percent growth funds, primarily equities, and approximately 40 percent fixed income investments. The general investment objective for all our plan assets is to obtain the optimum rate of investment return on the total investment portfolio consistent with the assumed level of risk. Specific investment objectives for the plans’ portfolios are to maintain and enhance the purchasing power of the plans’ assets; achieve investment returns consistent with the level of risk being taken; and earn performance rates of return in accordance with the benchmarks adopted for each asset class. Outside of the U.S., other than for the U.K. defined benefit plan, our target asset allocation is from 41 to 70 percent equities, from 30 to 54 percent fixed income investments, and from zero to 5 percent cash. The target asset allocation for the U.K. plan is 100 percent insurance contracts. All plans’ assets are broadly diversified. Due to fluctuations in capital markets, our actual allocation of plan assets as of October 31, 2025 may differ from the target allocation. Our policy is to periodically bring the actual allocation in line with the target allocation. Equity securities include exchange-traded common stock and preferred stock of companies from broadly diversified industries. Fixed income securities include a portfolio of corporate bonds of companies from diversified industries, government securities, mortgage-backed securities, asset-backed securities, derivative instruments and other. Portions of the cash and cash equivalent, equity, and fixed income investments are held in commingled funds. Investments in commingled funds are valued using the net asset value (“NAV”) method as a practical expedient. Investments valued using the NAV method are allocated across a broad array of funds and diversify the portfolio. The value of the plan assets directly affects the funded status of our pension and post-retirement benefit plans recorded in the financial statements. In March 2021, we entered into an insurance buy-in contract for a portion of benefit obligations under the U.K. defined benefit plan and classified it as “other investments.” In December 2021, we completed the second phase of the same contract. In June 2025, we completed the third and final phase of the same contract. The insurance buy-in contract is similar to an annuity contract, which matches cash flows with future benefit payments for a specific group of pensioners with the obligation remaining with the plan. This contract is issued by a third-party insurance company with no affiliation to us. The insurance contract is valued on an insurer pricing basis, which reflects the purchase price adjusted for changes in discount rates and other actuarial assumptions, which approximates fair value. Fair Value. The measurement of the fair value of pension and post-retirement plan assets uses the valuation methodologies and the inputs as described in Note 8, “Fair Value Measurements.” Cash and Cash Equivalents - Cash and cash equivalents consist of short-term investment funds that are invested in short-term domestic fixed income securities and other securities with debt-like characteristics, emphasizing short-term maturities and quality. Cash and cash equivalents are generally classified as Level 2 investments except when the cash and cash equivalents are held in commingled funds, which have a daily NAV derived from quoted prices for the underlying securities in active markets; these are classified as assets measured at NAV. Equity - Some equity securities consisting of common and preferred stock are held in commingled funds, which have daily NAVs derived from quoted prices for the underlying securities in active markets; these are classified as assets measured at NAV. Commingled funds that have quoted prices in active markets are classified as Level 1 investments. Equity also includes some growth-seeking real estate commingled funds that are measured at NAV. Fixed Income - Some fixed income securities are held in commingled funds that have daily NAVs derived from the underlying securities; these are classified as assets measured at NAV. Commingled funds that have quoted prices in active markets are classified as Level 1 investments. Some fixed income securities that are not actively traded and are valued basis inputs, such as quoted price of similar securities, or other inputs that can be derived principally from or corroborated by observable market data are classified as Level 2 investments. Other Investments - Other investments represents the U.K. insurance buy-in contract and is classified as a Level 3 investment. Insurance contracts are generally classified as Level 3 investments. The following tables present the fair value of U.S. Defined Benefit Plans assets classified under the appropriate level of the fair value hierarchy as of October 31, 2025 and 2024:
(a) Certain instruments that are measured at fair value using the NAV per share practical expedient have not been categorized in the fair value hierarchy. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the total value of plan assets. For U.S. Defined Benefit Plans, there was no activity relating to assets measured at fair value using significant unobservable inputs (Level 3) during 2025 and 2024. The following tables present the fair value of U.S. Post-Retirement Benefit Plan assets classified under the appropriate level of the fair value hierarchy as of October 31, 2025 and 2024:
(a) Certain instruments that are measured at fair value using the NAV per share practical expedient have not been categorized in the fair value hierarchy. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the total value of plan assets. For the U.S. Post-Retirement Benefit Plan, there was no activity relating to assets measured at fair value using significant unobservable inputs (Level 3) during 2025 and 2024. The following tables present the fair value of Non-U.S. Defined Benefit Plans assets classified under the appropriate level of the fair value hierarchy as of October 31, 2025 and 2024:
(a) Certain instruments that are measured at fair value using the NAV per share practical expedient have not been categorized in the fair value hierarchy. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the total value of plan assets. For Non-U.S. Defined Benefit Plans assets measured at fair value using significant unobservable inputs (Level 3), the following table summarizes the change in balances during 2025 and 2024:
The table below presents the combined projected benefit obligation (“PBO”), accumulated benefit obligation (“ABO”) and fair value of plan assets, grouping plans using comparisons of the PBO and ABO relative to the plan assets as of October 31, 2025 and 2024:
Contributions and estimated future benefit payments. For 2026, we do not expect to contribute to our U.S. Defined Benefit Plans or U.S. Post-Retirement Benefit Plan, and we expect to contribute $14 million to our Non-U.S. Defined Benefit Plans. The following table presents expected future benefit payments for the next 10 years.
Assumptions. The assumptions used to determine the benefit obligations and net periodic benefit cost (benefit) for our defined benefit and post-retirement benefit plans are presented in the tables below. The expected long-term return on assets below represents an estimate of long-term returns on investment portfolios, consisting of a mixture of equities, fixed income and other investments, in proportion to the asset allocations of each of our plans. We consider long-term rates of return, which are weighted based on the asset classes (both historical and forecasted) in which we expect our pension and post-retirement funds to be invested. Discount rates reflect the current rate at which pension and post-retirement obligations could be settled based on the measurement dates of the plans, which is October 31. The U.S. discount rates as of October 31, 2025 and 2024 were determined based on the results of matching expected plan benefit payments with cash flows from a hypothetically constructed bond portfolio. The Non-U.S. discount rates as of October 31, 2025 and 2024 were determined based on a granular approach, which discounts the expected plan benefit payments with rates from a high-quality corporate bond yield curve. In addition, we used this method to calculate two components of the periodic benefit cost: service cost and interest cost. The range of assumptions that were used for the Non-U.S. Defined Benefit Plans reflects the different economic environments within various countries. Assumptions used to calculate the net periodic benefit cost (benefit) were as follows:
Assumptions used to calculate the benefit obligation as of October 31, 2025 and 2024 were as follows:
Health care trend rates did not have a significant effect on the total service and interest cost components or on the post-retirement benefit obligation amounts reported for the U.S. Post-Retirement Benefit Plan for the years ended October 31, 2025 and 2024.
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SUPPLEMENTAL FINANCIAL INFORMATION |
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| Disclosure Text Block [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Additional Financial Information Disclosure | 13. SUPPLEMENTAL FINANCIAL INFORMATION The following tables provide details of selected balance sheet items: Cash, cash equivalents, and restricted cash
Restricted cash primarily relates to deficit reduction contributions to an escrow account for one of our non-U.S. defined benefit pension plans and deposits held as collateral against bank guarantees. Inventory
Inventory-related excess and obsolescence charges recorded in “cost of products” were $43 million in 2025, $35 million in 2024, and $27 million in 2023. We record excess and obsolete inventory charges for inventory at our sites and at our contract manufacturers and suppliers, where we have non-cancellable purchase commitments. Property, plant and equipment
Asset impairments were zero in 2025, 2024, and 2023. Depreciation expense was $131 million in 2025, $126 million in 2024, and $120 million in 2023. Standard warranty Activity related to the standard warranty accrual, which is included in “other accrued liabilities” and “other long-term liabilities” in our consolidated balance sheet, is as follows:
Other current assets
Prepaid assets include deposits paid in advance to contract manufacturers of $176 million and $200 million as of October 31, 2025 and 2024, respectively. The tax receivables in 2024 includes a one-time discrete tax benefit. See Note 5, “Income Taxes,” for additional information. Other assets
The tax receivables in 2025 and 2024 includes a one-time discrete tax benefit. See Note 5, “Income Taxes,” for additional information.
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COMMITMENTS AND CONTINGENCIES |
12 Months Ended |
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Oct. 31, 2025 | |
| Commitments and Contingencies Disclosure [Abstract] | |
| COMMITMENTS AND CONTINGENCIES | 14. COMMITMENTS AND CONTINGENCIES Commitments to contract manufacturers and suppliers. We purchase components from a variety of suppliers and use several contract manufacturers to provide manufacturing services for our products. During the normal course of business, we enter into agreements with contract manufacturers and suppliers that allow them to procure inventory based on mutually agreed criteria. As of October 31, 2025, our non-cancellable purchase commitments were approximately $450 million. We expect to fulfill most of our purchase commitments for inventory within one year. Other purchase commitments. Other purchase commitments primarily relate to software as a service and other professional services contracts. As of October 31, 2025, our non-cancellable contractual obligations related to these contracts were approximately $111 million, most of which are expected to be fulfilled within two years. We also have long-term power purchase agreements to purchase power at predominantly variable prices. These agreements are expected to support our power consumption needs with more favorable pricing and reliability than our previous supply agreements. Litigation and contingencies. On January 1, 2022, Centripetal Networks filed a lawsuit in Federal District Court in Virginia, alleging that certain Keysight products infringe certain of Centripetal’s patents. We challenged the validity of claims of eight of these patents at the U.S. Patent and Trademark Office, with all or most claims being found invalid in each patent. Centripetal is appealing seven of these results. In addition, in February 2022, Centripetal filed complaints in Germany alleging infringement of three of Centripetal’s German patents. Keysight challenged the validity of the claims of these patents in German nullity or European Patent Office (“EPO”) opposition procedures. Two of the three patents were invalidated, and the appeals process has ended. The third patent had all but one claim invalidated at trial and is under appeal. In April 2022, Centripetal filed a complaint with the International Trade Commission (“ITC”) requesting that they investigate whether Keysight violated Section 337 of the Tariff Act (“Section 337”) and should be enjoined from importing certain products that are manufactured outside of the U.S. and which are alleged to infringe Centripetal patents. On December 5, 2023, the ITC issued its Notice of Determination that Keysight did not unfairly import products in violation of Section 337 and the investigation was terminated. Centripetal has appealed this determination. The lawsuit in Federal District Court in Virginia is stayed pending the finalization of appeals of the ITC findings and validity challenges. On August 21, 2024, Keysight was served in Germany with a complaint filed in the Unified Patent Court alleging that certain Keysight products sold in Germany, France, Italy and the Netherlands infringe a European Centripetal patent. In December 2025, the court issued its written determination that Keysight did not infringe the patent. Keysight also challenged the validity of the patent using EPO opposition procedures, and the EPO revoked the patent in its hearing in November 2025. We deny the allegations and are aggressively defending each case. On June 14, 2019, the U.S. Treasury issued final regulations relating to GILTI under the tax regulations. The tax regulations contained language which disallowed GILTI tax deductions for intangible asset amortization resulting from the Singapore restructuring completed in 2018. During the third quarter of fiscal year 2024, we concluded, in response to recent U.S. Supreme Court decisions on a number of relevant cases, the evolving global tax landscape and other changes in circumstances, that Treasury exceeded its regulatory authority and the intangible asset amortization should be deductible. In response, we amended our U.S. federal income tax returns for the open tax years to claim the deduction and recognized the discrete benefit in the consolidated financial statements. We believe the position meets the more likely than not recognition threshold. On January 23, 2025, we filed a lawsuit against the United States of America in the United States Court of Federal Claims seeking a tax refund of $107 million, or such greater amount allowed by law, plus any other amount, including interest and cost, allowed by law. We intend to vigorously defend our position. The outcome cannot be predicted with certainty. If we are ultimately unsuccessful in defending our refund claim, we will be required to reverse the benefit previously recorded, most likely resulting in a material increase in the effective tax rate and income tax liability. Although there are no matters pending that we currently believe are probable and reasonably possible of having a material impact to our business, consolidated financial position, results of operations, or cash flows, the outcome of litigation is inherently uncertain and is difficult to predict. An adverse outcome in any outstanding lawsuit or proceeding could result in significant monetary damages or injunctive relief. If adverse results are above management’s expectations or are unforeseen, management may not have accrued for the liability, which could impact our results in future periods. We are also involved in lawsuits, claims, investigations and proceedings, including, but not limited to, patent, employment, commercial and environmental matters, which arise in the ordinary course of business. Indemnification Obligations Related to Transactions In connection with acquisitions, divestitures, mergers, spin-offs and other transactions, we have agreed to indemnify certain parties for future damages, losses, expenses and liabilities that were incurred prior to or are related to such transactions. The liabilities covered by these indemnifications include, but are not limited to, tax, employment, benefits, intellectual property, environmental, and other liabilities. We do not believe that our indemnification obligations related to such liabilities were material as of October 31, 2025. Indemnifications to Officers and Directors Our corporate by-laws require that we indemnify our officers and directors, as well as those who act as directors and officers of other entities at our request, against expenses, judgments, fines, settlements, and other amounts actually and reasonably incurred in connection with any proceedings arising out of their services to Keysight and such other entities, including service with respect to employee benefit plans. In addition, we have entered into separate indemnification agreements with each director and each board-appointed officer of Keysight that provide for indemnification under similar and additional circumstances. The indemnification obligations are more fully described in our corporate by-laws and the indemnification agreements, which are available on our website. We purchase standard insurance to cover claims or a portion of the claims made against our directors and officers. Since a maximum obligation is not explicitly stated in our by-laws or in our indemnification agreements and will depend on the facts and circumstances that arise out of any future claims, the overall maximum amount of the obligations cannot be reasonably estimated. We have not historically made payments related to these obligations, and do not believe that our indemnification obligations related to such claims were material as of October 31, 2025. Other Indemnifications As is customary in our industry and as provided for in local law in the U.S. and other jurisdictions, many of our standard contracts provide remedies to our customers and others with whom we enter into contracts, such as defense, settlement, or payment of judgment for intellectual property claims related to the use of our products. From time to time we indemnify customers, as well as our suppliers, contractors, lessors, lessees, companies that purchase our businesses or assets and others with whom we enter into contracts, against combinations of loss, expense, or liability arising from various triggering events related to the sale and the use of our products and services, the use of their goods and services, the use of facilities and state of our owned facilities, the state of the assets and businesses that we sell and other matters covered by such contracts, usually up to a specified maximum amount. In addition, from time to time we also provide protection to these parties against claims related to undiscovered liabilities, additional product liability or environmental obligations. In our experience, claims made under such indemnifications are rare and we do not believe that our indemnification obligations related to such claims were material as of October 31, 2025.
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| Statement of Comprehensive Income [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| STOCKHOLDERS' EQUITY | 15. STOCKHOLDERS' EQUITY Stock Repurchase Program On March 6, 2023, our board of directors approved a stock repurchase program authorizing the purchase of up to $1,500 million of the company’s common stock. On November 24, 2025, our board of directors approved a new stock repurchase program authorizing the purchase of up to $1,500 million of the company’s common stock, replacing the previously approved March 2023 program, under which $110 million remained as of October 31, 2025. Under our stock repurchase program, shares may be purchased from time to time, subject to general business and market conditions and other investment opportunities, through open market purchases, privately negotiated transactions, or other means. All such shares and related costs are held as treasury stock and accounted for at the trade date using the cost method. The stock repurchase program may be commenced, suspended, or discontinued at any time at the company’s discretion and does not have an expiration date. In 2025, we repurchased 2,389,253 shares of common stock for $375 million. Additionally, we accrued $2 million related to excise tax levied on share repurchases, net of issuances. In 2024, we repurchased 2,974,967 shares of common stock for $439 million and accrued $3 million related to excise tax levied on share repurchases, net of issuances. In 2023, we repurchased 4,913,548 shares of common stock for $702 million and accrued $4 million related to excise tax levied on share repurchases, net of issuances. Accumulated other comprehensive loss The following table summarizes the components of accumulated other comprehensive loss, net of tax effect:
Changes in accumulated other comprehensive loss by component and related tax effects were as follows:
Reclassifications out of accumulated other comprehensive loss into earnings were as follows:
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SEGMENT INFORMATION |
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| Segment Reporting [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| SEGMENT INFORMATION | 16. SEGMENT INFORMATION Our operating segments were determined based primarily on how the Chief Operating Decision Maker (“CODM”), , views and evaluates our operations. Other factors, including market separation and customer specific applications, go-to-market channels, products and services, and manufacturing are considered in determining the formation of these operating segments. The CODM is regularly provided with and reviews segment revenues and segment income from operations to support decision-making, set strategic goals, allocate resources, and evaluate each segment’s progress against the company’s plan. The CODM also reviews and approves budgets, including capital expenditures, at the segment level. The segment results are not necessarily in conformity with GAAP and exclude items such as share-based compensation expense, amortization of acquisition-related balances, acquisition and integration costs, restructuring costs, interest income, interest expense, and other items. A significant portion of the segments’ expenses arise from allocated corporate charges, as well as expenses related to our centralized sales force, and service, marketing and technology functions that we have historically provided to the segments in order to realize economies of scale and to efficiently use resources. Corporate charges include legal, accounting, real estate, insurance services, information technology services, treasury, and other corporate infrastructure expenses. Segment allocations are determined on a basis that we consider to be a reasonable reflection of the utilization of services provided to, or benefits received by, the segments. Newly acquired businesses are not allocated these charges until integrated into our shared services and corporate infrastructure. Descriptions of our two reportable segments are as follows: The Communications Solutions Group (“CSG”) serves customers spanning the global commercial communications and aerospace, defense, and government end markets. The group’s solutions consist of electronic design and test software, instrumentation, systems, and related services. These solutions are used in the design, simulation, validation, manufacturing, installation, and optimization of communication systems in wireless, wireline (data center networking), enterprise, and aerospace, defense, and government end markets. Our recent acquisition of Spirent adds wireless network test and assurance and positioning technology solutions to our portfolio, complementing our design, validation, and performance offerings to deliver end-to-end solutions to our customers. The Electronic Industrial Solutions Group (“EISG”) serves customers across a diverse set of end markets focused on automotive and energy, semiconductor solutions, and general electronics. The group's solutions consist of electronic design, test and simulation software, instrumentation, systems, computer-aided engineering solutions, and related services. These solutions are used in the design, simulation, validation, manufacturing, installation, and optimization of electronic equipment. The following tables reflect the results of our reportable segments and significant segment expenses as defined above.
The following table reconciles reportable segments’ income from operations to our income before taxes as reported:
“Restructuring and other” includes legal expenses of $17 million and $23 million in 2024 and 2023, respectively. Major customers. No customer represented 10 percent or more of our total revenue in 2025, 2024, or 2023. The following table presents segment assets and capital expenditures directly managed by each segment.
The following table reconciles segment assets to our total assets:
Segment assets include goodwill and gross other intangible assets, accounts receivable, inventory, property, plant and equipment, and other assets. Unallocated assets primarily consist of cash and cash equivalents, deferred tax assets, long-term investments, accumulated amortization of other intangible assets, pension assets, and other assets. The increase in segment assets for the year ended October 31, 2025 was primarily due to additions in assets acquired as part of the 2025 acquisitions. See Note 2, “Acquisitions,” for additional information. The following tables present summarized information for revenue and long-lived assets by country. Revenues from external customers are generally attributed to countries based upon the customer's location. Long-lived assets consist of property, plant, and equipment, operating lease right-of-use assets, and other long-term assets, excluding intangible assets.
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SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS |
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| SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| VALUATION AND QUALIFYING ACCOUNTS | SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS
* Additions include current-year additions charged to expense and current-year build due to increases in net deferred tax assets, return to provision true-ups, purchase accounting, and Other Comprehensive Income (“OCI”) impact to deferred taxes. The increase in valuation allowance in 2025 as compared to 2024 relates to net operating losses in Luxembourg, capital losses, and net operating losses in the U.K. as well as California research credits from acquired entities that are subject to limitations in the amount that can be utilized in future years. ** Deductions include current-year releases credited to expense and current-year reductions due to decreases in net deferred tax assets, return to provision true-ups, other adjustments, and OCI impact to deferred taxes.
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Insider Trading Arrangements |
3 Months Ended |
|---|---|
Oct. 31, 2025 | |
| Trading Arrangements, by Individual | |
| Rule 10b5-1 Arrangement Adopted | false |
| Non-Rule 10b5-1 Arrangement Adopted | false |
| Rule 10b5-1 Arrangement Terminated | false |
| Non-Rule 10b5-1 Arrangement Terminated | false |
Insider Trading Policies and Procedures |
12 Months Ended |
|---|---|
Oct. 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 |
|---|---|
Oct. 31, 2025 | |
| Cybersecurity Risk Management, Strategy, and Governance [Line Items] | |
| Cybersecurity Risk Management Processes for Assessing, Identifying, and Managing Threats [Text Block] | Risk Management and Strategy Our overall information security program applies an enterprise-wide, risk-based approach to information security that enables us to assess, identify, and manage risk exposures, including material risks from cybersecurity threats, in a timely manner. Our information security operations and procedures provide a comprehensive Information Security Management System (“ISMS”) enabling us to maintain the confidentiality, integrity, and availability of information and systems in our environment. Our information security policies are based on National Institute of Standards and Technology Special Publication 800-171 framework and apply to the entire enterprise. We have a dedicated Information Security and Compliance organization (“ISC”) that owns and operates the ISMS. The ISC organization reports directly to Keysight’s Chief Information Security Officer (“CISO”) and includes functions such as information security policy management, risk management, vulnerability management, compliance assurance, identity and access management, incident management, security awareness and education, and information technology (“IT”) disaster recovery. Our management team has relevant expertise and experience in understanding risks from cybersecurity threats and overseeing risk management processes. Our CISO is an experienced cybersecurity senior executive with more than 25 years’ experience in building and leading cybersecurity, risk management, and information technology teams. Our cybersecurity risk management program includes: •Cybersecurity incident detection and response plan to prepare for, detect, respond to and recover from cybersecurity incidents, which include processes to triage, assess severity for, escalate, contain, investigate, and remediate the incident, as well as to comply with potentially applicable legal obligations and mitigate brand and reputational damage. •Risk Assessment: Our enterprise-wide risk management programs and Information Security Review process is designed to identify, assess, document, monitor, and report information security risks. Based on this information, we evaluate the likelihood and impact of harmful events and deliver recommendations regarding a response to risks presented. Feedback from internal audits, external assessments, and industry benchmarks is used to improve our cybersecurity posture. •Training and Awareness: Implementation of enterprise-wide mandatory annual security awareness training for employees, including cybersecurity and data privacy training. We regularly deploy enterprise-wide phishing simulation tests with mandatory follow-up training and education, which are reviewed at least annually and are updated as needed. Additionally, we provide an easy mechanism for employees to report suspicious email messages to the information security team for additional investigation. •Security Tools Optimization: Utilize a variety of tools designed to protect our network and systems, including firewalls, intrusion detection and prevention systems, web content filtering protection, anti-virus and malware detection tools, system scans and full disk encryption. •Third Party Risk: Keysight’s Third Party Cyber Risk Management is a systematic process for managing exposure to cybersecurity risks throughout the supply chain and developing appropriate response strategies, policies, processes, and procedures. In addition, Keysight maintains information security risk insurance, which may help to offset the costs of an information security breach. The policy is reviewed annually and updated as needed. We also engage with approved third-party companies that review our regulatory compliance, validate control performance, perform penetration testing, and provide impartial risk assessments. To date, we have not identified risks from cybersecurity threats or incidents, including as a result of any previous cybersecurity incidents, that have materially affected the company or are reasonably likely to materially affect our operations, business strategy, results of operations, or financial condition. For more information on how cybersecurity risk could materially affect the company’s business strategy, results of operations, or financial condition, please refer to “Item 1A. Risk Factors.”
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| Cybersecurity Risk Management Processes Integrated [Text Block] | Our overall information security program applies an enterprise-wide, risk-based approach to information security that enables us to assess, identify, and manage risk exposures, including material risks from cybersecurity threats, in a timely manner. Our information security operations and procedures provide a comprehensive Information Security Management System (“ISMS”) enabling us to maintain the confidentiality, integrity, and availability of information and systems in our environment. Our information security policies are based on National Institute of Standards and Technology Special Publication 800-171 framework and apply to the entire enterprise. We have a dedicated Information Security and Compliance organization (“ISC”) that owns and operates the ISMS. The ISC organization reports directly to Keysight’s Chief Information Security Officer (“CISO”) and includes functions such as information security policy management, risk management, vulnerability management, compliance assurance, identity and access management, incident management, security awareness and education, and information technology (“IT”) disaster recovery. Our management team has relevant expertise and experience in understanding risks from cybersecurity threats and overseeing risk management processes. Our CISO is an experienced cybersecurity senior executive with more than 25 years’ experience in building and leading cybersecurity, risk management, and information technology teams. Our cybersecurity risk management program includes: •Cybersecurity incident detection and response plan to prepare for, detect, respond to and recover from cybersecurity incidents, which include processes to triage, assess severity for, escalate, contain, investigate, and remediate the incident, as well as to comply with potentially applicable legal obligations and mitigate brand and reputational damage. •Risk Assessment: Our enterprise-wide risk management programs and Information Security Review process is designed to identify, assess, document, monitor, and report information security risks. Based on this information, we evaluate the likelihood and impact of harmful events and deliver recommendations regarding a response to risks presented. Feedback from internal audits, external assessments, and industry benchmarks is used to improve our cybersecurity posture. •Training and Awareness: Implementation of enterprise-wide mandatory annual security awareness training for employees, including cybersecurity and data privacy training. We regularly deploy enterprise-wide phishing simulation tests with mandatory follow-up training and education, which are reviewed at least annually and are updated as needed. Additionally, we provide an easy mechanism for employees to report suspicious email messages to the information security team for additional investigation. •Security Tools Optimization: Utilize a variety of tools designed to protect our network and systems, including firewalls, intrusion detection and prevention systems, web content filtering protection, anti-virus and malware detection tools, system scans and full disk encryption.
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| 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] | To date, we have not identified risks from cybersecurity threats or incidents, including as a result of any previous cybersecurity incidents, that have materially affected the company or are reasonably likely to materially affect our operations, business strategy, results of operations, or financial condition. For more information on how cybersecurity risk could materially affect the company’s business strategy, results of operations, or financial condition, please refer to “Item 1A. Risk Factors.”
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| Cybersecurity Risk Process for Informing Board Committee or Subcommittee Responsible for Oversight [Text Block] | Cybersecurity is an important part of our risk management processes and an area of focus for our Board and management. The Audit and Finance Committee, which is comprised entirely of independent directors with information security experience, oversees and monitors the company’s information security programs. Additionally, one of our independent directors has a CERT Certification in Cybersecurity Oversight from Carnegie Mellon University Software Engineering Institute. The Chief Information Officer (“CIO”) meets with the Audit and Finance Committee regularly to report on risks, mitigation, initiatives, compliance, and outcomes and the Audit and Finance Committee reports relevant information to the full Board.
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| Cybersecurity Risk Management Positions or Committees Responsible [Text Block] | The CISO is responsible for the ISMS and reports directly to the CIO. The CIO is the head of the company’s global IT team which has an integrated governance structure consisting of a Senior Executive Committee, a Cyber Executive Committee and Cyber Leaders. The Senior Executive Committee meets quarterly, prioritizes the information technology components of strategic business imperatives and oversees IT capability and security programs. The Cyber Executive Committee meets monthly, reviews identified risks, sponsors initiatives to address risk, and oversees security and compliance responses. Cyber Leaders are management representatives from all functions and lines of business who are responsible for executing programs and initiatives sponsored by the Senior Executive Committee.
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| Cybersecurity Risk Management Expertise of Management Responsible [Text Block] | Our management team has relevant expertise and experience in understanding risks from cybersecurity threats and overseeing risk management processes. Our CISO is an experienced cybersecurity senior executive with more than 25 years’ experience in building and leading cybersecurity, risk management, and information technology teams. |
OVERVIEW AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies) |
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| Accounting Policies [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Basis of Presentation and Significant Accounting Policies [Text Block] | Basis of Presentation. We have prepared the accompanying financial statements pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”) and in conformity with generally accepted accounting principles in the U.S. (“GAAP”). Our fiscal year end is October 31. Unless otherwise stated, all years and dates refer to our fiscal year. Management is responsible for the fair presentation of the accompanying consolidated financial statements, prepared in accordance with GAAP, and has full responsibility for their integrity and accuracy. In the opinion of management, the accompanying consolidated financial statements contain all normal and recurring adjustments necessary to present fairly our consolidated balance sheet, consolidated statement of operations, consolidated statement of comprehensive income, consolidated statement of cash flows, and consolidated statement of equity.
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| Principles of consolidation | Principles of consolidation. The consolidated financial statements include the accounts of the company and our wholly- and majority-owned subsidiaries. All significant inter-company transactions have been eliminated. There was no non-controlling interest for the years ended October 31, 2025 and 2023. The consolidated financial statements for the year ended October 31, 2024 reflect the impact of non-controlling interests. Non-controlling interests did not have a significant impact on the consolidated results of operations; therefore, net income attributable to non-controlling interests for the year ended October 31, 2024 of $4 million is not presented separately and is included in “other income (expense), net” in the consolidated statements of operations. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Use of estimates | Use of Estimates. The preparation of financial statements in accordance with GAAP requires management to make estimates and assumptions that affect the amounts reported in our consolidated financial statements and accompanying notes. Management bases its estimates on historical experience and various other assumptions believed to be reasonable. Although these estimates are based on management's knowledge of current events and actions that may impact the company in the future, actual results may be different from the estimates. We are not aware of any specific event or circumstance that would require an update to our estimates or judgments or a revision of the carrying value of our assets or liabilities as of October 31, 2025. Our critical accounting policies are those that affect our financial statements materially and involve difficult, subjective or complex judgments by management. Those policies are revenue recognition, inventory valuation, share-based compensation, retirement and post-retirement plan assumptions, business combinations, valuation of goodwill and other intangible assets, warranty, loss contingencies, restructuring, and accounting for income taxes.
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| Revenue recognition | Revenue recognition. Revenue is recognized upon transfer of control of the promised products or services to customers in an amount that reflects the consideration we expect to receive in exchange for those products or services. We primarily generate revenue from the sale of products (hardware and/or software), services, or a combination thereof. We enter into contracts that may involve multiple performance obligations, and we allocate the transaction price between each performance obligation on the basis of relative standalone selling price (“SSP”). Revenue is recognized net of allowances for returns and any taxes collected from customers, which are subsequently remitted to governmental authorities. Product revenues are generated predominantly from the sale of various types of design and test software and hardware. Products consist of standalone software and hardware generally installed with software applications that are licensed on a perpetual and term basis. Our hardware products generally do not have any substantive acceptance terms that would otherwise preclude the transfer of control. Performance obligations related to our software licenses, including the license portion of our software subscriptions, grant the customer the right to use our software primarily via electronic delivery. Service revenues consist of repair and calibration services, extended warranties, technical support for hardware and software, when-and-if available software updates and upgrades, and professional services, including installation and implementation, consulting, and training. Services include both hardware and software services. Repair and calibration services for hardware products are sold both as per-incident customer services and as customer agreements to provide such services over the contractual period. Extended warranties are optional to the customer and provide warranty on hardware products for additional years beyond the standard one-year warranty. Technical support for software and when-and-if available software updates and upgrades are sold either together with our software licenses and software subscriptions, or separately as part of our customer support programs. These are considered stand-ready performance obligations where customers benefit from the services evenly throughout the license or service period. Our professional services may be sold on a time and material basis (e.g., consulting) or on a fixed-fee basis (e.g., non-recurring engineering). We also generate revenues from a combination of products and services (“custom solutions”), including combinations of hardware, software, software subscriptions, installation, professional services, and other support services to meet customers’ unique specifications. For our contracts with customers, we account for individual performance obligations separately if they are distinct. Our standard payment terms are net 30 to 90 days, and we generally do not offer extended payment terms beyond one year. Our contracts typically contain various forms of variable consideration, including trade discounts, trade-in credits, rebates, and rights of return. The transaction price is allocated to the separate performance obligations based on relative SSP. SSPs for a majority of our products and services are estimated based on our established pricing practices and maximize the use of observable inputs. An observable input is the price of the good or service when it is sold as a separate item in a similar circumstance and to a similar customer as in the contract for which SSPs are being determined. We have elected to exclude from the measurement of the transaction price all taxes assessed by a governmental authority that are both imposed on and concurrent with a specific revenue-producing transaction and collected by Keysight from a customer (e.g., sales, use, value added, and some excise taxes). We have also elected to account for shipping and handling activities that occur after control of the related good transfers as fulfillment activities instead of assessing such activities as performance obligations. Our typical performance obligations include the following:
Significant judgment is required to determine the SSP for each distinct performance obligation. Many of our contracts include multiple performance obligations with a combination of distinct products and services, maintenance and support, professional services, and/or training. For contracts with multiple performance obligations, we allocate the total transaction value to each distinct performance obligation based on relative SSP. In doing so, we consider our internal price list for each product and service, which reflects our desired profitability, based on an expected level of sales, and adjust for factors such as competition, customer relationship, discount provided in the contract, geographic location, and the products and services purchased in the arrangement. We use a range based on actual historical sales to determine whether the calculated SSP for a product or service is a fair representation of the SSP. For capitalized contract costs, we use judgment in determining the capitalized amount and amortization period. Our products are generally sold with a right of return, and we may provide other credits, discounts, or incentives, which are accounted for as variable consideration at the portfolio level and estimated based on historical information. Returns, credits, and discounts are estimated at contract inception and updated at the end of each reporting period as additional information becomes available to the extent that it is probable a significant reversal of the cumulative amount of revenue recognized will not occur once the variability is subsequently resolved. See Note 3, “Revenue,” for additional information. Shipping and handling costs. Our shipping and handling costs charged to customers are included in “revenue” and the associated expense is recorded in “cost of products” for all periods presented. Deferred revenue. We recognize contract liabilities in our consolidated balance sheet as deferred revenue, which represents the amount of service and software revenue deferred and recognized over the contractual period or as services are rendered and accepted by the customer. In addition, it includes the amount allocated to undelivered performance obligations.
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| Accounts receivable, net | Accounts receivable, net. Trade accounts receivable is recorded at the invoiced amount and does not bear interest. Such accounts receivable has been reduced by an allowance for credit losses, which is our best estimate of the amount of probable credit losses in our existing accounts receivable. We determine the allowance based on customer specific experience and the aging of such receivables, among other factors. The allowance for credit losses was approximately $12 million and $9 million, respectively, as of October 31, 2025 and 2024.
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| Share-based Payment Arrangement | Share-based compensation. We account for share-based awards made to our employees and directors, including restricted stock units (“RSUs”), employee stock purchases made under our employee stock purchase plan (“ESPP”), employee stock option awards, and performance share awards under our Long-Term Performance (“the LTP”) Program, using the estimated grant date fair value on a straight-line basis over the requisite service period of the award. Forfeitures are recognized as they occur and are reductions from share-based compensation expense. See Note 4, “Share-Based Compensation,” for additional information.
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| Inventory | Inventory. Inventory is valued at standard cost, which approximates actual cost computed on a first-in, first-out basis, not exceeding net realizable value. We assess the valuation of our inventory periodically and adjust the value for estimated excess and obsolete inventory based on future demand and actual usage. See Note 13, “Supplemental Financial Information,” for additional information.
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| Warranty | Warranty. Keysight warranties on products sold through direct sales channels are primarily for one year. Warranties for products sold through distribution channels are primarily for three years. We accrue for standard warranty costs based on historical trends in warranty charges. The accrual is reviewed regularly and periodically adjusted to reflect changes in warranty cost estimates. Estimated warranty charges are recorded within “cost of products” at the time related product revenue is recognized. See Note 13, “Supplemental Financial Information,” for additional information. We also sell extended warranties that provide warranty coverage beyond the standard warranty term. Revenue associated with extended warranties is deferred and recognized over the extended coverage period.
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| Loss contingencies | Loss contingencies. We accrue for probable losses from contingencies, including legal settlement costs, on an undiscounted basis when such costs are considered probable of being incurred and are reasonably estimable. We periodically evaluate available information, both internal and external, relative to such contingencies and adjust this accrual as necessary. If a loss is reasonably possible but not probable, or if the amount cannot be reasonably estimated, we disclose the nature of the contingency and, where practicable, an estimate of the possible loss or range of loss.
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| Taxes on income | Taxes on income. Income tax expense is based on income or loss before taxes. Deferred income taxes reflect the effect of temporary differences between asset and liability amounts that are recognized for financial reporting purposes and the amounts that are recognized for income tax purposes. These deferred taxes are measured by applying currently enacted tax laws. Valuation allowances are recognized to reduce deferred tax assets to the amount that is more likely than not to be realized. We account for uncertainty in income taxes using a two-step approach to recognize and measure uncertain tax positions. The first step is to evaluate the tax position for recognition by determining if the weight of available evidence indicates that it is more likely than not that the position will be sustained on audit, including resolution of related appeals or litigation processes, if any. The second step is to measure the tax benefit as the largest amount that is more than 50 percent likely of being realized upon settlement. We make adjustments to these reserves when facts and circumstances change, such as the closing of a tax audit or the refinement of an estimate due to new information. We classify the liability for unrecognized tax benefits as current to the extent that the company anticipates payment (or receipt) of cash within one year. Interest and penalties related to uncertain tax positions are recognized in “provision for income taxes.” Given the number of years and numerous matters that remain subject to examination in various tax jurisdictions, we are unable to estimate the range of possible changes to the balance of our unrecognized tax benefits. See Note 5, “Income Taxes,” for additional information.
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| Business Combination | Business Combinations. We include the results of operations of the businesses that we acquire as of the acquisition date. We allocate the purchase price of the acquisitions to the assets acquired and liabilities assumed based on their estimated fair values, except for revenue contracts acquired, which are recognized in accordance with our revenue recognition policy. The excess of the purchase price over the estimated fair values of identifiable assets and liabilities is recorded as “goodwill.” Acquisition-related expenses are recognized separately from the business combination and are expensed as incurred. See Note 2, “Acquisitions,” for additional information.
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| Goodwill and other intangible assets | Goodwill and other intangible assets. Goodwill is assessed for impairment on a reporting unit basis at least annually in the fourth quarter, as of September 30, after the annual update to our long-term financial forecasts, or more frequently when events and circumstances occur indicating that the recorded goodwill may be impaired. The impairment test compares the fair value of a reporting unit with its carrying amount, with an impairment charge recorded for the amount by which the carrying amount exceeds the reporting unit’s fair value up to a maximum amount of the goodwill balance for the reporting unit. Other intangible assets with finite lives consist primarily of developed technologies, trademarks, customer relationships, non-compete agreements, and acquired backlog and are amortized using the straight-line method over estimated useful lives ranging from 1 to 12 years. We review other intangible assets for impairment whenever events or changes in business circumstances indicate that the carrying amount of the assets may not be fully recoverable or that the useful lives of these assets are no longer appropriate. Other intangible assets with indefinite-lives are generally in-process research and development (“IPR&D”) intangible assets. The authoritative accounting guidance allows a qualitative approach for testing indefinite-lived intangible assets for impairment, similar to the impairment testing guidance for goodwill. It allows the option to first assess qualitative factors (events and circumstances) that could have affected the significant inputs used in determining the fair value of the indefinite-lived intangible asset. The qualitative factors assist in determining whether it is more likely than not that the indefinite-lived intangible asset is impaired. An organization may choose to bypass the qualitative assessment for any indefinite-lived intangible asset in any period and proceed directly to calculating its fair value. We review IPR&D for impairment annually or whenever events or changes in business circumstances indicate that the carrying amount of the assets may not be fully recoverable. See Note 2, “Acquisitions,” and Note 7, “Goodwill and Other Intangible Assets,” for additional information about our goodwill and other intangible assets.
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| Impairment of long-lived assets | Impairment of long-lived assets. We continually monitor events and changes in circumstances that could indicate carrying amounts of long-lived assets may not be recoverable. When such events or changes in circumstances occur, we assess the recoverability of long-lived assets by determining whether the carrying value of such assets will be recovered through undiscounted expected future cash flows. If the total of the undiscounted future cash flows is less than the carrying amount of those assets, we recognize an impairment loss based on the excess of the carrying amount over the fair value of the assets.
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| Advertising | Advertising. Advertising costs are expensed as incurred and were $14 million in 2025, $18 million in 2024, and $24 million in 2023.
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| Research and development | Research and development. Costs related to the research, design, and development of our products are charged to research and development (“R&D”) expense as they are incurred.
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| Government Assistance | Government assistance. Keysight receives various forms of government assistance, primarily through grants related to the development of new products and tax credits related to capital expenditures. We record proceeds from government grants when there is reasonable assurance that we will comply with the relevant conditions of the grant agreement and the grant funds will be received. Grants in recognition of specific expenses are recognized in the same period as an offset to those related expenses. Grants in form of tax credits related to capital expenditures are recognized as a reduction to property, plant and equipment with a corresponding reduction to depreciation expense over the expected useful life of the related asset. Grants received from new or existing arrangements in 2025, 2024, and 2023 were $2 million, $8 million, and $4 million, respectively, and are included as an offset to “research and development” in the consolidated statement of operations. Grant proceeds receivable as of October 31, 2025 and 2024 were $5 million and $6 million, respectively, and are included in “other current assets” in the consolidated balance sheet. Grant proceeds received prior to Keysight meeting the conditions of the grant are included in “other accrued liabilities” and “other long-term liabilities” in the consolidated balance sheet and were $6 million as of October 31, 2025 and $4 million as of October 31, 2024. Grant income included in “other operating income (expense), net” in the consolidated statement of operations was not material for fiscal 2025, 2024, and 2023. Tax credits related to capital expenditures reduced property, plant and equipment by $1 million and $7 million in 2025 and 2024, respectively.
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| Investments | Investments. Investments with readily determinable fair values are reported at fair value. Equity investments without readily determinable fair values are measured at cost with adjustments for observable changes in price or impairments. Gains or losses resulting from changes in fair value are recognized currently in earnings. The company assesses investments for impairment whenever events or changes in circumstances indicate that the carrying value of an investment may not be recoverable. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Fair value of financial instruments | Fair value of financial instruments. The carrying values of certain of our financial instruments, including cash and cash equivalents, accounts receivable, accounts payable, and other accrued liabilities, approximate fair value because of their short maturities. The fair value of long-term equity investments is determined using quoted market prices for those securities when available. For those long-term equity investments accounted for under a measurement alternative, the carrying value approximates estimated fair value. The fair value of foreign currency contracts used for hedging purposes is estimated internally by using inputs tied to active markets. These inputs, for example, interest rate yield curves, foreign exchange rates, and forward and spot prices for currencies, are observable in the market or can be corroborated by observable market data for substantially the full term of the assets or liabilities. See Note 8, “Fair Value Measurements,” for additional information.
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| Net income per share | Net income per share. Basic net income per share is computed by dividing net income by the weighted average number of common shares outstanding during the period excluding the dilutive effect of share-based awards. Diluted net income per share gives effect to all potentially dilutive common stock equivalents outstanding during the period. The dilutive effect of share-based awards is reflected in diluted net income per share by application of the treasury stock method, which includes consideration of unamortized share-based compensation expense, and the dilutive effect of in-the-money options, non-vested RSUs, LTP program awards, and potential ESPP issuances. Under the treasury stock method, the amount the employee must pay for exercising stock options and unamortized share-based compensation expense are assumed proceeds to be used to repurchase hypothetical shares. Potentially dilutive shares whose effect would have been antidilutive are excluded from the computation of diluted net income per share. See Note 6, “Net Income Per Share,” for additional information.
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| Cash, cash equivalents and short term investments | Cash, cash equivalents and short-term investments. We classify investments as cash equivalents if their original maturity or remaining maturity at the time of purchase is three months or less at the date of purchase. Cash equivalents are stated at cost, which approximates fair value. Our cash and cash equivalents mainly consist of investments in institutional money market funds, short-term deposits held at major global financial institutions, and similar short duration instruments with original maturities of three months or less. We continuously monitor the creditworthiness of the financial institutions in which we invest our funds. We utilize a variety of funding strategies in an effort to ensure that our worldwide cash is available in the locations in which it is needed. Most significant international locations have access to internal funding through an offshore cash pool for working capital needs. In addition, a few locations that are unable to access internal funding have access to temporary local overdraft and short-term working capital lines of credit. We classify investments as short-term investments if their original maturities are greater than three months and their remaining maturities are one year or less.
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| Concentration Risk, Credit Risk, Policy | Concentration of credit risk. Financial instruments that potentially subject us to concentration of credit risk principally includes cash and cash equivalents, short-term and long-term investments, derivative financial instruments, and accounts receivables. Cash and cash equivalents primarily consists of money market fund investments, time deposits, and demand deposit balances. We invest in a variety of financial instruments and limit the amount of credit exposure with any one financial institution. We have a comprehensive credit policy in place and credit exposure is monitored on an ongoing basis. Credit risk with respect to our accounts receivable is diversified due to the large number of entities comprising our customer base and their dispersion across many different industries and geographies. Credit evaluations are performed on customers requiring credit over a certain amount. Credit risk is mitigated through collateral, such as letters of credit, bank guarantees, or payment terms like cash in advance. No single customer accounted for more than 10 percent of accounts receivable as of October 31, 2025 or 2024.
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| Derivative instruments | Derivative instruments. We are exposed to global foreign currency exchange rate fluctuations in the normal course of business. We enter into foreign exchange hedging contracts and primarily use forward contracts to manage financial exposures resulting from changes in foreign currency exchange rates. Foreign currency exposures include committed and anticipated revenue and expense transactions (cash flow exposure) and monetary assets and liabilities that are denominated in currencies other than the functional currency of the subsidiary (balance sheet exposure). For cash flow hedges, contracts are designated at inception as hedges of the related foreign currency exposures. We formally document all relationships between hedging instruments and hedged items, as well as our risk-management objective and strategy for undertaking various hedge transactions at the inception of the hedge. This process includes linking all derivatives that are designated as cash flow hedges to specific forecasted transactions. We also formally assess, both at the hedge’s inception and on an ongoing basis, whether the hedging instruments are highly effective in offsetting changes in cash flows of hedged items. Our foreign exchange cash flow hedging contracts have maturities based on a rolling period of up to twelve months. We do not use derivative financial instruments for speculative trading purposes. All derivatives are recognized on the balance sheet at their fair values. For derivative instruments that are designated and qualify as cash flow hedges, changes in the value of the effective portion of the derivative instruments are recognized in accumulated other comprehensive income (loss), a component of stockholders' equity. Amounts associated with cash flow hedges are reclassified and recognized in income when either the forecast transaction occurs or it becomes probable the forecast transaction will not occur. Derivatives not designated as hedging instruments are recorded on the balance sheet at fair value, and changes in fair value are recorded in earnings in the current period. Derivative instruments are subject to master netting arrangements with the respective counterparties to allow for net settlement under certain conditions. Cash flows from derivative instruments are classified in the statement of cash flows in the same category as the cash flows from the hedged or economically hedged item, primarily in operating activities. See Note 9, “Derivatives,” for additional information.
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| Property, plant and equipment | Property, plant and equipment. Property, plant and equipment are stated at cost less accumulated depreciation. Additions, improvements, and major renewals are capitalized; maintenance, repairs, and minor renewals are expensed as incurred. When assets are retired or disposed of, the assets and related accumulated depreciation are removed from our general ledger, and the resulting gain or loss is reflected in the consolidated statement of operations. We use the straight-line method to depreciate assets. Buildings and improvements are depreciated over the lesser of their useful lives, which is generally over five years to forty years, or the remaining term of the lease; and machinery and equipment is generally depreciated over three years to ten years. See Note 13, “Supplemental Financial Information,” for additional information.
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| Restructuring costs | Restructuring costs. The main component of our existing restructuring plans is related to workforce reductions and site restructuring. Workforce reduction charges are accrued when payment of benefits becomes probable and the amounts can be estimated. If the amounts and timing of cash flows from restructuring activities are significantly different from what we have estimated, the actual amount of restructuring and other related charges could be materially different, either higher or lower, than those we have recorded.
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| Employee compensation and benefits | Employee compensation and benefits. Amounts owed to employees, such as accrued salary, bonuses, and vacation benefits are reported within “employee compensation and benefits” in the consolidated balance sheet. The total amount of accrued vacation benefit was $130 million and $114 million as of October 31, 2025 and 2024, respectively.
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| Foreign currency translation | Foreign currency translation. We translate and remeasure balance sheet and statement of operations items into U.S. dollars. For those subsidiaries that operate in a local currency functional environment, all assets and liabilities are translated into U.S. dollars using current exchange rates at the balance sheet date; revenue and expenses are translated using monthly exchange rates that approximate average exchange rates. Resulting translation adjustments are reported as a separate component of “accumulated other comprehensive income (loss)” in stockholders' equity in our consolidated balance sheet. For those subsidiaries that operate in a U.S. dollar functional environment, foreign currency assets and liabilities are re-measured into U.S. dollars at current exchange rates except for non-monetary assets and capital accounts, which are remeasured at historical exchange rates. Revenue and expenses are generally remeasured at monthly exchange rates that approximate average exchange rates. Gains or losses from foreign currency re-measurement are included in “net income.” Net gains or losses resulting from foreign currency asset and liability remeasurement transactions are reported in “other income (expense), net” and were a $47 million gain in 2025, a $19 million gain in 2024, and a $49 million loss in 2023. See Note 9, “Derivatives” for additional information.
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| Retirement plans and post-retirement benefit plan assumptions | Retirement plans and post-retirement benefit plan assumptions. Defined benefit plan obligations are remeasured at least annually as of October 31, based on the present value of future benefit payments to reflect future benefit costs over the employees' average expected future service to Keysight based on the terms of the plans. To estimate the present value of these future payments, we are required to make assumptions using actuarial concepts within the framework of GAAP. Two critical assumptions are the discount rate and the expected long-term return on plan assets. Other important assumptions include expected future salary increases, expected future increases to benefit payments, expected retirement dates, employee turnover, retiree mortality rates, and investment portfolio composition. We evaluate these assumptions at least annually. See Note 12, “Retirement Plans and Post-Retirement Benefit Plans,” for additional information.
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| Lessee, Leases | Leases. We determine whether an arrangement is a lease at inception. Operating leases are included in “operating lease right-of-use (“ROU”) assets” and “operating lease liabilities” (current and non-current) on our consolidated balance sheet. Finance leases are included in “property, plant and equipment, net,” “other accrued liabilities,” and “other long-term liabilities” in our consolidated balance sheet. Our finance lease and lessor arrangements were immaterial in 2025, 2024, and 2023. ROU assets and lease obligations are recognized based on their present value of the future minimum lease payments over the lease term at commencement date. As most of our leases do not provide an implicit rate, we use our incremental borrowing rate based on the lease term and economic environment to discount lease obligations. ROU assets also include any lease payments made and exclude lease incentives and initial direct costs incurred. We initially measure payments based on an index by using the applicable rate at lease commencement. Variable payments that do not depend on an index are not included in the lease liability and are recognized as they are incurred. See Note 10, “Leases,” for additional information.
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ACQUISITIONS (Tables) |
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| Business Combination, Asset Acquisition, Transaction between Entities under Common Control, and Joint Venture Formation [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Business Combination | Total purchase consideration was determined as follows:
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| Business Combination, Recognized Asset Acquired and Liability Assumed | The following table summarizes the preliminary allocation of the purchase price to the estimated fair values of the assets acquired and liabilities assumed on the closing date:
The following table summarizes the preliminary allocation of the purchase price to the estimated fair values of the assets acquired and liabilities assumed on the closing date:
The following table summarizes the allocation of the purchase price to the estimated fair values of the assets acquired and liabilities assumed on the closing date:
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| Business Combination, Intangible Asset, Acquired, Finite-Lived and Indefinite-Lived | The components of intangible assets acquired in connection with the Spirent acquisition were as follows:
The components of intangible assets acquired in connection with the OSG acquisition were as follows:
The components of intangible assets acquired in connection with the ESI Group acquisition were as follows:
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| Business Combination, Pro Forma Information | The following represents pro forma operating results as if Spirent and OSG had been consolidated effective at the beginning of fiscal 2024, and ESI Group had been consolidated effective at the beginning of fiscal 2023:
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REVENUE Disaggregation of revenue (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Oct. 31, 2025 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Revenue Recognition [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Disaggregation of Revenue [Table Text Block] | Disaggregation of Revenue We disaggregate our revenue from contracts with customers by geographic region, end market, and timing of revenue recognition, as we believe these categories best depict how the nature, amount, timing and uncertainty of our revenue and cash flows are affected by economic factors. Disaggregated revenue is presented for each of our reportable segments, CSG and EISG.
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| Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] |
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SHARE-BASED COMPENSATION (Tables) |
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| Share-Based Payment Arrangement, Noncash Expense [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs | The impact of share-based compensation expense on our consolidated statement of operations was as follows:
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| Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions And Methodology | The following assumptions were used to estimate the fair value of TSR-based performance awards.
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| Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Roll Forward | The following table summarizes non-vested award activity in 2025 for our LTP Program and restricted stock unit awards:
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INCOME TAXES (Tables) |
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| Income Tax Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Income before Income Tax, Domestic and Foreign | The domestic and foreign components of income before taxes are:
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| Schedule of Components of Income Tax Expense (Benefit) | The provision for income taxes consisted of:
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| Income Tax Effects On Net Deferred Tax Assets Liabilities Disclosure | The following table presents the components of the deferred tax assets and liabilities:
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| Summary Of Income Tax Expense Reconciliation | The differences between the U.S. federal statutory income tax rate and our effective tax rate are:
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| Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block] | The aggregate changes in the balances of our unrecognized tax benefits including all federal, state, and foreign tax jurisdictions are as follows:
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NET INCOME PER SHARE (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Oct. 31, 2025 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Earnings Per Share [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] | The following table presents the calculation of basic and diluted net income (loss) per share:
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GOODWILL AND OTHER INTANGIBLE ASSETS (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Oct. 31, 2025 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Goodwill and Intangible Assets Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Goodwill | The goodwill balances as of October 31, 2025, 2024, and 2023 and the movements in 2025 and 2024 for each of our reportable segments were as follows:
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| Schedule of Other Intangible Assets by Major Class | Other intangible assets as of October 31, 2025 and 2024 consisted of the following:
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| Finite-lived Intangible Assets Amortization Expense | Estimated future amortization expense for our intangible assets as of October 31, 2025 is as follows:
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FAIR VALUE MEASUREMENTS (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Oct. 31, 2025 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Fair Value Disclosures [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Fair Value Assets and Liabilities Measured on Recurring Basis | Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis Financial assets and liabilities measured at fair value on a recurring basis as of October 31, 2025 and 2024 were as follows:
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| Debt Securities, Trading, and Equity Securities, FV-NI | Realized gains and losses from the sale of investments are recorded in earnings. Net realized and unrealized gain on our equity and other investments was as follows:
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DERIVATIVES (Tables) |
12 Months Ended | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Oct. 31, 2025 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Derivative Instruments and Hedging Activities Disclosure [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Derivative Instruments | The aggregated notional amounts by currency and designation as of October 31, 2025 were as follows:
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| Schedule of Derivative Instruments in Statement of Financial Position, Fair Value | The gross fair values and balance sheet presentation of derivative instruments held as of October 31, 2025 and 2024 were as follows:
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| Derivative Instruments, Gain (Loss) | The effect of derivative instruments for foreign exchange contracts designated as hedging instruments and not designated as hedging instruments in our consolidated statement of operations was as follows:
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LEASES (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Oct. 31, 2025 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Leases [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Lease, Cost [Table Text Block] | The following table summarizes the components of our lease cost:
Sublease income and finance lease costs were immaterial for the years ended October 31, 2025, 2024, and 2023. Supplemental information related to our operating leases was as follows:
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| Lessee, Operating Lease, Liability, Maturity [Table Text Block] | The maturities of our operating leases as of October 31, 2025 with initial terms exceeding one year were as follows:
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DEBT (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Oct. 31, 2025 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Debt Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Long-term Debt Instruments | The following table summarizes the components of our debt:
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RETIREMENT PLANS AND POST RETIREMENT PENSION PLANS (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Retirement Benefits [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Defined Benefit Plans Disclosures | For the years ended October 31, 2025, 2024, and 2023, components of net periodic benefit cost (benefit) and other amounts recognized in other comprehensive income consisted of:
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| Schedule of Changes in Fair Value of Plan Assets | As of October 31, 2025 and 2024, the funded status of the defined benefit and post-retirement benefit plans was as follows:
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| Schedule of Allocation of Plan Assets | The following tables present the fair value of U.S. Defined Benefit Plans assets classified under the appropriate level of the fair value hierarchy as of October 31, 2025 and 2024:
(a) Certain instruments that are measured at fair value using the NAV per share practical expedient have not been categorized in the fair value hierarchy. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the total value of plan assets. For U.S. Defined Benefit Plans, there was no activity relating to assets measured at fair value using significant unobservable inputs (Level 3) during 2025 and 2024. The following tables present the fair value of U.S. Post-Retirement Benefit Plan assets classified under the appropriate level of the fair value hierarchy as of October 31, 2025 and 2024:
(a) Certain instruments that are measured at fair value using the NAV per share practical expedient have not been categorized in the fair value hierarchy. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the total value of plan assets. For the U.S. Post-Retirement Benefit Plan, there was no activity relating to assets measured at fair value using significant unobservable inputs (Level 3) during 2025 and 2024. The following tables present the fair value of Non-U.S. Defined Benefit Plans assets classified under the appropriate level of the fair value hierarchy as of October 31, 2025 and 2024:
(a) Certain instruments that are measured at fair value using the NAV per share practical expedient have not been categorized in the fair value hierarchy. The fair value amounts presented in this table are intended to permit reconciliation of the fair value hierarchy to the total value of plan assets.
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| Schedule of Effect of Significant Unobservable Inputs, Changes in Plan Assets | For Non-U.S. Defined Benefit Plans assets measured at fair value using significant unobservable inputs (Level 3), the following table summarizes the change in balances during 2025 and 2024:
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| Schedule of Benefit Obligations in Excess of Fair Value of Plan Assets | The table below presents the combined projected benefit obligation (“PBO”), accumulated benefit obligation (“ABO”) and fair value of plan assets, grouping plans using comparisons of the PBO and ABO relative to the plan assets as of October 31, 2025 and 2024:
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| Schedule of Expected Benefit Payments | Contributions and estimated future benefit payments. For 2026, we do not expect to contribute to our U.S. Defined Benefit Plans or U.S. Post-Retirement Benefit Plan, and we expect to contribute $14 million to our Non-U.S. Defined Benefit Plans. The following table presents expected future benefit payments for the next 10 years.
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| Schedule of Assumptions Used | Assumptions used to calculate the net periodic benefit cost (benefit) were as follows:
Assumptions used to calculate the benefit obligation as of October 31, 2025 and 2024 were as follows:
Health care trend rates did not have a significant effect on the total service and interest cost components or on the post-retirement benefit obligation amounts reported for the U.S. Post-Retirement Benefit Plan for the years ended October 31, 2025 and 2024.
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SUPPLEMENTAL FINANCIAL INFORMATION (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Oct. 31, 2025 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Supplemental Cash Flow Elements [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Cash Flow, Supplemental Disclosures | Cash, cash equivalents, and restricted cash
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| Schedule of Inventory, Current | Inventory
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| Property, Plant and Equipment | Property, plant and equipment
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| Standard Warranty | Standard warranty Activity related to the standard warranty accrual, which is included in “other accrued liabilities” and “other long-term liabilities” in our consolidated balance sheet, is as follows:
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| Schedule of Other Current Assets | Other current assets
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| Total other assets | Other assets
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STOCKHOLDERS' EQUITY (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Oct. 31, 2025 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Statement of Comprehensive Income [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Accumulated Other Comprehensive Income (Loss) | The following table summarizes the components of accumulated other comprehensive loss, net of tax effect:
Changes in accumulated other comprehensive loss by component and related tax effects were as follows:
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| Reclassification out of Accumulated Other Comprehensive Income | Reclassifications out of accumulated other comprehensive loss into earnings were as follows:
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SEGMENT INFORMATION (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Oct. 31, 2025 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Segment Reporting [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Segment Reporting Information, by Segment |
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| Reconciliation of Operating Profit (Loss) from Segments to Consolidated | The following table reconciles reportable segments’ income from operations to our income before taxes as reported:
“Restructuring and other” includes legal expenses of $17 million and $23 million in 2024 and 2023, respectively.
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| Assets And Capital Expenditures Directly Managed By Each Segment | The following table presents segment assets and capital expenditures directly managed by each segment.
The following table reconciles segment assets to our total assets:
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| Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas | The following tables present summarized information for revenue and long-lived assets by country. Revenues from external customers are generally attributed to countries based upon the customer's location. Long-lived assets consist of property, plant, and equipment, operating lease right-of-use assets, and other long-term assets, excluding intangible assets.
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ACQUISITIONS PURCHASE PRICE ALLOCATIONS (Details) - USD ($) $ in Millions |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Oct. 17, 2025 |
Oct. 15, 2025 |
Nov. 03, 2023 |
Oct. 31, 2025 |
Oct. 31, 2024 |
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| Business Combination [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Goodwill arising from acquisitions | $ 1,001 | $ 738 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Business Combination, Recognized Asset Acquired and Liability Assumed | The following table summarizes the preliminary allocation of the purchase price to the estimated fair values of the assets acquired and liabilities assumed on the closing date:
The following table summarizes the preliminary allocation of the purchase price to the estimated fair values of the assets acquired and liabilities assumed on the closing date:
The following table summarizes the allocation of the purchase price to the estimated fair values of the assets acquired and liabilities assumed on the closing date:
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Spirent plc | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Business Combination [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Cash and cash equivalents | $ 127 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Inventory | 40 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Accounts receivable | 71 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Assets held for sale | 433 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Other current assets | 28 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Property, plant and equipment | 28 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Operating lease right-of-use assets | 11 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Goodwill arising from acquisitions | 698 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Other intangible assets | 528 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Other assets | 8 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Total assets acquired | 1,972 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Accounts payable | (13) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Employee compensation and benefits | (40) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Deferred revenue | (44) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Operating lease liabilities | (3) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Liabilities held for sale | (34) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Other accrued liabilities | (70) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Long-term deferred revenue | (14) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Long-term operating lease liabilities | (9) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Other long-term liabilities | (181) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Net assets acquired | $ 1,564 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Synopsys' Optical Solutions Group business | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Business Combination [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Accounts receivable | $ 15 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Other current assets | 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Property, plant and equipment | 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Operating lease right-of-use assets | 2 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Goodwill arising from acquisitions | 298 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Other intangible assets | 275 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Total assets acquired | 592 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Deferred revenue | (8) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Operating lease liabilities | (1) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Long-term deferred revenue | 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Long-term operating lease liabilities | (1) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Net assets acquired | $ 581 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| ESI Group SA | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Business Combination [Line Items] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Cash and cash equivalents | $ 35 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Short-term investments | 12 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Accounts receivable | 28 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Other current assets | 18 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Property, plant and equipment | 4 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Operating lease right-of-use assets | 8 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Goodwill arising from acquisitions | 603 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Other intangible assets | 494 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Other assets | 3 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Total assets acquired | 1,205 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Accounts payable | (8) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Employee compensation and benefits | 23 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Deferred revenue | (14) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Income and other taxes payable | (11) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Operating lease liabilities | 3 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Other accrued liabilities | (18) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Debt | (24) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Retirement and post-retirement benefits | 7 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Long-term operating lease liabilities | (5) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Other long-term liabilities | (115) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Net assets acquired | $ 977 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
SPIRENT RELATED DIVESTITURE (Details) - USD ($) $ in Millions |
12 Months Ended | |||
|---|---|---|---|---|
Oct. 16, 2025 |
Oct. 31, 2025 |
Oct. 31, 2024 |
Oct. 31, 2023 |
|
| Business Combination [Line Items] | ||||
| Proceeds from divestiture | $ 399 | $ 399 | $ 0 | $ 0 |
| Net loss from discontinued operations before income taxes | (6) | |||
| Discontinued Operation, Tax Effect of Discontinued Operation | (13) | |||
| Net loss from discontinued operations, net of income taxes | $ (19) | $ 0 | $ 0 | |
| acquisition-related compensation related to discorps | $ 5 | |||
ACQUISITIONS OF ANSYS POWERARTIST (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Oct. 31, 2025 |
Oct. 31, 2024 |
Oct. 31, 2023 |
|
| Business Combination [Line Items] | |||
| Payments to Acquire Businesses, Net of Cash Acquired | $ 2,022 | $ 681 | $ 85 |
| Goodwill arising from acquisitions | 1,001 | $ 738 | |
| Ansys' PowerArtist | |||
| Business Combination [Line Items] | |||
| Payments to Acquire Businesses, Net of Cash Acquired | 26 | ||
| Goodwill arising from acquisitions | 2 | ||
| Other intangible assets | $ 17 | ||
ACQUISITIONS OF RISCURE (Details) - USD ($) $ in Millions |
12 Months Ended | |||
|---|---|---|---|---|
Feb. 21, 2024 |
Oct. 31, 2025 |
Oct. 31, 2024 |
Oct. 31, 2023 |
|
| Business Combination [Line Items] | ||||
| Payments to Acquire Businesses, Net of Cash Acquired | $ 2,022 | $ 681 | $ 85 | |
| Goodwill arising from acquisitions | $ 1,001 | $ 738 | ||
| Riscure Holding B.V. [Member] | ||||
| Business Combination [Line Items] | ||||
| Acquisition effective date | Feb. 21, 2024 | |||
| Payments to Acquire Businesses, Net of Cash Acquired | $ 78 | |||
| Goodwill arising from acquisitions | 52 | |||
| Other intangible assets | $ 35 | |||
ACQUISITIONS OF ANAPICO (Details) - USD ($) $ in Millions |
12 Months Ended | |||
|---|---|---|---|---|
Jun. 12, 2024 |
Oct. 31, 2025 |
Oct. 31, 2024 |
Oct. 31, 2023 |
|
| Business Combination [Line Items] | ||||
| Payments to Acquire Businesses, Net of Cash Acquired | $ 2,022 | $ 681 | $ 85 | |
| Goodwill arising from acquisitions | 1,001 | 738 | ||
| Gross Carrying Amount | 2,901 | 2,039 | ||
| In-Process R&D | $ 17 | $ 45 | $ 0 | |
| AnaPico AG | ||||
| Business Combination [Line Items] | ||||
| Acquisition effective date | Jun. 12, 2024 | |||
| Payments to Acquire Businesses, Net of Cash Acquired | $ 117 | |||
| Goodwill arising from acquisitions | 60 | |||
| Other intangible assets | $ 53 | |||
REVENUE Contract assets (Details) - USD ($) $ in Millions |
Oct. 31, 2025 |
Oct. 31, 2024 |
|---|---|---|
| Trade Accounts Receivable [Member] | ||
| Condensed Balance Sheet Statements, Captions [Line Items] | ||
| Contract with Customer, Asset, after Allowance for Credit Loss, Current | $ 125 | $ 88 |
REVENUE Contract cost (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Oct. 31, 2025 |
Oct. 31, 2024 |
Oct. 31, 2023 |
|
| Capitalized Contract Cost [Line Items] | |||
| Capitalized Contract Cost, Net | $ 44 | $ 35 | |
| Capitalized Contract Cost, Amortization | $ 63 | $ 57 | $ 62 |
REVENUE Contract liabilities (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Oct. 31, 2025 |
Oct. 31, 2024 |
Oct. 31, 2023 |
|
| Capitalized Contract Cost [Line Items] | |||
| Beginning balance | $ 767 | ||
| Deferral of revenue billed in current period, net of recognition | 549 | ||
| Deferred revenue arising out of acquisitions | 73 | ||
| Revenue recognized that was deferred as of the beginning of the period | 513 | $ 541 | $ 490 |
| Foreign currency translation impact | 8 | ||
| Ending balance | $ 884 | $ 767 | |
SHARE-BASED COMPENSATION (Fair Value Assumptions) (Details) - LTPP [Member] |
12 Months Ended | ||
|---|---|---|---|
Oct. 31, 2025 |
Oct. 31, 2024 |
Oct. 31, 2023 |
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Volatility of Keysight shares | 32.00% | 29.00% | 35.00% |
| Volatility of peer group | 31.00% | 18.00% | 25.00% |
| Price-wise correlation with peer group | 31.00% | 69.00% | 75.00% |
INCOME TAXES (Domestic and foreign components of Income before taxes) (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Oct. 31, 2025 |
Oct. 31, 2024 |
Oct. 31, 2023 |
|
| Domestic and foreign components of income (loss) before taxes | |||
| U.S. operations | $ 255 | $ 170 | $ 237 |
| Non-U.S. operations | 827 | 695 | 1,120 |
| Income from continuing operations before taxes, as reported | $ 1,082 | $ 865 | $ 1,357 |
INCOME TAXES (Provision (benefit) for Income Taxes) (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Oct. 31, 2025 |
Oct. 31, 2024 |
Oct. 31, 2023 |
|
| Provision (benefit) for Income Taxes | |||
| U.S. federal taxes - current | $ 97 | $ (52) | $ 185 |
| U.S. federal taxes - deferred | (17) | (47) | (54) |
| Non-U.S. taxes - current | 147 | 31 | 105 |
| Non-U.S. taxes - deferred | (29) | 323 | 54 |
| State taxes, net of federal benefit - current | 18 | 4 | 13 |
| State taxes, net of federal benefit - deferred | (3) | (8) | (3) |
| Income Tax Expense (Benefit) | 213 | $ 251 | $ 300 |
| Discontinued Operation, Tax Effect of Discontinued Operation | $ 13 | ||
INCOME TAXES Unrecognised tax benefits (Details) - USD ($) $ in Millions |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Oct. 31, 2025 |
Oct. 31, 2024 |
Oct. 31, 2023 |
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| Income Tax Uncertainties [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block] | The aggregate changes in the balances of our unrecognized tax benefits including all federal, state, and foreign tax jurisdictions are as follows:
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| Unrecognized Tax Benefits [Roll Forward] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Gross balance, beginning of year | $ 222 | $ 266 | $ 234 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Additions due to acquisition | 0 | 2 | 0 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Additions for tax positions related to the current year | 23 | 24 | 37 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Additions for tax positions from prior years | 2 | 0 | 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Reductions for tax positions from prior years | 0 | (22) | 0 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Settlements with taxing authorities | 0 | (45) | 0 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Statute of limitations expirations | (6) | (3) | (5) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Impact from currency fluctuations | 0 | 0 | (1) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Gross balance, end of year | 241 | $ 222 | $ 266 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Unrecognized Tax Benefits that Would Impact Effective Tax Rate | $ 150 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
INCOME TAXES (Penalties) (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Oct. 31, 2025 |
Oct. 31, 2024 |
Oct. 31, 2023 |
|
| Income Tax Disclosure [Abstract] | |||
| Interest and penalties accrued related to unrecognized tax benefits accrued and reported | $ 49 | $ 38 | $ 41 |
| Interest and penalties relating to unrecognized tax benefits recognized | 11 | $ 6 | $ 5 |
| Tax benefits penalties released due to settlement | 2 | ||
| Tax benefits penalties offset by expense | $ 13 | ||
INCOME TAXES (Details) Acquisitions and divestiture $ in Millions |
Oct. 31, 2025
USD ($)
|
|---|---|
| Income Tax Disclosure [Abstract] | |
| Business Combination, Recognized Liability Assumed, Deferred Tax Liability | $ 168 |
GOODWILL AND OTHER INTANGIBLE ASSETS (Roll Forward) (Details) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Oct. 31, 2025 |
Oct. 31, 2024 |
|
| Goodwill - Rollforward | ||
| Beginning Balance | $ 2,388 | $ 1,640 |
| Foreign currency translation impact | 35 | 10 |
| Goodwill arising from acquisitions | 1,001 | 738 |
| Ending Balance | 3,424 | 2,388 |
| CSG | ||
| Goodwill - Rollforward | ||
| Beginning Balance | 1,240 | 1,057 |
| Foreign currency translation impact | 3 | 2 |
| Goodwill arising from acquisitions | 724 | 181 |
| Ending Balance | 1,967 | 1,240 |
| EISG | ||
| Goodwill - Rollforward | ||
| Beginning Balance | 1,148 | 583 |
| Foreign currency translation impact | 32 | 8 |
| Goodwill arising from acquisitions | 277 | 557 |
| Ending Balance | $ 1,457 | $ 1,148 |
GOODWILL AND OTHER INTANGIBLE ASSETS (Narratives and Amortization Expense) (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Oct. 31, 2025 |
Oct. 31, 2024 |
Oct. 31, 2023 |
|
| Goodwill and Intangible Assets Disclosure [Abstract] | |||
| Goodwill impairment during the period | $ 0 | $ 0 | $ 0 |
| Goodwill, Impaired, Accumulated Impairment Loss | 709 | 709 | 709 |
| Goodwill arising from acquisitions | 1,001 | 738 | |
| Intangible assets acquired from acquisitions | 821 | 582 | |
| Transfer of IP R&D to developed technology | 33 | ||
| Finite-Lived Intangible Assets [Line Items] | |||
| Finite-Lived Intangible Assets, Translation Adjustments | 13 | ||
| Amortization of Intangible Assets | 137 | $ 138 | $ 90 |
| Amortization Expense, Maturity Schedule [Abstract] | |||
| 2026 | 262 | ||
| 2027 | 232 | ||
| 2028 | 229 | ||
| 2029 | 221 | ||
| 2030 | 141 | ||
| Thereafter | $ 202 | ||
GOODWILL AND OTHER INTANGIBLE ASSETS Impairment Data (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Oct. 31, 2025 |
Oct. 31, 2024 |
Oct. 31, 2023 |
|
| Goodwill and Intangible Assets Disclosure [Abstract] | |||
| Goodwill impairment | $ 0 | $ 0 | $ 0 |
| Impairment of Intangible Assets (Excluding Goodwill) | 0 | 0 | 0 |
| Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) | 0 | 0 | |
| In-Process R&D | 17 | 45 | 0 |
| Goodwill, Impaired, Accumulated Impairment Loss | $ 709 | $ 709 | $ 709 |
FAIR VALUE MEASUREMENT (Investments) (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Oct. 31, 2025 |
Oct. 31, 2024 |
Oct. 31, 2023 |
|
| Fair Value Disclosures [Abstract] | |||
| Equity Securities, FV-NI, Unrealized Gain (Loss) | $ (98) | $ (15) | $ (7) |
| Equity Securities, FV-NI, Realized Gain | $ 21 | $ 0 | $ 0 |
LEASES (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Oct. 31, 2025 |
Oct. 31, 2024 |
Oct. 31, 2023 |
|
| Leases [Abstract] | |||
| Lessee, Operating Lease, Description | We have operating leases for items including office space, manufacturing and production locations, sales and service centers, research and development facilities, and certain equipment, primarily automobiles. | ||
| Lessee, Operating Lease, Remaining Lease Term | 13 years | ||
| Lessee, Operating Lease, Option to Extend | include extension options that are reasonably certain to be exercised | ||
| Operating Lease, Weighted Average Remaining Lease Term | 6 years 6 months | 7 years | 7 years 9 months 18 days |
| Operating Lease, Weighted Average Discount Rate, Percent | 4.00% | 3.00% | 3.00% |
| Operating lease cost, including short-term lease cost | $ 60 | $ 59 | $ 52 |
| Variable lease cost | 21 | 22 | 22 |
| Sublease Income | 0 | 0 | 0 |
| Finance Lease, Interest Expense | $ 0 | $ 0 | $ 0 |
LEASES Supplemental information related to leases (details) (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Oct. 31, 2025 |
Oct. 31, 2024 |
Oct. 31, 2023 |
|
| Leases [Abstract] | |||
| Sublease Income | $ 0 | $ 0 | $ 0 |
| Finance Lease, Interest Expense | 0 | 0 | 0 |
| Cash payments for operating leases | 58 | 56 | 53 |
| ROU assets obtained in exchange for operating lease obligations | $ 36 | $ 46 | $ 51 |
| Operating Lease, Weighted Average Discount Rate, Percent | 4.00% | 3.00% | 3.00% |
LEASES Maturity analysis (Details) $ in Millions |
Oct. 31, 2025
USD ($)
|
|---|---|
| Leases [Abstract] | |
| 2026 | $ 60 |
| 2027 | 49 |
| 2028 | 39 |
| 2029 | 32 |
| 2030 | 27 |
| Thereafter | 67 |
| Total undiscounted lease liability | 274 |
| Imputed interest | 30 |
| Operating Lease, Liability | $ 244 |
LEASES Leases not yet commenced (Details) $ in Millions |
Oct. 31, 2025
USD ($)
|
|---|---|
| Leases [Abstract] | |
| Lessee Operating Lease, Lease Not Yet Commenced, Amount | $ 0 |
LEASES Lessor disclosure (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Oct. 31, 2025 |
Oct. 31, 2024 |
Oct. 31, 2023 |
|
| Leases [Abstract] | |||
| Operating Lease, Lease Income | $ 10 | $ 10 | $ 10 |
DEBT (Credit Facility) (Details) - Revolving Credit Facility [Member] $ in Millions |
12 Months Ended |
|---|---|
|
Oct. 31, 2025
USD ($)
| |
| Line of Credit Facility [Line Items] | |
| Line of Credit Facility, Initiation Date | Jul. 30, 2021 |
| Line of Credit Facility, Maximum Borrowing Capacity | $ 750 |
| Line of Credit Facility, Expiration Date | Jul. 30, 2026 |
| Debt Instrument, Description of Variable Rate Basis | Borrowings under the facility bear an annual interest rate of SOFR + 1.1 percent, including a facility fee of 0.1 percent per annum. |
| Additional amount of drawings | $ 250 |
| Line of Credit Facility, Fair Value of Amount Outstanding | $ 0 |
| Line of Credit Facility, Covenant Compliance | We were in compliance with the covenants of the Revolving Credit Facility during the year ended October 31, 2025. |
DEBT Fair Value (Details) - USD ($) $ in Millions |
Oct. 31, 2025 |
Oct. 31, 2024 |
|---|---|---|
| Debt Disclosure [Abstract] | ||
| Long-Term Debt, Fair Value | $ 2,565 | $ 1,739 |
DEBT Bridge Loan Facility (Details) - Bridge Loan [Member] - USD ($) $ in Millions |
12 Months Ended | |||
|---|---|---|---|---|
Oct. 31, 2025 |
Sep. 25, 2025 |
Jul. 25, 2024 |
Mar. 28, 2024 |
|
| Line of Credit Facility [Line Items] | ||||
| Line of Credit Facility, Initiation Date | Mar. 28, 2024 | |||
| Line of Credit Facility, Description | On March 28, 2024, we entered into a bridge credit agreement (the “Bridge Facility”) pursuant to which certain lenders agreed to provide a senior unsecured bridge credit facility of up to 1,350 million pounds sterling for the purpose of providing the financing to support a planned acquisition. On July 25, 2024, the Bridge Facility decreased to 1,232 million pounds sterling. On May 8, 2025, the Bridge Facility further decreased to 752 million pounds sterling and on September 25, 2025 the Bridge Facility was terminated. We incurred costs in connection with the Bridge Facility of $7 million that have been fully amortized to interest expense. | |||
| Payments of Financing Costs | $ 7 | |||
| Line of Credit Facility, Maximum Borrowing Capacity | $ 752 | |||
| Line Of Credit Facility, Original Borrowing Capacity | $ 1,232 | $ 1,350 | ||
| Line of Credit Facility, Expiration Date | Sep. 25, 2025 |
RETIREMENT PLANS AND POST RETIREMENT PENSION PLANS (Assets Measured at Fair Value Using Significant Unobservable Inputs) (Level 3) (Details) - Foreign Plan [Member] - Pension Plan [Member] - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Oct. 31, 2025 |
Oct. 31, 2024 |
|
| Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward] | ||
| Fair value — beginning of year | $ 1,136 | $ 985 |
| Fair value — end of year | 1,202 | 1,136 |
| Significant Unobservable Inputs (Level 3) | ||
| Defined Benefit Plan, Change in Fair Value of Plan Assets, Level 3 Reconciliation [Roll Forward] | ||
| Fair value — beginning of year | 247 | 233 |
| Unrealized gains | 8 | 15 |
| Purchases, sales, issuances and settlements | (18) | (17) |
| Transfers in | 254 | 0 |
| Currency impact | 3 | 16 |
| Fair value — end of year | $ 494 | $ 247 |
RETIREMENT PLANS AND POST RETIREMENT PENSION PLANS (Expected Benefit Payments) (Details) $ in Millions |
Oct. 31, 2025
USD ($)
|
|---|---|
| UNITED STATES | Pension Plan [Member] | |
| Future benefit payments [Abstract] | |
| 2028 | $ 57 |
| 2029 | 60 |
| 2030 | 56 |
| 2031 - 2035 | 60 |
| Defined Benefit Plan, Expected Future Benefit Payment, Year Five | 58 |
| Defined Benefit Plan, Expected Future Benefit Payment, after Year Five for Next Five Years | 262 |
| UNITED STATES | Other Postretirement Benefits Plan [Member] | |
| Future benefit payments [Abstract] | |
| 2028 | 15 |
| 2029 | 15 |
| 2030 | 15 |
| 2031 - 2035 | 15 |
| Defined Benefit Plan, Expected Future Benefit Payment, Year Five | 15 |
| Defined Benefit Plan, Expected Future Benefit Payment, after Year Five for Next Five Years | 62 |
| Foreign Plan [Member] | Pension Plan [Member] | |
| Future benefit payments [Abstract] | |
| 2028 | 48 |
| 2029 | 51 |
| 2030 | 53 |
| 2031 - 2035 | 54 |
| Defined Benefit Plan, Expected Future Benefit Payment, Year Five | 56 |
| Defined Benefit Plan, Expected Future Benefit Payment, after Year Five for Next Five Years | $ 280 |
SUPPLEMENTAL CASH FLOW INFORMATION - Reconciliation of cash and cash equivalents (Details) - USD ($) $ in Millions |
Oct. 31, 2025 |
Oct. 31, 2024 |
Oct. 31, 2023 |
Oct. 31, 2022 |
|---|---|---|---|---|
| Supplemental Cash Flow Elements [Abstract] | ||||
| Cash and cash equivalents | $ 1,873 | $ 1,796 | ||
| Restricted Cash and Cash Equivalent, Current | 15 | 0 | ||
| Restricted Cash and Cash Equivalent, Noncurrent | 2 | 18 | ||
| Cash, Cash Equivalents and Restricted Cash Equivalents | $ 1,890 | $ 1,814 | $ 2,488 | $ 2,057 |
SUPPLEMENTAL CASH FLOW INFORMATION - Inventory (Detail) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Oct. 31, 2025 |
Oct. 31, 2024 |
Oct. 31, 2023 |
|
| Inventory, Net [Abstract] | |||
| Inventory, Finished Goods, Net of Reserves | $ 425 | $ 375 | |
| Inventory, Work in Process and Raw Materials, Net of Reserves | 625 | 647 | |
| Inventory, Net, Total | 1,050 | 1,022 | |
| Inventory-related excess and obsolescence charges | $ 43 | $ 35 | $ 27 |
SUPPLEMENTAL CASH FLOW INFORMATION - Property, Plant and Equipment (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Oct. 31, 2025 |
Oct. 31, 2024 |
Oct. 31, 2023 |
|
| Property, Plant and Equipment [Line Items] | |||
| Property, Plant and Equipment, Gross | $ 2,599 | $ 2,480 | |
| Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment | (1,804) | (1,706) | |
| Property, plant and equipment, net | 795 | 774 | |
| Impairment, Long-Lived Asset, Held-for-Use | 0 | 0 | $ 0 |
| Depreciation | 131 | 126 | 120 |
| Inventory-related excess and obsolescence charges | 43 | 35 | $ 27 |
| Land | |||
| Property, Plant and Equipment [Line Items] | |||
| Property, Plant and Equipment, Gross | 48 | 48 | |
| Building and Leasehold Improvements | |||
| Property, Plant and Equipment [Line Items] | |||
| Property, Plant and Equipment, Gross | 879 | 851 | |
| Machinery and Equipment | |||
| Property, Plant and Equipment [Line Items] | |||
| Property, Plant and Equipment, Gross | $ 1,672 | $ 1,581 | |
SUPPLEMENTAL CASH FLOW INFORMATION - Standard Warranty (Details) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Oct. 31, 2025 |
Oct. 31, 2024 |
|
| Movement in Standard Product Warranty Accrual [Roll Forward] | ||
| Beginning balance | $ 31 | $ 36 |
| Accruals for warranties, including change in estimates | 25 | 22 |
| Settlements made during the period | (26) | (27) |
| Ending Balance | 30 | 31 |
| Standard Product Warranty Accrual, Balance Sheet Classification [Abstract] | ||
| Accruals for warranties due within one year | 19 | 19 |
| Accruals for warranties due after one year | 11 | 12 |
| Standard Product Warranty Accrual | $ (30) | $ (31) |
SUPPLEMENTAL FINANCIAL INFORMATION - Other current assets (Details) - USD ($) $ in Millions |
Oct. 31, 2025 |
Oct. 31, 2024 |
|---|---|---|
| Prepaid Expense and Other Assets, Current [Abstract] | ||
| Prepaid expenses | $ 285 | $ 287 |
| Tax receivables | 35 | 138 |
| Other Assets, Current | 166 | 157 |
| Prepaid Expense and Other Assets, Current | 486 | 582 |
| Advances to contract manufacturers | $ 176 | $ 200 |
SUPPLEMENTAL FINANCIAL INFORMATION - Total Other Assets (Details) - USD ($) $ in Millions |
Oct. 31, 2025 |
Oct. 31, 2024 |
|---|---|---|
| Other Assets [Abstract] | ||
| Assets for Plan Benefits, Defined Benefit Plan | $ 408 | $ 324 |
| Tax receivables - non current | 111 | 111 |
| Other Assets, Miscellaneous, Noncurrent | 91 | 86 |
| Other Assets, Noncurrent | $ 610 | $ 521 |
COMMITMENTS AND CONTINGENCIES Purchase commitments (Details) $ in Millions |
12 Months Ended |
|---|---|
|
Oct. 31, 2025
USD ($)
| |
| Commitments and Contingencies Disclosure [Abstract] | |
| Unrecorded Unconditional Purchase Obligation, Description | Commitments to contract manufacturers and suppliers. We purchase components from a variety of suppliers and use several contract manufacturers to provide manufacturing services for our products. During the normal course of business, we enter into agreements with contract manufacturers and suppliers that allow them to procure inventory based on mutually agreed criteria. |
| Unrecorded Unconditional Purchase Obligation | $ 450 |
| Other Commitments, Description | Other purchase commitments. Other purchase commitments primarily relate to software as a service and other professional services contracts. |
| Other Commitment | $ 111 |
| Long-Term Purchase Commitment, Description | We also have long-term power purchase agreements to purchase power at predominantly variable prices. These agreements are expected to support our power consumption needs with more favorable pricing and reliability than our previous supply agreements. |
| Gain Contingency, Description | On January 23, 2025, we filed a lawsuit against the United States of America in the United States Court of Federal Claims seeking a tax refund of $107 million, or such greater amount allowed by law, plus any other amount, including interest and cost, allowed by law. We intend to vigorously defend our position. The outcome cannot be predicted with certainty. If we are ultimately unsuccessful in defending our refund claim, we will be required to reverse the benefit previously recorded, most likely resulting in a material increase in the effective tax rate and income tax liability. |
| Contingent tax refund claim | $ 107 |
| Loss Contingency, Lawsuit Filing Date | Jan. 01, 2022 |
| Loss Contingency, Name of Plaintiff | Centripetal Networks |
| Loss Contingency, Name of Defendant | Keysight |
| Loss Contingency, Allegations | products infringe certain of Centripetal’s patents. |
| Loss Contingency, Actions Taken by Defendant | We challenged the validity of claims of eight of these patents at the U.S. Patent and Trademark Office, with all or most claims being found invalid in each patent. Centripetal is appealing seven of these results. In addition, in February 2022, Centripetal filed complaints in Germany alleging infringement of three of Centripetal’s German patents. Keysight challenged the validity of the claims of these patents in German nullity or European Patent Office (“EPO”) opposition procedures. Two of the three patents were invalidated, and the appeals process has ended. The third patent had all but one claim invalidated at trial and is under appeal. In April 2022, Centripetal filed a complaint with the International Trade Commission (“ITC”) requesting that they investigate whether Keysight violated Section 337 of the Tariff Act (“Section 337”) and should be enjoined from importing certain products that are manufactured outside of the U.S. and which are alleged to infringe Centripetal patents. On December 5, 2023, the ITC issued its Notice of Determination that Keysight did not unfairly import products in violation of Section 337 and the investigation was terminated. Centripetal has appealed this determination. The lawsuit in Federal District Court in Virginia is stayed pending the finalization of appeals of the ITC findings and validity challenges. On August 21, 2024, Keysight was served in Germany with a complaint filed in the Unified Patent Court alleging that certain Keysight products sold in Germany, France, Italy and the Netherlands infringe a European Centripetal patent. |
| Loss Contingency, Actions Taken by Court, Arbitrator or Mediator | In December 2025, the court issued its written determination that Keysight did not infringe the patent. Keysight also challenged the validity of the patent using EPO opposition procedures, and the EPO revoked the patent in its hearing in November 2025. We deny the allegations and are aggressively defending each case. |
STOCKHOLDERS' EQUITY New Stock Repurchase Program (Details) - USD ($) $ in Millions |
Nov. 24, 2025 |
Oct. 31, 2025 |
Mar. 06, 2023 |
|---|---|---|---|
| Subsequent Event [Line Items] | |||
| Share Repurchase Program, Authorized, Amount | $ 1,500 | ||
| Share Repurchase Program, Remaining Authorized, Amount | $ 110 | ||
| Subsequent Event [Member] | |||
| Subsequent Event [Line Items] | |||
| Share Repurchase Program, Authorized, Amount | $ 1,500 |
STOCKHOLDERS' EQUITY (Stock Repurchase Program) (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Oct. 31, 2025 |
Oct. 31, 2024 |
Oct. 31, 2023 |
|
| Equity [Abstract] | |||
| Treasury Stock, Shares, Acquired | 2,389,253 | 2,974,967 | 4,913,548 |
| Repurchase of common stock (at cost) | $ (377) | $ (442) | $ (706) |
| Payments for Repurchase of Common Stock | 375 | 439 | 702 |
| Share Repurchase Program, Excise Tax | $ 2 | $ 3 | $ 4 |
STOCKHOLDERS' EQUITY (Components of Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Millions |
Oct. 31, 2025 |
Oct. 31, 2024 |
|---|---|---|
| Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] | ||
| Foreign currency translation, net of tax (expense) of $(63) and $(63) | $ (66) | $ (136) |
| Unrealized losses on defined benefit plans, net of tax benefit of $73 and $80 | (264) | (317) |
| Gains on derivative instruments, net of tax (expense) of $(21) and $(23) | 82 | 89 |
| Total accumulated other comprehensive loss | (248) | (364) |
| Accumulated other Comprehensive Income (Loss), Tax [Abstract] | ||
| Foreign currency translation, tax | 63 | 63 |
| Unrealized losses on defined benefit plans, tax | 73 | 80 |
| Unrealized gains (losses) on derivative instruments, tax | $ 21 | $ 23 |
SEGMENT INFORMATION (General) (Details) |
12 Months Ended |
|---|---|
Oct. 31, 2025 | |
| Segment Reporting [Abstract] | |
| Segment Reporting, CODM, Profit (Loss) Measure, How Used, Description | The CODM is regularly provided with and reviews segment revenues and segment income from operations to support decision-making, set strategic goals, allocate resources, and evaluate each segment’s progress against the company’s plan. The CODM also reviews and approves budgets, including capital expenditures, at the segment level. |
| Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration] | |
| Number of Reportable Segments | 2 |
| Segment Reporting, Additional Information about Entity's Reportable Segments | The Communications Solutions Group (“CSG”) serves customers spanning the global commercial communications and aerospace, defense, and government end markets. The group’s solutions consist of electronic design and test software, instrumentation, systems, and related services. These solutions are used in the design, simulation, validation, manufacturing, installation, and optimization of communication systems in wireless, wireline (data center networking), enterprise, and aerospace, defense, and government end markets. Our recent acquisition of Spirent adds wireless network test and assurance and positioning technology solutions to our portfolio, complementing our design, validation, and performance offerings to deliver end-to-end solutions to our customers.The Electronic Industrial Solutions Group (“EISG”) serves customers across a diverse set of end markets focused on automotive and energy, semiconductor solutions, and general electronics. The group's solutions consist of electronic design, test and simulation software, instrumentation, systems, computer-aided engineering solutions, and related services. These solutions are used in the design, simulation, validation, manufacturing, installation, and optimization of electronic equipment. |
| Segment Reporting, Expense Information Used by CODM, Description | A significant portion of the segments’ expenses arise from allocated corporate charges, as well as expenses related to our centralized sales force, and service, marketing and technology functions that we have historically provided to the segments in order to realize economies of scale and to efficiently use resources. |
SEGMENT INFORMATION (Segment Assets to Total Assets Recon) (Details) - USD ($) $ in Millions |
Oct. 31, 2025 |
Oct. 31, 2024 |
|---|---|---|
| Segment Reporting [Abstract] | ||
| Total reportable segments’ assets | $ 9,668 | $ 7,673 |
| Cash and cash equivalents | 1,873 | 1,796 |
| Long-term deferred tax assets | 373 | 378 |
| Tax receivables | 146 | 249 |
| Long-term investments | 211 | 110 |
| Finite-Lived Intangible Assets, Accumulated Amortization | (1,614) | (1,477) |
| Pension and other assets | 644 | 540 |
| Total assets | $ 11,301 | $ 9,269 |
SEGMENT INFORMATION (Entity-Wide Disclosures on Geographic Areas) (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Oct. 31, 2025 |
Oct. 31, 2024 |
Oct. 31, 2023 |
|
| Revenues from External Customers and Long-Lived Assets [Line Items] | |||
| Total net revenue | $ 5,375 | $ 4,979 | $ 5,464 |
| Long-lived assets: | 1,664 | 1,456 | |
| UNITED STATES | |||
| Revenues from External Customers and Long-Lived Assets [Line Items] | |||
| Total net revenue | 1,869 | 1,769 | 1,928 |
| Long-lived assets: | 873 | 726 | |
| China [Member] | |||
| Revenues from External Customers and Long-Lived Assets [Line Items] | |||
| Total net revenue | 938 | 884 | 1,005 |
| Japan [Member] | |||
| Revenues from External Customers and Long-Lived Assets [Line Items] | |||
| Long-lived assets: | 293 | 261 | |
| GERMANY | |||
| Revenues from External Customers and Long-Lived Assets [Line Items] | |||
| Long-lived assets: | 183 | 131 | |
| Rest of the World [Member] | |||
| Revenues from External Customers and Long-Lived Assets [Line Items] | |||
| Total net revenue | 2,568 | 2,326 | $ 2,531 |
| Long-lived assets: | $ 315 | $ 338 | |
Subsequent Events (Details) - USD ($) $ in Millions |
12 Months Ended | |||
|---|---|---|---|---|
Nov. 03, 2023 |
Oct. 31, 2025 |
Oct. 31, 2024 |
Oct. 31, 2023 |
|
| Subsequent Event [Line Items] | ||||
| Payments to Acquire Businesses, Net of Cash Acquired | $ 2,022 | $ 681 | $ 85 | |
| Restricted Cash and Cash Equivalent, Current | $ 15 | $ 0 | ||
| ESI Group SA | ||||
| Subsequent Event [Line Items] | ||||
| Payments to Acquire Businesses, Net of Cash Acquired | $ 477 | |||
SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) - SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset [Member] - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Oct. 31, 2025 |
Oct. 31, 2024 |
Oct. 31, 2023 |
|
| SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] | |||
| Balance at Beginning of Period | $ 218 | $ 218 | $ 224 |
| Additions Charged to Expenses or Other Accounts* | 287 | 2 | 4 |
| Deductions Credited to Expenses or Other Accounts** | (8) | (2) | (10) |
| Balance at End of Period | $ 497 | $ 218 | $ 218 |