ARTHUR J. GALLAGHER & CO., 10-K filed on 2/17/2026
Annual Report
v3.25.4
Cover Page - USD ($)
shares in Millions, $ in Millions
12 Months Ended
Dec. 31, 2025
Jan. 31, 2026
Jun. 30, 2025
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Current Fiscal Year End Date --12-31    
Document Period End Date Dec. 31, 2025    
Document Transition Report false    
Entity File Number 1-09761    
Entity Registrant Name ARTHUR J. GALLAGHER & CO.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 36-2151613    
Entity Address, Address Line One 2850 Golf Road    
Entity Address, City or Town Rolling Meadows    
Entity Address, State or Province IL    
Entity Address, Postal Zip Code 60008-4050    
City Area Code 630    
Local Phone Number 773-3800    
Title of 12(b) Security Common Stock, par value $1.00 per share    
Trading Symbol AJG    
Security Exchange Name NYSE    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 71,117
Entity Common Stock, Shares Outstanding   257.1  
Documents Incorporated by Reference Portions of Arthur J. Gallagher & Co.’s definitive 2026 Proxy Statement are incorporated by reference into this Form 10‑K in response to Part III to the extent described herein.    
Document Fiscal Year Focus 2025    
Document Fiscal Period Focus FY    
Amendment Flag false    
Entity Central Index Key 0000354190    
v3.25.4
Audit Information
12 Months Ended
Dec. 31, 2025
Audit Information [Abstract]  
Auditor Name Ernst & Young LLP
Auditor Location Chicago, Illinois
Auditor Firm ID 42
v3.25.4
Consolidated Statement of Earnings - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Revenues before reimbursements $ 13,778 $ 11,401 $ 9,927
Reimbursements 164 154 145
Total revenues 13,942 11,555 10,072
Compensation 7,842 6,522 5,681
Operating 2,258 1,754 1,689
Reimbursements 164 154 145
Interest 639 381 297
Depreciation 206 178 165
Amortization 916 665 532
Change in estimated acquisition earnout payables 46 26 378
Total expenses 12,071 9,680 8,887
Total earnings before income taxes 1,871 1,875 1,185
Provision for income taxes 368 404 219
Net earnings 1,503 1,471 966
Net earnings (loss) attributable to noncontrolling interests 9 8 (4)
Net earnings attributable to controlling interests $ 1,494 $ 1,463 $ 970
Basic net earnings per share (in dollars per share) $ 5.83 $ 6.63 $ 4.51
Diluted net earnings per share (in dollars per share) 5.74 6.50 4.42
Dividends declared per common share (in dollars per share) $ 2.60 $ 2.40 $ 2.20
Commissions      
Revenues before reimbursements $ 8,024 $ 6,694 $ 5,865
Fees      
Revenues before reimbursements 4,195 3,607 3,145
Supplemental revenues      
Revenues before reimbursements 466 359 314
Contingent revenues      
Revenues before reimbursements 324 268 235
Interest income, premium finance revenues and other income      
Revenues before reimbursements $ 769 $ 473 $ 368
v3.25.4
Consolidated Statement of Comprehensive Earnings - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Statement of Comprehensive Income [Abstract]      
Net earnings $ 1,503 $ 1,471 $ 966
Change in pension liability, net of taxes 0 14 12
Foreign currency translation, net of taxes 630 (365) 258
Change in fair value of derivative instruments, net of taxes (4) (8) 78
Comprehensive earnings 2,129 1,112 1,314
Comprehensive earnings (loss) attributable to noncontrolling interests 9 8 (3)
Comprehensive earnings attributable to controlling interests $ 2,120 $ 1,104 $ 1,317
v3.25.4
Consolidated Balance Sheet - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Statement of Financial Position [Abstract]    
Cash and cash equivalents $ 1,396 $ 14,987
Fiduciary assets (includes fiduciary cash of $7,142 in 2025 and $5,481 in 2024) 26,899 24,712
Accounts receivable, net 5,175 3,896
Other current assets 886 518
Total current assets 34,356 44,113
Fixed assets - net 789 650
Deferred income taxes (includes tax credit carryforwards of $772 in 2024) 43 959
Other noncurrent assets 1,602 1,355
Right-of-use assets 598 378
Goodwill - net 22,593 12,270
Amortizable intangible assets - net 10,684 4,530
Total assets 70,665 64,255
Fiduciary liabilities 26,899 24,712
Accrued compensation and other current liabilities 4,017 3,586
Deferred revenue - current 737 537
Premium financing debt 226 225
Corporate related borrowings - current 640 200
Total current liabilities 32,519 29,260
Corporate related borrowings - noncurrent 12,104 12,732
Deferred revenue - noncurrent 155 67
Lease liabilities - noncurrent 515 328
Other noncurrent liabilities (includes tax credit carryforwards of $713 in 2025) 2,025 1,688
Total liabilities 47,318 44,075
Stockholders' equity:    
Common stock - authorized 400 shares; issued and outstanding 257 shares in 2025 and 250 shares in 2024 257 250
Capital in excess of par value 17,783 16,069
Retained earnings 5,806 4,986
Accumulated other comprehensive loss (525) (1,151)
Stockholders' equity attributable to controlling interests 23,321 20,154
Stockholders' equity attributable to noncontrolling interests 26 26
Total stockholders' equity 23,347 20,180
Total liabilities and stockholders' equity $ 70,665 $ 64,255
v3.25.4
Consolidated Balance Sheet (Parenthetical) - USD ($)
shares in Millions, $ in Millions
Dec. 31, 2025
Dec. 31, 2024
Statement of Financial Position [Abstract]    
Fiduciary cash $ 7,142 $ 5,481
Deferred income tax credit carryforwards $ 713 $ 772
Common stock - authorized shares (in shares) 400 400
Common stock - issued shares (in shares) 257 250
Common stock - outstanding shares (in shares) 257 250
v3.25.4
Consolidated Statement of Cash Flows - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Cash flows from operating activities:      
Net earnings $ 1,503 $ 1,471 $ 966
Adjustments to reconcile net earnings to net cash provided by operating activities:      
Net gain on investments and other (23) (23) (8)
Depreciation and amortization 1,122 843 697
Change in estimated acquisition earnout payables 46 26 378
Amortization of deferred compensation and restricted stock 148 117 105
Stock-based and other noncash compensation expense 49 42 31
Payments on acquisition earnouts in excess of original estimates (491) (43) (68)
Provision for deferred income taxes 61 109 43
Effect of changes in foreign exchange rates 54 0 10
Net change in accounts receivable, net (278) (65) (504)
Net change in deferred revenue (56) (116) 49
Net change in other current assets (218) (114) (107)
Net change in accrued compensation and other accrued liabilities 112 363 463
Net change in income taxes payable (60) (42) (78)
Net change in other noncurrent assets and liabilities (39) 15 55
Net cash provided by operating activities 1,930 2,583 2,032
Cash flows from investing activities:      
Capital expenditures (145) (142) (194)
Cash paid for acquisitions, net of cash and restricted cash acquired (15,766) (1,462) (3,042)
Net proceeds from sales of operations/books of business 17 20 10
Net funding of investment transactions 2 6 6
Net funding of premium finance loans 16 (9) (73)
Net cash used by investing activities (15,876) (1,587) (3,293)
Cash flows from financing activities:      
Payments on acquisition earnouts (442) (143) (98)
Proceeds from issuance of common stock 1,499 8,507 120
Payments to noncontrolling interests (5) (4) (2)
Dividends paid (667) (525) (474)
Net change in fiduciary assets and liabilities 1,531 (1) 1,297
Net borrowings on premium financing debt facility (15) (41) 42
Borrowings on line of credit facility 2,546 1,663 3,795
Repayments on line of credit facility (2,546) (1,907) (3,610)
Net borrowings of corporate related long-term debt (197) 5,552 1,634
Debt acquisition costs 9 (52) (18)
Settlements on terminated interest rate swaps 0 3 188
Net cash provided by financing activities 1,713 13,052 2,874
Effect of changes in foreign exchange rates on cash, cash equivalents, restricted cash and fiduciary cash 303 (123) (34)
Net (decrease) increase in cash, cash equivalents, restricted cash and fiduciary cash (11,930) 13,925 1,579
Cash, cash equivalents, restricted cash and fiduciary cash at beginning of year 20,468 6,543 4,964
Cash, cash equivalents, restricted cash and fiduciary cash at end of year $ 8,538 $ 20,468 $ 6,543
v3.25.4
Consolidated Statement of Stockholders' Equity - USD ($)
shares in Millions, $ in Millions
Total
Common Stock
Capital in Excess of Par Value
Retained Earnings
Accumulated Other Comprehensive Loss
Noncontrolling Interests
Beginning balance at Dec. 31, 2022 $ 9,190.0 $ 211.9 $ 6,510.0 $ 3,562.0 $ (1,140.0) $ 46.0
Beginning balance (in shares) at Dec. 31, 2022   211.9        
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net earnings 966.0     970.0   (4.0)
Net purchase of subsidiary shares from noncontrolling interests (3.0)         (3.0)
Dividends paid to noncontrolling interests (1.0)         (1.0)
Net change in pension asset/liability, net of taxes 12.0       12.0  
Foreign currency translation 259.0       258.0 1.0
Change in fair value of derivative instruments, net of taxes 78.0       78.0  
Compensation expense related to stock option plan grants 34.0   34.0      
Common stock issued in:            
Purchase transactions 526.0 $ 2.5 523.0      
Purchase transactions (in shares)   2.5        
Stock option plans 65.0 $ 1.2 64.0      
Stock option plans (in shares)   1.2        
Employee stock purchase plan 55.0 $ 0.3 55.0      
Employee stock purchase plan (in shares)   0.3        
Shares issued to benefit plans 84.0 $ 0.4 84.0      
Shares issued to benefit plans (in shares)   0.4        
Deferred compensation and restricted stock 28.0 $ 0.4 28.0      
Deferred compensation and restricted (in shares)   0.4        
Cash dividends declared on common stock (479.0)     (479.0)    
Ending balance at Dec. 31, 2023 10,815.0 $ 216.7 7,298.0 4,053.0 (792.0) 39.0
Ending balance (in shares) at Dec. 31, 2023   216.7        
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net earnings 1,471.0     1,463.0   8.0
Net purchase of subsidiary shares from noncontrolling interests (18.0)         (18.0)
Dividends paid to noncontrolling interests (3.0)         (3.0)
Net change in pension asset/liability, net of taxes 14.0       14.0  
Foreign currency translation (365.0)       (365.0)  
Change in fair value of derivative instruments, net of taxes (8.0)       (8.0)  
Compensation expense related to stock option plan grants 48.0   48.0      
Common stock issued in:            
Purchase transactions 141.0 $ 0.6 140.0      
Purchase transactions (in shares)   0.6        
Stock option plans $ 92.0 $ 1.3 91.0      
Stock option plans (in shares) 1.4 1.3        
Employee stock purchase plan $ 70.0 $ 0.3 70.0      
Employee stock purchase plan (in shares)   0.3        
Shares issued to benefit plans 98.0 $ 0.4 98.0      
Shares issued to benefit plans (in shares)   0.4        
Deferred compensation and restricted stock 10.0 $ 0.3 10.0      
Deferred compensation and restricted (in shares)   0.3        
Stock issuance from public offering 8,344.0 $ 30.4 8,314.0      
Stock issuance from public offering (in shares)   30.4        
Cash dividends declared on common stock (530.0)     (530.0)    
Ending balance at Dec. 31, 2024 $ 20,180.0 $ 250.0 16,069.0 4,986.0 (1,151.0) 26.0
Ending balance (in shares) at Dec. 31, 2024 250.0 250.0        
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net earnings $ 1,503.0     1,494.0   9.0
Net purchase of subsidiary shares from noncontrolling interests (2.0)         (2.0)
Dividends paid to noncontrolling interests (7.0)         (7.0)
Net change in pension asset/liability, net of taxes 0.0          
Foreign currency translation 630.0       630.0 0.0
Change in fair value of derivative instruments, net of taxes (4.0)       (4.0)  
Compensation expense related to stock option plan grants 54.0   54.0      
Common stock issued in:            
Purchase transactions 30.0 $ 0.1 30.0      
Purchase transactions (in shares)   0.1        
Stock option plans $ 112.0 $ 1.2 111.0      
Stock option plans (in shares) 1.2 1.2        
Employee stock purchase plan $ 80.0 $ 0.3 80.0      
Employee stock purchase plan (in shares)   0.3        
Shares issued to benefit plans 119.0 $ 0.3 119.0      
Shares issued to benefit plans (in shares)   0.3        
Deferred compensation and restricted stock 73.0 $ 0.5 72.0      
Deferred compensation and restricted (in shares)   0.5        
Stock issuance from public offering 1,253.0 $ 4.6 1,248.0      
Stock issuance from public offering (in shares)   4.6        
Cash dividends declared on common stock (674.0)     (674.0)    
Ending balance at Dec. 31, 2025 $ 23,347.0 $ 257.0 $ 17,783.0 $ 5,806.0 $ (525.0) $ 26.0
Ending balance (in shares) at Dec. 31, 2025 257.0 257.0        
v3.25.4
Consolidated Statement of Stockholders' Equity (Parenthetical)
$ in Millions
12 Months Ended
Dec. 31, 2025
USD ($)
acquisition
Dec. 31, 2024
USD ($)
acquisition
Dec. 31, 2023
USD ($)
acquisition
Statement of Stockholders' Equity [Abstract]      
Tax effect on net change in pension asset/liability   $ 3 $ 3
Net change in fair value of derivative instruments, tax $ 1 $ (3) $ 27
Number of purchase transactions | acquisition 5 13 23
v3.25.4
Summary of Significant Accounting Policies
12 Months Ended
Dec. 31, 2025
Accounting Policies [Abstract]  
Summary of Significant Accounting Policies Summary of Significant Accounting Policies
Terms Used in Notes to Consolidated Financial Statements
ASC - Accounting Standards Codification.
ASU - Accounting Standards Update.
FASB - The Financial Accounting Standards Board.
GAAP - United States (U.S.) generally accepted accounting principles.
IRC - Internal Revenue Code.
IRS - Internal Revenue Service.
Topic 606 - ASU No. 2014-09, Revenue from Contracts with Customers.
Underwriting enterprises - Insurance companies, reinsurance companies and various other forms of risk-taking entities, including intermediaries of underwriting enterprises.
Nature of Operations
Arthur J. Gallagher & Co. and its subsidiaries, collectively referred to herein as we, our, us or the Company, provide insurance brokerage, consulting and third party claims settlement and administration services to both domestic and international entities. We have three reportable segments: brokerage, risk management and corporate. Our brokers, agents and administrators act as intermediaries between underwriting enterprises and our clients.
Our brokerage segment operations provide brokerage and consulting services to entities of all types, including commercial, nonprofit, public sector entities and to a lesser extent, individuals, in the areas of insurance and reinsurance placements, risk of loss management and management of employer sponsored benefit programs. Our risk management segment operations provide contract claim settlement, claim administration, loss control services and risk management consulting for commercial, nonprofit, captive and public sector entities, and various other organizations that choose to self-insure property/casualty coverages or choose to use a third-party claims management organization rather than the claim services provided by underwriting enterprises. The corporate segment reports the financial information related to our debt, external acquisition‑related expenses, other corporate costs, the impact of foreign currency translation and clean energy investments.
We do not assume underwriting risk on a net basis, other than with respect to de minimis amounts necessary to provide minimum or regulatory capital insurance to organize captives, pools, specialized underwriters or risk-retention groups. Rather, capital necessary for covering losses is provided by underwriting enterprises.
Investment income and other revenues are primarily generated from our premium financing operations, our invested cash and restricted cash we hold on behalf of our clients, as well as clean energy investments. In addition, our share of the net earnings related to partially owned entities that are accounted for using the equity method is included in investment income.
Arthur J. Gallagher & Co., a global insurance brokerage, risk management and consulting services firm, is headquartered in Rolling Meadows, Illinois. The Company provides these services in approximately 130 countries around the world through its owned operations and a network of correspondent brokers and consultants.
Basis of Presentation
The accompanying consolidated financial statements include our accounts and all of our majority-owned subsidiaries (50% or greater ownership). Substantially all of our investments in partially owned entities in which our ownership is less than 50% are accounted for using the equity method based on the legal form of our ownership interest and the applicable ownership percentage of the entity. However, in situations where a less than 50%-owned investment has been determined to be a variable interest entity and we are deemed to be the primary beneficiary in accordance with the variable interest model of consolidation, we will consolidate the investment into our consolidated financial statements. For partially owned entities accounted for using the equity method, our share of the net earnings of these entities is included in consolidated net earnings. All material intercompany accounts and transactions have been eliminated in consolidation.
In the preparation of our consolidated financial statements as of December 31, 2025, management evaluated all material subsequent events or transactions that occurred after the balance sheet date through the date on which the financial statements were issued for potential recognition and/or disclosure in the notes therein.
Use of Estimates
The preparation of our consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. These accounting principles require us to make estimates and assumptions that affect the reported amounts of assets and liabilities and revenues and expenses, and the disclosure of contingent assets and liabilities at the date of our consolidated financial statements. We periodically evaluate our estimates and assumptions, including those relating to the valuation of goodwill and other intangible assets, right-of-use assets, investments, income taxes, revenue recognition, deferred costs, stock-based compensation, claims handling obligations, retirement plans, litigation and contingencies. We base our estimates on historical experience and various assumptions that we believe to be reasonable based on specific circumstances. Such estimates and assumptions could change in the future as more information becomes known, which could impact the amounts reported and disclosed herein.
Revenue Recognition
Our revenues are derived from commissions and fees as primarily specified in a written contract, or unwritten business understanding, with our clients or underwriting enterprises. We also recognize investment income over time from our invested assets and invested assets we hold on behalf of our clients or underwriting enterprises.
BROKERAGE SEGMENT
Our brokerage segment generates revenues by:
Identifying, negotiating and placing all forms of insurance (or insurance-like) coverage, as well as providing data analytics, risk-shifting, risk-sharing and risk-mitigation consulting services, principally related to property/casualty, life, health, welfare and disability insurance. We also provide these services through, or in conjunction with, other unrelated agents and brokers, consultants and management advisors;
Identifying, negotiating and placing all forms of reinsurance coverage, as well as providing capital markets services, including acting as underwriter, with respect to insurance linked securities, weather derivatives, capital raising and selected merger and acquisition advisory activities;
Acting as an agent or broker for multiple underwriting enterprises by providing services such as sales, marketing, selecting, negotiating, underwriting, servicing and placing insurance coverage on their behalf;
Providing consulting services related to health and welfare benefits, voluntary benefits, executive benefits, compensation, retirement planning, institutional investment and fiduciary, actuarial, compliance, private insurance exchange, human resource technology, communications and benefits administration; and
Providing management and administrative services to captives, pools, risk-retention groups, healthcare exchanges, small underwriting enterprises, such as accounting, claims and loss
processing assistance, feasibility studies, actuarial studies, data analytics and other administrative services.
The vast majority of our brokerage contracts and service understandings are for a period of one year or less.
Commissions and fees
The primary source of revenues for our brokerage services is commissions from underwriting enterprises, based on a percentage of premiums paid by our clients, or fees received from clients based on an agreed level of service usually in lieu of commissions. These commissions and fees revenues are substantially recognized at a point in time on the effective date of the associated policies when control of the policy transfers to the client, as well as deferring certain revenues to reflect delivery of services over the contract period.
Commissions are fixed at the contract effective date and generally are based on a percentage of premiums for insurance coverage or employee headcount for employer sponsored benefit plans. Commissions depend upon a large number of factors, including the type of risk being placed, the particular underwriting enterprise’s demand, the expected loss experience of the particular risk of coverage, and historical benchmarks surrounding the level of effort necessary for us to place and service the insurance contract. Rather than being tied to the amount of premiums, fees are most often based on an expected level of effort to provide our services.
Whether we are paid a commission or a fee, the vast majority of our services are associated with the placement of an insurance (or insurance-like) contract. Accordingly, we recognize approximately 85% of our commission and fee revenues on the effective date of the underlying insurance contract. The amount of revenue we recognize is based on our costs to provide our services up and through that effective date, including an appropriate estimate of our profit margin on a portfolio basis (a practical expedient as defined in Topic 606). Based on the proportion of additional services we provide in each period after the effective date of the insurance contract, including an appropriate estimate of our profit margin, we recognize approximately 10% of our commission and fee revenues in the first three months, and the remaining 5% thereafter. These periods may be different than the underlying premium payment patterns of the insurance contracts, but the vast majority of our services are fully provided within one year of the insurance contract effective date.
For consulting and advisory services, we recognize our revenue in the period in which we provide the service or advice. For management and administrative services, our revenue is recognized ratably over the contract period consistent with the performance of our obligations, mostly over an annual term.
Supplemental revenues
Certain underwriting enterprises may pay us additional revenues for the volume of premium placed with them and for insights into our sales pipeline, our sales capabilities or our risk selection knowledge. These amounts are in excess of the commission and fee revenues discussed above, and not all business we place with underwriting enterprises is eligible for supplemental revenues. Unlike contingent revenues, discussed below, these revenues are primarily a fixed amount or fixed percentage of premium of the underlying eligible insurance contracts. For supplemental revenue contracts based on a fixed percentage of premium, our obligation to the underwriting enterprise is substantially completed upon the effective date of the underlying insurance contract and revenue is fully earned at that time. For supplemental revenue contracts based on a fixed amount, revenue is recognized ratably over the contract period consistent with the performance of our obligations, almost always over an annual term. We receive these revenues on a quarterly or annual basis.
Contingent revenues
Certain underwriting enterprises may pay us additional revenues for our sales capabilities, our risk selection knowledge, or our administrative efficiencies. These amounts are in excess of the commission or fee revenues discussed above, and not all business we place with participating underwriting enterprises is eligible for contingent revenues. Unlike supplemental revenues, also discussed above, these revenues are variable, generally based on growth, the loss experience of the underlying insurance contracts, and/or our efficiency in processing the business. We generally operate under calendar year contracts, but we do not receive these revenues from the underwriting enterprises until the following calendar year, generally in the first and second quarters, after verification of the performance indicators outlined in the contracts. Accordingly, during each reporting period, we must make our best estimate of amounts we have earned using historical averages and other factors to project such revenues. We base our estimates each period on a contract-by-contract basis where available. In certain cases, it is impractical to assess a very large number of smaller contingent revenue contracts, so
we use a historical portfolio estimate in aggregate (a practical expedient as defined in Topic 606). Because our expectation of the ultimate contingent revenue amounts to be earned can vary from period to period, especially in contracts sensitive to loss ratios, our estimates might change significantly from quarter to quarter. For example, in circumstances where our revenues are dependent on a full calendar year loss ratio, adverse loss experience in the fourth quarter could not only negate revenue earnings in the fourth quarter, but also trigger the need to reverse revenues previously recognized during the prior quarters. Variable consideration is recognized when we conclude, based on all the facts and information available at the reporting date, that it is probable that a significant revenue reversal will not occur in future periods.
Sub-brokerage costs
Sub-brokerage costs are excluded from our gross revenues in our determination of total revenues. Sub-brokerage costs represent commissions paid to sub-brokers related to the placement of certain business by our brokerage segment operations. We recognize this contra revenue in the same manner as the commission revenue to which it relates.
RISK MANAGEMENT SEGMENT
Revenues for our risk management segment are comprised of fees generally negotiated (i) on a per-claim or per-service basis, (ii) on a cost‑plus basis, or (iii) as performance-based fees. We also provide risk management consulting services that are recognized as the services are delivered.
Per-claim or per-service fees
Where we operate under a contract with our fee established on a per-claim or per-service basis, our obligation is to process claims for a term specified within the contract. Because it is impractical to recognize our revenues on an individual claim-by-claim basis, we recognize revenue plus an appropriate estimate of our profit margin on a portfolio basis by grouping claims with similar characteristics (a practical expedient as defined in Topic 606). We apply actuarially-determined, historical-based patterns to determine our future service obligations, without applying a present value discount.
Cost-plus fees
Where we provide services and generate revenues on a cost-plus basis, we recognize revenue over the contract period consistent with the performance of our obligations.
Performance-based fees
Certain clients pay us additional fee revenues for our efficiency in managing claims or on the basis of claim outcome effectiveness. These amounts are in excess of the fee revenues discussed above. These revenues are variable, generally based on performance metrics set forth in the underlying contracts. We generally operate under multi-year contracts with fiscal year measurement periods. We do not receive these fees, if earned, until the following year after verification of the performance metrics outlined in the contracts. Each period we base our estimates on a contract-by-contract basis. We must make our best estimate of amounts we have earned using historical averages and other factors to project such revenues. Variable consideration is recognized when we conclude that it is probable that a significant revenue reversal will not occur in future periods.
Reimbursements
Reimbursements represent amounts received from clients reimbursing us for certain third-party costs associated with providing our claims management services. In certain service partner relationships, we are considered a principal because we direct the third party, control the specified service and combine the services provided into an integrated solution. Given this principal relationship, we are required to recognize revenue gross and service partner vendor fees in the operating expense in our consolidated statement of earnings.
Deferred Costs
We incur costs to provide brokerage and risk management services. Those costs are either (i) costs to obtain a contract or (ii) costs to fulfill such contract, or (iii) all other costs.
Costs to obtain - we incur costs to obtain a contract with a client. Those costs would not have been incurred if the contract had not been obtained. Almost all of
our costs to obtain are incurred prior to, or on, the effective date of the contract and consist primarily of incentive compensation we pay to our production employees. Our costs to obtain are expensed as incurred as described in Note 4 to these consolidated financial statements.
Costs to fulfill - we incur costs to fulfill a contract (or anticipated contract) with a client. Those costs are incurred prior to the effective date of the contract and relate to fulfilling our primary placement obligations to our clients. Our costs to fulfill prior to the effective date are capitalized and amortized on the effective date. These fulfillment activities include collecting underwriting information from our client, assessing their insurance needs and negotiating their placement with one or more underwriting enterprises. The majority of costs that we incur relate to compensation and benefits of our client service employees. Costs incurred during preplacement activities are expected to be recovered in the future. If the capitalized costs are no longer deemed to be recoverable, then they would be expensed.
Other costs that are not costs to obtain or fulfill are expensed as incurred. Examples include other operating costs such as rent, utilities, management costs, overhead costs, legal and other professional fees, technology costs, insurance related costs, communication and advertising, and travel and entertainment. Depreciation, amortization and change in estimated acquisition earnout payable are expensed as incurred.
Investment Income
Investment income primarily includes interest (including revenue from our premium financing operations) and dividend income, which is accrued as it is earned. Net gains on divestitures represent one-time gains related to sales of brokerage related businesses, which are primarily recognized on a cash received basis.
Earnings per Share
Basic net earnings per share is computed by dividing net earnings by the weighted average number of common shares outstanding during the reporting period. Diluted net earnings per share is computed by dividing net earnings by the weighted average number of common and common equivalent shares outstanding during the reporting period. Common equivalent shares include incremental shares from dilutive stock options, which are calculated from the date of grant under the treasury stock method using the average market price for the period.
Cash and Cash Equivalents
Short-term investments, consisting principally of cash and money market accounts that have average maturities of 90 days or less, are considered cash equivalents.
Fiduciary Assets and Liabilities
Fiduciary assets represent cash held and insurance and reinsurance receivables that relate to our clients and are held on their behalf. Fiduciary liabilities represent the corresponding amounts that are owed to underwriting enterprises on behalf of our clients. In our capacity as an insurance broker, we collect premiums from insureds and, after deducting our commissions and/or fees, remit these premiums to underwriting enterprises. We hold unremitted insurance premiums in a fiduciary capacity until we disburse them, and the use of such funds is restricted by laws in certain states and foreign jurisdictions in which our subsidiaries operate. Various state and foreign agencies regulate insurance brokers and provide specific requirements that limit the type of investments that may be made with such funds. Accordingly, we invest these funds in cash and U.S. Treasury fund accounts. We can earn interest income on these unremitted funds, which is included in investment income in the accompanying consolidated statement of earnings. These unremitted amounts are included in fiduciary assets in the accompanying consolidated balance sheet, with the related liability included in fiduciary liabilities. Additionally, several of our foreign subsidiaries are required by various foreign agencies to meet certain liquidity and solvency requirements. We were in compliance with these requirements at December 31, 2025. This restricted cash is included in cash and cash equivalents net in the accompanying consolidated balance sheet.
Related to our third party administration business and in certain of our brokerage operations, we are responsible for client claim funds that we hold in a fiduciary capacity. We do not earn any interest income on the funds held. These client funds have been included in fiduciary assets, along with a corresponding liability in fiduciary liabilities in the accompanying consolidated balance sheet.
Accounts Receivable
Accounts receivable, net in the accompanying consolidated balance sheet includes accrued agency billed commissions, fees, supplemental commissions, direct bill commissions and contingent commission receivables due to the Company. Accounts receivable are net of allowances for estimated policy cancellations and credit losses on trade receivables and accounts receivables. The allowance for estimated policy cancellations was $23 million and $13 million at December 31, 2025 and 2024, respectively, which represents a reserve for future reversals in commission and fee revenues related to the potential cancellation of client insurance policies that were in force as of each year end. The allowance for credit losses on trade receivables and accounts receivables was $49 million and $22 million at December 31, 2025 and 2024, respectively. We establish the allowance for estimated policy cancellations through a charge to revenues and the allowance for doubtful accounts through a charge to operating expenses. Both of these allowances are based on estimates and assumptions using historical data to project future experience. Such estimates and assumptions could change in the future as more information becomes known which could impact the amounts reported and disclosed herein. We periodically review the adequacy of these allowances and make adjustments as necessary.
Derivative Instruments
We are exposed to market risks, including changes in foreign currency exchange rates and interest rates. To manage the risk related to these exposures, we enter into various derivative instruments that reduce these risks by creating offsetting exposures. In the normal course of business, we are exposed to the impact of foreign currency fluctuations that impact our results of operations and cash flows. We utilize a foreign currency risk management program involving foreign currency derivatives that consist of several monthly put/call options designed to hedge a portion of our future foreign currency disbursements through various future payment dates. To mitigate the counterparty credit risk we only enter into contracts with major financial institutions based upon their credit ratings and other factors. These derivative instrument contracts are cash flow hedges that qualify for hedge accounting and primarily hedge against fluctuations between changes in the British pound and Indian Rupee versus the U.S. dollar. Changes in fair value of the derivative instruments are reflected in other comprehensive earnings in the accompanying consolidated balance sheet. The impact of the hedge at maturity is recognized in the income statement as a component of investment income, compensation and operating expenses depending on the nature of the hedged item. We enter into various long-term debt agreements. We use interest rate derivatives, typically swaps, to reduce our exposure to the effects of interest rate fluctuations on the forecasted interest rates for up to three years into the future. These derivative instrument contracts are periodically monitored for hedge ineffectiveness, the amount of which has not been material to the accompanying consolidated financial statements. We do not use derivatives for trading or speculative purposes.
Premium Financing
Seven subsidiaries of the brokerage segment make short-term loans (generally with terms of twelve months or less) to our clients to finance premiums. These premium financing contracts are structured to minimize potential bad debt expense to us. Such receivables are generally considered delinquent after seven days of the payment due date. In normal course, insurance policies are canceled within one month of the contractual payment due date if the payment remains delinquent. We recognize interest income as it is earned over the life of the contract using the “level-yield” method. Unearned interest related to contracts receivable is included in the receivable balance in the accompanying consolidated balance sheet. The outstanding loan receivable balance was $636 million and $616 million at December 31, 2025 and 2024, respectively.
Fixed Assets
We carry fixed assets at cost, less accumulated depreciation, in the accompanying consolidated balance sheet. We periodically review long-lived assets for impairment whenever events or changes in business circumstances indicate that the carrying value of the assets may not be recoverable. Under those circumstances, if the fair value were less than the carrying amount of the asset, we would recognize a loss for the difference. Depreciation for fixed assets is computed using the straight-line method over the following estimated useful lives:
Useful Life
Office equipment
Three to ten years
Furniture and fixtures
Two to ten years
Computer equipment
Three to five years
Building
Fifteen to forty years
Software
Three to five years
Leasehold improvementsShorter of the lease term or useful life of the asset
Intangible Assets
Intangible assets represent the excess of cost over the estimated fair value of net tangible assets of acquired businesses. Our primary intangible assets are classified as either goodwill, expiration lists, non-compete agreements or trade names. Expiration lists, non‑compete agreements and trade names are amortized using the straight-line method over their estimated useful lives (two to fifteen years for expiration lists, two to six years for non-compete agreements and two to fifteen years for trade names), while goodwill is not subject to amortization. The establishment of goodwill, expiration lists, non-compete agreements and trade names and the determination of estimated useful lives are primarily based on valuations we receive from qualified independent appraisers. The calculations of these amounts are based on estimates and assumptions using historical and projected financial information and recognized valuation methods. Different estimates or assumptions could produce different results. We carry identifiable intangible assets at cost, less accumulated amortization, in the accompanying consolidated balance sheet.
We review all of our intangible assets for impairment periodically (at least annually for goodwill) and whenever events or changes in business circumstances indicate that the carrying value of the assets may not be recoverable. We perform such impairment reviews at the division (i.e., reporting unit) level with respect to goodwill and at the business unit level for amortizable intangible assets. While goodwill is not amortizable, it is tested for impairment at least annually in the fourth quarter, and more frequently if there are indicators of impairment or whenever business circumstances suggest that the carrying value of goodwill may not be recoverable. We may initially perform a qualitative analysis to determine if it is more likely than not that the goodwill balance is impaired. If a qualitative assessment is not performed or if a determination is made that it is not more likely than not that the fair value of the reporting unit exceeds its carrying amount, then we will perform a quantitative analysis. The fair value of each reporting unit is compared to its carrying value. If the fair value of the reporting unit is less than its carrying value, a non-cash impairment charge is recognized for the amount by which the carrying value exceeds the reporting unit’s fair value with the loss not exceeding the total amount of goodwill allocated to that reporting unit. We completed our 2025 annual assessment in the fourth quarter and concluded goodwill was not impaired, as the fair value of each reporting unit exceeded its carrying value.
The carrying value of amortizable intangible assets attributable to each business or asset group is periodically reviewed by management to determine if there are events or changes in circumstances that would indicate that its carrying amount may not be recoverable. Accordingly, if there are any such changes in circumstances during the year, we assess the carrying value of the amortizable intangible assets by considering the estimated future undiscounted cash flows generated by the corresponding business or asset group. Any impairment identified through this assessment may require that the carrying value of related amortizable intangible assets be adjusted and charged against current period earnings as a component of amortization expense. Based on the results of impairment reviews in 2025, 2024 and 2023, we wrote off $66 million, $19 million and $4 million, respectively, of amortizable intangible assets primarily related to acquisitions (made prior to 2024) of our brokerage and risk management segments, which is included in amortization expense in the accompanying consolidated statement of earnings. The determinations of impairment indicators and fair value are based on estimates and assumptions related to the amount and timing of future cash flows and future interest rates. Such estimates and assumptions could change in the future as more information becomes known which could impact the amounts reported and disclosed herein.
Income Taxes
Our tax rate reflects the statutory tax rates applicable to our taxable earnings and tax planning in the various jurisdictions in which we operate. Significant judgment is required in determining the annual effective tax rate and in evaluating uncertain tax positions. We report a liability for unrecognized tax benefits resulting from uncertain tax positions taken or expected to be taken in our tax return. We evaluate our tax positions using a two-step process. The first step involves recognition. We determine whether it is more likely than not that a tax position will be sustained upon tax examination based solely on the
technical merits of the position. The technical merits of a tax position are derived from both statutory and judicial authority (legislation and statutes, legislative intent, regulations, rulings and case law) and their applicability to the facts and circumstances of the position. If a tax position does not meet the “more likely than not” recognition threshold, we do not recognize the benefit of that position in the financial statements. The second step is measurement. A tax position that meets the “more likely than not” recognition threshold is measured to determine the amount of benefit to recognize in the financial statements. The tax position is measured as the largest amount of benefit that has a likelihood of greater than 50% of being realized upon ultimate resolution with a taxing authority.
Uncertain tax positions are measured based upon the facts and circumstances that exist at each reporting period and involve significant management judgment. Subsequent changes in judgment based upon new information may lead to changes in recognition, derecognition and measurement. Adjustments may result, for example, upon resolution of an issue with the taxing authorities, or expiration of a statute of limitations barring an assessment for an issue. We recognize interest and penalties, if any, related to unrecognized tax benefits in our provision for income taxes.
Tax law requires certain items to be included in our tax returns at different times than such items are reflected in the financial statements. As a result, the annual tax expense reflected in our consolidated statements of earnings is different than that reported in our tax returns. Some of these differences are permanent, such as expenses that are not deductible in our tax returns, and some differences are temporary and reverse over time, such as depreciation expense and amortization expense deductible for income tax purposes. Temporary differences create deferred tax assets and liabilities. Deferred tax liabilities generally represent tax expense recognized in the financial statements for which a tax payment has been deferred, or expense which has been deducted in the tax return but has not yet been recognized in the financial statements. Deferred tax assets generally represent items that can be used as a tax deduction or credit in tax returns in future years for which a benefit has already been recorded in the financial statements.
We establish or adjust valuation allowances for deferred tax assets when we estimate that it is more likely than not that future taxable income will be insufficient to fully use a deduction or credit in a specific jurisdiction. In assessing the need for the recognition of a valuation allowance for deferred tax assets, we consider whether it is more likely than not that some portion, or all, of the deferred tax assets will not be realized and adjust the valuation allowance accordingly. We evaluate all significant available positive and negative evidence as part of our analysis. Negative evidence includes the existence of losses in recent years. Positive evidence includes the forecast of future taxable income by jurisdiction, tax-planning strategies that would result in the realization of deferred tax assets and the presence of taxable income in prior carryback years. The underlying assumptions we use in forecasting future taxable income require significant judgment and take into account our recent performance. Such estimates and assumptions could change in the future as more information becomes known which could impact the amounts reported and disclosed herein. The ultimate realization of deferred tax assets depends on the generation of future taxable income during the periods in which temporary differences are deductible or creditable.
Fair Value of Financial Instruments
Fair value accounting establishes a framework for measuring fair value, which is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (i.e., an exit price). This framework includes a fair value hierarchy that prioritizes the inputs to the valuation technique used to measure fair value.
The classification of a financial instrument within the valuation hierarchy is based upon the transparency of inputs to the valuation of an asset or liability on the measurement date. The three levels of the hierarchy in order of priority of inputs to the valuation technique are defined as follows:
Level 1 - Valuations are based on unadjusted quoted prices in active markets for identical financial instruments;
Level 2 - Valuations are based on quoted market prices, other than quoted prices included in Level 1, in markets that are not active or on inputs that are observable either directly or indirectly for the full term of the financial instrument; and
Level 3 - Valuations are based on pricing or valuation techniques that require inputs that are both unobservable and significant to the overall fair value measurement of the financial instrument. Such inputs may reflect management’s own assumptions about the assumptions a market participant would use in pricing the financial instrument.
The level in the fair value hierarchy within which the fair value measurement is classified is determined based on the lowest level input that is significant to the fair value measure in its entirety.
The carrying amounts of financial assets and liabilities reported in the accompanying consolidated balance sheet for cash and cash equivalents, fiduciary assets, accounts receivable, other current assets, fiduciary liabilities, accrued compensation and other accrued liabilities and deferred revenue - current, at December 31, 2025 and 2024, approximate fair value because of the short-term duration of these instruments. See Note 3 to these consolidated financial statements for the fair values related to the establishment of intangible assets and the establishment and adjustment of earnout payables. See Note 7 to these consolidated financial statements for the fair values related to borrowings outstanding at December 31, 2025 and 2024 under our debt agreements. See Note 12 to these consolidated financial statements for the fair values related to investments at December 31, 2025 and 2024 under our defined benefit pension plan.
Litigation
We are the defendant in various legal actions related to claims, lawsuits and proceedings incidental to the nature of our business. We record liabilities for loss contingencies, including legal costs (such as fees and expenses of external lawyers and other service providers) to be incurred, when it is probable that a liability has been incurred on or before the balance sheet date and the amount of the liability can be reasonably estimated. We do not discount such contingent liabilities. To the extent recovery of such losses and legal costs is probable under our insurance programs, we record estimated recoveries concurrently with the losses recognized. Significant management judgment is required to estimate the amounts of such contingent liabilities and the related insurance recoveries. In order to assess our potential liability, we analyze our litigation exposure based on available information, including consultation with outside counsel handling the defense of these matters. As these liabilities are uncertain by their nature, the recorded amounts may change due to a variety of different factors, including new developments in, or changes in approach, such as changing the settlement strategy as applicable to each matter.
Retention Bonus Arrangements
In connection with the hiring and retention of both new talent and experienced personnel, including our senior management, brokers and other key personnel, we have entered into various agreements with key employees setting up the conditions for the cash payment of certain retention bonuses. These bonuses are an incentive for these employees to remain with the Company, for a fixed period of time, to allow us to capitalize on their knowledge and experience. We have various forms of retention bonus arrangements; some are paid up front and some are paid at the end of the term, but all are contingent upon successfully completing a minimum period of employment. A retention bonus that is paid to an employee upfront that is contingent on a certain minimum period of employment, will be initially classified as a prepaid asset and amortized to compensation expense as the future services are rendered over the duration of the stay period. A retention bonus that is paid to an employee at the end of the term that is contingent on a certain minimum period of employment, will be accrued as a liability through compensation expense as the future services are rendered over the duration of the stay period. If an employee leaves prior to the required time frame to earn the retention bonus outright, then all or any portion that is ultimately unearned or refundable, and recovered by the Company if prepaid, is forfeited and reversed through compensation expense.
Stock-Based Compensation
We have several employee equity-settled and cash-settled share-based compensation plans. Equity-settled share-based payments to employees include grants of stock options, performance stock units and restricted stock units and are measured based on estimated grant date fair value. We have elected to use the Black-Scholes option pricing model to determine the fair value of stock options on the dates of grant. Performance stock units are measured on the probable outcome of the performance conditions applicable to each grant. Restricted stock units are measured based on the fair market values of the underlying stock on the dates of grant. Shares are issued on the vesting dates net of the minimum statutory tax withholding requirements, as applicable, to be paid by us on behalf of our employees. As a result, the actual number of shares issued will be fewer than the actual number of performance stock units and restricted stock units outstanding. Furthermore, we record the liability for withholding amounts to be paid by us as a reduction to additional paid-in capital when paid.
Cash-settled share-based payments to employees include awards under our Performance Unit Program and stock appreciation rights. The fair value of the amount payable to employees in respect of cash-settled share-based payments is recognized as compensation expense, with a corresponding increase in liabilities, over the vesting period. The liability is
remeasured at each reporting date and at settlement date. Any changes in fair value of the liability are recognized as compensation expense.
We recognize share-based compensation expense over the requisite service period for awards expected to ultimately vest. Forfeitures are estimated on the date of grant and revised if actual or expected forfeiture activity differs from original estimates.
Employee Stock Purchase Plan
We have an employee stock purchase plan (which we refer to as the ESPP), under which the sale of 8 million shares of our common stock has been authorized. Eligible employees may contribute up to 15% of their compensation towards the quarterly purchase of our common stock at a purchase price equal to 95% of the lesser of the fair market value of our common stock on the first business day or the last business day of the quarterly offering period. Eligible employees may annually purchase shares of our common stock with an aggregate fair market value of up to $25,000 (measured as of the first day of each quarterly offering period of each calendar year), provided that no employee may purchase more than 2,000 shares of our common stock under the ESPP during any calendar year. At December 31, 2025, 4.4 million shares of our common stock was reserved for future issuance under the ESPP.
Defined Benefit Pension Plans
We recognize in our consolidated balance sheet, an asset for our defined benefit pension plans’ overfunded status or a liability for our plans’ underfunded status. We recognize changes in the funded status of our defined benefit pension plans in comprehensive earnings in the year in which the changes occur. We use December 31 as the measurement date for our plans’ assets and benefit obligations. See Note 12 to these consolidated financial statements for additional information required to be disclosed related to our defined benefit pension plans.
v3.25.4
Effect of New Accounting Pronouncements
12 Months Ended
Dec. 31, 2025
Accounting Changes and Error Corrections [Abstract]  
Effect of New Accounting Pronouncements Effect of New Accounting Pronouncements
Income Taxes
In December 31, 2023, the FASB issued ASU No. 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures, which requires that an entity, on an annual basis, disclose additional income tax information, primarily related to the rate reconciliation and income taxes paid. The amendment in the ASU is intended to enhance the transparency and decision usefulness of income tax disclosures. We adopted this ASU as of December 31, 2025, which affected our income taxes disclosure. See Note 16 to these consolidated financial statements for further detail regarding the impact of this ASU.
Disaggregation of Income Statement Expenses
In November 2024, the FASB issued ASU 2024-03, Income Statement Reporting–Comprehensive Income–Expense Disaggregation Disclosures (Subtopic 220-40), Disaggregation of Income Statement Expenses. The standard update improves the disclosures about a public business entity’s expenses by requiring more detailed information about the types of expenses (including purchases of inventory, employee compensation, depreciation and amortization) included within income statement expense captions. The guidance will be effective for annual reporting periods beginning after December 15, 2026, and interim reporting periods beginning after December 15, 2027. Early adoption is permitted. The standard updates are to be applied prospectively with the option for retrospective application. We are currently evaluating the impact of adoption of the standard update on its financial statement disclosures.
Accounting for Internal-Use Software
In September 2025, the FASB issued ASU 2025-06, Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40): Targeted Improvements to the Accounting for Internal-Use Software, which amends the guidance in ASC 350-40. The amendments modernize the recognition and disclosure requirements for internal-use software costs, introducing a more judgment-based approach while removing the previous “development stage” model. The amendment in the ASU is effective for all entities for fiscal years beginning after December 15, 2027, and interim periods within those fiscal years, with early adoption permitted. Entities may apply the guidance using a prospective, retrospective or modified transition approach. We are currently evaluating the impact of adoption of the standard update on our financial statement disclosures.
v3.25.4
Business Combinations
12 Months Ended
Dec. 31, 2025
Business Combinations [Abstract]  
Business Combinations Business Combinations
During 2025, we acquired substantially all of the ownership interests or net assets, as applicable, of the following firms in exchange for our common stock and/or cash. These acquisitions have been accounted for using the acquisition method for recording business combinations (in millions, except share data):
Name and Effective Date of AcquisitionCommon
Shares
Issued
Common
Share
Value
Cash
Paid
Accrued
Liability
Escrow
Deposited
Recorded
Earnout
Payable
Total
Recorded
Purchase
Price
Maximum
Potential
Earnout
Payable
(000s)
W K Webster & Co Ltd
   February 1, 2025 (WKW)
$— $139 $$— $14 $155 $29 
Case Group
   February 26, 2025 (CSG)
— 58 14 81 84 
Woodruff Sawyer & Co
   April 10, 2025 (WSC)
— 1,195 12 67 — 1,274 — 
Dolphin TopCo, Inc., the holding company of AssuredPartners, Inc.,
      August 18, 2025 (APG)
— 13,515 — 300 — 13,815 — 
Tompkins Insurance
   Agencies, Inc.
      October 31, 2025 (TIA)
— 225 — — 233 — 
First Actuarial, LLP
   November 27, 2025 (FAC)
— 101 46 158 26 
Twenty-seven other acquisitions completed in 2025
6416 502 19 22 73 632 150 
64$16 $15,735 $48 $441 $108 $16,348 $289 
On August 18, 2025, we acquired all of the issued and outstanding stock of Dolphin TopCo, Inc., the holding company of AssuredPartners for gross consideration of $13.8 billion. AssuredPartners is a leading U.S. insurance broker with client capabilities across commercial property/casualty, specialty, employee benefits and personal lines with operations in the U.K. and Ireland. We raised $8.5 billion of cash raised in our December 11, 2024 follow-on common stock offering and $5.0 billion of cash in our December 19, 2024 senior notes issuance (which we refer to, together with the follow-on common stock offering, the "AssuredPartners Financing"), to fund the transaction. On January 7, 2025, we received an additional $1.3 billion of cash due to the exercise by the underwriters of the overallotment provision related to the follow-on common stock offering. AssuredPartners had over 10,900 employees serving through offices located across the U.S., U.K. and Ireland.
On April 10, 2025, we acquired all of the issued and outstanding stock of Woodruff Sawyer for consideration of $1.2 billion. We funded the transaction using cash on hand. Woodruff Sawyer provides a full suite of commercial property/casualty products, employee benefits solutions and risk management services with a focus on middle and large market clients. Immediately prior to closing, Woodruff Sawyer had over 600 employees serving clients through 14 U.S. offices and one U.K. office.
Common shares issued in connection with acquisitions are valued at closing market prices as of the effective date of the applicable acquisition or on the days when the shares are issued, if purchase consideration is deferred. We record escrow deposits that are returned to us as a result of adjustments to net assets acquired as reductions of goodwill when the escrows are settled. The maximum potential earnout payables disclosed in the foregoing table represent the maximum amount of additional consideration that could be paid pursuant to the terms of the purchase agreement for the applicable acquisition. The amounts recorded as earnout payables, which are primarily based upon the estimated future operating results of the acquired entities over a two- to three-year period subsequent to the acquisition date, are measured at fair value as of the acquisition date and are included on that basis in the recorded purchase price consideration in the foregoing table. We will record subsequent changes in these estimated earnout obligations, including the accretion of discount, in our consolidated statement of earnings when incurred.
The fair value of these earnout obligations is based on the present value of the expected future payments to be made to the sellers of the acquired entities in accordance with the provisions outlined in the respective purchase agreements, which is a Level 3 fair value measurement. In determining fair value, we estimated the acquired entity’s future performance using financial projections developed by management for the acquired entity and market participant assumptions that were derived for revenue growth and/or profitability. Revenue growth rates generally ranged from 5% to 18% for our 2025 acquisitions. We estimated future payments using the earnout formula and performance targets specified in each purchase agreement and the financial projections just described. We then discounted these payments to present value using a risk-adjusted rate that takes into consideration market‑based rates of return that reflect the ability of the acquired entity to achieve the targets. The discount rates generally ranged from 8% to 9% for our 2025 acquisitions. In some instances, the fair value of these earnout obligations can be based on other valuation methods including the Black-Scholes Option Pricing Method or Monte Carlo Simulation method. Changes in financial projections, market participant assumptions for revenue growth and/or profitability, or the risk-adjusted discount rate, would result in a change in the fair value of recorded earnout obligations.
During 2025, 2024 and 2023, we recognized $50 million, $62 million and $77 million respectively, of expense in our consolidated statement of earnings related to the accretion of the discount recorded for earnout obligations in connection with our acquisitions. In addition, during 2025, 2024 and 2023, we recognized $4 million of income, $36 million of income and $301 million of expense, respectively, related to net adjustments in the estimated fair value of the liability for earnout obligations in connection with revised assumptions due to changes in interest rates volatility and other assumptions and projections of future performance for 127, 91 and 80 acquisitions, respectively. The net adjustments during 2024, include changes made to the estimated fair value of the Willis Re acquisition earnout and reflect updated assumptions as of December 31, 2024. The aggregate amount of maximum earnout obligations related to acquisitions made in 2022 and subsequent years was $1,518 million as of December 31, 2025, of which $773 million was recorded in the consolidated balance sheet as of that date based on the estimated fair value of the expected future payments to be made, of which approximately $535 million can be settled in cash or common stock at our option and $238 million must be settled in cash. The aggregate amount of maximum earnout obligations related to acquisitions made in 2021 and subsequent years was $1,998 million as of December 31, 2024, of which $1,302 million was recorded in the consolidated balance sheet as of that date based on the estimated fair value of the expected future payments to be made, of which approximately $512 million can be settled in cash or common stock at our option and $790 million must be settled in cash.
The following is a summary of the estimated fair values of the net assets acquired at the date of each acquisition made in 2025 (in millions):
WKWCSGWSCAPGTIAFAC
Twenty-seven Other
Acquisitions
Total
Cash and cash equivalents$$$62 $276 $13 $$30 $400 
Fiduciary assets87 — 465 1,032 — 55 1,646 
Other current assets17 79 938 23 20 1,088 
Fixed assets13 134 — 154 
Noncurrent assets— 25 237 — 268 
Goodwill100 59 823 8,376 82 97 367 9,904 
Expiration lists54 25 459 5,993 135 47 307 7,020 
Non-compete agreements— — — — 10 19 
Trade names— 27 — — — 37 
Total assets acquired270 96 1,934 17,013 246 185 792 20,536 
Fiduciary liabilities87 — 465 1,032 — 55 1,646 
Current liabilities12 41 933 10 18 1,027 
Noncurrent liabilities16 154 1,233 — 17 87 1,515 
Total liabilities assumed115 15 660 3,198 13 27 160 4,188 
Total net assets acquired$155 $81 $1,274 $13,815 $233 $158 $632 $16,348 
Among other things, these acquisitions allow us to expand into desirable geographic locations, further extend our presence in the retail and wholesale insurance and reinsurance brokerage markets and increase the volume of general services
currently provided. The excess of the purchase price over the estimated fair value of the tangible net assets acquired at the acquisition date was allocated to goodwill, expiration lists, non-compete agreements and trade names in the amounts of $9,904 million, $7,020 million, $19 million and $37 million, respectively, within the brokerage and risk management segments.
The fair value of the tangible assets and liabilities for each applicable acquisition at the acquisition date approximated their carrying values. In general, the fair value of expiration lists was established using the excess earnings method, which is an income approach based on estimated financial projections developed by management for each acquired entity using market participant assumptions. Revenue growth and attrition rates generally ranged from 3% to 4% and 5% to 12% for our 2025 and 2024 acquisitions, respectively, for which valuations were performed in 2025. We estimate the fair value as the present value of the benefits anticipated from ownership of the subject expiration list in excess of returns required on the investment in contributory assets necessary to realize those benefits. The rate used to discount the net benefits was based on a risk-adjusted rate that takes into consideration market-based rates of return and reflects the risk of the asset relative to the acquired business. These discount rates generally ranged from 10% to 14% for our 2025 and 2024 acquisitions, for which valuations were performed in 2025. The fair value of non-compete agreements was established using the profit differential method, which is an income approach based on estimated financial projections developed by management for the acquired company using market participant assumptions and various non-compete scenarios.
Provisional estimates of fair value are established at the time of each acquisition and are subsequently reviewed and finalized within the first year of operations subsequent to the acquisition date to determine the necessity for adjustments. During this period, we may use independent third-party valuation specialists to assist us in finalizing the fair value of assets acquired and liabilities assumed. Fair value adjustments, if any, are most common to the values established for amortizable intangible assets, including expiration lists, non‑compete agreements, acquired software, and for earnout liabilities, with the offset to goodwill, net of any income tax effect. The allocation of the purchase price for AssuredPartners is preliminary, as we have not finalized the valuation of certain acquired identifiable intangible assets and net deferred tax balances. Accordingly, the goodwill recorded also represents a provisional estimate based on information available as of the acquisition date and updated through December 31, 2025. In order to determine the provisional estimates for the acquired identifiable intangible assets and goodwill as of the acquisition date, we applied an estimated allocation of purchase price less the value of net tangible assets acquired to the applicable reporting units. At the reporting unit level, we then applied an estimated allocation of the purchase price to acquired identifiable intangible assets. The estimated allocation was primarily based on preliminary information compiled by the independent third party valuation specialists, data from our prior independent acquisition valuations for similar businesses to AssuredPartners, data from AssuredPartners’ historical independent acquisition valuations, information obtained during our due diligence process and net working capital settlement information that occurred subsequent to the acquisition date that relates to facts and circumstances existing as of the acquisition date. We have engaged independent third-party valuation specialists to assist us in determining the fair value of assets acquired and liabilities assumed for this transaction. December 31, 2025, and as of the date of this filing, the specialists have not completed their analysis and thus these AssuredPartners fair value estimates are provisional. These provisional fair value estimates will be subsequently reviewed and adjusted based on the results of the final valuation analysis, which will be completed in 2026.
Expiration lists, non-compete agreements and trade names related to our acquisitions are amortized using the straight-line method over their estimated useful lives (two to fifteen years for expiration lists, two to six years for non-compete agreements and two to fifteen years for trade names), while goodwill is not subject to amortization. We use the straight-line method to amortize these intangible assets because the pattern of their economic benefits cannot be reasonably determined with any certainty. We review all of our identifiable intangible assets for impairment periodically (at least annually) and whenever events or changes in business circumstances indicate that the carrying value of the assets may not be recoverable. In reviewing identifiable intangible assets, if the undiscounted future cash flows were less than the carrying amount of the respective (or underlying) asset, an indicator of impairment would exist and further analysis would be required to determine whether or not a loss would need to be charged against current period earnings as a component of amortization expense.
Of the $7,020 million of expiration lists, $19 million of non-compete agreements and $37 million of trade names related to the 2025 acquisitions, $6,681 million, $11 million and $37 million, respectively, is not expected to be deductible for income tax purposes. Accordingly, we recorded a net deferred tax liability of $720 million, and a corresponding amount of goodwill, in 2025 related to the nondeductible amortizable intangible assets.
Our consolidated financial statements for the year ended December 31, 2025 include the operations of the acquired entities from their respective acquisition dates. The following is a summary of the unaudited pro forma historical results, as if these entities had been acquired at January 1, 2024 (in millions, except per share data):
Year Ended December 31,
20252024
Total revenues$16,256 $15,024 
Net earnings attributable to controlling interests1,623 1,474 
Basic net earnings per share6.34 5.81 
Diluted net earnings per share6.24 5.71 
The unaudited pro forma results above have been prepared for comparative purposes only and do not purport to be indicative of the results of operations which actually would have resulted had these acquisitions occurred at January 1, 2024, nor are they necessarily indicative of future operating results. Annualized revenues of entities acquired in 2025 totaled approximately $3,562 million. Total revenues, earnings before income tax and net earnings before interest, income taxes, depreciation, amortization and the change in estimated acquisition earnout payables recorded in our consolidated statement of earnings for 2025 related to the 2025 acquisitions in the aggregate, were $1,369 million, $25 million and $296 million, respectively.
v3.25.4
Contracts with Customers
12 Months Ended
Dec. 31, 2025
Revenue from Contract with Customer [Abstract]  
Contracts with Customers Contracts with Customers
Contract Assets and Liabilities/Contract Balances
Information about unbilled receivables, contract assets and contract liabilities from contracts with customers is as follows (in millions):
December 31, 2025December 31, 2024
Unbilled receivables$1,858 $1,274 
Deferred contract costs338 207 
Deferred revenue892 604 
The unbilled receivables, which are included in accounts receivable, net in our consolidated balance sheet, primarily relate to our rights to consideration for work completed but not billed at the reporting date. These are transferred to the billed accounts receivables when the client is invoiced. The deferred contract costs represent the costs we incur to fulfill a new or renewal contract with our clients prior to the effective date of the contract. These costs are expensed on the contract effective date. The deferred revenue in the consolidated balance sheet included amounts that represent the remaining performance obligations under our contracts and amounts collected related to advanced billings and deposits received from customers that may or may not ultimately be recognized as revenues in the future. Deposits received from customers could be returned to the customers based on lesser actual transactional volume than originally billed volume.
Significant changes in the deferred revenue balances, which include foreign currency translation adjustments, during the period are as follows (in millions):
BrokerageRisk
Management
Total
Deferred revenue at December 31, 2023$533 $172 $705 
Incremental deferred revenue305 91 396 
Revenue recognized during the year ended December 31, 2024 included in deferred revenue at December 31, 2023(390)(86)(476)
Net change in collected billings/deposits received from customers(40)(4)(44)
Impact of changes in foreign exchange rates— — — 
Deferred revenue recognized from business acquisitions23 — 23 
Deferred revenue at December 31, 2024431 173 604 
Incremental deferred revenue296 112 408 
Revenue recognized during the year ended December 31, 2025 included in deferred revenue at December 31, 2024(335)(88)(423)
Net change in collected billings/deposits received from customers(4)(2)
Impact of changes in foreign exchange rates(21)— (21)
Deferred revenue recognized from business acquisitions326 — 326 
Deferred revenue at December 31, 2025$693 $199 $892 
Revenue recognized during 2025 in the table above included revenue from 2024 acquisitions that would not be reflected in prior years.
Remaining Performance Obligations
Remaining performance obligations represent the portion of the contract price for which work has not been performed. As of December 31, 2025, the aggregate amount of the contract price allocated to remaining performance obligations was $892 million.
The estimated revenue expected to be recognized in the future related to performance obligations that are unsatisfied (or partially unsatisfied) at the end of the reporting period is as follows (in millions):
BrokerageRisk
Management
Total
2026$668 $47 $715 
202722 77 99 
202835 36 
202917 18 
2030— 
Thereafter15 16 
Total$693 $199 $892 
Deferred Contract Costs
We capitalize costs incurred to fulfill contracts as “deferred contract costs” which are included in other current assets in our consolidated balance sheet. Deferred contract costs were $338 million and $207 million as of December 31, 2025 and 2024, respectively. Capitalized fulfillment costs are amortized to expense on the contract effective date. The amount of amortization of the deferred contract costs was $909 million and $666 million for the years ended December 31, 2025 and 2024, respectively.
We have applied the practical expedient to recognize the incremental costs of obtaining contracts as an expense when incurred if the amortization period of the assets that we otherwise would have recognized is one year or less for our
brokerage segment. These costs are included in compensation and operating expenses in our consolidated statement of earnings.
v3.25.4
Fixed Assets
12 Months Ended
Dec. 31, 2025
Property, Plant and Equipment [Abstract]  
Fixed Assets Fixed Assets
Major classes of fixed assets consist of the following (in millions):
December 31,
20252024
Office equipment$53 $34 
Furniture and fixtures215 152 
Leasehold improvements326 260 
Computer equipment439 362 
Land and buildings - corporate headquarters174 172 
Software942 721 
Other42 41 
Work in process80 64 
2,271 1,806 
Accumulated depreciation(1,482)(1,156)
Net fixed assets$789 $650 
The amounts in work in process in the table above primarily are for capitalized expenditures incurred related to IT development projects in 2025 and 2024.
v3.25.4
Intangible Assets
12 Months Ended
Dec. 31, 2025
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets Intangible Assets
The carrying amount of goodwill at December 31, 2025 and 2024 allocated by domestic and foreign operations is as follows (in millions):
BrokerageRisk
Management
CorporateTotal
At December 31, 2025
United States$16,428 $109 $— $16,537 
United Kingdom2,889 142 — 3,031 
Canada628 — — 628 
Australia591 238 — 829 
New Zealand225 — 233 
Other foreign1,317 — 18 1,335 
Total goodwill - net$22,078 $497 $18 $22,593 
At December 31, 2024
United States$6,966 $75 $— $7,041 
United Kingdom2,591 26 — 2,617 
Canada587 — — 587 
Australia509 219 — 728 
New Zealand183 — 191 
Other foreign1,087 — 19 1,106 
Total goodwill - net$11,923 $328 $19 $12,270 
The changes in the carrying amount of goodwill for 2025 and 2024 are as follows (in millions):
BrokerageRisk
Management
CorporateTotal
Balance as of December 31, 2023$11,218 $239 $19 $11,476 
Goodwill acquired during the year830 — 837 
Goodwill adjustments related to appraisals and other acquisition adjustments98 101 — 199 
Goodwill written-off related to sales of business(6)— — (6)
Foreign currency translation adjustments during the year(217)(19)— (236)
Balance as of December 31, 202411,923 328 19 12,270 
Goodwill acquired during the year9,770 134 — 9,904 
Goodwill adjustments related to appraisals and other acquisition adjustments32 — 41 
Goodwill written-off related to sales of business(20)— — (20)
Foreign currency translation adjustments during the year373 26 (1)398 
46022$22,078 $497 $18 $22,593 
Major classes of amortizable intangible assets consist of the following (in millions):
December 31,
20252024
Expiration lists$15,968 $8,764 
Accumulated amortization - expiration lists(5,357)(4,313)
10,611 4,451 
Non-compete agreements125 118 
Accumulated amortization - non-compete agreements(98)(86)
27 32 
Trade names160 120 
Accumulated amortization - trade names(114)(73)
46 47 
Net amortizable assets$10,684 $4,530 
Estimated aggregate amortization expense for each of the next five years is as follows (in millions):
2026$1,105 
20271,071 
20281,028 
2029973 
2030917 
Thereafter5,590 
Total$10,684 
v3.25.4
Credit and Other Debt Agreements
12 Months Ended
Dec. 31, 2025
Debt Disclosure [Abstract]  
Credit and Other Debt Agreements Credit and Other Debt Agreements
The following is a summary of our corporate and other debt (in millions):
December 31,
20252024
Senior Notes:
Semi-annual payments of interest, fixed rate of 4.60%, balloon due December 15, 2027
$750 $750 
Semi-annual payments of interest, fixed rate of 4.85%, balloon due December 15, 2029
750 750 
Semi-annual payments of interest, fixed rate of 2.40%, balloon due November 9, 2031
400 400 
Semi-annual payments of interest, fixed rate of 5.00%, balloon due February 15, 2032
500 500 
Semi-annual payments of interest, fixed rate of 5.50%, balloon due March 2, 2033
350 350 
Semi-annual payments of interest, fixed rate of 6.50%, balloon due February 15, 2034
400 400 
Semi-annual payments of interest, fixed rate of 5.45%, balloon due July 15, 2034
500 500 
Semi-annual payments of interest, fixed rate of 5.15%, balloon due February 15, 2035
1,500 1,500 
Semi-annual payments of interest, fixed rate of 3.50%, balloon due May 20, 2051
850 850 
Semi-annual payments of interest, fixed rate of 3.05%, balloon due March 9, 2052
350 350 
Semi-annual payments of interest, fixed rate of 5.75%, balloon due March 2, 2053
600 600 
Semi-annual payments of interest, fixed rate of 6.75%, balloon due February 15, 2054
600 600 
Semi-annual payments of interest, fixed rate of 5.75%, balloon due July 15, 2054
500 500 
Semi-annual payments of interest, fixed rate of 5.55%, balloon due February 15, 2055
1,500 1,500 
Total Senior Notes9,550 9,550 
Note Purchase Agreements:
Semi-annual payments of interest, fixed rate of 4.31%, balloon due June 24, 2025
— 200 
Semi-annual payments of interest, fixed rate of 4.85%, balloon due February 13, 2026
140 140 
Semi-annual payments of interest, fixed rate of 4.73%, balloon due February 27, 2026
175 175 
Semi-annual payments of interest, fixed rate of 4.40%, balloon due June 2, 2026
175 175 
Semi-annual payments of interest, fixed rate of 4.36%, balloon due June 24, 2026
150 150 
Semi-annual payments of interest, fixed rate of 3.75%, balloon due January 30, 2027
30 30 
Semi-annual payments of interest, fixed rate of 4.09%, balloon due June 27, 2027
125 125 
Semi-annual payments of interest, fixed rate of 4.09%, balloon due August 2, 2027
125 125 
Semi-annual payments of interest, fixed rate of 4.14%, balloon due August 4, 2027
98 98 
Semi-annual payments of interest, fixed rate of 3.46%, balloon due December 1, 2027
100 100 
Semi-annual payments of interest, fixed rate of 4.55%, balloon due June 2, 2028
75 75 
Semi-annual payments of interest, fixed rate of 4.34%, balloon due June 13, 2028
125 125 
Semi-annual payments of interest, fixed rate of 5.04%, balloon due February 13, 2029
100 100 
Semi-annual payments of interest, fixed rate of 4.98%, balloon due February 27, 2029
100 100 
Semi-annual payments of interest, fixed rate of 4.19%, balloon due June 27, 2029
50 50 
Semi-annual payments of interest, fixed rate of 4.19%, balloon due August 2, 2029
50 50 
Semi-annual payments of interest, fixed rate of 3.48%, balloon due December 2, 2029
50 50 
Semi-annual payments of interest, fixed rate of 3.99%, balloon due January 30, 2030
341 341 
Semi-annual payments of interest, fixed rate of 4.44%, balloon due June 13, 2030
125 125 
Semi-annual payments of interest, fixed rate of 5.14%, balloon due March 13, 2031
180 180 
Semi-annual payments of interest, fixed rate of 4.70%, balloon due June 2, 2031
25 25 
Semi-annual payments of interest, fixed rate of 4.09%, balloon due January 30, 2032
69 69 
Semi-annual payments of interest, fixed rate of 4.34%, balloon due June 27, 2032
75 75 
Semi-annual payments of interest, fixed rate of 4.34%, balloon due August 2, 2032
75 75 
Semi-annual payments of interest, fixed rate of 4.59%, balloon due June 13, 2033
125 125 
Semi-annual payments of interest, fixed rate of 5.29%, balloon due March 13, 2034
40 40 
Semi-annual payments of interest, fixed rate of 4.48%, balloon due June 12, 2034
175 175 
Semi-annual payments of interest, fixed rate of 4.24%, balloon due January 30, 2035
79 79 
Semi-annual payments of interest, fixed rate of 2.44%, balloon due February 10, 2036
100 100 
Semi-annual payments of interest, fixed rate of 2.46%, balloon due May 5, 2036
75 75 
Semi-annual payments of interest, fixed rate of 4.69%, balloon due June 13, 2038
75 75 
Semi-annual payments of interest, fixed rate of 5.45%, balloon due March 13, 2039
40 40 
Semi-annual payments of interest, fixed rate of 4.49%, balloon due January 30, 2040
56 56 
Total Note Purchase Agreements3,323 3,523 
Credit Agreement:
Periodic payments of interest and principal, expires April 3, 2030
— — 
Premium Financing Debt Facility - expires October 31, 2027:
Facility B
AUD denominated tranche, interbank rates plus 1.300%
217 218 
NZD denominated tranche, interbank rates plus 1.850%
— — 
Facility C and D
AUD denominated tranche, interbank rates plus 0.780%
— — 
NZD denominated tranche, interbank rates plus 0.990%
Total Premium Financing Debt Facility226 225 
Total corporate and other debt13,099 13,298 
Less unamortized debt acquisition costs on Senior Notes and Note Purchase Agreements(81)(90)
Less unamortized discount on Bonds Payable(48)(51)
Net corporate and other debt$12,970 $13,157 
The Senior Notes in the table above are registered by the Company with the Securities and Exchange Commission and are not guaranteed.
Senior Notes - On December 19, 2024, we closed and funded an offering of $5,000 million of unsecured senior notes in five tranches. The $750 million aggregate principal amount of 4.60% Senior Notes is due in 2027, $750 million aggregate principal amount of 4.85% Senior Notes is due in 2029, $500 million aggregate principal amount of 5.00% Senior Notes is due in 2032, $1,500 million aggregate principal amount of 5.15% Senior Notes is due in 2035 and $1,500 million aggregate principal amount 5.55% Senior Notes is due in 2055. The weighted average interest rate is 5.25% per annum after giving effect to underwriting costs and a net hedge gain. During 2024, we entered into a pre-issuance interest rate hedging transaction related to these notes. We realized a net cash gain of approximately $4 million on the hedging transactions that will be recognized on a pro rata basis as a decrease to our reported interest expense over ten years. We used the net proceeds of this offering to fund a portion of the cash consideration payable in connection with the AssuredPartners acquisition and for general corporate purposes including other acquisitions.
On February 12, 2024, we closed and funded an offering of $1,000 million of unsecured senior notes in two tranches. The $500 million aggregate principal amount of 5.45% Senior Notes is due in 2034 and $500 million aggregate principal amount of 5.75% Senior Notes is due in 2054. The weighted average interest rate is 5.71% per annum after giving effect to underwriting costs and a net hedge loss. During 2024, we entered into a pre-issuance interest rate hedging transaction related to these notes. We realized a net cash loss of approximately $1 million on the hedging transactions that will be recognized on a pro rata basis as an increase to our reported interest expense over ten years. We used the proceeds of these offerings to fund acquisitions, earnout payments related to acquisitions and general corporate purposes.
Note Purchase Agreements - During June 2025, we used operating cash to fund the $200 million Series O note maturity that had a fixed rate of 4.31% that was due June 24, 2025.
During February 2024, we used operating cash to fund the $100 million Series HH note maturity that had a fixed rate of 4.72% that was due February 13, 2024 and the $325 million Series H note maturity that had a fixed rate of 4.58% that was due February 27, 2024.
Under the terms of the note purchase agreements described above, we may redeem the notes at any time, in whole or in part, at 100% of the principal amount of such notes being redeemed, together with accrued and unpaid interest and a “make-whole amount”. The “make-whole amount” is derived from a net present value computation of the remaining scheduled payments of principal and interest using a discount rate based on the U.S. Treasury yield plus 0.5% and is designed to compensate the purchasers of the notes for their investment risk in the event prevailing interest rates at the time of prepayment are less favorable than the interest rates under the notes. We do not currently intend to prepay any of the notes.
The note purchase agreements described above contain customary provisions for transactions of this type, including representations and warranties regarding us and our subsidiaries and various financial covenants, including covenants that require us to maintain specified financial ratios. We were in compliance with these covenants as of December 31, 2025. The note purchase agreements also provide customary events of default, generally with corresponding grace periods,
including, without limitation, payment defaults with respect to the notes, covenant defaults, cross-defaults to other agreements evidencing our or our subsidiaries’ indebtedness, certain judgments against us or our subsidiaries and events of bankruptcy involving us or our material subsidiaries.
The notes issued under the note purchase agreement are senior unsecured obligations of ours and rank equal in right of payment with our Credit Agreement discussed below.
Credit Agreement - On April 3, 2025, we entered into an amendment and restatement to our Credit Agreement dated June 22, 2023 (which, as amended and restated, refer to as the Credit Agreement). The Credit Agreement provides for a five-year unsecured revolving credit facility in the amount of $2,500 million, which is also available in Pounds Sterling, Canadian Dollars, Australian Dollars, New Zealand Dollars, Euros, Japanese Yen and any other currencies agreed by the lenders. The Credit Agreement also includes a $75 million letter of credit sub-facility and a $250 million Euro swingline sub-facility. We may also, upon the agreement of either one or more then-existing lenders or of additional banks not currently party to the Credit Agreement, increase the commitments under the Credit Agreement up to $3,000 million. The amendment and restatement, among other things, also extended the maturity date from June 22, 2028 to April 3, 2030 and updated the facility fee and applicable margin as determined by reference to the rating of our long-term senior unsecured debt. The Credit Agreement permits us to designate wholly-owned subsidiaries located in certain jurisdictions as additional borrowers, the obligations of which under the Credit Agreement will be guaranteed by the Company, subject to the terms and conditions set forth in the Credit Agreement. Any subsidiary that guarantees any notes under the Company’s existing note purchase agreements is required to guarantee the obligations under the Credit Agreement. There are currently no subsidiary borrowers or guarantors under the Credit Agreement.
Loans borrowed under the Credit Agreement bear interest at a variable annual rate based on a customary benchmark rate for each available currency including Secured Overnight Financing Rate (which we refer to as SOFR) for loans in U.S. Dollars, or at our election solely for loans in U.S. Dollars, the base rate, plus in each case an applicable margin. Interest rates on base rate loans and outstanding drawings on letters of credit under the Credit Agreement will be based on the Base Rate, as defined in the Credit Agreement, plus a margin of 0.00% to 0.375%, depending on the rating of our long-term senior unsecured debt. Interest rates for SOFR loans and loans in currencies other than U.S. dollars under the Credit Agreement will be based on, as applicable, a SOFR Daily Floating Rate, Term SOFR, Alternative Currency Daily Rate or Alternative Currency Term Rate, as defined in the Credit Agreement, plus a margin of 0.775% to 1.375%, depending on the rating of our long-term senior unsecured debt. The annual facility fee related to the Credit Agreement is between 0.100% and 0.250% of the revolving credit commitment, depending on the rating of our long-term senior unsecured debt. Subject to certain conditions stated in the Credit Agreement, we may borrow, prepay and reborrow amounts under the Credit Agreement at any time during the term of the Credit Agreement. Funds borrowed under the Credit Agreement may be used for general corporate and working capital purposes of the Company and its subsidiaries.
The Credit Agreement also contains customary representations and warranties and affirmative and negative covenants, including financial covenants, as well as customary events of default, with corresponding grace periods, including without limitations, payment defaults, cross‑defaults to other agreements evidencing indebtedness and bankruptcy-related defaults. We were in compliance with these covenants as of December 31, 2025.
At December 31, 2025, $2 million of letters of credit (for which we had $11 million of liabilities recorded at December 31, 2025) were outstanding under the Credit Agreement. See Note 15 to these consolidated financial statements for a discussion of the letters of credit. There were no borrowings outstanding under the Credit Agreement at December 31, 2025. Accordingly, at December 31, 2025, $2,498 million remained available for potential borrowings.
Premium Financing Debt Facility - On November 17, 2025, we entered into an amendment to our revolving loan facility (which we refer to as the Premium Financing Debt Facility), that provides funding for the three Australian (AU) and New Zealand (NZ) premium finance subsidiaries. The Premium Financing Debt Facility is comprised of: (i) Facility B is separated into AU$390 million and NZ$25 million tranches (the AU$ tranche will be decreased on March 2, 2026 to AU$310 million and the NZ$ tranche will be decreased as of March 2, 2026 to NZ$10 million), (ii) Facility C, an AU$60 million equivalent multi-currency overdraft tranche and (iii) Facility D, a NZ$15 million equivalent multi-currency overdraft tranche.
The interest rates on Facility B are Interbank rates, which vary by tranche, duration and currency, plus a margin of 1.300% and 1.850% for the AU$ and NZ$ tranches, respectively. The interest rates on Facilities C and D are 30 day Interbank rates, plus a margin of 0.780% and 0.990% for the AU$ and NZ$ tranches, respectively. The annual fee for Facility B is
0.52% and 0.8325% for the undrawn commitments for the AU$ and NZ$ tranches, respectively. The annual fee for Facility C is 0.77% and for Facility D is 0.90% of the total commitments of the facilities.
The terms of our Premium Financing Debt Facility include various financial covenants, including covenants that require us to maintain specified financial ratios. We were in compliance with these covenants as of December 31, 2025. The Premium Financing Debt Facility also includes customary provisions for transactions of this type, including events of default, with corresponding grace periods and cross-defaults to other agreements evidencing our indebtedness. Facilities B, C and D are secured by the premium finance receivables of the Australian and New Zealand premium finance subsidiaries.
At December 31, 2025, AU$325 million and NZ$0 million of borrowings were outstanding under Facility B, AU$0 million of borrowings outstanding under Facility C and NZ$15 million of borrowings were outstanding under Facility D, which in aggregate amount to US$226 million of borrowings outstanding under the Premium Financing Debt Facility. Accordingly, as of December 31, 2025, AU$65 million and NZ$25 million remained available for potential borrowing under Facility B, and AU$60 million and NZ$0 million under Facilities C and D, respectively.
See Note 15 to these consolidated financial statements for additional discussion on our contractual obligations and commitments as of December 31, 2025.
The aggregate estimated fair value of the $12,873 million in debt under our various senior notes and note purchase agreements at December 31, 2025 was $12,183 million due to the long-term duration and fixed interest rates associated with these debt obligations. No active or observable market exists for our private long-term debt. Therefore, the estimated fair value of this debt is based on the income valuation approach, which is a valuation technique that converts future amounts (for example, cash flows or income and expenses) to a single current (that is, discounted) amount. The fair value measurement is determined on the basis of the value indicated by current market expectations about those future amounts. Because our debt issuances generate a measurable income stream for each lender, the income approach was deemed to be an appropriate methodology for valuing the private placement long‑term debt. The methodology used calculated the original deal spread at the time of each debt issuance, which was equal to the difference between the yield of each issuance (the coupon rate) and the equivalent benchmark treasury yield at that time. The market spread as of the valuation date was calculated, which is equal to the difference between an index for investment grade insurers and the equivalent benchmark treasury yield today. An implied premium or discount to the par value of each debt issuance based on the difference between the origination deal spread and market as of the valuation date was then calculated. The index we relied on to represent investment graded insurers was the Bloomberg Valuation Services (BVAL) U.S. Insurers BBB index. This index is comprised primarily of insurance brokerage firms and was representative of the industry in which we operate. For the purpose of our analysis, the average BBB rate was assumed to be the appropriate borrowing rate for us. The estimated fair value of the borrowings outstanding under our Credit Agreement approximate their carrying value due to their short-term duration and variable interest rates. The estimated fair value of the $226 million of borrowings outstanding under our Premium Financing Debt Facility approximates their carrying value due to their short-term duration and variable interest rates.
v3.25.4
Earnings Per Share
12 Months Ended
Dec. 31, 2025
Earnings Per Share [Abstract]  
Earnings Per Share Earnings per Share
The following table sets forth the computation of basic and diluted net earnings per share (in millions, except per share data):
Year Ended December 31,
202520242023
Net earnings attributable to controlling interests$1,494 $1,463 $970 
Weighted average number of common shares outstanding256.1 220.5 214.9 
Dilutive effect of stock options using the treasury stock method4.0 4.5 4.4 
Weighted average number of common and common equivalent shares outstanding260.1 225.0 219.3 
Basic net earnings per share$5.83 $6.63 $4.51 
Diluted net earnings per share$5.74 $6.50 $4.42 
Anti-dilutive stock-based awards of 0.9 million shares were outstanding at December 31, 2025, 2024 and 2023 but were excluded in the computation of the dilutive effect of stock‑based awards for the years then ended. These stock-based
awards were excluded from the computation because the exercise prices on these stock-based awards were greater than the average market price of our common shares during the respective period, and therefore, would be anti‑dilutive to earnings per share under the treasury stock method.
v3.25.4
Stock Option Plans
12 Months Ended
Dec. 31, 2025
Share-Based Payment Arrangement [Abstract]  
Stock Option Plans Stock Option Plans
On May 10, 2022, our stockholders approved the Arthur J. Gallagher & Co. 2022 Long-Term Incentive Plan (which we refer to as the LTIP), which replaced our previous stockholder-approved Arthur J. Gallagher & Co. 2017 Long-Term Incentive Plan (which we refer to as the 2017 LTIP). The LTIP term began May 10, 2022 and terminates on the date of the annual meeting of stockholders in 2032, unless terminated earlier by our board of directors. All of our officers, employees and non-employee directors are eligible to receive awards under the LTIP. The compensation committee of our board of directors determines the annual number of shares delivered under the LTIP. The LTIP provides for non-qualified and incentive stock options, stock appreciation rights, restricted stock and restricted stock units, any or all of which may be made contingent upon the achievement of performance criteria.
Shares of our common stock available for issuance under the LTIP include authorized and unissued shares of common stock or authorized and issued shares of common stock reacquired and held as treasury shares or otherwise, or a combination thereof. The number of available shares will be reduced by the aggregate number of shares that become subject to outstanding awards granted under the LTIP. A maximum of 3.5 million shares issued for full value awards (i.e., awards other than stock options or stock appreciation rights) will be counted one-for-one against the 13.5 million share pool, and every share subject to a full value award in excess of such limit count as 3.8 shares against the pool. To the extent that shares subject to an outstanding award granted under either the LTIP or prior equity plans are not issued or delivered by reason of the expiration, termination, cancellation or forfeiture of such award or by reason of the settlement of such award in cash, then such shares will again be available for grant under the LTIP.
The maximum number of shares available under the LTIP for restricted stock, restricted stock unit awards and performance unit awards settled with stock (i.e., all awards other than stock options and stock appreciation rights) is 2.1 million as of December 31, 2025.
The LTIP provides for the grant of stock options, which may be either tax-qualified incentive stock options or non-qualified options and stock appreciation rights. The compensation committee determines the period for the exercise of a non-qualified stock option, tax-qualified incentive stock option or stock appreciation right, provided that no option can be exercised later than seven years after its date of grant. The exercise price of a non-qualified stock option or tax-qualified incentive stock option and the base price of a stock appreciation right cannot be less than 100% of the fair market value of a share of our common stock on the date of grant, provided that the base price of a stock appreciation right granted in tandem with an option will be the exercise price of the related option.
Upon exercise, the option exercise price may be paid in cash, by the delivery of previously owned shares of our common stock, through a net-exercise arrangement, or through a broker-assisted cashless exercise arrangement. The compensation committee determines all of the terms relating to the exercise, cancellation or other disposition of an option or stock appreciation right upon a termination of employment, whether by reason of disability, retirement, death or any other reason. Stock option and stock appreciation right awards under the LTIP are non-transferable.
On March 1, 2025, the compensation committee granted 829,000 options under the LTIP to our officers and key employees that become exercisable at the rate of 34%, 33% and 33% on the anniversary date of the grant in 2028, 2029 and 2030, respectively. On March 1, 2024, the compensation committee granted 1,044,000 options under the LTIP to our officers and key employees that become exercisable at the rate of 34%, 33% and 33% on the anniversary date of the grant in 2027, 2028 and 2029, respectively. On March 15, 2023, the compensation committee granted 1,131,000 options under the LTIP to our officers and key employees that become exercisable at the rate of 34%, 33% and 33% on the anniversary date of the grant in 2026, 2027 and 2028, respectively.
The 2025, 2024 and 2023 options expire seven years from the date of grant, or earlier in the event of certain terminations of employment. Stock options granted in 2023 to certain executive officers age 55 or older are not subject to forfeiture upon such officers’ departure from the Company after two years from date of grant. Stock options granted in 2025 and 2024 to executive officers are not subject to forfeiture upon such officers’ departure from the Company once they attain the age of 62.
Our stock option plans provide for the immediate vesting of all outstanding stock option grants in the event of a change in control of the Company, as defined in the applicable plan documents.
During 2025, 2024 and 2023, we recognized $54 million, $48 million, and $34 million, respectively, of compensation expense related to our stock option grants.
For purposes of expense recognition in 2025, 2024 and 2023, the estimated fair values of the stock option grants are amortized to expense over the options’ vesting period. We estimated the fair value of stock options at the date of grant using the Black-Scholes option pricing model with the following weighted average assumptions:
Year Ended December 31,
202520242023
Expected dividend yield0.8 %1.0 %1.2 %
Expected risk-free interest rate4.1 %4.2 %3.6 %
Volatility25.4 %25.3 %25.0 %
Expected life (in years)5.55.55.5
Option valuation models require the input of highly subjective assumptions including the expected stock price volatility. The Black‑Scholes option pricing model was developed for use in estimating the fair value of traded options which have no vesting restrictions and are fully transferable. The weighted average fair value per option for all options granted during 2025, 2024 and 2023, as determined on the grant date using the Black-Scholes option pricing model, was $98.27, $69.55 and $46.48, respectively.
The following is a summary of our stock option activity and related information for 2025 and 2024 (in millions, except exercise price and year data):
Shares
Under
Option
Weighted
Average
Exercise
Price
Weighted
Average
Remaining
Contractual
Term
(in years)
Aggregate
Intrinsic
Value
Year Ended December 31, 2025
Beginning balance7.3$148.26 
Granted0.8337.75 
Exercised(1.2)104.78 
Forfeited or canceled(0.2)196.67 
Ending balance6.7$177.48 3.43$609 
Exercisable at end of year2.2$111.16 1.71$320 
Ending unvested and expected to vest4.3$206.25 4.20$279 
Year Ended December 31, 2024
Beginning balance7.9$123.85 
Granted1.0243.54 
Exercised(1.4)77.93 
Forfeited or canceled(0.2)160.87 
Ending balance7.3$148.26 3.78$995 
Exercisable at end of year1.7$90.06 1.78$337 
Ending unvested and expected to vest5.2$164.49 4.40$624 
Options with respect to 10.2 million shares (less any shares of restricted stock issued under the LTIP - see Note 11 to these consolidated financial statements) were available for grant under the LTIP at December 31, 2025.
The total intrinsic value of options exercised during 2025, 2024 and 2023 amounted to $251 million, $244 million and $182 million, respectively. As of December 31, 2025, we had approximately $137 million of total unrecognized compensation expense related to nonvested options. We expect to recognize that cost over a weighted average period of approximately four years.
Other information regarding stock options outstanding and exercisable at December 31, 2025 is summarized as follows (in millions, except exercise price and year data):
Range of Exercise PricesOptions OutstandingOptions Exercisable
Number
Outstanding
Weighted
Average
Remaining
Contractual
Term
(in years)
Weighted
Average
Exercise
Price
Number
Exercisable
Weighted
Average
Exercise
Price
$79.59 $— $79.59 $0.3 $0.20$79.59 $0.3 $79.59 
86.17 — 86.17 0.8 1.1986.17 0.8 86.17 
127.90 — 127.90 1.1 2.21127.90 0.7 127.90 
156.85 — 156.85 0.8 3.09156.85 0.2 156.85 
158.56 — 161.14 0.9 3.21158.64 0.2 158.59 
177.09 — 202.13 1.0 4.20177.77 — — 
238.88 — 243.54 1.0 5.16243.54 — — 
337.74 — 347.44 0.8 6.16337.75 — — 
$79.59 $— $347.44 $6.7 $3.43$177.48 $2.2 $111.16 
v3.25.4
Deferred Compensation
12 Months Ended
Dec. 31, 2025
Compensation Related Costs [Abstract]  
Deferred Compensation Deferred Compensation
We have a Deferred Equity Participation Plan, (which we refer to as the DEPP), which is a non-qualified plan that generally provides for distributions to certain of our key executives when they reach age 62 (or the one-year anniversary of the date of the grant for participants over the age of 61 as of the grant date) or upon or after their actual retirement if later. Under the provisions of the DEPP, we typically contribute cash in an amount approved by the compensation committee to a rabbi trust on behalf of the executives participating in the DEPP, and instruct the trustee to acquire a specified number of shares of our common stock on the open market or in privately negotiated transactions based on participant elections. Distributions under the DEPP may not normally be made until the participant reaches age 62 (or the one-year anniversary of the date of the grant for participants over the age of 61 as of the grant date) and are subject to forfeiture in the event of voluntary termination of employment or termination for cause prior to then. DEPP awards are generally made annually in the first quarter. In addition, we annually make awards under sub-plans of the DEPP for certain production staff, which generally provide for vesting and/or distributions no sooner than five years from the date of awards, although certain awards vest and/or distribute after the earlier of fifteen years or the participant reaching age 65. All contributions to the plan (including sub-plans) deemed to be invested in shares of our common stock are distributed in the form of our common stock and all other distributions are paid in cash.
Our common stock that is issued to or purchased by the rabbi trust as a contribution under the DEPP is valued at historical cost, which equals its fair market value at the date of grant or date of purchase. When common stock is issued, we record an unearned deferred compensation obligation as a reduction of capital in excess of par value in the accompanying consolidated balance sheet, which is amortized to compensation expense ratably over the vesting period of the participants. Future changes in the fair market value of our common stock owed to the participants do not have any impact on the amounts recorded in our consolidated financial statements.
In the first quarter of 2025, 2024 and 2023, the compensation committee approved $22 million, $23 million and $25 million, respectively, of awards in the aggregate to certain key executives under the DEPP that were contributed to the rabbi trust in the first quarters of 2025, 2024 and 2023, respectively. We contributed cash to the rabbi trust and instructed the trustee to acquire a specified number of shares of our common stock on the open market to fund these 2025, 2024 and 2023 awards. During 2025, 2024 and 2023, we charged $18 million, $21 million and $22 million, respectively, to compensation expense related to these awards.
In 2025, 2024 and 2023, the compensation committee approved $2 million, $2 million and $3 million, respectively, of awards under the sub‑plans referred to above, which were contributed to the rabbi trust in the first quarters of 2025, 2024 and 2023, respectively. During 2025, 2024 and 2023, we charged $2 million, $2 million and $3 million respectively, to compensation expense related to these awards. There were $13 million, $3 million and $14 million of distributions from the sub-plans during 2025, 2024 and 2023.
At December 31, 2025 and 2024, we recorded $81 million (related to 1.8 million shares) and $77 million (related to 2.2 million shares), respectively, of unearned deferred compensation as a reduction of capital in excess of par value in the accompanying consolidated balance sheet. The total intrinsic value of our unvested equity based awards under the plan at December 31, 2025 and 2024 was $475 million and $616 million, respectively. During 2025, 2024 and 2023, cash and equity awards with an aggregate fair value of $83 million, $40 million and $78 million, respectively, were vested and distributed to executives under the DEPP.
We have a Deferred Cash Participation Plan (which we refer to as the DCPP), which is a non-qualified deferred compensation plan for certain key employees, other than executive officers, that generally provides for vesting and/or distributions no sooner than five years from the date of awards. Under the provisions of the DCPP, we typically contribute cash in an amount approved by the compensation committee to the rabbi trust on behalf of the executives participating in the DCPP, and instruct the trustee to acquire a specified number of shares of our common stock on the open market or in privately negotiated transactions based on participant elections. In the first quarter of each of 2025, 2024 and 2023, the compensation committee approved $8 million, $8 million and $10 million, respectively, of awards in the aggregate to certain key executives under the DCPP that were contributed to the rabbi trust in second quarters of 2025, 2024 and 2023, respectively. During 2025, 2024 and 2023 we charged $14 million, $19 million and $17 million to compensation expense related to these awards. There were $41 million, $44 million and $23 million of distributions from the DCPP during 2025, 2024 and 2023, respectively.
v3.25.4
Restricted Stock, Performance Share and Cash Awards
12 Months Ended
Dec. 31, 2025
Share-Based Payment Arrangement [Abstract]  
Restricted Stock, Performance Share and Cash Awards Restricted Stock, Performance Share and Cash Awards
Restricted Stock Awards
As discussed in Note 9 to these consolidated financial statements, on May 10, 2022, our stockholders approved the LTIP, which replaced our previous stockholder-approved 2017 LTIP. The LTIP provides for the grant of a stock award either as restricted stock or as restricted stock units to officers, employees and non-employee directors. In either case, the compensation committee may determine that the award will be subject to the attainment of performance measures over an established performance period. Stock awards and the related dividend equivalents are non-transferable and subject to forfeiture if the holder does not remain continuously employed with us during the applicable restriction period or, in the case of a performance-based award, if applicable performance measures are not attained. The compensation committee will determine all of the terms relating to the satisfaction of performance measures and the termination of a restriction period, or the forfeiture and cancellation of a restricted stock award upon a termination of employment, whether by reason of disability, retirement, death or any other reason.
The agreements awarding restricted stock units under the LTIP will specify whether such awards may be settled in shares of our common stock, cash or a combination of shares and cash and whether the holder will be entitled to receive dividend equivalents, on a current or deferred basis, with respect to such award. Prior to the settlement of a restricted stock unit, the holder of a restricted stock unit will have no rights as a stockholder of the Company. The maximum number of shares available under the LTIP for restricted stock, restricted stock units and performance unit awards settled with stock (i.e., all awards other than stock options and stock appreciation rights) is 4.0 million. At December 31, 2025, 2.1 million shares were available for grant under the LTIP for such awards.
In 2025, 2024 and 2023, we granted 304,709, 355,245 and 396,913 restricted stock units, respectively, to employees under the LTIP and 2017 LTIP, with an aggregate fair value of $101 million, $85 million and $67 million, respectively, at the date of grant. In addition to awards made under the LTIP, we also granted employment inducement awards of restricted stock units in third quarter 2025 as contemplated by New York Stock Exchange Listing Rule 303A.08. The inducement awards were intended to provide incentive to certain AssuredPartners individuals in connection with the AssuredPartners acquisition to either remain employed by AssuredPartners through the completion date or to enter into employment with Gallagher. We granted 341,700 restricted stock units to former AssuredPartners employees under these inducement awards with an aggregate fair value of $100 million, at the date of grant, to remain employed by AssuredPartners through the closing date with immediate vesting at the closing date. We granted 708,000 restricted stock units to former AssuredPartners employees under these inducement awards with an aggregate fair value of $215 million, at the date of
grant, to enter into employment with Gallagher, which will vest over a two to five year period commencing August 18, 2025.
These 2025, 2024 and 2023, restricted stock units vest as follows: 297,000 units granted in first quarter 2025, 1,000 units granted in second quarter 2025, 300 granted in third quarter 2025, 344,600 units granted in first quarter 2024, 800 units granted in second quarter 2024, 700 units in third quarter 2024, 2,300 units in fourth quarter 2024, 390,000 units granted in first quarter 2023 vest in full based on continued employment through March 1, 2030, March 1, 2029 and March 15, 2028, respectively, while the other 2024 and 2023 restricted stock unit awards generally vest in full based on continued employment through the vesting period on the anniversary date of the grant. For our executive officers age 55 or older, restricted stock units awarded in 2025, 2024 and 2023 are not subject to forfeiture upon such officers’ departure from the Company after two years from the date of grant.
The vesting periods of the 2025, 2024 and 2023 restricted stock unit awards are as follows (in actual shares):
Restricted Stock Units Granted
Vesting Period202520242023
One year6,2106,8007,360
Five years298,499348,445389,553
Total shares granted304,709355,245396,913
We account for restricted stock awards at historical cost, which equals its fair market value at the date of grant, which is amortized to compensation expense ratably over the vesting period of the participants. Future changes in the fair market value of our common stock that is owed to the participants do not have any impact on the amounts recorded in our consolidated financial statements. During 2025, 2024 and 2023, we charged $75 million, $54 million and $43 million, respectively, to compensation expense related to restricted stock awards granted in 2018 through 2024. The total intrinsic value of unvested restricted stock at December 31, 2025 and 2024 was $643 million and $549 million, respectively. During 2025 and 2024, equity awards (including accrued dividends) with an aggregate fair value of $213 million and $94 million were vested and distributed to employees under this plan.
Performance Share Awards
On March 1, 2025, March 1, 2024 and March 15, 2023, pursuant to the LTIP, the compensation committee approved 68,000, 58,000 and 58,000, respectively of provisional performance share awards, with an aggregate fair value of $22 million, $14 million and $10 million, respectively, for future grants to our officers. Each performance share award was equivalent to the value of one share of our common stock on the date such provisional award was approved. At the end of the performance period, eligible participants will receive a number of earned shares based on the growth in adjusted EBITDAC per share (as defined in our 2025 Proxy Statement). Earned shares for the 2025, 2024 and 2023 provisional awards will fully vest based on continuous employment through March 1, 2028, March 1, 2027 and March 15, 2026, respectively, and will be settled in unrestricted shares of our common stock on a one‑for‑one basis as soon as practicable thereafter. The 2025, 2024 and 2023 awards are subject to a three-year performance period that began on January 1, 2025, 2024 and 2023, respectively, and vest on the three-year anniversary of the date of grant (March 1, 2028, March 1, 2027 and March 15, 2026). Performance share awards granted in 2023 to certain executive officers age 55 or older, are not subject to forfeiture upon such officers’ departure from the Company after two years from the date of grant. Performance share awards granted in 2024 to executive officers are not subject to forfeiture upon such officers’ departure from the Company once they attain the age of 62. In each case, the awards vest on a pro rata basis based on the number of months rounded up during which the officer was employed during the three-year performance period. During 2025, 2024 and 2023, we recognized $26 million, $22 million and $20 million, respectively, to compensation expense related to performance share awards granted in 2020 through 2024. The total intrinsic value of unvested performance share awards at December 31, 2025 and 2024 was $88 million and $93 million. During 2025, 2024 and 2023, equity awards (including accrued dividends) with an aggregate fair value of $36 million, $32 million and $29 million were vested and distributed to employees under this plan.
Cash Awards
Pursuant to our Performance Unit Program (which we refer to as the Program), there were no units granted in 2025 and 2024. The Program consists of a one-year performance period based on our financial performance and a three-year vesting period measured from January 1 of the year of grant. At the discretion of the compensation committee and determined
based on our performance, the eligible officer or key employee will be granted a percentage of the provisional cash award units that equates to the EBITDAC growth achieved (as defined in the Program). At the end of the performance period, eligible participants will be granted a number of units based on achievement of the performance goal and subject to approval by the compensation committee. Granted units will fully vest based on continuous employment through the three-year vesting period. The ultimate award value will be equal to the trailing twelve‑month price of our common stock, multiplied by the number of units subject to the award, but limited to between 0.5 and 1.5 times the original value of the units determined as of the grant date. The fair value of the awarded units will be paid out in cash as soon as practicable. If an eligible employee leaves us prior to the vesting date, the entire award will be forfeited.
On March 15, 2022, pursuant to the Program, the compensation committee approved provisional cash awards of $20 million in the aggregate for future grants to our officers and key employees that are denominated in units (125,000 units in the aggregate), each of which was equivalent to the value of one share of our common stock on the date the provisional award was approved. Based on our performance for 2022, we granted 122,000 units under the Program in first quarter of 2023 that fully vested on January 1, 2025. During 2025 there was no compensation expense recognized elated to these awards. During both 2024 and 2023 we charged $13 million to compensation expense related to these awards. We did not recognize any compensation expense during 2022 related to the 2022 provisional award under the Program.
During 2025, cash awards related to the 2022 provisional awards with an aggregate fair value of $27 million (111,000 units in the aggregate) were vested and distributed to employees under the Program. During 2024, cash awards related to the 2021 provisional awards with an aggregate fair value of $25 million (129,000 units in the aggregate) were vested and distributed to employees under the Program. During 2023, cash awards related to the 2020 provisional awards with an aggregate fair value of $25 million (191,000 units in the aggregate) were vested and distributed to employees under the Program.
v3.25.4
Retirement Plans
12 Months Ended
Dec. 31, 2025
Retirement Benefits [Abstract]  
Retirement Plans Retirement Plans
We have a noncontributory defined benefit pension plan that, prior to July 1, 2005, covered substantially all of our domestic employees who had attained a specified age and one year of employment. Benefits under the plan were based on years of service and salary history. In 2005, we amended our defined benefit pension plan to freeze the accrual of future benefits for all U.S. employees, effective on July 1, 2005. Since the plan is frozen, there is no difference between the projected benefit obligation and accumulated benefit obligation at December 31, 2025 and 2024.
Through the acquisition of the partnership interests of BCHR holdings, L.P. and its subsidiaries dba Buck (which we refer to as Buck) in 2023, we acquired the assets and assumed the liabilities associated with three frozen defined benefit pension plans that provide postretirement benefits to their participants located in the U.S., U.K. and Canada (which we refer to as the Buck Pension Plans). The Buck Pension Plans were amended to freeze benefit plan accruals for all participants (closed to new entrants and existing participants do not accrue any additional benefits) effective December 31, 2014. Effective December 31, 2024, the U.S. Buck Pension Plan was merged into our defined benefit pension plan.
In 2025, we initiated a process to fully terminate the plan. In fourth quarter 2025, substantially all of the future obligations under the plan were settled through a combination of lump sum payments to eligible, electing participants and a transfer of the remaining liability through the purchase of a group annuity contract to a highly-rated third-party insurance company. As of December 31, 2025, the only remaining obligations are payments to the Pension Benefit Guaranty Corporation (which we refer to as the PBGC) for missing participants and the distribution of the surplus assets to plan participants. Since there were no other plan benefits remaining on December 31, 2025, no actuarial assumptions were required as of that date. Settlement accounting was measured as of December 31, 2025. In 2026, after the liability for the missing participants has been transferred to the PBGC and the remaining assets have been distributed, the final plan termination accounting will be completed. In fourth quarter 2025, we recognized a non-cash, pre-tax loss of approximately $16 million to operating expense in the consolidated statement of earnings that was offset by an approximately $12 million adjustment to consolidated statement of comprehensive earnings, and a $4 million reversal of a deferred tax asset. In 2026, based on estimates as of December 31, 2025, we expect to recognize a non-cash, pre-tax loss of approximately $17 million to operating expense in the consolidated statement of earnings related to the final plan termination accounting.
In the table below, the service cost component represents plan administration costs that are incurred directly by the plan. A reconciliation of the beginning and ending balances of the pension benefit obligation and fair value of plan assets and the funded status of the plan is as follows (in millions):
Year Ended December 31,
20252024
Change in pension benefit obligation:
Benefit obligation at beginning of year$296 $216 
Service cost
Interest cost16 10 
Merger of the Buck U.S. pension plan— 95 
Net actuarial loss (gain)(11)
Settlement(293)— 
Benefits paid(19)(15)
Benefit obligation at end of year$$296 
Change in plan assets:
Fair value of plan assets at beginning of year$312 $229 
Actual return on plan assets19 15 
Merger of the Buck U.S. pension plan— 84 
Contributions by the Company— 
Settlement(293)— 
Benefits paid(19)(16)
Fair value of plan assets at end of year$20 $312 
Funded status of the plan$17 $16 
Amounts recognized in the consolidated balance sheet consist of:
Prepaid pension asset$17 $16 
Accumulated other comprehensive income— 18 
Net amount included in retained earnings$17 $34 
The components of the net periodic pension benefit cost for the plan and other changes in plan assets and obligations recognized in earnings and other comprehensive earnings consist of the following (in millions):
Year Ended December 31,
202520242023
Net periodic pension cost:
Service cost$$$
Interest cost on benefit obligation16 10 11 
Expected return on plan assets(15)(16)(14)
Amortization of net loss— 
Settlement16 — — 
Net periodic benefit income (cost)18 (2)
Other changes in plan assets and obligations recognized in other comprehensive earnings:
Net (gain) incurred(2)(10)(12)
Amortization of net loss(16)(3)(5)
Total recognized in other comprehensive (loss)(18)(13)(17)
Total recognized in net periodic pension cost and other comprehensive (loss)$— $(15)$(12)
The following weighted average assumptions were used at December 31 in determining the plan’s pension benefit obligation:
December 31,
20252024
Discount rateN/A5.50 %
Weighted average expected long-term rate of return on plan assets5.00 %7.00 %
The following weighted average assumptions were used at January 1 in determining the plan’s net periodic pension benefit cost:
Year Ended December 31,
202520242023
Discount rate5.50 %4.75 %5.25 %
Weighted average expected long-term rate of return on plan assets5.00 %7.00 %7.00 %
The following benefit payments are expected to be paid by the plan (in millions):
2026$17 
2027— 
2028— 
2029— 
2030— 
2030 to 2034— 
The following is a summary of the plan’s weighted average asset at December 31 by asset category:
December 31,
Asset Category20252024
Equity securities%%
Debt securities100 %100 %
Real estate%%
Total100 %100 %
Plan assets are invested in various pooled separate accounts under annuity contracts managed by two life underwriting enterprises. The plan’s investment policy provides that investments will be allocated in a manner designed to provide a long‑term investment return greater than the actuarial assumptions, maximize investment return commensurate with risk and to comply with the Employee Income Retirement Security Act of 1974, as amended (which we refer to as ERISA), by investing the funds in a manner consistent with ERISA’s fiduciary standards. The weighted average expected long-term rate of return on plan assets assumption was determined based on a review of the asset allocation strategy of the plan using expected ten-year return assumptions for all of the asset classes in which the plan was invested at December 31, 2025 and 2024. The return assumptions used in the valuation were based on data provided by the plan’s external investment advisors.
The following is a summary of the plan’s assets carried at fair value as of December 31 by level within the fair value hierarchy (in millions):
December 31,
Fair Value Hierarchy20252024
Level 1$— $— 
Level 218 205 
Level 3107 
Total fair value$20 $312 
The plan’s Level 2 assets consist of ownership interests in various pooled separate accounts within a life insurance carrier’s group annuity contract. The fair value of the pooled separate accounts is determined based on the net asset value of the respective funds, which is obtained from the underwriting enterprise and determined each business day with issuances and redemptions of units of the funds made based on the net asset value per unit as determined on the valuation date. We have not adjusted the net asset values provided by the underwriting enterprise. There are no restrictions as to the plan’s ability to redeem its investment at the net asset value of the respective funds as of the reporting date. The plan’s Level 3 assets consist of pooled separate accounts within another life insurance carrier’s annuity contracts for which fair value has been determined by an independent valuation. Due to the nature of these annuity contracts, our management makes assumptions to determine how a market participant would price these Level 3 assets. In determining fair value, the future cash flows to be generated by the annuity contracts were estimated using the underlying benefit provisions specified in each contract, market participant assumptions and various actuarial and financial models. These cash flows were then discounted to present value using a risk-adjusted rate that takes into consideration market based rates of return and probability-weighted present values.
The following is a reconciliation of the beginning and ending balances for the Level 3 assets of the plan measured at fair value (in millions):
Year Ended December 31,
20252024
Fair value at January 1$107 $109 
Settlements(111)(11)
Unrealized gain
Fair value at December 31$$107 
We were not required under the IRC to make any minimum contributions to the plan for each of the 2025, 2024 and 2023 plan years. This level of required funding is based on the plan being frozen and the aggregate amount of our historical funding. During 2025, 2024 and 2023 we did not make discretionary contributions to the plan.
We comply with the minimum funding requirements in the U.S., U.K. and Canada and make annual contributions to the Buck Pension Plans consistent with those funding requirements. We recognize the funded status of the Buck Pension Plans, measured as the difference between the fair value of the plan assets and the projected benefit obligation, in the accompanying December 31, 2025 and 2024 consolidated balance sheets.
We also have a qualified contributory savings and thrift 401(k) plan covering the majority of our domestic employees. For eligible employees who have met the plan’s age and service requirements to receive matching contributions, we historically have matched 100% of pre-tax and Roth elective deferrals up to a maximum of 5% of eligible compensation, subject to federal limits on plan contributions and not in excess of the maximum amount deductible for federal income tax purposes. Beginning in 2022, the amount matched by the Company will be discretionary and annually determined by management. Employees must be employed and eligible for the plan on the last day of the plan year to receive a matching contribution, subject to certain exceptions enumerated in the plan document. Matching contributions are subject to a five-year graduated vesting schedule and can be funded in cash or common stock of the Company. We expensed (net of plan forfeitures) $115 million, $105 million and $86 million related to the plan in 2025, 2024 and 2023 respectively. During 2023 and 2024, management determined the 5% employer matching contributions on eligible compensation to the 401(k) plan for the 2023 and 2024 plan years to be funded with our common stock, which were funded in February 2024 and 2025, respectively.
During 2025, management determined the 5% employer matching contributions on eligible compensation to the 401(k) plan for the 2025 plan year would be funded with our common stock, which is expected to be funded in February 2026.
We also have a nonqualified deferred compensation plan, the Supplemental Savings and Thrift Plan, for certain employees who, due to IRS rules, cannot take full advantage of our matching contributions under the 401(k) plan. The plan permits these employees to annually elect to defer a portion of their compensation until their retirement or a future date. Our matching contributions to this plan (up to a maximum of the lesser of a participant’s elective deferral of base salary, annual bonus and commissions or 5% of eligible compensation, less matching amounts contributed under the 401(k) plan) are also discretionary and annually determined by management. Matching contributions can be funded in cash or common stock of the Company. We expensed $17 million, $14 million and $12 million related to contributions made to a rabbi trust maintained under the plan in 2025, 2024 and 2023, respectively. During 2025, management determined the 5% employer matching contributions on eligible compensation to the plan for the 2025 plan year would be funded with our common stock, which is expected to be funded in February 2026. The fair value of the assets in the plan’s rabbi trust at December 31, 2025 and 2024, including employee contributions and investment earnings, was $1,046 million and $909 million, respectively, and has been included in other noncurrent assets and the corresponding liability has been included in other noncurrent liabilities in the accompanying consolidated balance sheet.
We also have several foreign benefit plans, the largest of which is a defined contribution plan that provides for us to make contributions of 5% of eligible compensation. In addition, the plan allows for voluntary contributions by U.K. employees, which we match 100%, up to a maximum of an additional 5% of eligible compensation. Net expense for foreign retirement plans amounted to $105 million, $93 million and $77 million in 2025, 2024 and 2023, respectively.
v3.25.4
Leases
12 Months Ended
Dec. 31, 2025
Leases [Abstract]  
Leases Leases
We have operating leases primarily related to branch facilities, data centers, sales offices, and agent locations, automobiles and office equipment. Many of our leases include both lease (fixed rent payments) and non-lease components (common-area or other maintenance costs) which are accounted for as a single lease component as we have elected the practical expedient to group lease and non-lease components for all leases. Variable lease payments, such as periodically indexed and/or market adjustments, are presented as lease expense in the period in which they are incurred. Since we did not elect the short-term policy election, we record leases of 12 months or less on the balance sheet.
We exclude options to extend or terminate a lease from our recognition as part of our right-of-use assets and lease liabilities until those options are reasonably certain and/or executed. We do not have any material guarantees, options to purchase, or restrictive covenants related to our leases.
As our leases do not provide an implicit rate, we use our incremental borrowing rate based on the information available at the lease commencement date in determining the present value of the lease payments. We consider qualitative factors including our derived credit rating, notched adjustments for collateralization, lease term, and, if significant, adjustments to our collateralized rate to borrow in the same currency in which the lease is denominated.
The components of lease expense are as follows (in millions):
Lease ComponentsStatement of Earnings
Classification
Year ended
December 31, 2025
Operating lease expenseOperating expense$167 
Variable lease expenseOperating expense32 
Sublease incomeInvestment income(2)
Total net lease expense$197 
Variable lease cost consist primarily of common-area and other maintenance costs for our lease facilities, as well as variable lease payments related to indexed and/or market adjustments. Our sublease income derives primarily from a few office lease arrangements and we have no significant sublease losses.
Year ended
Supplemental Cash Flow Information Related to Leases (in millions)December 31, 2025
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases$155 
Right-of-use assets obtained in exchange for new operating lease liabilities$343 
We present all noncash transactions related to adjustments to the lease liability or right-of-use asset as noncash transactions. This includes all noncash charges related to any modification or reassessment events triggering remeasurement.
Supplemental balance sheet information related to leases is as follows (in millions, except lease term and discount rate):
Lease ComponentsBalance Sheet ClassificationDecember 31, 2025
Lease right-of-use assetsRight-of-use assets$598 
Other current lease liabilitiesAccrued compensation and other current liabilities131 
Lease liabilitiesLease liabilities - noncurrent515 
Total lease liabilities$646 
Weighted-average remaining lease term, years6.1
Weighted-average discount rate4.9 %
Maturities of operating lease liabilities for each of the next five years and thereafter are as follows (in millions):
2026$173 
2027148 
2028111 
202984 
203073 
Thereafter184 
Total lease payments773 
Less interest(127)
Total$646 
Our leases have remaining lease terms of 0.0 years to 12.3 years, some of which may include options to extend the leases for up to 10.0 years and some of which may include options to terminate the leases.
As of December 31, 2025, we had $72 million of additional leases that have not yet commenced. These leases will commence in 2026 with lease terms of 6 months to 12.0 years.
v3.25.4
Derivatives and Hedging Activity
12 Months Ended
Dec. 31, 2025
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Derivatives and Hedging Activity Derivatives and Hedging Activity
We are exposed to market risks, including changes in foreign currency exchange rates and interest rates. To manage the risk related to these exposures, we enter into various derivative instruments that reduce these risks by creating offsetting exposures. We generally do not enter into derivative transactions for trading or speculative purposes.
Foreign Exchange Risk Management
We are exposed to foreign exchange risk when we earn revenues, pay expenses, or enter into monetary intercompany transfers denominated in a currency that differs from our functional currency, or other transactions that are denominated in a currency other than our functional currency. We use foreign exchange derivatives, typically forward contracts and options, to reduce our overall exposure to the effects of currency fluctuations on cash flows. These exposures are hedged, on average, for less than three years.
Interest Rate Risk Management
We enter into various long-term debt agreements. We use interest rate derivatives, typically swaps, to reduce our exposure to the effects of interest rate fluctuations on the forecasted interest rates for up to three years into the future.
We have not received or pledged any collateral related to derivative arrangements at December 31, 2025.
The notional and fair values of derivatives designated as hedging instruments are as follows at December 31, 2025 and 2024 (in millions):
Derivative AssetsDerivative Liabilities
InstrumentNotional
Amount
Balance Sheet
Classification
Fair
Value
Balance Sheet
Classification
Fair
Value
At December 31, 2025
Interest rate contracts$1,500 Other current assets$Accrued compensation and$
Other noncurrent assets— other current liabilities
Other noncurrent liabilities— 
Foreign exchange contracts (1)399 Other current assetsAccrued compensation and
other current liabilities
Other noncurrent assetsOther noncurrent liabilities
Total$1,899 $23 $12 
At December 31, 2024
Interest rate contracts$— Other current assets$— Accrued compensation and$— 
Other noncurrent assets— other current liabilities
Other noncurrent liabilities— 
Foreign exchange contracts (1)24 Other current assetsAccrued compensation and
other current liabilities
Other noncurrent assetsOther noncurrent liabilities
Total$24 $$
(1)Included within foreign exchange contracts at December 31, 2025 were $790 million of call options offset with $790 million of put options, and no buy forwards, offset with $399 million of sell forwards. Included within foreign exchange contracts at December 31, 2024 were $595 million of call options offset with $595 million of put options, and $1 million of buy forwards offset with $26 million of sell forwards.
Fair values of these hedge contracts are based on observable and unobservable inputs. Observable inputs include all of the following: quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the asset or liability (for example: interest rates and yield curves observable at commonly quoted intervals, implied volatilities, credit spreads) and market-corroborated inputs. Unobservable inputs are used to measure fair value to the extent that relevant observable inputs are not available, thereby allowing for situations in which there is little, if any, market activity for the asset or liability at the measurement date.
The effect of cash flow hedge accounting on accumulated other comprehensive loss were as follows (in millions):
InstrumentAmount of
Gain (Loss)
Recognized in
Accumulated
Other
Comprehensive
Loss (1)
Amount of
Gain (Loss)
Reclassified
from
Accumulated
Other
Comprehensive
Loss into
Earnings
Amount of
Gain (Loss)
Recognized
in Earnings
Related to
Amount
Excluded
from
Effectiveness
Testing
Statement of Earnings
Classification
Year ended December 31, 2025
Interest rate contracts$(16)$(1)$— Interest expense
Foreign exchange contracts(5)(13)— Commission revenue
(1)Compensation expense
(1)— Operating expense
Total$(21)$(16)$
Year ended December 31, 2024
Interest rate contracts$(6)$(1)$— Interest expense
Foreign exchange contracts(11)(2)— Commission revenue
(2)Compensation expense
(2)— Operating expense
Total$(17)$(7)$
(1)During 2025, the amount excluded from the assessment of hedge effectiveness for our foreign exchange contracts recognized in accumulated other comprehensive loss was a gain of $2 million.
We estimate that approximately $21 million of pretax gain currently included within accumulated other comprehensive income will be reclassified into earnings in the next twelve months.
v3.25.4
Commitments, Contingencies and Off-Balance Sheet Arrangements
12 Months Ended
Dec. 31, 2025
Commitments and Contingencies Disclosure [Abstract]  
Commitments, Contingencies and Off-Balance Sheet Arrangements Commitments, Contingencies and Off-Balance Sheet Arrangements
In connection with our investing and operating activities, we have entered into certain contractual obligations and commitments. See Note 7 to these consolidated financial statements for additional discussion of these obligations and commitments. Our future minimum cash payments, including interest, associated with our contractual obligations pursuant to the Senior Notes, Note purchase agreements, Credit Agreement, Premium Financing Debt Facility, operating leases and purchase commitments at December 31, 2025 were as follows (in millions):
Payments Due by Period
Contractual Obligations20262027202820292030ThereafterTotal
Senior Notes$— $750 $— $750 $— $8,050 $9,550 
Note purchase agreements640 478 200 350 466 1,189 3,323 
Credit Agreement— — — — — — — 
Premium Financing Debt Facility226 — — — — — 226 
Interest on debt612 593 539 528 473 6,117 8,862 
Total debt obligations1,478 1,821 739 1,628 939 15,356 21,961 
Operating lease obligations173 148 111 84 73 184 773 
Less sublease arrangements(3)(2)(2)(2)— — (9)
Outstanding purchase obligations278 227 101 50 26 42 724 
Total contractual obligations$1,926 $2,194 $949 $1,760 $1,038 $15,582 $23,449 
The amounts presented in the table above may not necessarily reflect our actual future cash funding requirements, because the actual timing of the future payments made may vary from the stated contractual obligation.
Senior Notes, Note Purchase Agreements, Credit Agreement and Premium Financing Debt Facility - See Note 7 to these consolidated financial statements for a summary the amounts outstanding under the Senior Notes, Note purchase agreements, the Credit Agreement and Premium Financing Debt Facility.
Operating Lease Obligations - Our corporate segment’s executive offices and certain subsidiary and branch facilities of our brokerage and risk management segments are located in a building we own at 2850 Golf Road, Rolling Meadows, Illinois, where we have approximately 360,000 square feet of space and can accommodate approximately 2,000 employees. Relating to the development of our corporate headquarters, we expect to receive property tax related credits under a tax-increment financing note from Rolling Meadows and an Illinois state Economic Development for a Growing Economy (which we refer to as EDGE) tax credit. Since inception in 2017 through 2025, we have earned approximately $75 million of Edge credits, with fiscal year 2025 representing the final year of EDGE credit generation.
We generally operate in leased premises at our other locations. Certain of these leases have options permitting renewals for additional periods. In addition to minimum fixed rentals, a number of leases contain annual escalation clauses which are generally related to increases in an inflation index.
Total rent expense, including rent relating to cancelable leases and leases with initial terms of less than one year, amounted to $208 million in 2025, $183 million in 2024 and $184 million in 2023.
We have leased certain office space to several non-affiliated tenants under operating sublease arrangements. In the normal course of business, we expect that certain of these leases will not be renewed or replaced. We adjust charges for real estate taxes and common area maintenance annually based on actual expenses, and we recognize the related revenues in the year in which the expenses are incurred. These amounts are not included in the minimum future rentals to be received in the contractual obligations table above.
Outstanding Purchase Obligations - We typically do not have a material amount of outstanding purchase obligations at any point in time. The amount disclosed in the contractual obligations table above represents the aggregate amount of unrecorded purchase obligations that we had outstanding at December 31, 2025. These obligations represent agreements to purchase goods or services that were executed in the normal course of business.
Off-Balance Sheet Commitments - Our total unrecorded commitments associated with outstanding letters of credit, financial guarantees and funding commitments at December 31, 2025 were as follows (in millions):
Amount of Commitment Expiration by PeriodTotal
Amounts
Committed
Off-Balance Sheet Commitments20262027202820292030Thereafter
Letters of credit$— $— $— $— $— $14 $14 
Financial guarantees— — — — — 50 50 
Total commitments$— $— $— $— $— $64 $64 
Since commitments may expire unused, the amounts presented in the table above do not necessarily reflect our actual future cash funding requirements. See the Off-Balance Sheet Debt section below for a discussion of letters of credit. All of the letters of credit represent multiple year commitments that have annual, automatic renewing provisions and are classified by the latest commitment date.
Substantially all of the purchase agreements related to these acquisitions we do contain provisions for potential earnout obligations. For all of our acquisitions made in the period from 2022 to 2025 that contain potential earnout obligations, such obligations are measured at fair value as of the acquisition date and are included on that basis in the recorded purchase price consideration for the respective acquisition. The amounts recorded as earnout payables are primarily based upon estimated future potential operating results of the acquired entities over a two- to three-year period subsequent to the acquisition date. The aggregate amount of the maximum earnout obligations related to these acquisitions was $1,518 million, of which $773 million was recorded in our consolidated balance sheet as of December 31, 2025 based on the estimated fair value of the expected future payments to be made, of which approximately $535 million can be settled in cash or common stock at our option and $238 million must be settled in cash.
Off-Balance Sheet Debt - Our unconsolidated investment portfolio includes investments in enterprises where our ownership interest is between 1% and 50%, in which management has determined that our level of influence and economic
interest is not sufficient to require consolidation. As a result, these investments are accounted for under the equity method. None of these unconsolidated investments had any outstanding debt at December 31, 2025 and 2024 that was recourse to us.
At December 31, 2025, we had posted one letter of credit related to our self-insurance deductibles, for which we had a recorded liability of $11 million. We have an equity investment in a rent-a-captive facility, which we use as a placement facility for certain of our insurance brokerage operations. At December 31, 2025, we had posted eleven letters of credit totaling $13 million to allow certain of our captive operations to meet minimum statutory surplus requirements plus additional collateral related to premium and claim funds held in a fiduciary capacity and one letter of credit totaling $1 million for collateral related to claim funds held in a fiduciary capacity by a recent acquisition. These letters of credit have never been drawn upon.
Our commitments associated with outstanding letters of credit, financial guarantees and funding commitments at December 31, 2025 were as follows (all dollar amounts in table are in millions):
Description, Purpose and TriggerCollateralCompensation
to Us
Maximum
Exposure
Liability
Recorded
Credit support under letters of credit (LOC) for deductibles due by us on our own insurance coverages - expires 2028NoneNone$— $11 
Trigger - We do not reimburse the insurance companies for deductibles the insurance companies advance on our behalf
Credit enhancement under letters of credit for our captive insurance operations to meet minimum statutory capital requirements - expires 2028NoneReimbursement of LOC fees13 — 
Trigger - Dissolution or catastrophic financial results of the operation
Collateral related to claims funds held in a fiduciary capacity by a recent acquisition - expires 2028NoneNone— 
Trigger - Claim payments are not made
$14 $11 
(1)The guarantees are collateralized by shares in minority holdings of our Canadian operating companies.
Since commitments may expire unused, the amounts presented in the table above do not necessarily reflect our actual future cash funding requirements.
Litigation, Regulatory and Taxation Matters - We routinely are involved in legal proceedings, claims, disputes, regulatory matters and governmental inspections or investigations arising in the ordinary course of or incidental to our business, including relating errors and omissions (which we refer to as E&O) claims and those noted below in this section. We record accruals in the consolidated financial statements for pending litigation when we determine that an unfavorable outcome is probable and the amount of the loss can be reasonably estimated. For the matters we disclose that do not include an estimate of the amount of loss or range of losses, such an estimate is not possible or is immaterial, and we may be unable to estimate the possible loss or range of losses that could potentially result from the application of non-monetary remedies, unless disclosed below. We currently believe that the ultimate outcome of these proceedings, individually and in the aggregate, will not materially harm our financial position, results of operations or cash flows. However, legal proceedings and government investigations are subject to inherent uncertainties, and unfavorable rulings or other adverse events could occur, including the payment of substantial monetary damages or an injunction or other order prohibiting us from selling one or more products at all or in particular ways, precluding particular business practices or requiring other remedies, which may result in a material adverse impact on our business, results of operations or financial position.
As previously disclosed, our IRC 831(b) (or “micro-captive”) advisory services businesses has been under a promoter investigation by the IRS since 2013. Among other matters, the IRS is investigating whether we have been acting as a tax
shelter promoter in connection with these operations. Additionally, the IRS is conducting a criminal investigation related to IRC 831(b) micro-captive underwriting enterprises. We have been advised that we are not a target of the criminal investigation. We are fully cooperating with both matters.
Contingent Liabilities - We purchase insurance to provide protection from E&O claims that may arise during the ordinary course of business. Currently we retain the first $15 million of each and every E&O claim. In addition, we retain, in aggregate up to another $2 million between $15 million and $100 million, plus up to another $10 million between $100 million and $200 million, and up to another $20 million between $200 million and $400 million. We have historically maintained self-insurance reserves for the portion of our E&O exposure that is not insured. We periodically determine a range of possible reserve levels using actuarial techniques that rely heavily on projecting historical claim data into the future. Our E&O reserve in the December 31, 2025 consolidated balance sheet is above the lower end of the most recently determined actuarial range by $8 million and below the upper end of the actuarial range by $9 million. We can make no assurances that the historical claim data used to project the current reserve levels will be indicative of future claim activity. Thus, the E&O reserve level and corresponding actuarial range could change in the future as more information becomes known, which could materially impact the amounts reported and disclosed herein.
v3.25.4
Income Taxes
12 Months Ended
Dec. 31, 2025
Income Tax Disclosure [Abstract]  
Income Taxes Income Taxes
We and our principal domestic subsidiaries are included in a consolidated U.S. federal income tax return. Our international subsidiaries file various income tax returns in their jurisdictions. Significant components of earnings before income taxes and the provision for income taxes are as follows (in millions):
Year Ended December 31,
202520242023
Earnings before income taxes:
United States$1,211 $972 $605 
Foreign, principally Australia, Canada, New Zealand and the U.K.660 903 580 
Total earnings before income taxes$1,871 $1,875 $1,185 
Provision for income taxes:
Federal:
Current$39 $38 $(22)
Deferred94 112 113 
133 150 91 
State and local:
Current42 53 (15)
Deferred(8)(1)43 
34 52 28 
Foreign:
Current224 194 213 
Deferred(23)(113)
201 202 100 
Provision for income taxes$368 $404 $219 
In December 2023, the FASB issued ASU No. 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures (“ASU 2023-09”), which requires a company to disclose specified additional information in its income tax rate reconciliation and provide additional information for reconciling items that meet a quantitative threshold. ASU 2023-09 also requires the company to disaggregate its income taxes paid disclosure by federal, state and foreign taxes, with further disaggregation required for significant individual jurisdictions
We have adopted ASU 2023-09 using a prospective transition method. A reconciliation of the provision for income taxes with the U.S. federal statutory income tax rate is as follows (in millions, except percentages):
Year Ended December 31,
2025
Amount% of Pretax
Earnings
U.S. federal statutory income tax$393 21.0 %
Domestic federal:
Tax credits
(19)(1.0)
Non taxable / nondeductible items
Excess tax benefits on share-based payments
(77)(4.1)
Nondeductible executive compensation (IRC 162(m))24 1.3 
Other 0.3 
Cross-border tax laws
Income (loss) from branches / disregarded entities (1)(57)(3.1)
Other16 0.9 
Changes in valuation allowance (2)41 2.2 
Other (2)(51)(2.7)
Domestic state and local income taxes, net of federal benefits *25 1.3 
Foreign tax effects:
U.K.:
Nontaxable / nondeductible items
Earnout liability adjustments22 1.2 
Other37 2.0 
Other foreign jurisdiction (3)0.1 
Changes in unrecognized tax benefits0.4 
Provision for income taxes$368 19.7 %
(1)Includes foreign tax credit benefits of $33 million.
(2)In 2025, we completed the sale of the Pronto Group that resulted in a $40 million U.S. federal capital loss. A valuation allowance was recorded against the related deferred tax asset; therefore, no income tax benefit was recognized, and deferred tax assets associated with the transaction were written off.
(3)We have determined that none of the remaining foreign jurisdictions for which there are foreign tax effects reconciling items meet the 5% threshold in any of the years presented.
* In 2025, state and local income taxes in California, New York, Pennsylvania, Florida and New Jersey comprised the majority of the state and local income taxes, net of federal effect category.
The following is a reconciliation of the U.S. federal statutory income tax rate to our effective rate for the years 2024 and 2023 in accordance with the guidance prior to the adoption of ASU 2023-09 (in millions, except percentages):
Year Ended December 31,
20242023
Amount% of Pretax
Earnings
Amount% of Pretax
Earnings
Federal statutory rate$394 21.0 %$249 21.0 %
State income taxes - net of federal benefit61 3.3 50 4.2 
Differences related to non U.S. operations(14)(0.7)(21)(1.7)
Alternative energy and other tax credits(9)(0.5)(8)(0.7)
Other permanent differences43 2.3 27 2.3 
Stock-based compensation(89)(4.7)(76)(6.4)
Changes in unrecognized tax benefits0.4 12 1.0 
Change in valuation allowance10 0.5 0.3 
Change in tax rates— (18)(1.5)
Provision for income taxes$404 21.6 %$219 18.5 %

A reconciliation of the beginning and ending balances of the total amounts of gross unrecognized tax benefits is as follows (in millions):
December 31,
20252024
Gross unrecognized tax benefits at January 1$25 $25 
Increases in tax positions for current year
Settlements— (3)
Lapse in statute of limitations(1)(5)
Increases in tax positions for prior years17 
Decreases in tax positions for prior years— (10)
Gross unrecognized tax benefits at December 31$30 $25 
The total amount of net unrecognized tax benefits that, if recognized, would affect the effective tax rate was $30 million and $25 million at December 31, 2025 and 2024, respectively. We accrue interest and penalties related to unrecognized tax benefits in our provision for income taxes. At December 31, 2025 and 2024, we had accrued interest and penalties related to unrecognized tax benefits of $14 million and $10 million, respectively.
We file income tax returns in the U.S. and in various state, local and foreign jurisdictions. We are routinely examined by tax authorities in these jurisdictions. At December 31, 2025, our corporate returns had been examined by the IRS or the statute had lapsed through calendar year 2021. The IRS is currently examining the Company's U.S. federal income tax return for the tax year ended December 31, 2022. The examination remains ongoing. In addition, from 2021 forward, various state and foreign jurisdictions remain open.
Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. Significant components of our deferred tax assets and liabilities are as follows (in millions):
December 31,
20252024
Deferred tax assets:
Tax credit carryforwards$713 $772 
Accrued and unfunded compensation and employee benefits494 356 
Amortizable intangible assets560 177 
Compensation expense related to equity plans113 97 
Accrued liabilities176 126 
Depreciable fixed assets— 22 
Net operating loss carryforwards270 163 
Capital loss carryforwards56 
Interest expense limitation174 
Lease liabilities166 106 
Revenue recognition— 
Other
Total deferred tax assets2,729 1,837 
Valuation allowance for deferred tax assets(264)(177)
Deferred tax assets2,465 1,660 
Deferred tax liabilities:
Nondeductible amortizable intangible assets2,372 647 
Accrued pension liability
Depreciable fixed assets22 — 
Right-of-use assets154 97 
Hedging instruments34 36 
Other prepaid items30 16 
Revenue recognition124 — 
Other
Total deferred tax liabilities2,742 807 
Net deferred tax (liabilities) assets$(277)$853 
At December 31, 2025 and 2024, $319 million and $106 million, respectively, of deferred tax liabilities have been included in noncurrent liabilities in the accompanying consolidated balance sheet. General business and other tax credits of $674 million begin to expire, if not utilized, in 2032 and state credits, net of federal benefit, of $40 million, begin to expire, if not utilized in 2026. Net operating loss carryforwards of $270 million, related to federal, state and foreign begin to expire, if not utilized in 2026. We expect the historically favorable trend in earnings before income taxes to continue in the foreseeable future. Valuation allowances have been established for certain foreign intangible assets (including nondeductible amortization and earnout payable expenses) and various state net operating loss carryforwards that may not be utilized in the future.
At December 31, 2025, foreign earnings in all jurisdictions are considered indefinitely reinvested offshore.
Current U.S. tax law requires U.S. shareholders to include in income certain “global intangible low-taxed income” (which we refer to as GILTI) beginning in 2018. Our policy is to include the GILTI income in the future period when the tax arises and we recorded income tax expense on such income in 2025, 2024 and 2023. Current U.S. tax law includes the U.S. Base Erosion and Anti-Abuse Tax (which we refer to as BEAT) beginning in 2018. Based on our analysis, we determined that our base erosion payments do not exceed the threshold for applicability for the years in 2025, 2024 and 2023, and we do
not currently anticipate any significant long-term impact from the BEAT in our provision for income taxes in future periods.
v3.25.4
Supplemental Disclosures of Cash Flow Information
12 Months Ended
Dec. 31, 2025
Cash and Cash Equivalents [Abstract]  
Supplemental Disclosures of Cash Flow Information Supplemental Disclosures of Cash Flow Information
Year ended December 31,
Supplemental disclosures of cash flow information (in millions):202520242023
Interest paid$575 $347 $271 
Income taxes paid, net341 331 226 
Year ended December 31,
Income taxes paid (in millions)2025
Federal$42 
State
California19 
Other38 
Foreign
U.K.117 
Australia31 
New Zealand26 
Other68 
Total foreign242 
Income taxes paid, net$341 

The following is a reconciliation of our end of period cash, cash equivalents, restricted cash and fiduciary cash balances as presented in the consolidated statement of cash flows for the years ended December 31, 2025, 2024 and 2023 (in millions):
December 31,
202520242023
Cash and cash equivalents - non-restricted cash$1,155 $14,759 $781 
Cash and cash equivalents - restricted cash241 228 190 
Total cash and cash equivalents$1,396 $14,987 $971 
Fiduciary cash7,142 5,481 5,572 
Total cash, cash equivalents, restricted cash and fiduciary cash$8,538 $20,468 $6,543 
Total cash and cash equivalents, restricted cash and fiduciary cash at December 31, 2025 and December 31, 2024, include $2,916 million and $15,372 million, respectively, of income earning money market accounts. The decrease in cash invested in money market accounts between years is primarily due to the proceeds received from the AssuredPartners Financing ($13.5 billion) and proceeds received in January 2025 from the exercise by the underwriters of the overallotment provision related to the follow-on-common stock offering ($1.3 billion) which was used to fund the acquisition of AssuredPartners that closed on August 18, 2025. Refer to Note 3 for more information regarding the AssuredPartners Financing. The dividend income on money market accounts was recorded in interest income, premium finance and other income in our consolidated statement of earnings, which increased $296 million during 2025 ($363 million of which related to the proceeds from the AssuredPartners financing) to $769 million for the year ended December 31, 2025 compared to $473 million for the year ended December 31, 2024.
We have a qualified contributory savings and thrift 401(k) plan covering the majority of our domestic employees. For eligible employees who have met the plan’s age and service requirements to receive matching contributions, we historically have matched 100% of pre-tax and Roth elective deferrals up to a maximum of 5% of eligible compensation, subject to federal limits on plan contributions and not in excess of the maximum amount deductible for federal income tax purposes. Beginning in 2021, the amount matched by the Company will be discretionary and annually determined by management.
Employees must be employed and eligible for the plan on the last day of the plan year to receive a matching contribution, subject to certain exceptions enumerated in the plan document. Matching contributions are subject to a five-year graduated vesting schedule and can be funded in cash or the common stock of the Company. We expensed (net of plan forfeitures) $115 million, $105 million and $86 million related to the plan in 2025, 2024 and 2023, respectively. During 2024, management determined the 5% employer matching contributions on eligible compensation to the 401(k) plan for the 2024 plan year to be funded with our common stock, which was funded in February 2025. During 2025, management determined the 5% employer matching contributions on eligible compensation to the 401(k) plan for the 2025 plan year to be funded with our common stock, which is expected to be funded in February 2026.
v3.25.4
Accumulated Other Comprehensive Loss
12 Months Ended
Dec. 31, 2025
Equity [Abstract]  
Accumulated Other Comprehensive Loss Accumulated Other Comprehensive Loss
The after-tax components of our accumulated comprehensive loss attributable to controlling interests consist of the following (in millions):
Pension
Liability
Foreign
Currency
Translation
Fair Value
of Derivative
Instruments
Accumulated
Comprehensive
Loss
Balance as of January 1, 2022$(49)$(1,125)$34 $(1,140)
Net change in period12 258 78 348 
Balance as of December 31, 2023(37)(867)112 (792)
Net change in period14 (365)(8)(359)
Balance as of December 31, 2024(23)(1,232)104 (1,151)
Net change in period— 630 (4)626 
Balance as of December 31, 2025$(23)$(602)$100 $(525)
The foreign currency translation in 2025, 2024 and 2023 relates to the net impact of changes in the value of the local currencies relative to the U.S. dollar for our operations in Australia, Canada, the Caribbean, India, New Zealand, the U.K. and other non‑U.S. locations. The reporting currency for our financial statements is the U.S. dollar. Certain of our assets, liabilities, expenses and revenues are denominated in currencies other than the U.S. dollar, primarily the Australian dollar, British pound, Canadian dollar, and New Zealand dollar. To prepare our consolidated financial statements, we must translate those assets, liabilities, expenses and revenues into U.S. dollars at the applicable exchange rates. Assets and liabilities of non‑U.S. dollar functional currency operations are translated into U.S. dollars at end-of-period exchange rates while revenues, expenses and cash flows are translated at average monthly exchange rates over the period. Equity is translated at historical exchange rates and the resulting cumulative translation adjustments are included as a component of accumulated other comprehensive loss in the consolidated balance sheet. The net change in the foreign currency translation during 2025 primarily relates to goodwill (see Note 6 to these consolidated financial statements for the impact on goodwill) and amortizable intangible assets held by operations with a non‑U.S. dollar functional currency.
During 2025, 2024 and 2023, $16 million of expense, $7 million of expense and $3 million of expense, respectively, related to the fair value of derivative investments, was reclassified from accumulated other comprehensive loss to the statement of earnings. During 2025, 2024 and 2023, no amounts related to foreign currency translation were reclassified from accumulated other comprehensive loss to the statement of earnings.
v3.25.4
Segment Information
12 Months Ended
Dec. 31, 2025
Segment Reporting [Abstract]  
Segment Information Segment Information
We have three reportable segments: brokerage, risk management and corporate.
The brokerage segment is primarily comprised of our retail and wholesale insurance and reinsurance brokerage operations. The brokerage segment (which comprises our retail property/casualty, wholesale, reinsurance, benefits and captive operations) generates revenues through commissions paid by underwriting enterprises and through fees charged to our clients. Our brokers, agents and administrators act as intermediaries between underwriting enterprises and our clients and we do not assume net underwriting risks.
The risk management segment provides contract claim settlement and administration services for commercial, nonprofit, captive and public sector entities, and various organizations that choose to self-insure some or all of their property/casualty coverages and for underwriting enterprises that choose to outsource some or all of their property/casualty claims departments. These operations also provide claims management, loss control consulting and insurance property appraisal
services. Revenues are principally generated on a negotiated per-claim or per-service fee basis. Our risk management segment also provides risk management consulting services that are recognized as the services are delivered.
Revenues in the corporate segment consist of other income related to the run-off of legacy investments. In addition, the corporate segment reports the financial information related to our debt, external acquisition-related expenses, other corporate costs, the impact of foreign currency remeasurement and clean energy investments.
Allocations of investment income and certain expenses are based on reasonable assumptions and estimates primarily using revenue, headcount and other information. We allocate the provision for income taxes to the brokerage and risk management segments using the local country statutory rates. Reported operating results by segment would change if different methods were applied.
Our Chief Operating Decision Maker (which we refer to as CODM) who is our Chairman and Chief Executive Officer, analyzes and evaluates the operating performance of the three reportable segments presented below. We have disclosed for each reportable segment the significant expense categories that are reviewed by the CODM and there are no additional significant expenses within the expense categories presented in the tables below. The key areas of focus by the CODM for allocation of resources are revenues from each reportable segment, as well as their compensation and operating expenses.
Financial information relating to our segments for 2025, 2024 and 2023 is as follows (in millions):
Year Ended December 31, 2025BrokerageRisk
Management
CorporateTotal
Revenues:
Commissions$8,024 $— $— $8,024 
Fees2,646 1,549 — 4,195 
Supplemental revenues466 — — 466 
Contingent revenues324 — — 324 
Interest income, premium finance revenues and other income732 36 769 
Revenues before reimbursements12,192 1,585 13,778 
Reimbursements— 164 — 164 
Total revenues12,192 1,749 13,942 
Compensation6,660 974 208 7,842 
Operating1,676 298 284 2,258 
Reimbursements— 164 — 164 
Interest— — 639 639 
Depreciation159 40 206 
Amortization894 22 — 916 
Change in estimated acquisition earnout payables44 — 46 
Total expenses9,433 1,500 1,138 12,071 
Earnings (loss) before income taxes2,759 249 (1,137)1,871 
Provision (benefit) for income taxes707 66 (405)368 
Net earnings (loss)2,052 183 (732)1,503 
Net earnings (loss) attributable to noncontrolling interests— — 
Net earnings (loss) attributable to controlling interests$2,043 $183 $(732)$1,494 
Net foreign exchange (loss)$(5)$(1)$(48)$(54)
Revenues:
United States$8,003 $1,387 $$9,391 
United Kingdom2,372 105 — 2,477 
Australia344 242 — 586 
Canada387 — 395 
New Zealand207 — — 207 
Other foreign879 — 886 
Total revenues$12,192 $1,749 $$13,942 
At December 31, 2025
Identifiable assets:
United States$25,203 $1,335 $16,701 $43,239 
United Kingdom15,161 443 — 15,604 
Australia1,919 460 — 2,379 
Canada1,731 — 1,740 
New Zealand776 — 784 
Other foreign6,755 19 145 6,919 
Total identifiable assets$51,545 $2,274 $16,846 $70,665 
Goodwill - net$22,078 $497 $18 $22,593 
Amortizable intangible assets - net10,483 201 — 10,684 
Year Ended December 31, 2024BrokerageRisk
Management
CorporateTotal
Revenues:
Commissions$6,694 $— $— $6,694 
Fees2,193 1,414 — 3,607 
Supplemental revenues359 — — 359 
Contingent revenues268 — — 268 
Interest income, premium finance revenues and other income420 37 16 473 
Revenues before reimbursements9,934 1,451 16 11,401 
Reimbursements— 154 — 154 
Total revenues9,934 1,605 16 11,555 
Compensation5,502 882 138 6,522 
Operating1,363 279 112 1,754 
Reimbursements— 154 — 154 
Interest— — 381 381 
Depreciation133 38 178 
Amortization651 14 — 665 
Change in estimated acquisition earnout payables26 — — 26 
Total expenses7,675 1,367 638 9,680 
Earnings (loss) before income taxes2,259 238 (622)1,875 
Provision (benefit) for income taxes573 63 (232)404 
Net earnings (loss)1,686 175 (390)1,471 
Net earnings (loss) attributable to noncontrolling interests— — 
Net earnings (loss) attributable to controlling interests$1,678 $175 $(390)$1,463 
Net foreign exchange gain (loss)$$— $(1)$— 
Revenues:
United States$6,104 $1,308 $16 $7,428 
United Kingdom2,168 57 — 2,225 
Australia349 226 — 575 
Canada409 — 416 
New Zealand203 — 210 
Other foreign701 — — 701 
Total revenues$9,934 $1,605 $16 $11,555 
At December 31, 2024
Identifiable assets:
United States$20,910 $1,110 $16,029 $38,049 
United Kingdom16,051 150 — 16,201 
Australia1,767 382 — 2,149 
Canada1,684 — 1,690 
New Zealand719 14 — 733 
Other foreign5,308 — 125 5,433 
Total identifiable assets$46,439 $1,662 $16,154 $64,255 
Goodwill - net$11,923 $328 $19 $12,270 
Amortizable intangible assets - net4,413 117 — 4,530 
Year Ended December 31, 2023BrokerageRisk
Management
CorporateTotal
Revenues:
Commissions$5,865 $— $— $5,865 
Fees1,885 1,260 — 3,145 
Supplemental revenues314 — — 314 
Contingent revenues235 — — 235 
Interest income, premium finance revenues and other income338 28 368 
Revenues before reimbursements8,637 1,288 9,927 
Reimbursements— 145 — 145 
Total revenues8,637 1,433 10,072 
Compensation4,769 777 135 5,681 
Operating1,272 257 160 1,689 
Reimbursements— 145 — 145 
Interest— — 297 297 
Depreciation124 36 165 
Amortization524 — 532 
Change in estimated acquisition earnout payables377 — 378 
Total expenses7,066 1,224 597 8,887 
Earnings (loss) before income taxes1,571 209 (595)1,185 
Provision (benefit) for income taxes402 55 (238)219 
Net earnings (loss)1,169 154 (357)966 
Net earnings (loss) attributable to noncontrolling interests— (10)(4)
Net earnings (loss) attributable to controlling interests$1,163 $154 $(347)$970 
Net foreign exchange (loss)$— $(10)$— $(10)
Revenues:
United States$5,216 $1,209 $$6,427 
United Kingdom1,946 47 — 1,993 
Australia312 155 — 467 
Canada398 — 404 
New Zealand192 16 — 208 
Other foreign573 — — 573 
Total revenues$8,637 $1,433 $$10,072 
At December 31, 2023
Identifiable assets:
United States$21,764 $1,026 $2,521 $25,311 
United Kingdom16,000 130 — 16,130 
Australia1,969 469 — 2,438 
Canada1,693 — 1,697 
New Zealand773 20 — 793 
Other foreign5,247 — — 5,247 
Total identifiable assets$47,446 $1,649 $2,521 $51,616 
Goodwill - net$11,218 $239 $19 $11,476 
Amortizable intangible assets - net4,428 205 — 4,633 
v3.25.4
Schedule II. Valuation and Qualifying Accounts
12 Months Ended
Dec. 31, 2025
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]  
Schedule II. Valuation and Qualifying Accounts Schedule II
Arthur J. Gallagher & Co.
Valuation and Qualifying Accounts
Balance at
Beginning
of Year
Amounts
Recorded in
Earnings
AdjustmentsBalance at
End
of Year
(In millions)
Year ended December 31, 2025
Allowance for credit losses on trade receivables and accounts receivables$22 $15 $12 (1)$49 
Allowance for estimated policy cancellations13 (2)23 
Valuation allowance for deferred tax assets177 87 — 264 
Accumulated amortization of expiration
lists, non-compete agreements and trade names4,472 916 181 (3)5,569 
Year ended December 31, 2024
Allowance for credit losses on trade receivables and accounts receivables$23 $12 $(13)(1)$22 
Allowance for estimated policy cancellations10 — (2)13 
Valuation allowance for deferred tax assets196 (19)— 177 
Accumulated amortization of expiration
lists, non-compete agreements and trade names3,874 665 (67)(3)4,472 
Year ended December 31, 2023
Allowance for credit losses on trade receivables and accounts receivables$11 $26 $(14)(1)$23 
Allowance for estimated policy cancellations— (2)10 
Valuation allowance for deferred tax assets135 61 — 196 
Accumulated amortization of expiration
lists, non-compete agreements and trade names3,300 532 42 (3)3,874 
_______________________________________________________________
(1)Net activity of receivable write offs and recoveries and allowances from acquired businesses.
(2)Net activity to allowance related to acquired businesses.
(3)Elimination of fully amortized expiration lists, non-compete agreements and trade names, intangible asset/amortization reclassifications and disposal of acquired businesses.
v3.25.4
Pay vs Performance Disclosure - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Pay vs Performance Disclosure      
Net earnings attributable to controlling interests $ 1,494 $ 1,463 $ 970
v3.25.4
Insider Trading Arrangements
3 Months Ended
Dec. 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
v3.25.4
Insider Trading Policies and Procedures
12 Months Ended
Dec. 31, 2025
Insider Trading Policies and Procedures [Line Items]  
Insider Trading Policies and Procedures Adopted true
v3.25.4
Cybersecurity Risk Management and Strategy Disclosure
12 Months Ended
Dec. 31, 2025
Cybersecurity Risk Management, Strategy, and Governance [Line Items]  
Cybersecurity Risk Management Processes for Assessing, Identifying, and Managing Threats [Text Block]
Item 1C. Cybersecurity.
We have implemented a cybersecurity program to assess, identify, and manage risks from cybersecurity threats that could adversely and materially affect the confidentiality, integrity, and availability of our information and information systems. We maintain administrative, technical, and physical safeguards designed to protect the security and privacy of confidential, personal and proprietary information. Our cybersecurity program is aligned with notable control frameworks such as the NIST CSF (National Institute of Standards and Technology Cybersecurity Framework) and ISO (International Organization for Standardization) 27001.
Our Chief Information Security Officer (which we refer to as our CISO), working together with our Chief Information Officer (which we refer to as our CIO), oversees a team of employees dedicated to cybersecurity. Our cybersecurity team includes Business Information Security Officers (which we refer to as BISOs) in each region to lead the cybersecurity program, and to communicate ongoing updates from the cybersecurity team regarding the prevention, detection, mitigation, and remediation of cybersecurity incidents.
Our CISO regularly reports to the CIO and is an active member of our management-level enterprise risk management committee, which has broad oversight of the company’s enterprise risks, including cybersecurity risks. In addition, our CIO and CISO both attend regular meetings of the executive officer team, including our Chief Executive Officer, Chief Financial Officer, General Counsel and other senior executive officers, dedicated to compliance and risk, and report on cybersecurity matters as appropriate. Our Board of Directors has delegated primary responsibility for the oversight of cybersecurity matters to its Risk and Compliance Committee; however, the full board reviews significant cybersecurity matters as appropriate. Our CIO and CISO report on cybersecurity and information security at each quarterly meeting of the Risk and Compliance Committee.
Our cybersecurity program leverages people, processes, and technology to identify and respond to cybersecurity threats. We have a global incident response capability supported by our Security Operations Center (which we refer to as SOC) team, a managed security service provider (MSSP), ReliaQuest, and our global Cybersecurity Incident Response Team (which we refer to as CSIRT), which provides threat detection and incident response. ReliaQuest supports the operation of Gallagher’s SOC, and performs triage and escalation of event data from the security information and event management (which we refer to as SIEM) solution. This support enables 24x7 monitoring and allows Gallagher to address threats and/or detections with urgency. We have rolled out additional security technologies for new acquisitions and extended our SOC to monitor acquisitions prior to integration. We have bolstered our internal cyber forensics capability to augment our Security
Operations capability to strengthen our ability to detect incidents, as well as to accelerate our response in parallel with our external partners.
We maintain a global cybersecurity incident response plan and related playbooks, for execution by the SOC team and CSIRT, in coordination with internal and external stakeholders, as applicable. Significant incidents are escalated to a cross-departmental team to assess materiality based on qualitative and quantitative factors. This team consists of executives representing core business functions, including, among others, information technology, legal, finance, accounting, data protection and business divisions, in consultation with third-party advisors, as applicable. We undertake periodic leadership tabletop exercises and periodic adversarial (“red team”) exercises simulating incident response under common risk scenarios. As an acquisitive organization, we have also established a program to increase our visibility into the cybersecurity environment of acquisition targets prior to closing.
Other technology partners provide additional solutions and services, including endpoint detection and response, data loss prevention, dark web monitoring, vulnerability management, next-generation firewalls, advanced web proxy, and other solutions. We have also partnered with a strategic vendor to enable acceleration of our efforts to build the cyber team and mitigate risk across the company. The relationship has brought both talent and flexibility to the team and has enabled acceleration of build-outs and integrations.
Identity management is a core component of our cyber program and solutions from Ping and Microsoft are in-place. We have also deployed a global Privileged Access Management solution, which resulted in the vaulting of all elevated user accounts that are subject to a more stringent set of controls tied to account use and duration. Additionally, we have implemented a cloud-based password reset tool offering users a highly secure and easy-to-use interface to reset passwords, regardless of device location, or browser.
Email security is a top priority for Gallagher, and we have implemented email threat detection and response services as well as capabilities to protect against phishing attacks and malicious links. Concurrently, we have rolled out phishing simulations targeted at increasing user awareness of common indicators of malicious messages. We have additionally implemented and are expanding coverage of advanced messaging features to prevent email compromise and data exfiltration, including deepfake detection and prevention.
We have established a dedicated vendor assessment team, which employs systems and processes designed to oversee, identify, and reduce the potential impact of a security incident at a third-party vendor, service provider or customer or that otherwise implicates the third-party technology and systems we use. We also require cybersecurity insurance coverage for vendors whose services or products may present a cybersecurity risk.
We continuously test and assess our cybersecurity posture, including through annual third-party risk assessments performed by reputable assessors, consultants and auditors. A global FAIR (Factor Analysis of Information Risk) assessment is conducted at least annually to update our cybersecurity risks and corresponding mitigations strategies. This process results in a quantitative understanding of our top cyber risks based on annualized loss expectancy. Our top risks, in turn, guide our prioritization of cybersecurity program maturation efforts to focus on initiatives offering Gallagher the greatest residual risk reduction.
Penetration testing is performed globally at least quarterly by our professional partners in cooperation with internal Gallagher teams. We also support leadership tabletop exercises and periodic adversarial (“red team”) exercises simulating incident response under common risk scenarios. These scenarios are updated regularly to resemble threat actor behavior trends revealed by our threat intelligence sources.
Our employees complete training on data security and our policies when they join us and annually thereafter. We review the content of our mandatory training annually and provide access to a comprehensive set of supplemental training to meet individual and role-specific needs.
As a global organization, Gallagher’s operational approach to data security and sensitive data such as PHI and PII ties to least privilege – limiting access to data, systems and applications that only align to a user’s role and responsibility. Identity management solutions and processes, such as regular user access reviews, govern the principle of least privilege. Policies inclusive of data classification and regulatory requirements for sensitive data handling mandate secure device and data handling practices, as well as controls such as an encryption and data loss prevention. Of note, Data Loss Prevention tooling has been implemented globally to monitor, prevent and detect data leakage.
Our CIO has more than 30 years of experience, including from his prior business and technology leadership roles at Aegon N.V., Citigroup, Inc. and JP Morgan Chase & Company. Our CISO has more than 20 years of cybersecurity experience. Prior to joining us, he was Senior Vice President, Chief Information Security Officer at Brighthouse Financial. Before then, he served as Technology Vice President & Chief Information Security Officer for GE Healthcare. He started his career at Allstate Insurance Company. He also holds security, privacy and risk certifications, including Certified Information Systems Auditor, Certified Information Security Manager and Certified Information Systems Security Professional.
Gallagher remains committed to maintaining and improving our existing security posture. We regularly monitor and assess the policies and procedures in place and continue to work with leading global cybersecurity investigation firms with expertise in data privacy incident response and containment.
We, including our third-party vendors, have experienced cybersecurity incidents and threats and may continue to experience them in the future. Based on the information available as of the date of this Annual Report on Form 10-K, we believe that during the last three fiscal years risks from cybersecurity threats, including as a result of previous cybersecurity incidents, have not materially affected us, including our business strategy, results of operations or financial condition, and as of the date of this Annual Report on Form 10-K, the Company is not aware of any material risks from cybersecurity threats that are reasonably likely to do so. However, we cannot eliminate all risks from cybersecurity threats or provide assurances that the Company will not be materially affected by such risks in the future. Due to evolving cybersecurity threats, we may not be able to protect all information systems and, as an acquisitive organization, integrating information systems as we acquire new businesses may expose us to unexpected liabilities or increase our vulnerability. There can be no guarantee that our policies, programs and controls, and those of our third-party vendors, including those described in this section, will be sufficient to protect our information, information systems or other property. Additional information on cybersecurity risks we face is discussed in Item 1A of Part I, “Risk Factors,” which should be read in conjunction with the foregoing information.
Cybersecurity Risk Management Processes Integrated [Flag] true
Cybersecurity Risk Management Processes Integrated [Text Block]
We have implemented a cybersecurity program to assess, identify, and manage risks from cybersecurity threats that could adversely and materially affect the confidentiality, integrity, and availability of our information and information systems. We maintain administrative, technical, and physical safeguards designed to protect the security and privacy of confidential, personal and proprietary information. Our cybersecurity program is aligned with notable control frameworks such as the NIST CSF (National Institute of Standards and Technology Cybersecurity Framework) and ISO (International Organization for Standardization) 27001.
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]
We, including our third-party vendors, have experienced cybersecurity incidents and threats and may continue to experience them in the future. Based on the information available as of the date of this Annual Report on Form 10-K, we believe that during the last three fiscal years risks from cybersecurity threats, including as a result of previous cybersecurity incidents, have not materially affected us, including our business strategy, results of operations or financial condition, and as of the date of this Annual Report on Form 10-K, the Company is not aware of any material risks from cybersecurity threats that are reasonably likely to do so. However, we cannot eliminate all risks from cybersecurity threats or provide assurances that the Company will not be materially affected by such risks in the future. Due to evolving cybersecurity threats, we may not be able to protect all information systems and, as an acquisitive organization, integrating information systems as we acquire new businesses may expose us to unexpected liabilities or increase our vulnerability. There can be no guarantee that our policies, programs and controls, and those of our third-party vendors, including those described in this section, will be sufficient to protect our information, information systems or other property. Additional information on cybersecurity risks we face is discussed in Item 1A of Part I, “Risk Factors,” which should be read in conjunction with the foregoing information.
Cybersecurity Risk Board of Directors Oversight [Text Block] Our Board of Directors has delegated primary responsibility for the oversight of cybersecurity matters to its Risk and Compliance Committee; however, the full board reviews significant cybersecurity matters as appropriate. Our CIO and CISO report on cybersecurity and information security at each quarterly meeting of the Risk and Compliance Committee.
Cybersecurity Risk Board Committee or Subcommittee Responsible for Oversight [Text Block]
Our Chief Information Security Officer (which we refer to as our CISO), working together with our Chief Information Officer (which we refer to as our CIO), oversees a team of employees dedicated to cybersecurity. Our cybersecurity team includes Business Information Security Officers (which we refer to as BISOs) in each region to lead the cybersecurity program, and to communicate ongoing updates from the cybersecurity team regarding the prevention, detection, mitigation, and remediation of cybersecurity incidents.
Our CISO regularly reports to the CIO and is an active member of our management-level enterprise risk management committee, which has broad oversight of the company’s enterprise risks, including cybersecurity risks. In addition, our CIO and CISO both attend regular meetings of the executive officer team, including our Chief Executive Officer, Chief Financial Officer, General Counsel and other senior executive officers, dedicated to compliance and risk, and report on cybersecurity matters as appropriate.
Cybersecurity Risk Process for Informing Board Committee or Subcommittee Responsible for Oversight [Text Block]
Our Chief Information Security Officer (which we refer to as our CISO), working together with our Chief Information Officer (which we refer to as our CIO), oversees a team of employees dedicated to cybersecurity. Our cybersecurity team includes Business Information Security Officers (which we refer to as BISOs) in each region to lead the cybersecurity program, and to communicate ongoing updates from the cybersecurity team regarding the prevention, detection, mitigation, and remediation of cybersecurity incidents.
Our CISO regularly reports to the CIO and is an active member of our management-level enterprise risk management committee, which has broad oversight of the company’s enterprise risks, including cybersecurity risks. In addition, our CIO and CISO both attend regular meetings of the executive officer team, including our Chief Executive Officer, Chief Financial Officer, General Counsel and other senior executive officers, dedicated to compliance and risk, and report on cybersecurity matters as appropriate. Our Board of Directors has delegated primary responsibility for the oversight of cybersecurity matters to its Risk and Compliance Committee; however, the full board reviews significant cybersecurity matters as appropriate. Our CIO and CISO report on cybersecurity and information security at each quarterly meeting of the Risk and Compliance Committee.
Cybersecurity Risk Role of Management [Text Block]
Our Chief Information Security Officer (which we refer to as our CISO), working together with our Chief Information Officer (which we refer to as our CIO), oversees a team of employees dedicated to cybersecurity. Our cybersecurity team includes Business Information Security Officers (which we refer to as BISOs) in each region to lead the cybersecurity program, and to communicate ongoing updates from the cybersecurity team regarding the prevention, detection, mitigation, and remediation of cybersecurity incidents.
Our CISO regularly reports to the CIO and is an active member of our management-level enterprise risk management committee, which has broad oversight of the company’s enterprise risks, including cybersecurity risks. In addition, our CIO and CISO both attend regular meetings of the executive officer team, including our Chief Executive Officer, Chief Financial Officer, General Counsel and other senior executive officers, dedicated to compliance and risk, and report on cybersecurity matters as appropriate. Our Board of Directors has delegated primary responsibility for the oversight of cybersecurity matters to its Risk and Compliance Committee; however, the full board reviews significant cybersecurity matters as appropriate. Our CIO and CISO report on cybersecurity and information security at each quarterly meeting of the Risk and Compliance Committee.
Cybersecurity Risk Management Positions or Committees Responsible [Flag] true
Cybersecurity Risk Management Positions or Committees Responsible [Text Block]
Our Chief Information Security Officer (which we refer to as our CISO), working together with our Chief Information Officer (which we refer to as our CIO), oversees a team of employees dedicated to cybersecurity. Our cybersecurity team includes Business Information Security Officers (which we refer to as BISOs) in each region to lead the cybersecurity program, and to communicate ongoing updates from the cybersecurity team regarding the prevention, detection, mitigation, and remediation of cybersecurity incidents.
Our CISO regularly reports to the CIO and is an active member of our management-level enterprise risk management committee, which has broad oversight of the company’s enterprise risks, including cybersecurity risks. In addition, our CIO and CISO both attend regular meetings of the executive officer team, including our Chief Executive Officer, Chief Financial Officer, General Counsel and other senior executive officers, dedicated to compliance and risk, and report on cybersecurity matters as appropriate. Our Board of Directors has delegated primary responsibility for the oversight of cybersecurity matters to its Risk and Compliance Committee; however, the full board reviews significant cybersecurity matters as appropriate. Our CIO and CISO report on cybersecurity and information security at each quarterly meeting of the Risk and Compliance Committee.
Cybersecurity Risk Management Expertise of Management Responsible [Text Block]
Our CIO has more than 30 years of experience, including from his prior business and technology leadership roles at Aegon N.V., Citigroup, Inc. and JP Morgan Chase & Company. Our CISO has more than 20 years of cybersecurity experience. Prior to joining us, he was Senior Vice President, Chief Information Security Officer at Brighthouse Financial. Before then, he served as Technology Vice President & Chief Information Security Officer for GE Healthcare. He started his career at Allstate Insurance Company. He also holds security, privacy and risk certifications, including Certified Information Systems Auditor, Certified Information Security Manager and Certified Information Systems Security Professional.
Cybersecurity Risk Process for Informing Management or Committees Responsible [Text Block]
Our Chief Information Security Officer (which we refer to as our CISO), working together with our Chief Information Officer (which we refer to as our CIO), oversees a team of employees dedicated to cybersecurity. Our cybersecurity team includes Business Information Security Officers (which we refer to as BISOs) in each region to lead the cybersecurity program, and to communicate ongoing updates from the cybersecurity team regarding the prevention, detection, mitigation, and remediation of cybersecurity incidents.
Our CISO regularly reports to the CIO and is an active member of our management-level enterprise risk management committee, which has broad oversight of the company’s enterprise risks, including cybersecurity risks. In addition, our CIO and CISO both attend regular meetings of the executive officer team, including our Chief Executive Officer, Chief Financial Officer, General Counsel and other senior executive officers, dedicated to compliance and risk, and report on cybersecurity matters as appropriate. Our Board of Directors has delegated primary responsibility for the oversight of cybersecurity matters to its Risk and Compliance Committee; however, the full board reviews significant cybersecurity matters as appropriate. Our CIO and CISO report on cybersecurity and information security at each quarterly meeting of the Risk and Compliance Committee.
Cybersecurity Risk Management Positions or Committees Responsible Report to Board [Flag] true
v3.25.4
Summary of Significant Accounting Policies (Policies)
12 Months Ended
Dec. 31, 2025
Accounting Policies [Abstract]  
Nature of Operations
Nature of Operations
Arthur J. Gallagher & Co. and its subsidiaries, collectively referred to herein as we, our, us or the Company, provide insurance brokerage, consulting and third party claims settlement and administration services to both domestic and international entities. We have three reportable segments: brokerage, risk management and corporate. Our brokers, agents and administrators act as intermediaries between underwriting enterprises and our clients.
Our brokerage segment operations provide brokerage and consulting services to entities of all types, including commercial, nonprofit, public sector entities and to a lesser extent, individuals, in the areas of insurance and reinsurance placements, risk of loss management and management of employer sponsored benefit programs. Our risk management segment operations provide contract claim settlement, claim administration, loss control services and risk management consulting for commercial, nonprofit, captive and public sector entities, and various other organizations that choose to self-insure property/casualty coverages or choose to use a third-party claims management organization rather than the claim services provided by underwriting enterprises. The corporate segment reports the financial information related to our debt, external acquisition‑related expenses, other corporate costs, the impact of foreign currency translation and clean energy investments.
We do not assume underwriting risk on a net basis, other than with respect to de minimis amounts necessary to provide minimum or regulatory capital insurance to organize captives, pools, specialized underwriters or risk-retention groups. Rather, capital necessary for covering losses is provided by underwriting enterprises.
Investment income and other revenues are primarily generated from our premium financing operations, our invested cash and restricted cash we hold on behalf of our clients, as well as clean energy investments. In addition, our share of the net earnings related to partially owned entities that are accounted for using the equity method is included in investment income.
Arthur J. Gallagher & Co., a global insurance brokerage, risk management and consulting services firm, is headquartered in Rolling Meadows, Illinois. The Company provides these services in approximately 130 countries around the world through its owned operations and a network of correspondent brokers and consultants.
Basis of Presentation
Basis of Presentation
The accompanying consolidated financial statements include our accounts and all of our majority-owned subsidiaries (50% or greater ownership). Substantially all of our investments in partially owned entities in which our ownership is less than 50% are accounted for using the equity method based on the legal form of our ownership interest and the applicable ownership percentage of the entity. However, in situations where a less than 50%-owned investment has been determined to be a variable interest entity and we are deemed to be the primary beneficiary in accordance with the variable interest model of consolidation, we will consolidate the investment into our consolidated financial statements. For partially owned entities accounted for using the equity method, our share of the net earnings of these entities is included in consolidated net earnings. All material intercompany accounts and transactions have been eliminated in consolidation.
In the preparation of our consolidated financial statements as of December 31, 2025, management evaluated all material subsequent events or transactions that occurred after the balance sheet date through the date on which the financial statements were issued for potential recognition and/or disclosure in the notes therein.
Use of Estimates
Use of Estimates
The preparation of our consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. These accounting principles require us to make estimates and assumptions that affect the reported amounts of assets and liabilities and revenues and expenses, and the disclosure of contingent assets and liabilities at the date of our consolidated financial statements. We periodically evaluate our estimates and assumptions, including those relating to the valuation of goodwill and other intangible assets, right-of-use assets, investments, income taxes, revenue recognition, deferred costs, stock-based compensation, claims handling obligations, retirement plans, litigation and contingencies. We base our estimates on historical experience and various assumptions that we believe to be reasonable based on specific circumstances. Such estimates and assumptions could change in the future as more information becomes known, which could impact the amounts reported and disclosed herein.
Revenue Recognition
Revenue Recognition
Our revenues are derived from commissions and fees as primarily specified in a written contract, or unwritten business understanding, with our clients or underwriting enterprises. We also recognize investment income over time from our invested assets and invested assets we hold on behalf of our clients or underwriting enterprises.
BROKERAGE SEGMENT and RISK MANAGEMENT SEGMENT
BROKERAGE SEGMENT
Our brokerage segment generates revenues by:
Identifying, negotiating and placing all forms of insurance (or insurance-like) coverage, as well as providing data analytics, risk-shifting, risk-sharing and risk-mitigation consulting services, principally related to property/casualty, life, health, welfare and disability insurance. We also provide these services through, or in conjunction with, other unrelated agents and brokers, consultants and management advisors;
Identifying, negotiating and placing all forms of reinsurance coverage, as well as providing capital markets services, including acting as underwriter, with respect to insurance linked securities, weather derivatives, capital raising and selected merger and acquisition advisory activities;
Acting as an agent or broker for multiple underwriting enterprises by providing services such as sales, marketing, selecting, negotiating, underwriting, servicing and placing insurance coverage on their behalf;
Providing consulting services related to health and welfare benefits, voluntary benefits, executive benefits, compensation, retirement planning, institutional investment and fiduciary, actuarial, compliance, private insurance exchange, human resource technology, communications and benefits administration; and
Providing management and administrative services to captives, pools, risk-retention groups, healthcare exchanges, small underwriting enterprises, such as accounting, claims and loss
processing assistance, feasibility studies, actuarial studies, data analytics and other administrative services.
The vast majority of our brokerage contracts and service understandings are for a period of one year or less.
Commissions and fees
The primary source of revenues for our brokerage services is commissions from underwriting enterprises, based on a percentage of premiums paid by our clients, or fees received from clients based on an agreed level of service usually in lieu of commissions. These commissions and fees revenues are substantially recognized at a point in time on the effective date of the associated policies when control of the policy transfers to the client, as well as deferring certain revenues to reflect delivery of services over the contract period.
Commissions are fixed at the contract effective date and generally are based on a percentage of premiums for insurance coverage or employee headcount for employer sponsored benefit plans. Commissions depend upon a large number of factors, including the type of risk being placed, the particular underwriting enterprise’s demand, the expected loss experience of the particular risk of coverage, and historical benchmarks surrounding the level of effort necessary for us to place and service the insurance contract. Rather than being tied to the amount of premiums, fees are most often based on an expected level of effort to provide our services.
Whether we are paid a commission or a fee, the vast majority of our services are associated with the placement of an insurance (or insurance-like) contract. Accordingly, we recognize approximately 85% of our commission and fee revenues on the effective date of the underlying insurance contract. The amount of revenue we recognize is based on our costs to provide our services up and through that effective date, including an appropriate estimate of our profit margin on a portfolio basis (a practical expedient as defined in Topic 606). Based on the proportion of additional services we provide in each period after the effective date of the insurance contract, including an appropriate estimate of our profit margin, we recognize approximately 10% of our commission and fee revenues in the first three months, and the remaining 5% thereafter. These periods may be different than the underlying premium payment patterns of the insurance contracts, but the vast majority of our services are fully provided within one year of the insurance contract effective date.
For consulting and advisory services, we recognize our revenue in the period in which we provide the service or advice. For management and administrative services, our revenue is recognized ratably over the contract period consistent with the performance of our obligations, mostly over an annual term.
Supplemental revenues
Certain underwriting enterprises may pay us additional revenues for the volume of premium placed with them and for insights into our sales pipeline, our sales capabilities or our risk selection knowledge. These amounts are in excess of the commission and fee revenues discussed above, and not all business we place with underwriting enterprises is eligible for supplemental revenues. Unlike contingent revenues, discussed below, these revenues are primarily a fixed amount or fixed percentage of premium of the underlying eligible insurance contracts. For supplemental revenue contracts based on a fixed percentage of premium, our obligation to the underwriting enterprise is substantially completed upon the effective date of the underlying insurance contract and revenue is fully earned at that time. For supplemental revenue contracts based on a fixed amount, revenue is recognized ratably over the contract period consistent with the performance of our obligations, almost always over an annual term. We receive these revenues on a quarterly or annual basis.
Contingent revenues
Certain underwriting enterprises may pay us additional revenues for our sales capabilities, our risk selection knowledge, or our administrative efficiencies. These amounts are in excess of the commission or fee revenues discussed above, and not all business we place with participating underwriting enterprises is eligible for contingent revenues. Unlike supplemental revenues, also discussed above, these revenues are variable, generally based on growth, the loss experience of the underlying insurance contracts, and/or our efficiency in processing the business. We generally operate under calendar year contracts, but we do not receive these revenues from the underwriting enterprises until the following calendar year, generally in the first and second quarters, after verification of the performance indicators outlined in the contracts. Accordingly, during each reporting period, we must make our best estimate of amounts we have earned using historical averages and other factors to project such revenues. We base our estimates each period on a contract-by-contract basis where available. In certain cases, it is impractical to assess a very large number of smaller contingent revenue contracts, so
we use a historical portfolio estimate in aggregate (a practical expedient as defined in Topic 606). Because our expectation of the ultimate contingent revenue amounts to be earned can vary from period to period, especially in contracts sensitive to loss ratios, our estimates might change significantly from quarter to quarter. For example, in circumstances where our revenues are dependent on a full calendar year loss ratio, adverse loss experience in the fourth quarter could not only negate revenue earnings in the fourth quarter, but also trigger the need to reverse revenues previously recognized during the prior quarters. Variable consideration is recognized when we conclude, based on all the facts and information available at the reporting date, that it is probable that a significant revenue reversal will not occur in future periods.
Sub-brokerage costs
Sub-brokerage costs are excluded from our gross revenues in our determination of total revenues. Sub-brokerage costs represent commissions paid to sub-brokers related to the placement of certain business by our brokerage segment operations. We recognize this contra revenue in the same manner as the commission revenue to which it relates.
RISK MANAGEMENT SEGMENT
Revenues for our risk management segment are comprised of fees generally negotiated (i) on a per-claim or per-service basis, (ii) on a cost‑plus basis, or (iii) as performance-based fees. We also provide risk management consulting services that are recognized as the services are delivered.
Per-claim or per-service fees
Where we operate under a contract with our fee established on a per-claim or per-service basis, our obligation is to process claims for a term specified within the contract. Because it is impractical to recognize our revenues on an individual claim-by-claim basis, we recognize revenue plus an appropriate estimate of our profit margin on a portfolio basis by grouping claims with similar characteristics (a practical expedient as defined in Topic 606). We apply actuarially-determined, historical-based patterns to determine our future service obligations, without applying a present value discount.
Cost-plus fees
Where we provide services and generate revenues on a cost-plus basis, we recognize revenue over the contract period consistent with the performance of our obligations.
Performance-based fees
Certain clients pay us additional fee revenues for our efficiency in managing claims or on the basis of claim outcome effectiveness. These amounts are in excess of the fee revenues discussed above. These revenues are variable, generally based on performance metrics set forth in the underlying contracts. We generally operate under multi-year contracts with fiscal year measurement periods. We do not receive these fees, if earned, until the following year after verification of the performance metrics outlined in the contracts. Each period we base our estimates on a contract-by-contract basis. We must make our best estimate of amounts we have earned using historical averages and other factors to project such revenues. Variable consideration is recognized when we conclude that it is probable that a significant revenue reversal will not occur in future periods.
Reimbursements
Reimbursements represent amounts received from clients reimbursing us for certain third-party costs associated with providing our claims management services. In certain service partner relationships, we are considered a principal because we direct the third party, control the specified service and combine the services provided into an integrated solution. Given this principal relationship, we are required to recognize revenue gross and service partner vendor fees in the operating expense in our consolidated statement of earnings.
Deferred Costs
Deferred Costs
We incur costs to provide brokerage and risk management services. Those costs are either (i) costs to obtain a contract or (ii) costs to fulfill such contract, or (iii) all other costs.
Costs to obtain - we incur costs to obtain a contract with a client. Those costs would not have been incurred if the contract had not been obtained. Almost all of
our costs to obtain are incurred prior to, or on, the effective date of the contract and consist primarily of incentive compensation we pay to our production employees. Our costs to obtain are expensed as incurred as described in Note 4 to these consolidated financial statements.
Costs to fulfill - we incur costs to fulfill a contract (or anticipated contract) with a client. Those costs are incurred prior to the effective date of the contract and relate to fulfilling our primary placement obligations to our clients. Our costs to fulfill prior to the effective date are capitalized and amortized on the effective date. These fulfillment activities include collecting underwriting information from our client, assessing their insurance needs and negotiating their placement with one or more underwriting enterprises. The majority of costs that we incur relate to compensation and benefits of our client service employees. Costs incurred during preplacement activities are expected to be recovered in the future. If the capitalized costs are no longer deemed to be recoverable, then they would be expensed.
Other costs that are not costs to obtain or fulfill are expensed as incurred. Examples include other operating costs such as rent, utilities, management costs, overhead costs, legal and other professional fees, technology costs, insurance related costs, communication and advertising, and travel and entertainment. Depreciation, amortization and change in estimated acquisition earnout payable are expensed as incurred.
Investment Income
Investment Income
Investment income primarily includes interest (including revenue from our premium financing operations) and dividend income, which is accrued as it is earned. Net gains on divestitures represent one-time gains related to sales of brokerage related businesses, which are primarily recognized on a cash received basis.
Earnings per Share
Earnings per Share
Basic net earnings per share is computed by dividing net earnings by the weighted average number of common shares outstanding during the reporting period. Diluted net earnings per share is computed by dividing net earnings by the weighted average number of common and common equivalent shares outstanding during the reporting period. Common equivalent shares include incremental shares from dilutive stock options, which are calculated from the date of grant under the treasury stock method using the average market price for the period.
Cash and Cash Equivalents
Cash and Cash Equivalents
Short-term investments, consisting principally of cash and money market accounts that have average maturities of 90 days or less, are considered cash equivalents.
Fiduciary Assets and Liabilities
Fiduciary Assets and Liabilities
Fiduciary assets represent cash held and insurance and reinsurance receivables that relate to our clients and are held on their behalf. Fiduciary liabilities represent the corresponding amounts that are owed to underwriting enterprises on behalf of our clients. In our capacity as an insurance broker, we collect premiums from insureds and, after deducting our commissions and/or fees, remit these premiums to underwriting enterprises. We hold unremitted insurance premiums in a fiduciary capacity until we disburse them, and the use of such funds is restricted by laws in certain states and foreign jurisdictions in which our subsidiaries operate. Various state and foreign agencies regulate insurance brokers and provide specific requirements that limit the type of investments that may be made with such funds. Accordingly, we invest these funds in cash and U.S. Treasury fund accounts. We can earn interest income on these unremitted funds, which is included in investment income in the accompanying consolidated statement of earnings. These unremitted amounts are included in fiduciary assets in the accompanying consolidated balance sheet, with the related liability included in fiduciary liabilities. Additionally, several of our foreign subsidiaries are required by various foreign agencies to meet certain liquidity and solvency requirements. We were in compliance with these requirements at December 31, 2025. This restricted cash is included in cash and cash equivalents net in the accompanying consolidated balance sheet.
Related to our third party administration business and in certain of our brokerage operations, we are responsible for client claim funds that we hold in a fiduciary capacity. We do not earn any interest income on the funds held. These client funds have been included in fiduciary assets, along with a corresponding liability in fiduciary liabilities in the accompanying consolidated balance sheet.
Accounts Receivable
Accounts Receivable
Accounts receivable, net in the accompanying consolidated balance sheet includes accrued agency billed commissions, fees, supplemental commissions, direct bill commissions and contingent commission receivables due to the Company. Accounts receivable are net of allowances for estimated policy cancellations and credit losses on trade receivables and accounts receivables. The allowance for estimated policy cancellations was $23 million and $13 million at December 31, 2025 and 2024, respectively, which represents a reserve for future reversals in commission and fee revenues related to the potential cancellation of client insurance policies that were in force as of each year end. The allowance for credit losses on trade receivables and accounts receivables was $49 million and $22 million at December 31, 2025 and 2024, respectively. We establish the allowance for estimated policy cancellations through a charge to revenues and the allowance for doubtful accounts through a charge to operating expenses. Both of these allowances are based on estimates and assumptions using historical data to project future experience. Such estimates and assumptions could change in the future as more information becomes known which could impact the amounts reported and disclosed herein. We periodically review the adequacy of these allowances and make adjustments as necessary.
Derivative Instruments
Derivative Instruments
We are exposed to market risks, including changes in foreign currency exchange rates and interest rates. To manage the risk related to these exposures, we enter into various derivative instruments that reduce these risks by creating offsetting exposures. In the normal course of business, we are exposed to the impact of foreign currency fluctuations that impact our results of operations and cash flows. We utilize a foreign currency risk management program involving foreign currency derivatives that consist of several monthly put/call options designed to hedge a portion of our future foreign currency disbursements through various future payment dates. To mitigate the counterparty credit risk we only enter into contracts with major financial institutions based upon their credit ratings and other factors. These derivative instrument contracts are cash flow hedges that qualify for hedge accounting and primarily hedge against fluctuations between changes in the British pound and Indian Rupee versus the U.S. dollar. Changes in fair value of the derivative instruments are reflected in other comprehensive earnings in the accompanying consolidated balance sheet. The impact of the hedge at maturity is recognized in the income statement as a component of investment income, compensation and operating expenses depending on the nature of the hedged item. We enter into various long-term debt agreements. We use interest rate derivatives, typically swaps, to reduce our exposure to the effects of interest rate fluctuations on the forecasted interest rates for up to three years into the future. These derivative instrument contracts are periodically monitored for hedge ineffectiveness, the amount of which has not been material to the accompanying consolidated financial statements. We do not use derivatives for trading or speculative purposes.
Premium Financing
Premium Financing
Seven subsidiaries of the brokerage segment make short-term loans (generally with terms of twelve months or less) to our clients to finance premiums. These premium financing contracts are structured to minimize potential bad debt expense to us. Such receivables are generally considered delinquent after seven days of the payment due date. In normal course, insurance policies are canceled within one month of the contractual payment due date if the payment remains delinquent. We recognize interest income as it is earned over the life of the contract using the “level-yield” method. Unearned interest related to contracts receivable is included in the receivable balance in the accompanying consolidated balance sheet. The outstanding loan receivable balance was $636 million and $616 million at December 31, 2025 and 2024, respectively.
Fixed Assets
Fixed Assets
We carry fixed assets at cost, less accumulated depreciation, in the accompanying consolidated balance sheet. We periodically review long-lived assets for impairment whenever events or changes in business circumstances indicate that the carrying value of the assets may not be recoverable. Under those circumstances, if the fair value were less than the carrying amount of the asset, we would recognize a loss for the difference. Depreciation for fixed assets is computed using the straight-line method over the following estimated useful lives:
Useful Life
Office equipment
Three to ten years
Furniture and fixtures
Two to ten years
Computer equipment
Three to five years
Building
Fifteen to forty years
Software
Three to five years
Leasehold improvementsShorter of the lease term or useful life of the asset
Intangible Assets
Intangible Assets
Intangible assets represent the excess of cost over the estimated fair value of net tangible assets of acquired businesses. Our primary intangible assets are classified as either goodwill, expiration lists, non-compete agreements or trade names. Expiration lists, non‑compete agreements and trade names are amortized using the straight-line method over their estimated useful lives (two to fifteen years for expiration lists, two to six years for non-compete agreements and two to fifteen years for trade names), while goodwill is not subject to amortization. The establishment of goodwill, expiration lists, non-compete agreements and trade names and the determination of estimated useful lives are primarily based on valuations we receive from qualified independent appraisers. The calculations of these amounts are based on estimates and assumptions using historical and projected financial information and recognized valuation methods. Different estimates or assumptions could produce different results. We carry identifiable intangible assets at cost, less accumulated amortization, in the accompanying consolidated balance sheet.
We review all of our intangible assets for impairment periodically (at least annually for goodwill) and whenever events or changes in business circumstances indicate that the carrying value of the assets may not be recoverable. We perform such impairment reviews at the division (i.e., reporting unit) level with respect to goodwill and at the business unit level for amortizable intangible assets. While goodwill is not amortizable, it is tested for impairment at least annually in the fourth quarter, and more frequently if there are indicators of impairment or whenever business circumstances suggest that the carrying value of goodwill may not be recoverable. We may initially perform a qualitative analysis to determine if it is more likely than not that the goodwill balance is impaired. If a qualitative assessment is not performed or if a determination is made that it is not more likely than not that the fair value of the reporting unit exceeds its carrying amount, then we will perform a quantitative analysis. The fair value of each reporting unit is compared to its carrying value. If the fair value of the reporting unit is less than its carrying value, a non-cash impairment charge is recognized for the amount by which the carrying value exceeds the reporting unit’s fair value with the loss not exceeding the total amount of goodwill allocated to that reporting unit. We completed our 2025 annual assessment in the fourth quarter and concluded goodwill was not impaired, as the fair value of each reporting unit exceeded its carrying value.
The carrying value of amortizable intangible assets attributable to each business or asset group is periodically reviewed by management to determine if there are events or changes in circumstances that would indicate that its carrying amount may not be recoverable. Accordingly, if there are any such changes in circumstances during the year, we assess the carrying value of the amortizable intangible assets by considering the estimated future undiscounted cash flows generated by the corresponding business or asset group. Any impairment identified through this assessment may require that the carrying value of related amortizable intangible assets be adjusted and charged against current period earnings as a component of amortization expense. Based on the results of impairment reviews in 2025, 2024 and 2023, we wrote off $66 million, $19 million and $4 million, respectively, of amortizable intangible assets primarily related to acquisitions (made prior to 2024) of our brokerage and risk management segments, which is included in amortization expense in the accompanying consolidated statement of earnings. The determinations of impairment indicators and fair value are based on estimates and assumptions related to the amount and timing of future cash flows and future interest rates. Such estimates and assumptions could change in the future as more information becomes known which could impact the amounts reported and disclosed herein.
Income Taxes
Income Taxes
Our tax rate reflects the statutory tax rates applicable to our taxable earnings and tax planning in the various jurisdictions in which we operate. Significant judgment is required in determining the annual effective tax rate and in evaluating uncertain tax positions. We report a liability for unrecognized tax benefits resulting from uncertain tax positions taken or expected to be taken in our tax return. We evaluate our tax positions using a two-step process. The first step involves recognition. We determine whether it is more likely than not that a tax position will be sustained upon tax examination based solely on the
technical merits of the position. The technical merits of a tax position are derived from both statutory and judicial authority (legislation and statutes, legislative intent, regulations, rulings and case law) and their applicability to the facts and circumstances of the position. If a tax position does not meet the “more likely than not” recognition threshold, we do not recognize the benefit of that position in the financial statements. The second step is measurement. A tax position that meets the “more likely than not” recognition threshold is measured to determine the amount of benefit to recognize in the financial statements. The tax position is measured as the largest amount of benefit that has a likelihood of greater than 50% of being realized upon ultimate resolution with a taxing authority.
Uncertain tax positions are measured based upon the facts and circumstances that exist at each reporting period and involve significant management judgment. Subsequent changes in judgment based upon new information may lead to changes in recognition, derecognition and measurement. Adjustments may result, for example, upon resolution of an issue with the taxing authorities, or expiration of a statute of limitations barring an assessment for an issue. We recognize interest and penalties, if any, related to unrecognized tax benefits in our provision for income taxes.
Tax law requires certain items to be included in our tax returns at different times than such items are reflected in the financial statements. As a result, the annual tax expense reflected in our consolidated statements of earnings is different than that reported in our tax returns. Some of these differences are permanent, such as expenses that are not deductible in our tax returns, and some differences are temporary and reverse over time, such as depreciation expense and amortization expense deductible for income tax purposes. Temporary differences create deferred tax assets and liabilities. Deferred tax liabilities generally represent tax expense recognized in the financial statements for which a tax payment has been deferred, or expense which has been deducted in the tax return but has not yet been recognized in the financial statements. Deferred tax assets generally represent items that can be used as a tax deduction or credit in tax returns in future years for which a benefit has already been recorded in the financial statements.
We establish or adjust valuation allowances for deferred tax assets when we estimate that it is more likely than not that future taxable income will be insufficient to fully use a deduction or credit in a specific jurisdiction. In assessing the need for the recognition of a valuation allowance for deferred tax assets, we consider whether it is more likely than not that some portion, or all, of the deferred tax assets will not be realized and adjust the valuation allowance accordingly. We evaluate all significant available positive and negative evidence as part of our analysis. Negative evidence includes the existence of losses in recent years. Positive evidence includes the forecast of future taxable income by jurisdiction, tax-planning strategies that would result in the realization of deferred tax assets and the presence of taxable income in prior carryback years. The underlying assumptions we use in forecasting future taxable income require significant judgment and take into account our recent performance. Such estimates and assumptions could change in the future as more information becomes known which could impact the amounts reported and disclosed herein. The ultimate realization of deferred tax assets depends on the generation of future taxable income during the periods in which temporary differences are deductible or creditable.
Fair Value of Financial Instruments
Fair Value of Financial Instruments
Fair value accounting establishes a framework for measuring fair value, which is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (i.e., an exit price). This framework includes a fair value hierarchy that prioritizes the inputs to the valuation technique used to measure fair value.
The classification of a financial instrument within the valuation hierarchy is based upon the transparency of inputs to the valuation of an asset or liability on the measurement date. The three levels of the hierarchy in order of priority of inputs to the valuation technique are defined as follows:
Level 1 - Valuations are based on unadjusted quoted prices in active markets for identical financial instruments;
Level 2 - Valuations are based on quoted market prices, other than quoted prices included in Level 1, in markets that are not active or on inputs that are observable either directly or indirectly for the full term of the financial instrument; and
Level 3 - Valuations are based on pricing or valuation techniques that require inputs that are both unobservable and significant to the overall fair value measurement of the financial instrument. Such inputs may reflect management’s own assumptions about the assumptions a market participant would use in pricing the financial instrument.
The level in the fair value hierarchy within which the fair value measurement is classified is determined based on the lowest level input that is significant to the fair value measure in its entirety.
The carrying amounts of financial assets and liabilities reported in the accompanying consolidated balance sheet for cash and cash equivalents, fiduciary assets, accounts receivable, other current assets, fiduciary liabilities, accrued compensation and other accrued liabilities and deferred revenue - current, at December 31, 2025 and 2024, approximate fair value because of the short-term duration of these instruments. See Note 3 to these consolidated financial statements for the fair values related to the establishment of intangible assets and the establishment and adjustment of earnout payables. See Note 7 to these consolidated financial statements for the fair values related to borrowings outstanding at December 31, 2025 and 2024 under our debt agreements. See Note 12 to these consolidated financial statements for the fair values related to investments at December 31, 2025 and 2024 under our defined benefit pension plan.
Litigation
Litigation
We are the defendant in various legal actions related to claims, lawsuits and proceedings incidental to the nature of our business. We record liabilities for loss contingencies, including legal costs (such as fees and expenses of external lawyers and other service providers) to be incurred, when it is probable that a liability has been incurred on or before the balance sheet date and the amount of the liability can be reasonably estimated. We do not discount such contingent liabilities. To the extent recovery of such losses and legal costs is probable under our insurance programs, we record estimated recoveries concurrently with the losses recognized. Significant management judgment is required to estimate the amounts of such contingent liabilities and the related insurance recoveries. In order to assess our potential liability, we analyze our litigation exposure based on available information, including consultation with outside counsel handling the defense of these matters. As these liabilities are uncertain by their nature, the recorded amounts may change due to a variety of different factors, including new developments in, or changes in approach, such as changing the settlement strategy as applicable to each matter.
Retention Bonus Arrangements
Retention Bonus Arrangements
In connection with the hiring and retention of both new talent and experienced personnel, including our senior management, brokers and other key personnel, we have entered into various agreements with key employees setting up the conditions for the cash payment of certain retention bonuses. These bonuses are an incentive for these employees to remain with the Company, for a fixed period of time, to allow us to capitalize on their knowledge and experience. We have various forms of retention bonus arrangements; some are paid up front and some are paid at the end of the term, but all are contingent upon successfully completing a minimum period of employment. A retention bonus that is paid to an employee upfront that is contingent on a certain minimum period of employment, will be initially classified as a prepaid asset and amortized to compensation expense as the future services are rendered over the duration of the stay period. A retention bonus that is paid to an employee at the end of the term that is contingent on a certain minimum period of employment, will be accrued as a liability through compensation expense as the future services are rendered over the duration of the stay period. If an employee leaves prior to the required time frame to earn the retention bonus outright, then all or any portion that is ultimately unearned or refundable, and recovered by the Company if prepaid, is forfeited and reversed through compensation expense.
Stock-Based Compensation
Stock-Based Compensation
We have several employee equity-settled and cash-settled share-based compensation plans. Equity-settled share-based payments to employees include grants of stock options, performance stock units and restricted stock units and are measured based on estimated grant date fair value. We have elected to use the Black-Scholes option pricing model to determine the fair value of stock options on the dates of grant. Performance stock units are measured on the probable outcome of the performance conditions applicable to each grant. Restricted stock units are measured based on the fair market values of the underlying stock on the dates of grant. Shares are issued on the vesting dates net of the minimum statutory tax withholding requirements, as applicable, to be paid by us on behalf of our employees. As a result, the actual number of shares issued will be fewer than the actual number of performance stock units and restricted stock units outstanding. Furthermore, we record the liability for withholding amounts to be paid by us as a reduction to additional paid-in capital when paid.
Cash-settled share-based payments to employees include awards under our Performance Unit Program and stock appreciation rights. The fair value of the amount payable to employees in respect of cash-settled share-based payments is recognized as compensation expense, with a corresponding increase in liabilities, over the vesting period. The liability is
remeasured at each reporting date and at settlement date. Any changes in fair value of the liability are recognized as compensation expense.
We recognize share-based compensation expense over the requisite service period for awards expected to ultimately vest. Forfeitures are estimated on the date of grant and revised if actual or expected forfeiture activity differs from original estimates.
Employee Stock Purchase Plan
Employee Stock Purchase Plan
We have an employee stock purchase plan (which we refer to as the ESPP), under which the sale of 8 million shares of our common stock has been authorized. Eligible employees may contribute up to 15% of their compensation towards the quarterly purchase of our common stock at a purchase price equal to 95% of the lesser of the fair market value of our common stock on the first business day or the last business day of the quarterly offering period. Eligible employees may annually purchase shares of our common stock with an aggregate fair market value of up to $25,000 (measured as of the first day of each quarterly offering period of each calendar year), provided that no employee may purchase more than 2,000 shares of our common stock under the ESPP during any calendar year. At December 31, 2025, 4.4 million shares of our common stock was reserved for future issuance under the ESPP.
Defined Benefit Pension Plans
Defined Benefit Pension Plans
We recognize in our consolidated balance sheet, an asset for our defined benefit pension plans’ overfunded status or a liability for our plans’ underfunded status. We recognize changes in the funded status of our defined benefit pension plans in comprehensive earnings in the year in which the changes occur. We use December 31 as the measurement date for our plans’ assets and benefit obligations. See Note 12 to these consolidated financial statements for additional information required to be disclosed related to our defined benefit pension plans.
Effect of New Accounting Pronouncements Effect of New Accounting Pronouncements
Income Taxes
In December 31, 2023, the FASB issued ASU No. 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures, which requires that an entity, on an annual basis, disclose additional income tax information, primarily related to the rate reconciliation and income taxes paid. The amendment in the ASU is intended to enhance the transparency and decision usefulness of income tax disclosures. We adopted this ASU as of December 31, 2025, which affected our income taxes disclosure. See Note 16 to these consolidated financial statements for further detail regarding the impact of this ASU.
Disaggregation of Income Statement Expenses
In November 2024, the FASB issued ASU 2024-03, Income Statement Reporting–Comprehensive Income–Expense Disaggregation Disclosures (Subtopic 220-40), Disaggregation of Income Statement Expenses. The standard update improves the disclosures about a public business entity’s expenses by requiring more detailed information about the types of expenses (including purchases of inventory, employee compensation, depreciation and amortization) included within income statement expense captions. The guidance will be effective for annual reporting periods beginning after December 15, 2026, and interim reporting periods beginning after December 15, 2027. Early adoption is permitted. The standard updates are to be applied prospectively with the option for retrospective application. We are currently evaluating the impact of adoption of the standard update on its financial statement disclosures.
Accounting for Internal-Use Software
In September 2025, the FASB issued ASU 2025-06, Intangibles-Goodwill and Other-Internal-Use Software (Subtopic 350-40): Targeted Improvements to the Accounting for Internal-Use Software, which amends the guidance in ASC 350-40. The amendments modernize the recognition and disclosure requirements for internal-use software costs, introducing a more judgment-based approach while removing the previous “development stage” model. The amendment in the ASU is effective for all entities for fiscal years beginning after December 15, 2027, and interim periods within those fiscal years, with early adoption permitted. Entities may apply the guidance using a prospective, retrospective or modified transition approach. We are currently evaluating the impact of adoption of the standard update on our financial statement disclosures.
v3.25.4
Summary of Significant Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2025
Accounting Policies [Abstract]  
Summary of Estimated Useful Life of Fixed Assets Depreciation for fixed assets is computed using the straight-line method over the following estimated useful lives:
Useful Life
Office equipment
Three to ten years
Furniture and fixtures
Two to ten years
Computer equipment
Three to five years
Building
Fifteen to forty years
Software
Three to five years
Leasehold improvementsShorter of the lease term or useful life of the asset
v3.25.4
Business Combinations (Tables)
12 Months Ended
Dec. 31, 2025
Business Combinations [Abstract]  
Acquisition Method for Recording Business Combinations These acquisitions have been accounted for using the acquisition method for recording business combinations (in millions, except share data):
Name and Effective Date of AcquisitionCommon
Shares
Issued
Common
Share
Value
Cash
Paid
Accrued
Liability
Escrow
Deposited
Recorded
Earnout
Payable
Total
Recorded
Purchase
Price
Maximum
Potential
Earnout
Payable
(000s)
W K Webster & Co Ltd
   February 1, 2025 (WKW)
$— $139 $$— $14 $155 $29 
Case Group
   February 26, 2025 (CSG)
— 58 14 81 84 
Woodruff Sawyer & Co
   April 10, 2025 (WSC)
— 1,195 12 67 — 1,274 — 
Dolphin TopCo, Inc., the holding company of AssuredPartners, Inc.,
      August 18, 2025 (APG)
— 13,515 — 300 — 13,815 — 
Tompkins Insurance
   Agencies, Inc.
      October 31, 2025 (TIA)
— 225 — — 233 — 
First Actuarial, LLP
   November 27, 2025 (FAC)
— 101 46 158 26 
Twenty-seven other acquisitions completed in 2025
6416 502 19 22 73 632 150 
64$16 $15,735 $48 $441 $108 $16,348 $289 
Summary of Estimated Fair Values of Net Assets Acquired
The following is a summary of the estimated fair values of the net assets acquired at the date of each acquisition made in 2025 (in millions):
WKWCSGWSCAPGTIAFAC
Twenty-seven Other
Acquisitions
Total
Cash and cash equivalents$$$62 $276 $13 $$30 $400 
Fiduciary assets87 — 465 1,032 — 55 1,646 
Other current assets17 79 938 23 20 1,088 
Fixed assets13 134 — 154 
Noncurrent assets— 25 237 — 268 
Goodwill100 59 823 8,376 82 97 367 9,904 
Expiration lists54 25 459 5,993 135 47 307 7,020 
Non-compete agreements— — — — 10 19 
Trade names— 27 — — — 37 
Total assets acquired270 96 1,934 17,013 246 185 792 20,536 
Fiduciary liabilities87 — 465 1,032 — 55 1,646 
Current liabilities12 41 933 10 18 1,027 
Noncurrent liabilities16 154 1,233 — 17 87 1,515 
Total liabilities assumed115 15 660 3,198 13 27 160 4,188 
Total net assets acquired$155 $81 $1,274 $13,815 $233 $158 $632 $16,348 
Summary of Unaudited Pro Forma Historical Results The following is a summary of the unaudited pro forma historical results, as if these entities had been acquired at January 1, 2024 (in millions, except per share data):
Year Ended December 31,
20252024
Total revenues$16,256 $15,024 
Net earnings attributable to controlling interests1,623 1,474 
Basic net earnings per share6.34 5.81 
Diluted net earnings per share6.24 5.71 
v3.25.4
Contracts with Customers (Tables)
12 Months Ended
Dec. 31, 2025
Revenue from Contract with Customer [Abstract]  
Summary of Unbilled Receivables, Contract Assets and Contract Liabilities from Contracts with Customers
Information about unbilled receivables, contract assets and contract liabilities from contracts with customers is as follows (in millions):
December 31, 2025December 31, 2024
Unbilled receivables$1,858 $1,274 
Deferred contract costs338 207 
Deferred revenue892 604 
Summary of Changes in Deferred Revenue Balances
Significant changes in the deferred revenue balances, which include foreign currency translation adjustments, during the period are as follows (in millions):
BrokerageRisk
Management
Total
Deferred revenue at December 31, 2023$533 $172 $705 
Incremental deferred revenue305 91 396 
Revenue recognized during the year ended December 31, 2024 included in deferred revenue at December 31, 2023(390)(86)(476)
Net change in collected billings/deposits received from customers(40)(4)(44)
Impact of changes in foreign exchange rates— — — 
Deferred revenue recognized from business acquisitions23 — 23 
Deferred revenue at December 31, 2024431 173 604 
Incremental deferred revenue296 112 408 
Revenue recognized during the year ended December 31, 2025 included in deferred revenue at December 31, 2024(335)(88)(423)
Net change in collected billings/deposits received from customers(4)(2)
Impact of changes in foreign exchange rates(21)— (21)
Deferred revenue recognized from business acquisitions326 — 326 
Deferred revenue at December 31, 2025$693 $199 $892 
Summary of Expected Revenue Related to Performance Obligations
The estimated revenue expected to be recognized in the future related to performance obligations that are unsatisfied (or partially unsatisfied) at the end of the reporting period is as follows (in millions):
BrokerageRisk
Management
Total
2026$668 $47 $715 
202722 77 99 
202835 36 
202917 18 
2030— 
Thereafter15 16 
Total$693 $199 $892 
v3.25.4
Fixed Assets (Tables)
12 Months Ended
Dec. 31, 2025
Property, Plant and Equipment [Abstract]  
Summary of Fixed Assets
Major classes of fixed assets consist of the following (in millions):
December 31,
20252024
Office equipment$53 $34 
Furniture and fixtures215 152 
Leasehold improvements326 260 
Computer equipment439 362 
Land and buildings - corporate headquarters174 172 
Software942 721 
Other42 41 
Work in process80 64 
2,271 1,806 
Accumulated depreciation(1,482)(1,156)
Net fixed assets$789 $650 
v3.25.4
Intangible Assets (Tables)
12 Months Ended
Dec. 31, 2025
Goodwill and Intangible Assets Disclosure [Abstract]  
Carrying Amount of Goodwill Allocated by Domestic and Foreign Operations
The carrying amount of goodwill at December 31, 2025 and 2024 allocated by domestic and foreign operations is as follows (in millions):
BrokerageRisk
Management
CorporateTotal
At December 31, 2025
United States$16,428 $109 $— $16,537 
United Kingdom2,889 142 — 3,031 
Canada628 — — 628 
Australia591 238 — 829 
New Zealand225 — 233 
Other foreign1,317 — 18 1,335 
Total goodwill - net$22,078 $497 $18 $22,593 
At December 31, 2024
United States$6,966 $75 $— $7,041 
United Kingdom2,591 26 — 2,617 
Canada587 — — 587 
Australia509 219 — 728 
New Zealand183 — 191 
Other foreign1,087 — 19 1,106 
Total goodwill - net$11,923 $328 $19 $12,270 
Changes in Carrying Amount of Goodwill
The changes in the carrying amount of goodwill for 2025 and 2024 are as follows (in millions):
BrokerageRisk
Management
CorporateTotal
Balance as of December 31, 2023$11,218 $239 $19 $11,476 
Goodwill acquired during the year830 — 837 
Goodwill adjustments related to appraisals and other acquisition adjustments98 101 — 199 
Goodwill written-off related to sales of business(6)— — (6)
Foreign currency translation adjustments during the year(217)(19)— (236)
Balance as of December 31, 202411,923 328 19 12,270 
Goodwill acquired during the year9,770 134 — 9,904 
Goodwill adjustments related to appraisals and other acquisition adjustments32 — 41 
Goodwill written-off related to sales of business(20)— — (20)
Foreign currency translation adjustments during the year373 26 (1)398 
46022$22,078 $497 $18 $22,593 
Major Classes of Amortizable Intangible Assets
Major classes of amortizable intangible assets consist of the following (in millions):
December 31,
20252024
Expiration lists$15,968 $8,764 
Accumulated amortization - expiration lists(5,357)(4,313)
10,611 4,451 
Non-compete agreements125 118 
Accumulated amortization - non-compete agreements(98)(86)
27 32 
Trade names160 120 
Accumulated amortization - trade names(114)(73)
46 47 
Net amortizable assets$10,684 $4,530 
Estimated Aggregate Amortization Expense
Estimated aggregate amortization expense for each of the next five years is as follows (in millions):
2026$1,105 
20271,071 
20281,028 
2029973 
2030917 
Thereafter5,590 
Total$10,684 
v3.25.4
Credit and Other Debt Agreements (Tables)
12 Months Ended
Dec. 31, 2025
Debt Disclosure [Abstract]  
Summary of Corporate and Other Debt
The following is a summary of our corporate and other debt (in millions):
December 31,
20252024
Senior Notes:
Semi-annual payments of interest, fixed rate of 4.60%, balloon due December 15, 2027
$750 $750 
Semi-annual payments of interest, fixed rate of 4.85%, balloon due December 15, 2029
750 750 
Semi-annual payments of interest, fixed rate of 2.40%, balloon due November 9, 2031
400 400 
Semi-annual payments of interest, fixed rate of 5.00%, balloon due February 15, 2032
500 500 
Semi-annual payments of interest, fixed rate of 5.50%, balloon due March 2, 2033
350 350 
Semi-annual payments of interest, fixed rate of 6.50%, balloon due February 15, 2034
400 400 
Semi-annual payments of interest, fixed rate of 5.45%, balloon due July 15, 2034
500 500 
Semi-annual payments of interest, fixed rate of 5.15%, balloon due February 15, 2035
1,500 1,500 
Semi-annual payments of interest, fixed rate of 3.50%, balloon due May 20, 2051
850 850 
Semi-annual payments of interest, fixed rate of 3.05%, balloon due March 9, 2052
350 350 
Semi-annual payments of interest, fixed rate of 5.75%, balloon due March 2, 2053
600 600 
Semi-annual payments of interest, fixed rate of 6.75%, balloon due February 15, 2054
600 600 
Semi-annual payments of interest, fixed rate of 5.75%, balloon due July 15, 2054
500 500 
Semi-annual payments of interest, fixed rate of 5.55%, balloon due February 15, 2055
1,500 1,500 
Total Senior Notes9,550 9,550 
Note Purchase Agreements:
Semi-annual payments of interest, fixed rate of 4.31%, balloon due June 24, 2025
— 200 
Semi-annual payments of interest, fixed rate of 4.85%, balloon due February 13, 2026
140 140 
Semi-annual payments of interest, fixed rate of 4.73%, balloon due February 27, 2026
175 175 
Semi-annual payments of interest, fixed rate of 4.40%, balloon due June 2, 2026
175 175 
Semi-annual payments of interest, fixed rate of 4.36%, balloon due June 24, 2026
150 150 
Semi-annual payments of interest, fixed rate of 3.75%, balloon due January 30, 2027
30 30 
Semi-annual payments of interest, fixed rate of 4.09%, balloon due June 27, 2027
125 125 
Semi-annual payments of interest, fixed rate of 4.09%, balloon due August 2, 2027
125 125 
Semi-annual payments of interest, fixed rate of 4.14%, balloon due August 4, 2027
98 98 
Semi-annual payments of interest, fixed rate of 3.46%, balloon due December 1, 2027
100 100 
Semi-annual payments of interest, fixed rate of 4.55%, balloon due June 2, 2028
75 75 
Semi-annual payments of interest, fixed rate of 4.34%, balloon due June 13, 2028
125 125 
Semi-annual payments of interest, fixed rate of 5.04%, balloon due February 13, 2029
100 100 
Semi-annual payments of interest, fixed rate of 4.98%, balloon due February 27, 2029
100 100 
Semi-annual payments of interest, fixed rate of 4.19%, balloon due June 27, 2029
50 50 
Semi-annual payments of interest, fixed rate of 4.19%, balloon due August 2, 2029
50 50 
Semi-annual payments of interest, fixed rate of 3.48%, balloon due December 2, 2029
50 50 
Semi-annual payments of interest, fixed rate of 3.99%, balloon due January 30, 2030
341 341 
Semi-annual payments of interest, fixed rate of 4.44%, balloon due June 13, 2030
125 125 
Semi-annual payments of interest, fixed rate of 5.14%, balloon due March 13, 2031
180 180 
Semi-annual payments of interest, fixed rate of 4.70%, balloon due June 2, 2031
25 25 
Semi-annual payments of interest, fixed rate of 4.09%, balloon due January 30, 2032
69 69 
Semi-annual payments of interest, fixed rate of 4.34%, balloon due June 27, 2032
75 75 
Semi-annual payments of interest, fixed rate of 4.34%, balloon due August 2, 2032
75 75 
Semi-annual payments of interest, fixed rate of 4.59%, balloon due June 13, 2033
125 125 
Semi-annual payments of interest, fixed rate of 5.29%, balloon due March 13, 2034
40 40 
Semi-annual payments of interest, fixed rate of 4.48%, balloon due June 12, 2034
175 175 
Semi-annual payments of interest, fixed rate of 4.24%, balloon due January 30, 2035
79 79 
Semi-annual payments of interest, fixed rate of 2.44%, balloon due February 10, 2036
100 100 
Semi-annual payments of interest, fixed rate of 2.46%, balloon due May 5, 2036
75 75 
Semi-annual payments of interest, fixed rate of 4.69%, balloon due June 13, 2038
75 75 
Semi-annual payments of interest, fixed rate of 5.45%, balloon due March 13, 2039
40 40 
Semi-annual payments of interest, fixed rate of 4.49%, balloon due January 30, 2040
56 56 
Total Note Purchase Agreements3,323 3,523 
Credit Agreement:
Periodic payments of interest and principal, expires April 3, 2030
— — 
Premium Financing Debt Facility - expires October 31, 2027:
Facility B
AUD denominated tranche, interbank rates plus 1.300%
217 218 
NZD denominated tranche, interbank rates plus 1.850%
— — 
Facility C and D
AUD denominated tranche, interbank rates plus 0.780%
— — 
NZD denominated tranche, interbank rates plus 0.990%
Total Premium Financing Debt Facility226 225 
Total corporate and other debt13,099 13,298 
Less unamortized debt acquisition costs on Senior Notes and Note Purchase Agreements(81)(90)
Less unamortized discount on Bonds Payable(48)(51)
Net corporate and other debt$12,970 $13,157 
The Senior Notes in the table above are registered by the Company with the Securities and Exchange Commission and are not guaranteed.
v3.25.4
Earnings Per Share (Tables)
12 Months Ended
Dec. 31, 2025
Earnings Per Share [Abstract]  
Computation of Basic and Diluted Net EPS
The following table sets forth the computation of basic and diluted net earnings per share (in millions, except per share data):
Year Ended December 31,
202520242023
Net earnings attributable to controlling interests$1,494 $1,463 $970 
Weighted average number of common shares outstanding256.1 220.5 214.9 
Dilutive effect of stock options using the treasury stock method4.0 4.5 4.4 
Weighted average number of common and common equivalent shares outstanding260.1 225.0 219.3 
Basic net earnings per share$5.83 $6.63 $4.51 
Diluted net earnings per share$5.74 $6.50 $4.42 
v3.25.4
Stock Option Plans (Tables)
12 Months Ended
Dec. 31, 2025
Share-Based Payment Arrangement [Abstract]  
Black-Scholes Option Pricing Model with Weighted Average
For purposes of expense recognition in 2025, 2024 and 2023, the estimated fair values of the stock option grants are amortized to expense over the options’ vesting period. We estimated the fair value of stock options at the date of grant using the Black-Scholes option pricing model with the following weighted average assumptions:
Year Ended December 31,
202520242023
Expected dividend yield0.8 %1.0 %1.2 %
Expected risk-free interest rate4.1 %4.2 %3.6 %
Volatility25.4 %25.3 %25.0 %
Expected life (in years)5.55.55.5
Stock Option Activity and Related Information
The following is a summary of our stock option activity and related information for 2025 and 2024 (in millions, except exercise price and year data):
Shares
Under
Option
Weighted
Average
Exercise
Price
Weighted
Average
Remaining
Contractual
Term
(in years)
Aggregate
Intrinsic
Value
Year Ended December 31, 2025
Beginning balance7.3$148.26 
Granted0.8337.75 
Exercised(1.2)104.78 
Forfeited or canceled(0.2)196.67 
Ending balance6.7$177.48 3.43$609 
Exercisable at end of year2.2$111.16 1.71$320 
Ending unvested and expected to vest4.3$206.25 4.20$279 
Year Ended December 31, 2024
Beginning balance7.9$123.85 
Granted1.0243.54 
Exercised(1.4)77.93 
Forfeited or canceled(0.2)160.87 
Ending balance7.3$148.26 3.78$995 
Exercisable at end of year1.7$90.06 1.78$337 
Ending unvested and expected to vest5.2$164.49 4.40$624 
Other Information Regarding Stock Options Outstanding and Exercisable
Other information regarding stock options outstanding and exercisable at December 31, 2025 is summarized as follows (in millions, except exercise price and year data):
Range of Exercise PricesOptions OutstandingOptions Exercisable
Number
Outstanding
Weighted
Average
Remaining
Contractual
Term
(in years)
Weighted
Average
Exercise
Price
Number
Exercisable
Weighted
Average
Exercise
Price
$79.59 $— $79.59 $0.3 $0.20$79.59 $0.3 $79.59 
86.17 — 86.17 0.8 1.1986.17 0.8 86.17 
127.90 — 127.90 1.1 2.21127.90 0.7 127.90 
156.85 — 156.85 0.8 3.09156.85 0.2 156.85 
158.56 — 161.14 0.9 3.21158.64 0.2 158.59 
177.09 — 202.13 1.0 4.20177.77 — — 
238.88 — 243.54 1.0 5.16243.54 — — 
337.74 — 347.44 0.8 6.16337.75 — — 
$79.59 $— $347.44 $6.7 $3.43$177.48 $2.2 $111.16 
v3.25.4
Restricted Stock, Performance Share and Cash Awards (Tables)
12 Months Ended
Dec. 31, 2025
Share-Based Payment Arrangement [Abstract]  
Schedule of Restricted Stock Awards Vesting Periods
The vesting periods of the 2025, 2024 and 2023 restricted stock unit awards are as follows (in actual shares):
Restricted Stock Units Granted
Vesting Period202520242023
One year6,2106,8007,360
Five years298,499348,445389,553
Total shares granted304,709355,245396,913
v3.25.4
Retirement Plans (Tables)
12 Months Ended
Dec. 31, 2025
Retirement Benefits [Abstract]  
Reconciliation of Balances of Pension Benefit Obligation and Fair Value of Plan Assets A reconciliation of the beginning and ending balances of the pension benefit obligation and fair value of plan assets and the funded status of the plan is as follows (in millions):
Year Ended December 31,
20252024
Change in pension benefit obligation:
Benefit obligation at beginning of year$296 $216 
Service cost
Interest cost16 10 
Merger of the Buck U.S. pension plan— 95 
Net actuarial loss (gain)(11)
Settlement(293)— 
Benefits paid(19)(15)
Benefit obligation at end of year$$296 
Change in plan assets:
Fair value of plan assets at beginning of year$312 $229 
Actual return on plan assets19 15 
Merger of the Buck U.S. pension plan— 84 
Contributions by the Company— 
Settlement(293)— 
Benefits paid(19)(16)
Fair value of plan assets at end of year$20 $312 
Funded status of the plan$17 $16 
Amounts recognized in the consolidated balance sheet consist of:
Prepaid pension asset$17 $16 
Accumulated other comprehensive income— 18 
Net amount included in retained earnings$17 $34 
Components of Net Periodic Pension Benefit Cost and Other Changes in Plan Assets and Obligations Recognized in Earnings and Other Comprehensive Earnings
The components of the net periodic pension benefit cost for the plan and other changes in plan assets and obligations recognized in earnings and other comprehensive earnings consist of the following (in millions):
Year Ended December 31,
202520242023
Net periodic pension cost:
Service cost$$$
Interest cost on benefit obligation16 10 11 
Expected return on plan assets(15)(16)(14)
Amortization of net loss— 
Settlement16 — — 
Net periodic benefit income (cost)18 (2)
Other changes in plan assets and obligations recognized in other comprehensive earnings:
Net (gain) incurred(2)(10)(12)
Amortization of net loss(16)(3)(5)
Total recognized in other comprehensive (loss)(18)(13)(17)
Total recognized in net periodic pension cost and other comprehensive (loss)$— $(15)$(12)
Weighted Average Assumptions of Pension Benefit Obligation and Net Periodic Pension Benefit Cost
The following weighted average assumptions were used at December 31 in determining the plan’s pension benefit obligation:
December 31,
20252024
Discount rateN/A5.50 %
Weighted average expected long-term rate of return on plan assets5.00 %7.00 %
The following weighted average assumptions were used at January 1 in determining the plan’s net periodic pension benefit cost:
Year Ended December 31,
202520242023
Discount rate5.50 %4.75 %5.25 %
Weighted average expected long-term rate of return on plan assets5.00 %7.00 %7.00 %
Schedule of Benefit Payments Expected to be Paid by Plan
The following benefit payments are expected to be paid by the plan (in millions):
2026$17 
2027— 
2028— 
2029— 
2030— 
2030 to 2034— 
Summary of Plans Weighted Average Asset Allocations
The following is a summary of the plan’s weighted average asset at December 31 by asset category:
December 31,
Asset Category20252024
Equity securities%%
Debt securities100 %100 %
Real estate%%
Total100 %100 %
Summary of Plan's Assets Carried at Fair Value
The following is a summary of the plan’s assets carried at fair value as of December 31 by level within the fair value hierarchy (in millions):
December 31,
Fair Value Hierarchy20252024
Level 1$— $— 
Level 218 205 
Level 3107 
Total fair value$20 $312 
Reconciliation of Beginning and Ending Balances for Level 3 Assets of Plan Measured at Fair Value
The following is a reconciliation of the beginning and ending balances for the Level 3 assets of the plan measured at fair value (in millions):
Year Ended December 31,
20252024
Fair value at January 1$107 $109 
Settlements(111)(11)
Unrealized gain
Fair value at December 31$$107 
v3.25.4
Leases (Tables)
12 Months Ended
Dec. 31, 2025
Leases [Abstract]  
Components of Lease Expense
The components of lease expense are as follows (in millions):
Lease ComponentsStatement of Earnings
Classification
Year ended
December 31, 2025
Operating lease expenseOperating expense$167 
Variable lease expenseOperating expense32 
Sublease incomeInvestment income(2)
Total net lease expense$197 
Summary of Supplemental Cash Flow Information Related to Leases
Year ended
Supplemental Cash Flow Information Related to Leases (in millions)December 31, 2025
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases$155 
Right-of-use assets obtained in exchange for new operating lease liabilities$343 
Summary of Supplemental Balance Sheet Information Related to Leases
Supplemental balance sheet information related to leases is as follows (in millions, except lease term and discount rate):
Lease ComponentsBalance Sheet ClassificationDecember 31, 2025
Lease right-of-use assetsRight-of-use assets$598 
Other current lease liabilitiesAccrued compensation and other current liabilities131 
Lease liabilitiesLease liabilities - noncurrent515 
Total lease liabilities$646 
Weighted-average remaining lease term, years6.1
Weighted-average discount rate4.9 %
Maturities of Operating Lease Liabilities
Maturities of operating lease liabilities for each of the next five years and thereafter are as follows (in millions):
2026$173 
2027148 
2028111 
202984 
203073 
Thereafter184 
Total lease payments773 
Less interest(127)
Total$646 
v3.25.4
Derivatives and Hedging Activity (Tables)
12 Months Ended
Dec. 31, 2025
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Summary of Notional and Fair Values of Derivative Instruments
The notional and fair values of derivatives designated as hedging instruments are as follows at December 31, 2025 and 2024 (in millions):
Derivative AssetsDerivative Liabilities
InstrumentNotional
Amount
Balance Sheet
Classification
Fair
Value
Balance Sheet
Classification
Fair
Value
At December 31, 2025
Interest rate contracts$1,500 Other current assets$Accrued compensation and$
Other noncurrent assets— other current liabilities
Other noncurrent liabilities— 
Foreign exchange contracts (1)399 Other current assetsAccrued compensation and
other current liabilities
Other noncurrent assetsOther noncurrent liabilities
Total$1,899 $23 $12 
At December 31, 2024
Interest rate contracts$— Other current assets$— Accrued compensation and$— 
Other noncurrent assets— other current liabilities
Other noncurrent liabilities— 
Foreign exchange contracts (1)24 Other current assetsAccrued compensation and
other current liabilities
Other noncurrent assetsOther noncurrent liabilities
Total$24 $$
(1)Included within foreign exchange contracts at December 31, 2025 were $790 million of call options offset with $790 million of put options, and no buy forwards, offset with $399 million of sell forwards. Included within foreign exchange contracts at December 31, 2024 were $595 million of call options offset with $595 million of put options, and $1 million of buy forwards offset with $26 million of sell forwards.
Summary of Amounts of Derivative Gains (Losses) Recognized In Accumulated Other Comprehensive Loss
The effect of cash flow hedge accounting on accumulated other comprehensive loss were as follows (in millions):
InstrumentAmount of
Gain (Loss)
Recognized in
Accumulated
Other
Comprehensive
Loss (1)
Amount of
Gain (Loss)
Reclassified
from
Accumulated
Other
Comprehensive
Loss into
Earnings
Amount of
Gain (Loss)
Recognized
in Earnings
Related to
Amount
Excluded
from
Effectiveness
Testing
Statement of Earnings
Classification
Year ended December 31, 2025
Interest rate contracts$(16)$(1)$— Interest expense
Foreign exchange contracts(5)(13)— Commission revenue
(1)Compensation expense
(1)— Operating expense
Total$(21)$(16)$
Year ended December 31, 2024
Interest rate contracts$(6)$(1)$— Interest expense
Foreign exchange contracts(11)(2)— Commission revenue
(2)Compensation expense
(2)— Operating expense
Total$(17)$(7)$
(1)During 2025, the amount excluded from the assessment of hedge effectiveness for our foreign exchange contracts recognized in accumulated other comprehensive loss was a gain of $2 million.
v3.25.4
Commitments, Contingencies and Off-Balance Sheet Arrangements (Tables)
12 Months Ended
Dec. 31, 2025
Commitments and Contingencies Disclosure [Abstract]  
Contractual Obligations Our future minimum cash payments, including interest, associated with our contractual obligations pursuant to the Senior Notes, Note purchase agreements, Credit Agreement, Premium Financing Debt Facility, operating leases and purchase commitments at December 31, 2025 were as follows (in millions):
Payments Due by Period
Contractual Obligations20262027202820292030ThereafterTotal
Senior Notes$— $750 $— $750 $— $8,050 $9,550 
Note purchase agreements640 478 200 350 466 1,189 3,323 
Credit Agreement— — — — — — — 
Premium Financing Debt Facility226 — — — — — 226 
Interest on debt612 593 539 528 473 6,117 8,862 
Total debt obligations1,478 1,821 739 1,628 939 15,356 21,961 
Operating lease obligations173 148 111 84 73 184 773 
Less sublease arrangements(3)(2)(2)(2)— — (9)
Outstanding purchase obligations278 227 101 50 26 42 724 
Total contractual obligations$1,926 $2,194 $949 $1,760 $1,038 $15,582 $23,449 
Off-Balance Sheet Commitments
Off-Balance Sheet Commitments - Our total unrecorded commitments associated with outstanding letters of credit, financial guarantees and funding commitments at December 31, 2025 were as follows (in millions):
Amount of Commitment Expiration by PeriodTotal
Amounts
Committed
Off-Balance Sheet Commitments20262027202820292030Thereafter
Letters of credit$— $— $— $— $— $14 $14 
Financial guarantees— — — — — 50 50 
Total commitments$— $— $— $— $— $64 $64 
Outstanding Letters of Credit and Funding Commitments
Our commitments associated with outstanding letters of credit, financial guarantees and funding commitments at December 31, 2025 were as follows (all dollar amounts in table are in millions):
Description, Purpose and TriggerCollateralCompensation
to Us
Maximum
Exposure
Liability
Recorded
Credit support under letters of credit (LOC) for deductibles due by us on our own insurance coverages - expires 2028NoneNone$— $11 
Trigger - We do not reimburse the insurance companies for deductibles the insurance companies advance on our behalf
Credit enhancement under letters of credit for our captive insurance operations to meet minimum statutory capital requirements - expires 2028NoneReimbursement of LOC fees13 — 
Trigger - Dissolution or catastrophic financial results of the operation
Collateral related to claims funds held in a fiduciary capacity by a recent acquisition - expires 2028NoneNone— 
Trigger - Claim payments are not made
$14 $11 
(1)The guarantees are collateralized by shares in minority holdings of our Canadian operating companies.
v3.25.4
Income Taxes (Tables)
12 Months Ended
Dec. 31, 2025
Income Tax Disclosure [Abstract]  
Components of Earnings Before Income Taxes and Provision for Income Taxes Significant components of earnings before income taxes and the provision for income taxes are as follows (in millions):
Year Ended December 31,
202520242023
Earnings before income taxes:
United States$1,211 $972 $605 
Foreign, principally Australia, Canada, New Zealand and the U.K.660 903 580 
Total earnings before income taxes$1,871 $1,875 $1,185 
Provision for income taxes:
Federal:
Current$39 $38 $(22)
Deferred94 112 113 
133 150 91 
State and local:
Current42 53 (15)
Deferred(8)(1)43 
34 52 28 
Foreign:
Current224 194 213 
Deferred(23)(113)
201 202 100 
Provision for income taxes$368 $404 $219 
Reconciliation of Provision for Income Taxes with Federal Statutory Income Tax Rate
We have adopted ASU 2023-09 using a prospective transition method. A reconciliation of the provision for income taxes with the U.S. federal statutory income tax rate is as follows (in millions, except percentages):
Year Ended December 31,
2025
Amount% of Pretax
Earnings
U.S. federal statutory income tax$393 21.0 %
Domestic federal:
Tax credits
(19)(1.0)
Non taxable / nondeductible items
Excess tax benefits on share-based payments
(77)(4.1)
Nondeductible executive compensation (IRC 162(m))24 1.3 
Other 0.3 
Cross-border tax laws
Income (loss) from branches / disregarded entities (1)(57)(3.1)
Other16 0.9 
Changes in valuation allowance (2)41 2.2 
Other (2)(51)(2.7)
Domestic state and local income taxes, net of federal benefits *25 1.3 
Foreign tax effects:
U.K.:
Nontaxable / nondeductible items
Earnout liability adjustments22 1.2 
Other37 2.0 
Other foreign jurisdiction (3)0.1 
Changes in unrecognized tax benefits0.4 
Provision for income taxes$368 19.7 %
(1)Includes foreign tax credit benefits of $33 million.
(2)In 2025, we completed the sale of the Pronto Group that resulted in a $40 million U.S. federal capital loss. A valuation allowance was recorded against the related deferred tax asset; therefore, no income tax benefit was recognized, and deferred tax assets associated with the transaction were written off.
(3)We have determined that none of the remaining foreign jurisdictions for which there are foreign tax effects reconciling items meet the 5% threshold in any of the years presented.
* In 2025, state and local income taxes in California, New York, Pennsylvania, Florida and New Jersey comprised the majority of the state and local income taxes, net of federal effect category.
The following is a reconciliation of the U.S. federal statutory income tax rate to our effective rate for the years 2024 and 2023 in accordance with the guidance prior to the adoption of ASU 2023-09 (in millions, except percentages):
Year Ended December 31,
20242023
Amount% of Pretax
Earnings
Amount% of Pretax
Earnings
Federal statutory rate$394 21.0 %$249 21.0 %
State income taxes - net of federal benefit61 3.3 50 4.2 
Differences related to non U.S. operations(14)(0.7)(21)(1.7)
Alternative energy and other tax credits(9)(0.5)(8)(0.7)
Other permanent differences43 2.3 27 2.3 
Stock-based compensation(89)(4.7)(76)(6.4)
Changes in unrecognized tax benefits0.4 12 1.0 
Change in valuation allowance10 0.5 0.3 
Change in tax rates— (18)(1.5)
Provision for income taxes$404 21.6 %$219 18.5 %
Gross Unrecognized Tax Benefits
A reconciliation of the beginning and ending balances of the total amounts of gross unrecognized tax benefits is as follows (in millions):
December 31,
20252024
Gross unrecognized tax benefits at January 1$25 $25 
Increases in tax positions for current year
Settlements— (3)
Lapse in statute of limitations(1)(5)
Increases in tax positions for prior years17 
Decreases in tax positions for prior years— (10)
Gross unrecognized tax benefits at December 31$30 $25 
Deferred Tax Assets and Liabilities Significant components of our deferred tax assets and liabilities are as follows (in millions):
December 31,
20252024
Deferred tax assets:
Tax credit carryforwards$713 $772 
Accrued and unfunded compensation and employee benefits494 356 
Amortizable intangible assets560 177 
Compensation expense related to equity plans113 97 
Accrued liabilities176 126 
Depreciable fixed assets— 22 
Net operating loss carryforwards270 163 
Capital loss carryforwards56 
Interest expense limitation174 
Lease liabilities166 106 
Revenue recognition— 
Other
Total deferred tax assets2,729 1,837 
Valuation allowance for deferred tax assets(264)(177)
Deferred tax assets2,465 1,660 
Deferred tax liabilities:
Nondeductible amortizable intangible assets2,372 647 
Accrued pension liability
Depreciable fixed assets22 — 
Right-of-use assets154 97 
Hedging instruments34 36 
Other prepaid items30 16 
Revenue recognition124 — 
Other
Total deferred tax liabilities2,742 807 
Net deferred tax (liabilities) assets$(277)$853 
v3.25.4
Supplemental Disclosures of Cash Flow Information (Tables)
12 Months Ended
Dec. 31, 2025
Cash and Cash Equivalents [Abstract]  
Supplemental Disclosures of Cash Flow Information
Year ended December 31,
Supplemental disclosures of cash flow information (in millions):202520242023
Interest paid$575 $347 $271 
Income taxes paid, net341 331 226 
Year ended December 31,
Income taxes paid (in millions)2025
Federal$42 
State
California19 
Other38 
Foreign
U.K.117 
Australia31 
New Zealand26 
Other68 
Total foreign242 
Income taxes paid, net$341 
Summary of Cash, Cash Equivalents, Restricted Cash and Fiduciary Cash
The following is a reconciliation of our end of period cash, cash equivalents, restricted cash and fiduciary cash balances as presented in the consolidated statement of cash flows for the years ended December 31, 2025, 2024 and 2023 (in millions):
December 31,
202520242023
Cash and cash equivalents - non-restricted cash$1,155 $14,759 $781 
Cash and cash equivalents - restricted cash241 228 190 
Total cash and cash equivalents$1,396 $14,987 $971 
Fiduciary cash7,142 5,481 5,572 
Total cash, cash equivalents, restricted cash and fiduciary cash$8,538 $20,468 $6,543 
v3.25.4
Accumulated Other Comprehensive Loss (Tables)
12 Months Ended
Dec. 31, 2025
Equity [Abstract]  
Schedule of Accumulated Other Comprehensive Loss Attributable to Controlling Interests
The after-tax components of our accumulated comprehensive loss attributable to controlling interests consist of the following (in millions):
Pension
Liability
Foreign
Currency
Translation
Fair Value
of Derivative
Instruments
Accumulated
Comprehensive
Loss
Balance as of January 1, 2022$(49)$(1,125)$34 $(1,140)
Net change in period12 258 78 348 
Balance as of December 31, 2023(37)(867)112 (792)
Net change in period14 (365)(8)(359)
Balance as of December 31, 2024(23)(1,232)104 (1,151)
Net change in period— 630 (4)626 
Balance as of December 31, 2025$(23)$(602)$100 $(525)
v3.25.4
Segment Information (Tables)
12 Months Ended
Dec. 31, 2025
Segment Reporting [Abstract]  
Schedule of Segment Reporting Information by Segment
Financial information relating to our segments for 2025, 2024 and 2023 is as follows (in millions):
Year Ended December 31, 2025BrokerageRisk
Management
CorporateTotal
Revenues:
Commissions$8,024 $— $— $8,024 
Fees2,646 1,549 — 4,195 
Supplemental revenues466 — — 466 
Contingent revenues324 — — 324 
Interest income, premium finance revenues and other income732 36 769 
Revenues before reimbursements12,192 1,585 13,778 
Reimbursements— 164 — 164 
Total revenues12,192 1,749 13,942 
Compensation6,660 974 208 7,842 
Operating1,676 298 284 2,258 
Reimbursements— 164 — 164 
Interest— — 639 639 
Depreciation159 40 206 
Amortization894 22 — 916 
Change in estimated acquisition earnout payables44 — 46 
Total expenses9,433 1,500 1,138 12,071 
Earnings (loss) before income taxes2,759 249 (1,137)1,871 
Provision (benefit) for income taxes707 66 (405)368 
Net earnings (loss)2,052 183 (732)1,503 
Net earnings (loss) attributable to noncontrolling interests— — 
Net earnings (loss) attributable to controlling interests$2,043 $183 $(732)$1,494 
Net foreign exchange (loss)$(5)$(1)$(48)$(54)
Revenues:
United States$8,003 $1,387 $$9,391 
United Kingdom2,372 105 — 2,477 
Australia344 242 — 586 
Canada387 — 395 
New Zealand207 — — 207 
Other foreign879 — 886 
Total revenues$12,192 $1,749 $$13,942 
At December 31, 2025
Identifiable assets:
United States$25,203 $1,335 $16,701 $43,239 
United Kingdom15,161 443 — 15,604 
Australia1,919 460 — 2,379 
Canada1,731 — 1,740 
New Zealand776 — 784 
Other foreign6,755 19 145 6,919 
Total identifiable assets$51,545 $2,274 $16,846 $70,665 
Goodwill - net$22,078 $497 $18 $22,593 
Amortizable intangible assets - net10,483 201 — 10,684 
Year Ended December 31, 2024BrokerageRisk
Management
CorporateTotal
Revenues:
Commissions$6,694 $— $— $6,694 
Fees2,193 1,414 — 3,607 
Supplemental revenues359 — — 359 
Contingent revenues268 — — 268 
Interest income, premium finance revenues and other income420 37 16 473 
Revenues before reimbursements9,934 1,451 16 11,401 
Reimbursements— 154 — 154 
Total revenues9,934 1,605 16 11,555 
Compensation5,502 882 138 6,522 
Operating1,363 279 112 1,754 
Reimbursements— 154 — 154 
Interest— — 381 381 
Depreciation133 38 178 
Amortization651 14 — 665 
Change in estimated acquisition earnout payables26 — — 26 
Total expenses7,675 1,367 638 9,680 
Earnings (loss) before income taxes2,259 238 (622)1,875 
Provision (benefit) for income taxes573 63 (232)404 
Net earnings (loss)1,686 175 (390)1,471 
Net earnings (loss) attributable to noncontrolling interests— — 
Net earnings (loss) attributable to controlling interests$1,678 $175 $(390)$1,463 
Net foreign exchange gain (loss)$$— $(1)$— 
Revenues:
United States$6,104 $1,308 $16 $7,428 
United Kingdom2,168 57 — 2,225 
Australia349 226 — 575 
Canada409 — 416 
New Zealand203 — 210 
Other foreign701 — — 701 
Total revenues$9,934 $1,605 $16 $11,555 
At December 31, 2024
Identifiable assets:
United States$20,910 $1,110 $16,029 $38,049 
United Kingdom16,051 150 — 16,201 
Australia1,767 382 — 2,149 
Canada1,684 — 1,690 
New Zealand719 14 — 733 
Other foreign5,308 — 125 5,433 
Total identifiable assets$46,439 $1,662 $16,154 $64,255 
Goodwill - net$11,923 $328 $19 $12,270 
Amortizable intangible assets - net4,413 117 — 4,530 
Year Ended December 31, 2023BrokerageRisk
Management
CorporateTotal
Revenues:
Commissions$5,865 $— $— $5,865 
Fees1,885 1,260 — 3,145 
Supplemental revenues314 — — 314 
Contingent revenues235 — — 235 
Interest income, premium finance revenues and other income338 28 368 
Revenues before reimbursements8,637 1,288 9,927 
Reimbursements— 145 — 145 
Total revenues8,637 1,433 10,072 
Compensation4,769 777 135 5,681 
Operating1,272 257 160 1,689 
Reimbursements— 145 — 145 
Interest— — 297 297 
Depreciation124 36 165 
Amortization524 — 532 
Change in estimated acquisition earnout payables377 — 378 
Total expenses7,066 1,224 597 8,887 
Earnings (loss) before income taxes1,571 209 (595)1,185 
Provision (benefit) for income taxes402 55 (238)219 
Net earnings (loss)1,169 154 (357)966 
Net earnings (loss) attributable to noncontrolling interests— (10)(4)
Net earnings (loss) attributable to controlling interests$1,163 $154 $(347)$970 
Net foreign exchange (loss)$— $(10)$— $(10)
Revenues:
United States$5,216 $1,209 $$6,427 
United Kingdom1,946 47 — 1,993 
Australia312 155 — 467 
Canada398 — 404 
New Zealand192 16 — 208 
Other foreign573 — — 573 
Total revenues$8,637 $1,433 $$10,072 
At December 31, 2023
Identifiable assets:
United States$21,764 $1,026 $2,521 $25,311 
United Kingdom16,000 130 — 16,130 
Australia1,969 469 — 2,438 
Canada1,693 — 1,697 
New Zealand773 20 — 793 
Other foreign5,247 — — 5,247 
Total identifiable assets$47,446 $1,649 $2,521 $51,616 
Goodwill - net$11,218 $239 $19 $11,476 
Amortizable intangible assets - net4,428 205 — 4,633 
v3.25.4
Summary of Significant Accounting Policies - Additional Information (Detail)
12 Months Ended
Dec. 31, 2025
USD ($)
segment
country
subsidiary
shares
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Significant Accounting Policies [Line Items]      
Number of reportable segments | segment 3    
Number of countries in which the company does business through a network of correspondent brokers and consultants | country 130    
Percentage of commission and fee revenues on the effective date 85.00%    
Percentage of commission and fee revenues in the first three months 10.00%    
Percentage of commission and fee revenues after the first three months 5.00%    
Allowances for estimated policy cancellations $ 23,000,000 $ 13,000,000  
Allowance for doubtful accounts $ 49,000,000 22,000,000  
Maximum term of credit risk derivatives 3 years    
Premium financing, number of subsidiaries | subsidiary 7    
Outstanding loan receivable $ 636,000,000 616,000,000  
Write-off of amortizable intangible assets $ 66,000,000 $ 19,000,000 $ 4,000,000
Impairment, Intangible Asset, Statement of Income or Comprehensive Income [Extensible Enumeration] Amortization Amortization Amortization
Employee Stock Purchase Plan      
Significant Accounting Policies [Line Items]      
Shares authorized (in shares) | shares 8,000,000    
Percentage of employees contribution 15.00%    
Purchase price of common stock, percentage 95.00%    
Aggregate fair market value of shares purchased $ 25,000    
Maximum number of shares purchased by employees (in shares) | shares 2,000    
Shares available for grant (in shares) | shares 4,400,000    
Minimum | Expiration lists      
Significant Accounting Policies [Line Items]      
Estimated useful lives of intangibles assets, years 2 years    
Minimum | Non-compete agreements      
Significant Accounting Policies [Line Items]      
Estimated useful lives of intangibles assets, years 2 years    
Minimum | Trade names      
Significant Accounting Policies [Line Items]      
Estimated useful lives of intangibles assets, years 2 years    
Maximum | Expiration lists      
Significant Accounting Policies [Line Items]      
Estimated useful lives of intangibles assets, years 15 years    
Maximum | Non-compete agreements      
Significant Accounting Policies [Line Items]      
Estimated useful lives of intangibles assets, years 6 years    
Maximum | Trade names      
Significant Accounting Policies [Line Items]      
Estimated useful lives of intangibles assets, years 15 years    
v3.25.4
Summary of Significant Accounting Policies - Summary of Estimated Useful Life of Fixed Assets (Detail)
Dec. 31, 2025
Office equipment | Minimum  
Property, Plant and Equipment [Line Items]  
Useful Life 3 years
Office equipment | Maximum  
Property, Plant and Equipment [Line Items]  
Useful Life 10 years
Furniture and fixtures | Minimum  
Property, Plant and Equipment [Line Items]  
Useful Life 2 years
Furniture and fixtures | Maximum  
Property, Plant and Equipment [Line Items]  
Useful Life 10 years
Computer equipment | Minimum  
Property, Plant and Equipment [Line Items]  
Useful Life 3 years
Computer equipment | Maximum  
Property, Plant and Equipment [Line Items]  
Useful Life 5 years
Building | Minimum  
Property, Plant and Equipment [Line Items]  
Useful Life 15 years
Building | Maximum  
Property, Plant and Equipment [Line Items]  
Useful Life 40 years
Software | Minimum  
Property, Plant and Equipment [Line Items]  
Useful Life 3 years
Software | Maximum  
Property, Plant and Equipment [Line Items]  
Useful Life 5 years
v3.25.4
Business Combinations - Acquisition Method for Recording Business Combinations (Detail)
shares in Thousands, $ in Millions
12 Months Ended
Dec. 31, 2025
USD ($)
entity
acquisition
shares
Dec. 31, 2024
entity
Dec. 31, 2023
entity
Business Acquisition [Line Items]      
Number of companies acquired | entity 127 91 80
2025 Acquisitions      
Business Acquisition [Line Items]      
Common Shares Issued (in shares) | shares 64    
Common Shares Value $ 16    
Cash Paid 15,735    
Accrued Liability 48    
Escrow Deposited 441    
Recorded Earnout Payable 108    
Total Recorded Purchase Price 16,348    
Maximum Potential Earnout Payable $ 289    
W K Webster & Co Ltd February 1, 2025 (WKW)      
Business Acquisition [Line Items]      
Common Shares Issued (in shares) | shares 0    
Common Shares Value $ 0    
Cash Paid 139    
Accrued Liability 2    
Escrow Deposited 0    
Recorded Earnout Payable 14    
Total Recorded Purchase Price 155    
Maximum Potential Earnout Payable $ 29    
Case Group February 26, 2025 (CSG)      
Business Acquisition [Line Items]      
Common Shares Issued (in shares) | shares 0    
Common Shares Value $ 0    
Cash Paid 58    
Accrued Liability 3    
Escrow Deposited 6    
Recorded Earnout Payable 14    
Total Recorded Purchase Price 81    
Maximum Potential Earnout Payable $ 84    
Woodruff Sawyer & Co April 10, 2025 (WSC)      
Business Acquisition [Line Items]      
Common Shares Issued (in shares) | shares 0    
Common Shares Value $ 0    
Cash Paid 1,195    
Accrued Liability 12    
Escrow Deposited 67    
Recorded Earnout Payable 0    
Total Recorded Purchase Price 1,274    
Maximum Potential Earnout Payable $ 0    
Dolphin TopCo, Inc., the holding company of AssuredPartners, Inc., August 18, 2025 (APG)      
Business Acquisition [Line Items]      
Common Shares Issued (in shares) | shares 0    
Common Shares Value $ 0    
Cash Paid 13,515    
Accrued Liability 0    
Escrow Deposited 300    
Recorded Earnout Payable 0    
Total Recorded Purchase Price 13,815    
Maximum Potential Earnout Payable $ 0    
Tompkins Insurance Agencies, Inc. October 31, 2025 (TIA)      
Business Acquisition [Line Items]      
Common Shares Issued (in shares) | shares 0    
Common Shares Value $ 0    
Cash Paid 225    
Accrued Liability 8    
Escrow Deposited 0    
Recorded Earnout Payable 0    
Total Recorded Purchase Price 233    
Maximum Potential Earnout Payable $ 0    
First Actuarial, LLP November 27, 2025 (FAC)      
Business Acquisition [Line Items]      
Common Shares Issued (in shares) | shares 0    
Common Shares Value $ 0    
Cash Paid 101    
Accrued Liability 4    
Escrow Deposited 46    
Recorded Earnout Payable 7    
Total Recorded Purchase Price 158    
Maximum Potential Earnout Payable $ 26    
Twenty-seven other acquisitions completed in 2025      
Business Acquisition [Line Items]      
Common Shares Issued (in shares) | shares 64    
Common Shares Value $ 16    
Cash Paid 502    
Accrued Liability 19    
Escrow Deposited 22    
Recorded Earnout Payable 73    
Total Recorded Purchase Price 632    
Maximum Potential Earnout Payable $ 150    
Number of companies acquired | acquisition 27    
v3.25.4
Business Combinations - Additional Information (Detail)
$ in Millions
12 Months Ended
Aug. 18, 2025
USD ($)
employee
Apr. 10, 2025
USD ($)
office
employee
Jan. 07, 2025
USD ($)
Dec. 19, 2024
USD ($)
Dec. 11, 2024
USD ($)
Dec. 31, 2025
USD ($)
entity
employee
Dec. 31, 2024
USD ($)
entity
Dec. 31, 2023
USD ($)
entity
Business Acquisition [Line Items]                
Cash raised through follow-on common stock offering           $ 1,499 $ 8,507 $ 120
Number of employees will accommodate at new facility | employee           2,000    
Accretion of the discount on acquisition           $ 50 62 77
Income (expense) related to net adjustments to estimated fair value of liability for earnout obligations           $ 4 $ 36 $ (301)
Number of companies acquired | entity           127 91 80
Aggregate amount of maximum earnout obligations related to acquisitions           $ 1,518 $ 1,998  
Aggregate amount of maximum earnout obligations related to acquisitions, recorded in consolidated balance sheet           773 1,302  
Aggregate amount of earnout obligation expected settlement in cash or common stock at option           535 512  
Aggregate amount of earnout obligation expected settlement in cash           238 790  
Goodwill           9,904    
Expiration lists           7,020    
Non-compete agreements           19    
Trade names           37    
Deferred tax liability           2,742 807  
Total revenues           16,256 $ 15,024  
Expiration lists                
Business Acquisition [Line Items]                
Business acquisition not deductible for income tax purposes           6,681    
Non-compete agreements                
Business Acquisition [Line Items]                
Business acquisition not deductible for income tax purposes           11    
Trade names                
Business Acquisition [Line Items]                
Business acquisition not deductible for income tax purposes           $ 37    
Minimum                
Business Acquisition [Line Items]                
Business combination, earnout payable evaluation period           2 years    
Minimum | Expiration lists                
Business Acquisition [Line Items]                
Estimated useful lives of intangibles assets, years           2 years    
Minimum | Non-compete agreements                
Business Acquisition [Line Items]                
Estimated useful lives of intangibles assets, years           2 years    
Minimum | Trade names                
Business Acquisition [Line Items]                
Estimated useful lives of intangibles assets, years           2 years    
Maximum                
Business Acquisition [Line Items]                
Business combination, earnout payable evaluation period           3 years    
Maximum | Expiration lists                
Business Acquisition [Line Items]                
Estimated useful lives of intangibles assets, years           15 years    
Maximum | Non-compete agreements                
Business Acquisition [Line Items]                
Estimated useful lives of intangibles assets, years           6 years    
Maximum | Trade names                
Business Acquisition [Line Items]                
Estimated useful lives of intangibles assets, years           15 years    
Business Acquisition                
Business Acquisition [Line Items]                
Annualized revenue of business acquisitions           $ 3,562    
Total revenues           1,369    
Net earnings           25    
Net earnings before interest, income taxes, depreciation, amortization and change in estimated acquisition earnout payables           296    
2025 Acquisitions                
Business Acquisition [Line Items]                
Expiration lists           7,020    
Non-compete agreements           19    
Trade names           37    
Deferred tax liability           $ 720    
2025 Acquisitions | Valuation, Market Approach | Measurement Input, Discount Rate | Minimum                
Business Acquisition [Line Items]                
Measurement input           0.05    
2025 Acquisitions | Valuation, Market Approach | Measurement Input, Discount Rate | Maximum                
Business Acquisition [Line Items]                
Measurement input           0.18    
2025 Acquisitions | Valuation, Market Approach | Measurement Input, Long-term Revenue Growth Rate | Minimum                
Business Acquisition [Line Items]                
Measurement input           0.03    
2025 Acquisitions | Valuation, Market Approach | Measurement Input, Long-term Revenue Growth Rate | Maximum                
Business Acquisition [Line Items]                
Measurement input           0.04    
2025 Acquisitions | Valuation, Income Approach | Minimum                
Business Acquisition [Line Items]                
Attrition rate           5.00%    
2025 Acquisitions | Valuation, Income Approach | Maximum                
Business Acquisition [Line Items]                
Attrition rate           12.00%    
2025 Acquisitions | Valuation, Income Approach | Measurement Input, Discount Rate | Minimum                
Business Acquisition [Line Items]                
Measurement input           0.08    
2025 Acquisitions | Valuation, Income Approach | Measurement Input, Discount Rate | Maximum                
Business Acquisition [Line Items]                
Measurement input           0.09    
2025 Acquisitions | Valuation, Income Approach | Measurement Input, Long-term Revenue Growth Rate | Minimum                
Business Acquisition [Line Items]                
Measurement input           0.10    
2025 Acquisitions | Valuation, Income Approach | Measurement Input, Long-term Revenue Growth Rate | Maximum                
Business Acquisition [Line Items]                
Measurement input           0.14    
2024 Acquisitions | Valuation, Market Approach | Measurement Input, Long-term Revenue Growth Rate | Minimum                
Business Acquisition [Line Items]                
Measurement input           0.03    
2024 Acquisitions | Valuation, Market Approach | Measurement Input, Long-term Revenue Growth Rate | Maximum                
Business Acquisition [Line Items]                
Measurement input           0.04    
2024 Acquisitions | Valuation, Income Approach | Minimum                
Business Acquisition [Line Items]                
Attrition rate           5.00%    
2024 Acquisitions | Valuation, Income Approach | Maximum                
Business Acquisition [Line Items]                
Attrition rate           12.00%    
2024 Acquisitions | Valuation, Income Approach | Measurement Input, Long-term Revenue Growth Rate | Minimum                
Business Acquisition [Line Items]                
Measurement input           0.10    
2024 Acquisitions | Valuation, Income Approach | Measurement Input, Long-term Revenue Growth Rate | Maximum                
Business Acquisition [Line Items]                
Measurement input           0.14    
AssuredPartners, Inc                
Business Acquisition [Line Items]                
Gross consideration $ 13,800              
Cash raised through follow-on common stock offering         $ 8,500      
Number of employees will accommodate at new facility | employee 10,900              
Woodruff Sawyer & Co April 10, 2025 (WSC)                
Business Acquisition [Line Items]                
Gross consideration   $ 1,200            
Number of employees will accommodate at new facility | employee   600            
Goodwill           $ 823    
Expiration lists           459    
Non-compete agreements           0    
Trade names           $ 8    
Woodruff Sawyer & Co April 10, 2025 (WSC) | United States                
Business Acquisition [Line Items]                
Number of offices | office   14            
Woodruff Sawyer & Co April 10, 2025 (WSC) | United Kingdom                
Business Acquisition [Line Items]                
Number of offices | office   1            
Over-Allotment Option | AssuredPartners, Inc                
Business Acquisition [Line Items]                
Cash raised through follow-on common stock offering     $ 1,300          
Senior Notes | AssuredPartners, Inc                
Business Acquisition [Line Items]                
Cash borrowed from senior notes       $ 5,000        
v3.25.4
Business Combinations - Summary of Estimated Fair Values of Net Assets Acquired (Detail)
$ in Millions
12 Months Ended
Dec. 31, 2025
USD ($)
entity
acquisition
Dec. 31, 2024
entity
Dec. 31, 2023
entity
Business Acquisition Actual Revenue And Pre Tax Income Loss [Line Items]      
Cash and cash equivalents $ 400    
Fiduciary assets 1,646    
Other current assets 1,088    
Fixed assets 154    
Noncurrent assets 268    
Goodwill 9,904    
Expiration lists 7,020    
Non-compete agreements 19    
Trade names 37    
Total assets acquired 20,536    
Fiduciary liabilities 1,646    
Current liabilities 1,027    
Noncurrent liabilities 1,515    
Total liabilities assumed 4,188    
Total net assets acquired $ 16,348    
Number of companies acquired | entity 127 91 80
W K Webster & Co Ltd February 1, 2025 (WKW)      
Business Acquisition Actual Revenue And Pre Tax Income Loss [Line Items]      
Cash and cash equivalents $ 5    
Fiduciary assets 87    
Other current assets 17    
Fixed assets 3    
Noncurrent assets 2    
Goodwill 100    
Expiration lists 54    
Non-compete agreements 0    
Trade names 2    
Total assets acquired 270    
Fiduciary liabilities 87    
Current liabilities 12    
Noncurrent liabilities 16    
Total liabilities assumed 115    
Total net assets acquired 155    
Case Group February 26, 2025 (CSG)      
Business Acquisition Actual Revenue And Pre Tax Income Loss [Line Items]      
Cash and cash equivalents 6    
Fiduciary assets 0    
Other current assets 4    
Fixed assets 1    
Noncurrent assets 0    
Goodwill 59    
Expiration lists 25    
Non-compete agreements 1    
Trade names 0    
Total assets acquired 96    
Fiduciary liabilities 0    
Current liabilities 7    
Noncurrent liabilities 8    
Total liabilities assumed 15    
Total net assets acquired 81    
Woodruff Sawyer & Co April 10, 2025 (WSC)      
Business Acquisition Actual Revenue And Pre Tax Income Loss [Line Items]      
Cash and cash equivalents 62    
Fiduciary assets 465    
Other current assets 79    
Fixed assets 13    
Noncurrent assets 25    
Goodwill 823    
Expiration lists 459    
Non-compete agreements 0    
Trade names 8    
Total assets acquired 1,934    
Fiduciary liabilities 465    
Current liabilities 41    
Noncurrent liabilities 154    
Total liabilities assumed 660    
Total net assets acquired 1,274    
Dolphin TopCo, Inc., the holding company of AssuredPartners, Inc., August 18, 2025 (APG)      
Business Acquisition Actual Revenue And Pre Tax Income Loss [Line Items]      
Cash and cash equivalents 276    
Fiduciary assets 1,032    
Other current assets 938    
Fixed assets 134    
Noncurrent assets 237    
Goodwill 8,376    
Expiration lists 5,993    
Non-compete agreements 0    
Trade names 27    
Total assets acquired 17,013    
Fiduciary liabilities 1,032    
Current liabilities 933    
Noncurrent liabilities 1,233    
Total liabilities assumed 3,198    
Total net assets acquired 13,815    
Tompkins Insurance Agencies, Inc. October 31, 2025 (TIA)      
Business Acquisition Actual Revenue And Pre Tax Income Loss [Line Items]      
Cash and cash equivalents 13    
Fiduciary assets 7    
Other current assets 7    
Fixed assets 2    
Noncurrent assets 0    
Goodwill 82    
Expiration lists 135    
Non-compete agreements 0    
Trade names 0    
Total assets acquired 246    
Fiduciary liabilities 7    
Current liabilities 6    
Noncurrent liabilities 0    
Total liabilities assumed 13    
Total net assets acquired 233    
First Actuarial, LLP November 27, 2025 (FAC)      
Business Acquisition Actual Revenue And Pre Tax Income Loss [Line Items]      
Cash and cash equivalents 8    
Fiduciary assets 0    
Other current assets 23    
Fixed assets 0    
Noncurrent assets 2    
Goodwill 97    
Expiration lists 47    
Non-compete agreements 8    
Trade names 0    
Total assets acquired 185    
Fiduciary liabilities 0    
Current liabilities 10    
Noncurrent liabilities 17    
Total liabilities assumed 27    
Total net assets acquired 158    
Twenty-seven other acquisitions completed in 2025      
Business Acquisition Actual Revenue And Pre Tax Income Loss [Line Items]      
Cash and cash equivalents 30    
Fiduciary assets 55    
Other current assets 20    
Fixed assets 1    
Noncurrent assets 2    
Goodwill 367    
Expiration lists 307    
Non-compete agreements 10    
Trade names 0    
Total assets acquired 792    
Fiduciary liabilities 55    
Current liabilities 18    
Noncurrent liabilities 87    
Total liabilities assumed 160    
Total net assets acquired $ 632    
Number of companies acquired | acquisition 27    
v3.25.4
Business Combinations - Summary of Unaudited Pro Forma Historical Results (Detail) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Business Combinations [Abstract]    
Total revenues $ 16,256 $ 15,024
Net earnings attributable to controlling interests $ 1,623 $ 1,474
Basic net earnings per share $ 6.34 $ 5.81
Diluted net earnings per share $ 6.24 $ 5.71
v3.25.4
Contracts with Customers - Summary of Unbilled Receivables, Contract Assets and Contract Liabilities from Contracts with Customers (Detail) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Revenue from Contract with Customer [Abstract]      
Unbilled receivables $ 1,858 $ 1,274  
Deferred contract costs 338 207  
Deferred revenue $ 892 $ 604 $ 705
v3.25.4
Contracts with Customers - Summary of Changes in Deferred Revenue Balances (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Change in Contract with Customer, Liability [Roll Forward]    
Deferred revenue beginning balance $ 604 $ 705
Incremental deferred revenue 408 396
Revenue recognized (423) (476)
Net change in collected billings/deposits received from customers (2) (44)
Impact of changes in foreign exchange rates (21) 0
Deferred revenue recognized from business acquisitions 326 23
Deferred revenue ending balance 892 604
Brokerage    
Change in Contract with Customer, Liability [Roll Forward]    
Deferred revenue beginning balance 431 533
Incremental deferred revenue 296 305
Revenue recognized (335) (390)
Net change in collected billings/deposits received from customers (4) (40)
Impact of changes in foreign exchange rates (21) 0
Deferred revenue recognized from business acquisitions 326 23
Deferred revenue ending balance 693 431
Risk Management    
Change in Contract with Customer, Liability [Roll Forward]    
Deferred revenue beginning balance 173 172
Incremental deferred revenue 112 91
Revenue recognized (88) (86)
Net change in collected billings/deposits received from customers 2 (4)
Impact of changes in foreign exchange rates 0 0
Deferred revenue recognized from business acquisitions 0 0
Deferred revenue ending balance $ 199 $ 173
v3.25.4
Contracts with Customers - Additional Information (Detail) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Revenue from Contract with Customer [Abstract]    
Remaining performance obligations $ 892  
Deferred contract costs 338 $ 207
Amortization of deferred contract costs $ 909 $ 666
v3.25.4
Contracts with Customers - Summary of Expected Revenue Related to Performance Obligations (Detail)
$ in Millions
Dec. 31, 2025
USD ($)
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]  
Expected revenue related to performance obligations $ 892
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2026-01-01  
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]  
Expected revenue related to performance obligations $ 715
Remaining performance obligation, expected timing of satisfaction, period 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2027-01-01  
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]  
Expected revenue related to performance obligations $ 99
Remaining performance obligation, expected timing of satisfaction, period 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2028-01-01  
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]  
Expected revenue related to performance obligations $ 36
Remaining performance obligation, expected timing of satisfaction, period 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2029-01-01  
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]  
Expected revenue related to performance obligations $ 18
Remaining performance obligation, expected timing of satisfaction, period 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2030-01-01  
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]  
Expected revenue related to performance obligations $ 8
Remaining performance obligation, expected timing of satisfaction, period 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2031-01-01  
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]  
Expected revenue related to performance obligations $ 16
Remaining performance obligation, expected timing of satisfaction, period
Brokerage  
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]  
Expected revenue related to performance obligations $ 693
Brokerage | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2026-01-01  
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]  
Expected revenue related to performance obligations $ 668
Remaining performance obligation, expected timing of satisfaction, period 1 year
Brokerage | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2027-01-01  
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]  
Expected revenue related to performance obligations $ 22
Remaining performance obligation, expected timing of satisfaction, period 1 year
Brokerage | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2028-01-01  
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]  
Expected revenue related to performance obligations $ 1
Remaining performance obligation, expected timing of satisfaction, period 1 year
Brokerage | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2029-01-01  
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]  
Expected revenue related to performance obligations $ 1
Remaining performance obligation, expected timing of satisfaction, period 1 year
Brokerage | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2030-01-01  
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]  
Expected revenue related to performance obligations $ 0
Remaining performance obligation, expected timing of satisfaction, period 1 year
Brokerage | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2031-01-01  
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]  
Expected revenue related to performance obligations $ 1
Remaining performance obligation, expected timing of satisfaction, period
Risk Management  
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]  
Expected revenue related to performance obligations $ 199
Risk Management | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2026-01-01  
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]  
Expected revenue related to performance obligations $ 47
Remaining performance obligation, expected timing of satisfaction, period 1 year
Risk Management | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2027-01-01  
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]  
Expected revenue related to performance obligations $ 77
Remaining performance obligation, expected timing of satisfaction, period 1 year
Risk Management | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2028-01-01  
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]  
Expected revenue related to performance obligations $ 35
Remaining performance obligation, expected timing of satisfaction, period 1 year
Risk Management | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2029-01-01  
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]  
Expected revenue related to performance obligations $ 17
Remaining performance obligation, expected timing of satisfaction, period 1 year
Risk Management | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2030-01-01  
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]  
Expected revenue related to performance obligations $ 8
Remaining performance obligation, expected timing of satisfaction, period 1 year
Risk Management | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2031-01-01  
Revenue Remaining Performance Obligation Expected Timing Of Satisfaction [Line Items]  
Expected revenue related to performance obligations $ 15
Remaining performance obligation, expected timing of satisfaction, period
v3.25.4
Fixed Assets - Summary of Fixed Assets (Detail) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross $ 2,271 $ 1,806
Accumulated depreciation (1,482) (1,156)
Net fixed assets 789 650
Office equipment    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross 53 34
Furniture and fixtures    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross 215 152
Leasehold improvements    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross 326 260
Computer equipment    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross 439 362
Land and buildings - corporate headquarters    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross 174 172
Software    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross 942 721
Other    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross 42 41
Work in process    
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross $ 80 $ 64
v3.25.4
Intangible Assets - Carrying Amount of Goodwill Allocated by Domestic and Foreign Operations (Detail) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Goodwill [Line Items]      
Total goodwill - net $ 22,593 $ 12,270 $ 11,476
United States      
Goodwill [Line Items]      
Total goodwill - net 16,537 7,041  
United Kingdom      
Goodwill [Line Items]      
Total goodwill - net 3,031 2,617  
Canada      
Goodwill [Line Items]      
Total goodwill - net 628 587  
Australia      
Goodwill [Line Items]      
Total goodwill - net 829 728  
New Zealand      
Goodwill [Line Items]      
Total goodwill - net 233 191  
Other foreign      
Goodwill [Line Items]      
Total goodwill - net 1,335 1,106  
Brokerage      
Goodwill [Line Items]      
Total goodwill - net 22,078 11,923 11,218
Risk Management      
Goodwill [Line Items]      
Total goodwill - net 497 328 239
Corporate      
Goodwill [Line Items]      
Total goodwill - net 18 19 19
Operating Segments | Brokerage      
Goodwill [Line Items]      
Total goodwill - net 22,078 11,923 11,218
Operating Segments | Brokerage | United States      
Goodwill [Line Items]      
Total goodwill - net 16,428 6,966  
Operating Segments | Brokerage | United Kingdom      
Goodwill [Line Items]      
Total goodwill - net 2,889 2,591  
Operating Segments | Brokerage | Canada      
Goodwill [Line Items]      
Total goodwill - net 628 587  
Operating Segments | Brokerage | Australia      
Goodwill [Line Items]      
Total goodwill - net 591 509  
Operating Segments | Brokerage | New Zealand      
Goodwill [Line Items]      
Total goodwill - net 225 183  
Operating Segments | Brokerage | Other foreign      
Goodwill [Line Items]      
Total goodwill - net 1,317 1,087  
Operating Segments | Risk Management      
Goodwill [Line Items]      
Total goodwill - net 497 328 239
Operating Segments | Risk Management | United States      
Goodwill [Line Items]      
Total goodwill - net 109 75  
Operating Segments | Risk Management | United Kingdom      
Goodwill [Line Items]      
Total goodwill - net 142 26  
Operating Segments | Risk Management | Canada      
Goodwill [Line Items]      
Total goodwill - net 0 0  
Operating Segments | Risk Management | Australia      
Goodwill [Line Items]      
Total goodwill - net 238 219  
Operating Segments | Risk Management | New Zealand      
Goodwill [Line Items]      
Total goodwill - net 8 8  
Operating Segments | Risk Management | Other foreign      
Goodwill [Line Items]      
Total goodwill - net 0 0  
Operating Segments | Corporate      
Goodwill [Line Items]      
Total goodwill - net 18 19 $ 19
Operating Segments | Corporate | United States      
Goodwill [Line Items]      
Total goodwill - net 0 0  
Operating Segments | Corporate | United Kingdom      
Goodwill [Line Items]      
Total goodwill - net 0 0  
Operating Segments | Corporate | Canada      
Goodwill [Line Items]      
Total goodwill - net 0 0  
Operating Segments | Corporate | Australia      
Goodwill [Line Items]      
Total goodwill - net 0 0  
Operating Segments | Corporate | New Zealand      
Goodwill [Line Items]      
Total goodwill - net 0 0  
Operating Segments | Corporate | Other foreign      
Goodwill [Line Items]      
Total goodwill - net $ 18 $ 19  
v3.25.4
Intangible Assets - Changes in Carrying Amount of Goodwill (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Goodwill [Roll Forward]    
Beginning Balance $ 12,270 $ 11,476
Goodwill acquired during the year 9,904 837
Goodwill adjustments related to appraisals and other acquisition adjustments 41 199
Goodwill written-off related to sales of business (20) (6)
Foreign currency translation adjustments during the year 398 (236)
Ending Balance 22,593 12,270
Brokerage    
Goodwill [Roll Forward]    
Beginning Balance 11,923 11,218
Goodwill acquired during the year 9,770 830
Goodwill adjustments related to appraisals and other acquisition adjustments 32 98
Goodwill written-off related to sales of business (20) (6)
Foreign currency translation adjustments during the year 373 (217)
Ending Balance 22,078 11,923
Risk Management    
Goodwill [Roll Forward]    
Beginning Balance 328 239
Goodwill acquired during the year 134 7
Goodwill adjustments related to appraisals and other acquisition adjustments 9 101
Goodwill written-off related to sales of business 0 0
Foreign currency translation adjustments during the year 26 (19)
Ending Balance 497 328
Corporate    
Goodwill [Roll Forward]    
Beginning Balance 19 19
Goodwill acquired during the year 0 0
Goodwill adjustments related to appraisals and other acquisition adjustments 0 0
Goodwill written-off related to sales of business 0 0
Foreign currency translation adjustments during the year (1) 0
Ending Balance $ 18 $ 19
v3.25.4
Intangible Assets - Major Classes of Amortizable Intangible Assets (Detail) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Finite-Lived Intangible Assets [Line Items]    
Net amortizable assets $ 10,684 $ 4,530
Expiration lists    
Finite-Lived Intangible Assets [Line Items]    
Amortizable intangible assets, gross 15,968 8,764
Accumulated amortization (5,357) (4,313)
Net amortizable assets 10,611 4,451
Non-compete agreements    
Finite-Lived Intangible Assets [Line Items]    
Amortizable intangible assets, gross 125 118
Accumulated amortization (98) (86)
Net amortizable assets 27 32
Trade names    
Finite-Lived Intangible Assets [Line Items]    
Amortizable intangible assets, gross 160 120
Accumulated amortization (114) (73)
Net amortizable assets $ 46 $ 47
v3.25.4
Intangible Assets - Estimated Aggregate Amortization Expense (Detail) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract]    
2026 $ 1,105  
2027 1,071  
2028 1,028  
2029 973  
2030 917  
Thereafter 5,590  
Net amortizable assets $ 10,684 $ 4,530
v3.25.4
Credit and Other Debt Agreements - Summary of Corporate and Other Debt (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 19, 2024
Feb. 12, 2024
Debt Instrument [Line Items]        
Total corporate and other debt $ 13,099 $ 13,298    
Less unamortized debt acquisition costs on Senior Notes and Note Purchase Agreements (81) (90)    
Less unamortized discount on Bonds Payable (48) (51)    
Net corporate and other debt 12,970 13,157    
Periodic payments of interest and principal, expires April 30, 2030        
Debt Instrument [Line Items]        
Total corporate and other debt 0 0    
Note purchase agreements        
Debt Instrument [Line Items]        
Total corporate and other debt $ 3,323 3,523    
Debt instrument, basis spread on variable rate 0.50%      
Senior Notes:        
Debt Instrument [Line Items]        
Total corporate and other debt $ 9,550 9,550    
Semi-annual payments of interest, fixed rate of 4.60%, balloon due December 15, 2027 | Senior Notes:        
Debt Instrument [Line Items]        
Total corporate and other debt $ 750 $ 750    
Periodic payment of interest 4.60% 4.60% 4.60%  
Semi-annual payments of interest, fixed rate of 4.85%, balloon due December 15, 2029 | Senior Notes:        
Debt Instrument [Line Items]        
Total corporate and other debt $ 750 $ 750    
Periodic payment of interest 4.85% 4.85% 4.85%  
Semi-annual payments of interest, fixed rate of 2.40%, balloon due November 9, 2031 | Senior Notes:        
Debt Instrument [Line Items]        
Total corporate and other debt $ 400 $ 400    
Periodic payment of interest 2.40% 2.40%    
Semi-annual payments of interest, fixed rate of 5.00%, balloon due February 15, 2032 | Senior Notes:        
Debt Instrument [Line Items]        
Total corporate and other debt $ 500 $ 500    
Periodic payment of interest 5.00% 5.00% 5.00%  
Semi-annual payments of interest, fixed rate of 5.50%, balloon due March 2, 2033 | Senior Notes:        
Debt Instrument [Line Items]        
Total corporate and other debt $ 350 $ 350    
Periodic payment of interest 5.50% 5.50%    
Semi-annual payments of interest, fixed rate of 6.50%, balloon due February 15, 2034 | Senior Notes:        
Debt Instrument [Line Items]        
Total corporate and other debt $ 400 $ 400    
Periodic payment of interest 6.50% 6.50%    
Semi-annual payments of interest, fixed rate of 5.45%, balloon due July 15, 2034 | Senior Notes:        
Debt Instrument [Line Items]        
Total corporate and other debt $ 500 $ 500    
Periodic payment of interest 5.45% 5.45%   5.45%
Semi-annual payments of interest, fixed rate of 5.15%, balloon due February 15, 2035 | Senior Notes:        
Debt Instrument [Line Items]        
Total corporate and other debt $ 1,500 $ 1,500    
Periodic payment of interest 5.15% 5.15% 5.15%  
Semi-annual payments of interest, fixed rate of 3.50%, balloon due May 20, 2051 | Senior Notes:        
Debt Instrument [Line Items]        
Total corporate and other debt $ 850 $ 850    
Periodic payment of interest 3.50% 3.50%    
Semi-annual payments of interest, fixed rate of 3.05%, balloon due March 9, 2052 | Senior Notes:        
Debt Instrument [Line Items]        
Total corporate and other debt $ 350 $ 350    
Periodic payment of interest 3.05% 3.05%    
Semi-annual payments of interest, fixed rate of 5.75%, balloon due March 2, 2053 | Senior Notes:        
Debt Instrument [Line Items]        
Total corporate and other debt $ 600 $ 600    
Periodic payment of interest 5.75% 5.75%    
Semi-annual payments of interest, fixed rate of 6.75%, balloon due February 15, 2054 | Senior Notes:        
Debt Instrument [Line Items]        
Total corporate and other debt $ 600 $ 600    
Periodic payment of interest 6.75% 6.75%    
Semi-annual payments of interest, fixed rate of 5.75%, balloon due July 15, 2054 | Senior Notes:        
Debt Instrument [Line Items]        
Total corporate and other debt $ 500 $ 500    
Periodic payment of interest 5.75% 5.75%   5.75%
Semi-annual payments of interest, fixed rate of 5.55%, balloon due February 15, 2055 | Senior Notes:        
Debt Instrument [Line Items]        
Total corporate and other debt $ 1,500 $ 1,500    
Periodic payment of interest 5.55% 5.55% 5.55%  
Semi-annual payments of interest, fixed rate of 4.31%, balloon due June 24, 2025 | Note purchase agreements        
Debt Instrument [Line Items]        
Total corporate and other debt $ 0 $ 200    
Periodic payment of interest 4.31% 4.31%    
Semi-annual payments of interest, fixed rate of 4.85%, balloon due February 13, 2026 | Note purchase agreements        
Debt Instrument [Line Items]        
Total corporate and other debt $ 140 $ 140    
Periodic payment of interest 4.85% 4.85%    
Semi-annual payments of interest, fixed rate of 4.73%, balloon due February 27, 2026 | Note purchase agreements        
Debt Instrument [Line Items]        
Total corporate and other debt $ 175 $ 175    
Periodic payment of interest 4.73% 4.73%    
Semi-annual payments of interest, fixed rate of 4.40%, balloon due June 2, 2026 | Note purchase agreements        
Debt Instrument [Line Items]        
Total corporate and other debt $ 175 $ 175    
Periodic payment of interest 4.40% 4.40%    
Semi-annual payments of interest, fixed rate of 4.36%, balloon due June 24, 2026 | Note purchase agreements        
Debt Instrument [Line Items]        
Total corporate and other debt $ 150 $ 150    
Periodic payment of interest 4.36% 4.36%    
Semi-annual payments of interest, fixed rate of 3.75%, balloon due January 30, 2027        
Debt Instrument [Line Items]        
Periodic payment of interest 3.75% 3.75%    
Semi-annual payments of interest, fixed rate of 3.75%, balloon due January 30, 2027 | Note purchase agreements        
Debt Instrument [Line Items]        
Total corporate and other debt $ 30 $ 30    
Semi-annual payments of interest, fixed rate of 4.09%, balloon due June 27, 2027        
Debt Instrument [Line Items]        
Periodic payment of interest 4.09% 4.09%    
Semi-annual payments of interest, fixed rate of 4.09%, balloon due June 27, 2027 | Note purchase agreements        
Debt Instrument [Line Items]        
Total corporate and other debt $ 125 $ 125    
Semi-annual payments of interest, fixed rate of 4.09%, balloon due August 2, 2027        
Debt Instrument [Line Items]        
Periodic payment of interest 4.09% 4.09%    
Semi-annual payments of interest, fixed rate of 4.09%, balloon due August 2, 2027 | Note purchase agreements        
Debt Instrument [Line Items]        
Total corporate and other debt $ 125 $ 125    
Semi-annual payments of interest, fixed rate of 4.14%, balloon due August 4, 2027        
Debt Instrument [Line Items]        
Periodic payment of interest 4.14% 4.14%    
Semi-annual payments of interest, fixed rate of 4.14%, balloon due August 4, 2027 | Note purchase agreements        
Debt Instrument [Line Items]        
Total corporate and other debt $ 98 $ 98    
Semi-annual payments of interest, fixed rate of 3.46%, balloon due December 1, 2027        
Debt Instrument [Line Items]        
Periodic payment of interest 3.46% 3.46%    
Semi-annual payments of interest, fixed rate of 3.46%, balloon due December 1, 2027 | Note purchase agreements        
Debt Instrument [Line Items]        
Total corporate and other debt $ 100 $ 100    
Semi-annual payments of interest, fixed rate of 4.55%, balloon due June 2, 2028        
Debt Instrument [Line Items]        
Periodic payment of interest 4.55% 4.55%    
Semi-annual payments of interest, fixed rate of 4.55%, balloon due June 2, 2028 | Note purchase agreements        
Debt Instrument [Line Items]        
Total corporate and other debt $ 75 $ 75    
Semi-annual payments of interest, fixed rate of 4.34%, balloon due June 13, 2028        
Debt Instrument [Line Items]        
Periodic payment of interest 4.34% 4.34%    
Semi-annual payments of interest, fixed rate of 4.34%, balloon due June 13, 2028 | Note purchase agreements        
Debt Instrument [Line Items]        
Total corporate and other debt $ 125 $ 125    
Semi-annual payments of interest, fixed rate of 5.04%, balloon due February 13, 2029        
Debt Instrument [Line Items]        
Periodic payment of interest 5.04% 5.04%    
Semi-annual payments of interest, fixed rate of 5.04%, balloon due February 13, 2029 | Note purchase agreements        
Debt Instrument [Line Items]        
Total corporate and other debt $ 100 $ 100    
Semi-annual payments of interest, fixed rate of 4.98%, balloon due February 27, 2029        
Debt Instrument [Line Items]        
Periodic payment of interest 4.98% 4.98%    
Semi-annual payments of interest, fixed rate of 4.98%, balloon due February 27, 2029 | Note purchase agreements        
Debt Instrument [Line Items]        
Total corporate and other debt $ 100 $ 100    
Semi-annual payments of interest, fixed rate of 4.19%, balloon due June 27, 2029        
Debt Instrument [Line Items]        
Periodic payment of interest 4.19% 4.19%    
Semi-annual payments of interest, fixed rate of 4.19%, balloon due June 27, 2029 | Note purchase agreements        
Debt Instrument [Line Items]        
Total corporate and other debt $ 50 $ 50    
Semi-annual payments of interest, fixed rate of 4.19%, balloon due August 2, 2029        
Debt Instrument [Line Items]        
Periodic payment of interest 4.19% 4.19%    
Semi-annual payments of interest, fixed rate of 4.19%, balloon due August 2, 2029 | Note purchase agreements        
Debt Instrument [Line Items]        
Total corporate and other debt $ 50 $ 50    
Semi-annual payments of interest, fixed rate of 3.48%, balloon due December 2, 2029        
Debt Instrument [Line Items]        
Periodic payment of interest 3.48% 3.48%    
Semi-annual payments of interest, fixed rate of 3.48%, balloon due December 2, 2029 | Note purchase agreements        
Debt Instrument [Line Items]        
Total corporate and other debt $ 50 $ 50    
Semi-annual payments of interest, fixed rate of 3.99%, balloon due January 30, 2030        
Debt Instrument [Line Items]        
Periodic payment of interest 3.99% 3.99%    
Semi-annual payments of interest, fixed rate of 3.99%, balloon due January 30, 2030 | Note purchase agreements        
Debt Instrument [Line Items]        
Total corporate and other debt $ 341 $ 341    
Semi-annual payments of interest, fixed rate of 4.44%, balloon due June 13, 2030        
Debt Instrument [Line Items]        
Periodic payment of interest 4.44% 4.44%    
Semi-annual payments of interest, fixed rate of 4.44%, balloon due June 13, 2030 | Note purchase agreements        
Debt Instrument [Line Items]        
Total corporate and other debt $ 125 $ 125    
Semi-annual payments of interest, fixed rate of 5.14%, balloon due March 13, 2031        
Debt Instrument [Line Items]        
Periodic payment of interest 5.14% 5.14%    
Semi-annual payments of interest, fixed rate of 5.14%, balloon due March 13, 2031 | Note purchase agreements        
Debt Instrument [Line Items]        
Total corporate and other debt $ 180 $ 180    
Semi-annual payments of interest, fixed rate of 4.70%, balloon due June 2, 2031        
Debt Instrument [Line Items]        
Periodic payment of interest 4.70% 4.70%    
Semi-annual payments of interest, fixed rate of 4.70%, balloon due June 2, 2031 | Note purchase agreements        
Debt Instrument [Line Items]        
Total corporate and other debt $ 25 $ 25    
Semi-annual payments of interest, fixed rate of 4.09%, balloon due January 30, 2032        
Debt Instrument [Line Items]        
Periodic payment of interest 4.09% 4.09%    
Semi-annual payments of interest, fixed rate of 4.09%, balloon due January 30, 2032 | Note purchase agreements        
Debt Instrument [Line Items]        
Total corporate and other debt $ 69 $ 69    
Semi-annual payments of interest, fixed rate of 4.34%, balloon due June 27, 2032        
Debt Instrument [Line Items]        
Periodic payment of interest 4.34% 4.34%    
Semi-annual payments of interest, fixed rate of 4.34%, balloon due June 27, 2032 | Note purchase agreements        
Debt Instrument [Line Items]        
Total corporate and other debt $ 75 $ 75    
Semi-annual payments of interest, fixed rate of 4.34%, balloon due August 2, 2032        
Debt Instrument [Line Items]        
Periodic payment of interest 4.34% 4.34%    
Semi-annual payments of interest, fixed rate of 4.34%, balloon due August 2, 2032 | Note purchase agreements        
Debt Instrument [Line Items]        
Total corporate and other debt $ 75 $ 75    
Semi-annual payments of interest, fixed rate of 4.59%, balloon due June 13, 2033        
Debt Instrument [Line Items]        
Periodic payment of interest 4.59% 4.59%    
Semi-annual payments of interest, fixed rate of 4.59%, balloon due June 13, 2033 | Note purchase agreements        
Debt Instrument [Line Items]        
Total corporate and other debt $ 125 $ 125    
Semi-annual payments of interest, fixed rate of 5.29%, balloon due March 13, 2034        
Debt Instrument [Line Items]        
Periodic payment of interest 5.29% 5.29%    
Semi-annual payments of interest, fixed rate of 5.29%, balloon due March 13, 2034 | Note purchase agreements        
Debt Instrument [Line Items]        
Total corporate and other debt $ 40 $ 40    
Semi-annual payments of interest, fixed rate of 4.48%, balloon due June 12, 2034        
Debt Instrument [Line Items]        
Periodic payment of interest 4.48% 4.48%    
Semi-annual payments of interest, fixed rate of 4.48%, balloon due June 12, 2034 | Note purchase agreements        
Debt Instrument [Line Items]        
Total corporate and other debt $ 175 $ 175    
Semi-annual payments of interest, fixed rate of 4.24%, balloon due January 30, 2035        
Debt Instrument [Line Items]        
Periodic payment of interest 4.24% 4.24%    
Semi-annual payments of interest, fixed rate of 4.24%, balloon due January 30, 2035 | Note purchase agreements        
Debt Instrument [Line Items]        
Total corporate and other debt $ 79 $ 79    
Semi-annual payments of interest, fixed rate of 2.44%, balloon due February 10, 2036        
Debt Instrument [Line Items]        
Periodic payment of interest 2.44% 2.44%    
Semi-annual payments of interest, fixed rate of 2.44%, balloon due February 10, 2036 | Note purchase agreements        
Debt Instrument [Line Items]        
Total corporate and other debt $ 100 $ 100    
Semi-annual payments of interest, fixed rate of 2.46%, balloon due May 5, 2036        
Debt Instrument [Line Items]        
Periodic payment of interest 2.46% 2.46%    
Semi-annual payments of interest, fixed rate of 2.46%, balloon due May 5, 2036 | Note purchase agreements        
Debt Instrument [Line Items]        
Total corporate and other debt $ 75 $ 75    
Semi-annual payments of interest, fixed rate of 4.69%, balloon due June 13, 2038        
Debt Instrument [Line Items]        
Periodic payment of interest 4.69% 4.69%    
Semi-annual payments of interest, fixed rate of 4.69%, balloon due June 13, 2038 | Note purchase agreements        
Debt Instrument [Line Items]        
Total corporate and other debt $ 75 $ 75    
Semi-annual payments of interest, fixed rate of 5.45%, balloon due March 13, 2039        
Debt Instrument [Line Items]        
Periodic payment of interest 5.45% 5.45%    
Semi-annual payments of interest, fixed rate of 5.45%, balloon due March 13, 2039 | Note purchase agreements        
Debt Instrument [Line Items]        
Total corporate and other debt $ 40 $ 40    
Semi-annual payments of interest, fixed rate of 4.49%, balloon due January 30, 2040        
Debt Instrument [Line Items]        
Periodic payment of interest 4.49% 4.49%    
Semi-annual payments of interest, fixed rate of 4.49%, balloon due January 30, 2040 | Note purchase agreements        
Debt Instrument [Line Items]        
Total corporate and other debt $ 56 $ 56    
Premium Financing Debt Facility - expires October 31, 2027: | Premium Financing Debt Facility        
Debt Instrument [Line Items]        
Total corporate and other debt 226 225    
AUD denominated tranche, interbank rates plus 1.300% | A U D Denominated Tranche | Premium Financing Debt Facility | Facility B        
Debt Instrument [Line Items]        
Total corporate and other debt $ 217 $ 218    
Debt instrument, basis spread on variable rate 1.30% 1.30%    
NZD denominated tranche, interbank rates plus 1.850% | NZD Denominated Tranche | Premium Financing Debt Facility | Facility B        
Debt Instrument [Line Items]        
Total corporate and other debt $ 0 $ 0    
Debt instrument, basis spread on variable rate 1.85% 1.85%    
AUD denominated tranche, interbank rates plus 0.780% | A U D Denominated Tranche | Premium Financing Debt Facility | Facility C and D        
Debt Instrument [Line Items]        
Total corporate and other debt $ 0 $ 0    
Debt instrument, basis spread on variable rate 0.78% 0.78%    
NZD denominated tranche, interbank rates plus 0.990% | NZD Denominated Tranche | Premium Financing Debt Facility | Facility C and D        
Debt Instrument [Line Items]        
Total corporate and other debt $ 9 $ 7    
Debt instrument, basis spread on variable rate 0.99% 0.99%    
v3.25.4
Credit and Other Debt Agreements - Senior Notes - Additional Information (Detail) - Senior Notes:
$ in Millions
12 Months Ended
Dec. 19, 2024
USD ($)
tranche
Feb. 12, 2024
USD ($)
tranche
Dec. 31, 2024
USD ($)
Dec. 31, 2025
Debt Instrument [Line Items]        
Notes issued and sold $ 5,000 $ 1,000    
Number of tranches | tranche 5 2    
Weighted average interest rate 5.25% 5.71%    
Realized a cash gain (loss) on hedging transaction   $ (1) $ 4  
Derivative instrument, term   10 years 10 years  
Semi-annual payments of interest, fixed rate of 4.60%, balloon due December 15, 2027        
Debt Instrument [Line Items]        
Notes issued and sold $ 750      
Periodic payment of interest 4.60%   4.60% 4.60%
Semi-annual payments of interest, fixed rate of 4.85%, balloon due December 15, 2029        
Debt Instrument [Line Items]        
Notes issued and sold $ 750      
Periodic payment of interest 4.85%   4.85% 4.85%
Semi-annual payments of interest, fixed rate of 5.00%, balloon due February 15, 2032        
Debt Instrument [Line Items]        
Notes issued and sold $ 500      
Periodic payment of interest 5.00%   5.00% 5.00%
Semi-annual payments of interest, fixed rate of 5.15%, balloon due February 15, 2035        
Debt Instrument [Line Items]        
Notes issued and sold $ 1,500      
Periodic payment of interest 5.15%   5.15% 5.15%
Semi-annual payments of interest, fixed rate of 5.55%, balloon due February 15, 2055        
Debt Instrument [Line Items]        
Notes issued and sold $ 1,500      
Periodic payment of interest 5.55%   5.55% 5.55%
Semi-annual payments of interest, fixed rate of 5.45%, balloon due July 15, 2034        
Debt Instrument [Line Items]        
Notes issued and sold   $ 500    
Periodic payment of interest   5.45% 5.45% 5.45%
Semi-annual payments of interest, fixed rate of 5.75%, balloon due July 15, 2054        
Debt Instrument [Line Items]        
Notes issued and sold   $ 500    
Periodic payment of interest   5.75% 5.75% 5.75%
v3.25.4
Credit and Other Debt Agreements - Note Purchase Agreements - Additional Information (Detail) - Note purchase agreements - USD ($)
$ in Millions
1 Months Ended 12 Months Ended
Jun. 30, 2025
Feb. 29, 2024
Dec. 31, 2025
Debt Instrument [Line Items]      
Amount payable to redeem the notes, percent of the principal amount     100.00%
Debt instrument, basis spread on variable rate     0.50%
Series O note      
Debt Instrument [Line Items]      
Operating cash to fund $ 200    
Debt instrument, interest rate 4.31%    
Series HH note      
Debt Instrument [Line Items]      
Operating cash to fund   $ 100  
Debt instrument, interest rate   4.72%  
Series H note      
Debt Instrument [Line Items]      
Operating cash to fund   $ 325  
Debt instrument, interest rate   4.58%  
v3.25.4
Credit and Other Debt Agreements - Credit Agreement - Additional Information (Detail) - USD ($)
12 Months Ended
Apr. 03, 2025
Dec. 31, 2025
Dec. 31, 2024
Debt Instrument [Line Items]      
Long-term debt   $ 47,318,000,000 $ 44,075,000,000
Credit Agreement | Revolving Credit Facility      
Debt Instrument [Line Items]      
Credit facility, term 5 years    
Credit facility, current borrowing capacity $ 2,500,000,000    
Line of credit facility, maximum borrowing capacity 3,000,000,000    
Credit Agreement | Letter of Credit Sub-facility      
Debt Instrument [Line Items]      
Credit facility, current borrowing capacity 75,000,000    
Credit Agreement | Swingline Sub-facility      
Debt Instrument [Line Items]      
Credit facility, current borrowing capacity $ 250,000,000    
Credit Agreement | Standby Letters of Credit      
Debt Instrument [Line Items]      
Line of credit facility, amount outstanding   2,000,000  
Long-term debt   11,000,000  
Line of credit facility, fair value of amount outstanding   0  
Line of credit facility, remaining borrowing capacity   $ 2,498,000,000  
Credit Agreement | Minimum      
Debt Instrument [Line Items]      
Debt instrument, basis spread on variable rate   0.00%  
Fixed rate over SOFR rate, eurocurrency rate or RFR rate   0.775%  
Annual facility fee of revolving credit facility   0.10%  
Credit Agreement | Maximum      
Debt Instrument [Line Items]      
Debt instrument, basis spread on variable rate   0.375%  
Fixed rate over SOFR rate, eurocurrency rate or RFR rate   1.375%  
Annual facility fee of revolving credit facility   0.25%  
v3.25.4
Credit and Other Debt Agreements - Premium Financing Debt Facility - Additional Information (Detail)
$ in Millions, $ in Millions, $ in Millions
12 Months Ended
Dec. 31, 2025
USD ($)
Mar. 02, 2026
AUD ($)
Mar. 02, 2026
NZD ($)
Dec. 31, 2025
AUD ($)
Dec. 31, 2025
NZD ($)
Nov. 17, 2025
AUD ($)
facility
Nov. 17, 2025
NZD ($)
facility
Debt Instrument [Line Items]              
Long-term debt $ 12,873            
Long-term debt, fair value 12,183            
Premium Financing Debt Facility              
Debt Instrument [Line Items]              
Debt instrument, number of facilities | facility           3 3
Premium Financing Debt Facility | Line of Credit              
Debt Instrument [Line Items]              
Line of credit facility, amount outstanding 226            
Debt instrument fair value amount $ 226            
Premium Financing Debt Facility | Facility B | A U D Denominated Tranche              
Debt Instrument [Line Items]              
Line of credit facility, maximum borrowing capacity           $ 390  
Debt instrument, basis spread on variable rate 1.30%            
Annual fee percentage 0.52%            
Line of credit facility, amount outstanding       $ 325      
Line of credit facility, remaining borrowing capacity       65      
Premium Financing Debt Facility | Facility B | A U D Denominated Tranche | Forecast              
Debt Instrument [Line Items]              
Line of credit facility, maximum borrowing capacity   $ 310          
Premium Financing Debt Facility | Facility B | NZD Denominated Tranche              
Debt Instrument [Line Items]              
Line of credit facility, maximum borrowing capacity             $ 25
Debt instrument, basis spread on variable rate 1.85%            
Annual fee percentage 0.8325%            
Line of credit facility, amount outstanding         $ 0    
Line of credit facility, remaining borrowing capacity         25    
Premium Financing Debt Facility | Facility B | NZD Denominated Tranche | Forecast              
Debt Instrument [Line Items]              
Line of credit facility, maximum borrowing capacity     $ 10        
Premium Financing Debt Facility | Facility C | A U D Denominated Tranche              
Debt Instrument [Line Items]              
Line of credit facility, maximum borrowing capacity           $ 60  
Debt instrument, basis spread on variable rate 0.78%            
Annual fee percentage 0.77%            
Line of credit facility, amount outstanding       0      
Line of credit facility, remaining borrowing capacity       $ 60      
Premium Financing Debt Facility | Facility D | NZD Denominated Tranche              
Debt Instrument [Line Items]              
Line of credit facility, maximum borrowing capacity             $ 15
Debt instrument, basis spread on variable rate 0.99%            
Annual fee percentage 0.90%            
Line of credit facility, amount outstanding         15    
Line of credit facility, remaining borrowing capacity         $ 0    
v3.25.4
Earnings Per Share - Computation of Basic and Diluted Net EPS (Detail) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Earnings Per Share [Abstract]      
Net earnings attributable to controlling interests $ 1,494 $ 1,463 $ 970
Weighted average number of common shares outstanding (in shares) 256.1 220.5 214.9
Dilutive effect of stock options using the treasury stock method (in shares) 4.0 4.5 4.4
Weighted average number of common and common equivalent shares outstanding (in shares) 260.1 225.0 219.3
Basic net earnings per share (in dollars per share) $ 5.83 $ 6.63 $ 4.51
Diluted net earnings per share (in dollars per share) $ 5.74 $ 6.50 $ 4.42
v3.25.4
Earnings Per Share - Additional Information (Detail) - shares
shares in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Earnings Per Share [Abstract]      
Anti-dilutive stock-based awards shares outstanding (in shares) 0.9 0.9 0.9
v3.25.4
Stock Option Plans - Additional information (Detail) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Mar. 01, 2025
Mar. 01, 2024
Mar. 15, 2023
May 10, 2022
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Stock Option Plans [Line Items]              
Compensation expense related to stock option grants         $ 54 $ 48 $ 34
Total intrinsic value of options exercised         251 $ 244 $ 182
Total unrecognized compensation cost related to nonvested options         $ 137    
Weighted average period, years         4 years    
Black-Scholes Option Pricing Model              
Stock Option Plans [Line Items]              
Weighted average fair value per option for all options         $ 98.27 $ 69.55 $ 46.48
Long Term Incentive Plan              
Stock Option Plans [Line Items]              
Maximum number of shares available (in shares)         2,100,000    
Stock option granted, share pool (in shares)       13,500,000      
Number of periods options expire         7 years    
Shares available for grant (in shares)         10,200,000    
Long Term Incentive Plan | Full Value Awards In Excess Of The Limit              
Stock Option Plans [Line Items]              
Shares against the pool (in shares)       3.8      
Long Term Incentive Plan | Full Value Awards Up To The Limit              
Stock Option Plans [Line Items]              
Shares against the pool (in shares)       1      
Long Term Incentive Plan | Full Value Awards              
Stock Option Plans [Line Items]              
Maximum number of shares available (in shares)       3,500,000      
Long Term Incentive Plan | Officer and Key Employees              
Stock Option Plans [Line Items]              
Shares available for grant (in shares) 829,000 1,044,000 1,131,000        
Stock options granted, exercise percentage, year one 34.00% 34.00% 34.00%        
Stock options granted, exercise percentage, year two 33.00% 33.00% 33.00%        
Stock options granted, exercise percentage, year three 33.00% 33.00% 33.00%        
Long Term Incentive Plan | Maximum              
Stock Option Plans [Line Items]              
Minimum exercise price of stock options, percent of fair market value of a share of common stock on the date of grant         100.00%    
2017 Long Term Incentive Plan | Maximum              
Stock Option Plans [Line Items]              
Maximum period for the exercise of stock options, years         7 years 7 years 7 years
2017 Long Term Incentive Plan | Minimum              
Stock Option Plans [Line Items]              
Period of service from grant date stock options awarded not subject to forfeiture             2 years
2017 Long Term Incentive Plan | Minimum | Executive Officer              
Stock Option Plans [Line Items]              
Minimum age of employee with not subject to award forfeiture on condition compliance         62 years 62 years 55 years
v3.25.4
Stock Option Plans - Black-Scholes Option Pricing Model with Weighted Average (Detail)
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Share-Based Payment Arrangement [Abstract]      
Expected dividend yield 0.80% 1.00% 1.20%
Expected risk-free interest rate 4.10% 4.20% 3.60%
Volatility 25.40% 25.30% 25.00%
Expected life (in years) 5 years 6 months 5 years 6 months 5 years 6 months
v3.25.4
Stock Option Plans - Stock Option Activity and Related Information (Detail) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Shares Under Option    
Shares Under Option, Beginning balance (in shares) 7.3 7.9
Shares Under Option, Granted (in shares) 0.8 1.0
Shares Under Option, Exercised (in shares) (1.2) (1.4)
Shares Under Option, Forfeited or canceled (in shares) (0.2) (0.2)
Shares Under Option, Ending balance (in shares) 6.7 7.3
Shares Under Option, Exercisable at end of period (in shares) 2.2 1.7
Shares Under Option, Ending unvested and expected to vest (in shares) 4.3 5.2
Weighted Average Exercise Price    
Weighted Average Exercise Price, Beginning balance (in dollars per share) $ 148.26 $ 123.85
Weighted Average Exercise Price, Granted (in dollars per share) 337.75 243.54
Weighted Average Exercise Price, Exercised (in dollars per share) 104.78 77.93
Weighted Average Exercise Price, Forfeited or canceled (in dollars per share) 196.67 160.87
Weighted Average Exercise Price, Ending balance (in dollars per share) 177.48 148.26
Weighted Average Exercise Price, Exercisable at end of period (in dollars per share) 111.16 90.06
Weighted Average Exercise Price, Ending unvested and expected to vest (in dollars per share) $ 206.25 $ 164.49
Weighted Average Remaining Contractual Term (in years), Ending balance 3 years 5 months 4 days 3 years 9 months 10 days
Weighted Average Remaining Contractual Term (in years), Exercisable at end of year 1 year 8 months 15 days 1 year 9 months 10 days
Weighted Average Remaining Contractual Term (in years), Ending unvested and expected to vest 4 years 2 months 12 days 4 years 4 months 24 days
Aggregate Intrinsic Value, Ending Balance $ 609 $ 995
Aggregate Intrinsic Value, Exercisable at end of year 320 337
Aggregate Intrinsic Value, Ending unvested and expected to vest $ 279 $ 624
v3.25.4
Stock Option Plans - Stock Options Outstanding and Exercisable (Detail) - $ / shares
shares in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]      
Range of Exercise Prices, minimum (in dollars per share) $ 79.59    
Range of Exercise Prices, maximum (in dollars per share) $ 347.44    
Option Outstanding, Number Outstanding (in shares) 6.7    
Option Outstanding, Weighted Average Remaining Contractual Term (in years) 3 years 5 months 4 days 3 years 9 months 10 days  
Option Outstanding, Weighted Average Exercise Price (in dollars per share) $ 177.48 $ 148.26 $ 123.85
Options Exercisable, Number Exercisable (in shares) 2.2    
Option Exercisable, Weighted Average Exercise Price (in dollars per share) $ 111.16    
Exercise Prices Range $ 70.74 - $ 70.74      
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]      
Range of Exercise Prices, minimum (in dollars per share) 79.59    
Range of Exercise Prices, maximum (in dollars per share) $ 79.59    
Option Outstanding, Number Outstanding (in shares) 0.3    
Option Outstanding, Weighted Average Remaining Contractual Term (in years) 2 months 12 days    
Option Outstanding, Weighted Average Exercise Price (in dollars per share) $ 79.59    
Options Exercisable, Number Exercisable (in shares) 0.3    
Option Exercisable, Weighted Average Exercise Price (in dollars per share) $ 79.59    
Exercise Prices Range $ 79.59 - $ 79.59      
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]      
Range of Exercise Prices, minimum (in dollars per share) 86.17    
Range of Exercise Prices, maximum (in dollars per share) $ 86.17    
Option Outstanding, Number Outstanding (in shares) 0.8    
Option Outstanding, Weighted Average Remaining Contractual Term (in years) 1 year 2 months 8 days    
Option Outstanding, Weighted Average Exercise Price (in dollars per share) $ 86.17    
Options Exercisable, Number Exercisable (in shares) 0.8    
Option Exercisable, Weighted Average Exercise Price (in dollars per share) $ 86.17    
Exercise Prices Range $ 86.17 - $ 86.17      
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]      
Range of Exercise Prices, minimum (in dollars per share) 127.90    
Range of Exercise Prices, maximum (in dollars per share) $ 127.90    
Option Outstanding, Number Outstanding (in shares) 1.1    
Option Outstanding, Weighted Average Remaining Contractual Term (in years) 2 years 2 months 15 days    
Option Outstanding, Weighted Average Exercise Price (in dollars per share) $ 127.90    
Options Exercisable, Number Exercisable (in shares) 0.7    
Option Exercisable, Weighted Average Exercise Price (in dollars per share) $ 127.90    
Exercise Prices Range $ 127.90 - $ 127.90      
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]      
Range of Exercise Prices, minimum (in dollars per share) 156.85    
Range of Exercise Prices, maximum (in dollars per share) $ 156.85    
Option Outstanding, Number Outstanding (in shares) 0.8    
Option Outstanding, Weighted Average Remaining Contractual Term (in years) 3 years 1 month 2 days    
Option Outstanding, Weighted Average Exercise Price (in dollars per share) $ 156.85    
Options Exercisable, Number Exercisable (in shares) 0.2    
Option Exercisable, Weighted Average Exercise Price (in dollars per share) $ 156.85    
Exercise Prices Range $ 156.85 - $ 156.85      
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]      
Range of Exercise Prices, minimum (in dollars per share) 158.56    
Range of Exercise Prices, maximum (in dollars per share) $ 161.14    
Option Outstanding, Number Outstanding (in shares) 0.9    
Option Outstanding, Weighted Average Remaining Contractual Term (in years) 3 years 2 months 15 days    
Option Outstanding, Weighted Average Exercise Price (in dollars per share) $ 158.64    
Options Exercisable, Number Exercisable (in shares) 0.2    
Option Exercisable, Weighted Average Exercise Price (in dollars per share) $ 158.59    
Exercise Prices Range $ 158.56 - $ 161.14      
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]      
Range of Exercise Prices, minimum (in dollars per share) 177.09    
Range of Exercise Prices, maximum (in dollars per share) $ 202.13    
Option Outstanding, Number Outstanding (in shares) 1.0    
Option Outstanding, Weighted Average Remaining Contractual Term (in years) 4 years 2 months 12 days    
Option Outstanding, Weighted Average Exercise Price (in dollars per share) $ 177.77    
Options Exercisable, Number Exercisable (in shares) 0.0    
Option Exercisable, Weighted Average Exercise Price (in dollars per share) $ 0    
Exercise Prices Range $ 177.09 - $ 202.13      
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]      
Range of Exercise Prices, minimum (in dollars per share) 238.88    
Range of Exercise Prices, maximum (in dollars per share) $ 243.54    
Option Outstanding, Number Outstanding (in shares) 1.0    
Option Outstanding, Weighted Average Remaining Contractual Term (in years) 5 years 1 month 28 days    
Option Outstanding, Weighted Average Exercise Price (in dollars per share) $ 243.54    
Options Exercisable, Number Exercisable (in shares) 0.0    
Option Exercisable, Weighted Average Exercise Price (in dollars per share) $ 0    
Exercise Prices Range $ 238.88 - $ 243.54      
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]      
Range of Exercise Prices, minimum (in dollars per share) 337.74    
Range of Exercise Prices, maximum (in dollars per share) $ 347.44    
Option Outstanding, Number Outstanding (in shares) 0.8    
Option Outstanding, Weighted Average Remaining Contractual Term (in years) 6 years 1 month 28 days    
Option Outstanding, Weighted Average Exercise Price (in dollars per share) $ 337.75    
Options Exercisable, Number Exercisable (in shares) 0.0    
Option Exercisable, Weighted Average Exercise Price (in dollars per share) $ 0    
v3.25.4
Deferred Compensation - Additional Information (Detail) - USD ($)
shares in Millions, $ in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Deferred Equity Participation Plan (DEPP)            
Investments And Employee Deferred Compensation Plan [Line Items]            
Awards approved by committee, value $ 22 $ 23 $ 25      
Charge to compensation expenses related to awards       $ 18 $ 21 $ 22
Unearned deferred compensation, value       $ 81 $ 77  
Unearned deferred compensation, shares (in shares)       1.8 2.2  
Total intrinsic value of unvested equity based awards       $ 475 $ 616  
Vesting period, years       1 year    
Cash and equity awards with aggregate fair value vested and distributed to participants       $ 83 40 78
Deferred Equity Participation Plan Sub Plans            
Investments And Employee Deferred Compensation Plan [Line Items]            
Awards approved by committee, value       2 2 3
Charge to compensation expenses related to awards       2 2 3
Distributions from the sub-plans       $ 13 3 14
Deferred Equity Participation Plan Sub Plans | Minimum            
Investments And Employee Deferred Compensation Plan [Line Items]            
Vesting period, years       5 years    
Deferred Equity Participation Plan Sub Plans | Maximum            
Investments And Employee Deferred Compensation Plan [Line Items]            
Vesting period, years       15 years    
Deferred Cash Participation Plan (DCPP)            
Investments And Employee Deferred Compensation Plan [Line Items]            
Awards approved by committee, value $ 8 $ 8 $ 10      
Charge to compensation expenses related to awards       $ 14 19 17
Vesting period, years       5 years    
Cash and equity awards with aggregate fair value vested and distributed to participants       $ 41 $ 44 $ 23
v3.25.4
Restricted Stock, Performance Share and Cash Awards - Additional Information (Detail)
$ in Millions
3 Months Ended 12 Months Ended
Mar. 01, 2025
USD ($)
shares
Mar. 01, 2024
USD ($)
shares
Mar. 15, 2023
USD ($)
shares
Dec. 31, 2025
USD ($)
shares
Sep. 30, 2025
USD ($)
shares
Jun. 30, 2025
shares
Mar. 31, 2025
shares
Dec. 31, 2024
USD ($)
shares
Sep. 30, 2024
shares
Jun. 30, 2024
shares
Mar. 31, 2024
shares
Mar. 31, 2023
shares
Dec. 31, 2025
USD ($)
TIME
shares
Dec. 31, 2024
USD ($)
shares
Dec. 31, 2023
USD ($)
shares
Dec. 31, 2022
USD ($)
Mar. 15, 2022
USD ($)
shares
Minimum | Former AssuredPartners Employee, Employed With Gallagher                                  
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]                                  
Vesting period, years         2 years                        
Maximum | Former AssuredPartners Employee, Employed With Gallagher                                  
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]                                  
Vesting period, years         5 years                        
Restricted Stock Units (RSUs)                                  
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]                                  
Shares granted in the period (in shares) | shares       300 1,000 297,000 2,300 700 800 344,600 390,000 304,709 355,245 396,913    
Period of service from grant date stock options awarded not subject to forfeiture                         2 years 2 years 2 years    
Restricted stock or unit expense | $                         $ 75 $ 54 $ 43    
Restricted Stock Units (RSUs) | Employee Employed By AssuredPartners                                  
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]                                  
Shares granted in the period (in shares) | shares         341,700                        
Fair value of grants in period | $         $ 100                        
Restricted Stock Units (RSUs) | Former AssuredPartners Employee, Employed With Gallagher                                  
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]                                  
Shares granted in the period (in shares) | shares         708,000                        
Fair value of grants in period | $         $ 215                        
Unvested Restricted Stock                                  
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]                                  
Total intrinsic value | $       $ 643       $ 549         643 549      
Equity awards with an aggregate fair value | $                         $ 213 $ 94      
Cash Awards                                  
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]                                  
Shares granted in the period (in shares) | shares                         0 0      
Cash Awards | Officer and Key Employees                                  
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]                                  
Vesting period, years                         3 years        
Performance awards period, years                         1 year        
Ultimate award value, multiples of original value of the units, minimum | TIME                         0.5        
Ultimate award value, multiples of original value of the units, maximum | TIME                         1.5        
2022 Provisional Cash Awards                                  
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]                                  
Provisional compensation cash award approved for future grant by compensation committee (in shares) | shares       111,000                 111,000        
Cash-based compensation awards, expenses | $                         $ 0 $ 13 $ 13 $ 0  
Cash award with aggregate fair value vested and distributed to participants | $                         $ 27        
2022 Provisional Cash Awards | Officer and Key Employees                                  
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]                                  
Share-based compensation arrangement, conversion ratio to common stock                                 1
Provisional compensation cash awards approved for future grant by compensation committee, value | $                                 $ 20
Provisional compensation cash award approved for future grant by compensation committee (in shares) | shares                       122,000         125,000
2021 Provisional Cash Awards                                  
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]                                  
Provisional compensation cash award approved for future grant by compensation committee (in shares) | shares               129,000           129,000      
Cash award with aggregate fair value vested and distributed to participants | $                           $ 25      
2020 Provisional Cash Awards                                  
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]                                  
Provisional compensation cash award approved for future grant by compensation committee (in shares) | shares                             191,000    
Cash award with aggregate fair value vested and distributed to participants | $                             $ 25    
Long Term Incentive Plan                                  
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]                                  
Shares available for grant (in shares) | shares       10,200,000                 10,200,000        
Shares granted in the period (in shares) | shares                         2,100,000        
Long Term Incentive Plan | Officer and Key Employees                                  
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]                                  
Shares available for grant (in shares) | shares 829,000 1,044,000 1,131,000                            
Long Term Incentive Plan | Restricted Stock, Restricted Stock Units and Performance Unit Awards                                  
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]                                  
Shares authorized (in shares) | shares       4,000,000.0                 4,000,000.0        
Shares available for grant (in shares) | shares       2,100,000                 2,100,000        
Long Term Incentive Plan | Restricted Stock Units (RSUs)                                  
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]                                  
Shares granted in the period (in shares) | shares                         304,709 355,245 396,913    
Fair value of grants in period | $                         $ 101 $ 85 $ 67    
Long Term Incentive Plan | Performance Shares                                  
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]                                  
Shares authorized (in shares) | shares 68,000 58,000 58,000                            
Restricted stock or unit expense | $                         26 22 20    
Total intrinsic value | $       $ 88       $ 93         88 93      
Equity awards with an aggregate fair value | $                         $ 36 $ 32 $ 29    
Performance share awards approved, fair value | $ $ 22 $ 14 $ 10                            
Share-based compensation arrangement, conversion ratio to common stock 1 1 1                            
Vesting period, years 3 years 3 years 3 years                            
Long Term Incentive Plan | Performance Shares | Executive Officer | Minimum                                  
Common Stock Options Restricted Stock Warrants And Changes In Capitalization [Line Items]                                  
Period of service from grant date stock options awarded not subject to forfeiture     2 years                            
Minimum age of employee with not subject to award forfeiture on condition compliance   62 years 55 years                            
v3.25.4
Restricted Stock, Performance Share and Cash Awards - Schedule of Restricted Stock Awards Vesting Periods (Detail) - Restricted Stock Units Granted - shares
3 Months Ended 12 Months Ended
Dec. 31, 2025
Sep. 30, 2025
Jun. 30, 2025
Mar. 31, 2025
Dec. 31, 2024
Sep. 30, 2024
Jun. 30, 2024
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Vesting Period [Line Items]                        
Shares granted in the period (in shares) 300 1,000 297,000 2,300 700 800 344,600 390,000 304,709 355,245 396,913
One year                        
Vesting Period [Line Items]                        
Shares granted in the period (in shares)                   6,210 6,800 7,360
Vesting period, years                   1 year    
Five years                        
Vesting Period [Line Items]                        
Shares granted in the period (in shares)                   298,499 348,445 389,553
Vesting period, years                   5 years    
v3.25.4
Retirement Plans - Additional Information (Detail)
3 Months Ended 12 Months Ended
Dec. 31, 2025
USD ($)
enterprise
Dec. 31, 2026
USD ($)
Dec. 31, 2025
USD ($)
enterprise
Dec. 31, 2024
USD ($)
plan
Dec. 31, 2023
USD ($)
Defined Benefit Plan Disclosure [Line Items]          
Retirement benefits, required employment period     1 year    
Number of frozen defined benefit pension plans | plan       3  
Defined benefit plan, non-cash, pre-tax loss due to plan termination $ (16,000,000)   $ (16,000,000) $ 0 $ 0
Adjustment to consolidated statement of comprehensive earnings (12,000,000)   (18,000,000) $ (13,000,000) (17,000,000)
Reversal of deferred tax asset 4,000,000   $ 4,000,000    
Expected period of return on plan assets, years     10 years 10 years  
Discretionary contributions by employer     $ 0 $ 0 0
Funded status of the plan (underfunded) 17,000,000   17,000,000 16,000,000  
Fair value of plan assets $ 20,000,000   $ 20,000,000 312,000,000 229,000,000
Number of life underwriting enterprises | enterprise 2   2    
Forecast          
Defined Benefit Plan Disclosure [Line Items]          
Defined benefit plan, non-cash, pre-tax loss due to plan termination   $ (17,000,000)      
Foreign Retirement Plans          
Defined Benefit Plan Disclosure [Line Items]          
Matching contributions by employer, percentage     100.00%    
Percentage of employer matching contributions on eligible compensation     5.00%    
Contribution expense to plan     $ 105,000,000 $ 93,000,000 $ 77,000,000
Additional percentage of eligible compensation for matching contributions by employer     5.00%    
Qualified Contributory Savings and Thrift 401(k) Plan          
Defined Benefit Plan Disclosure [Line Items]          
Matching contributions by employer, percentage     100.00%    
Percentage of employer matching contributions on eligible compensation     5.00% 5.00% 5.00%
Matching contributions vesting schedule     5 years    
Contribution expense to plan     $ 115,000,000 $ 105,000,000 $ 86,000,000
Nonqualified Deferred Compensation Plan          
Defined Benefit Plan Disclosure [Line Items]          
Percentage of employer matching contributions on eligible compensation     5.00%    
Contribution expense to plan     $ 17,000,000 14,000,000 $ 12,000,000
Fair value of plan assets $ 1,046,000,000   $ 1,046,000,000 $ 909,000,000  
v3.25.4
Retirement Plans - Reconciliation of Balances of Pension Benefit Obligation and Fair Value of Plan Assets (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Change in pension benefit obligation:      
Benefit obligation at beginning of year $ 296 $ 216  
Service cost 1 1 $ 3
Interest cost 16 10 11
Merger of the Buck U.S. pension plan 0 95  
Net actuarial loss (gain) 2 (11)  
Settlement (293) 0  
Benefits paid (19) (15)  
Benefit obligation at end of year $ 3 $ 296 $ 216
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Interest Cost, Statement of Income or Comprehensive Income [Extensible Enumeration] Compensation Compensation Compensation
Change in plan assets:      
Fair value of plan assets at beginning of year $ 312 $ 229  
Actual return on plan assets 19 15  
Merger of the Buck U.S. pension plan 0 84  
Contributions by the Company 1 0  
Settlement (293) 0  
Benefits paid (19) (16)  
Fair value of plan assets at end of year 20 312 $ 229
Funded status of the plan (underfunded) 17 16  
Amounts recognized in the consolidated balance sheet consist of:      
Prepaid pension asset 17 16  
Accumulated other comprehensive income 0 18  
Net amount included in retained earnings $ 17 $ 34  
v3.25.4
Retirement Plans - Components of Net Periodic Pension Benefit Cost and Other Changes in Plan Assets and Obligations Recognized in Earnings and Other Comprehensive Earnings (Detail) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Net periodic pension cost:        
Service cost   $ 1 $ 1 $ 3
Interest cost on benefit obligation   16 10 11
Expected return on plan assets   (15) (16) (14)
Amortization of net loss   0 3 5
Settlement $ 16 16 0 0
Net periodic benefit income (cost)   $ 18 $ (2) $ 5
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Expected Return (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]   Compensation Compensation Compensation
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Amortization of Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]   Compensation Compensation Compensation
Other changes in plan assets and obligations recognized in other comprehensive earnings:        
Net (gain) incurred   $ (2) $ (10) $ (12)
Amortization of net loss   (16) (3) (5)
Total recognized in other comprehensive (loss) $ (12) (18) (13) (17)
Total recognized in net periodic pension cost and other comprehensive (loss)   $ 0 $ (15) $ (12)
v3.25.4
Retirement Plans - Weighted Average Assumptions of Pension Benefit Obligation and Net Periodic Pension Benefit Cost (Detail)
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Retirement Benefits [Abstract]      
Discount rate, pension benefit obligation   5.50%  
Weighted average expected long-term rate of return on plan assets, pension benefit obligation 5.00% 7.00%  
Discount rate, net periodic pension benefit cost 5.50% 4.75% 5.25%
Weighted average expected long-term rate of return on plan assets, net periodic pension benefit cost 5.00% 7.00% 7.00%
v3.25.4
Retirement Plans - Schedule of Benefit Payments Expected to be Paid by Plan (Detail)
$ in Millions
Dec. 31, 2025
USD ($)
Retirement Benefits [Abstract]  
2026 $ 17
2027 0
2028 0
2029 0
2030 0
2030 to 2034 $ 0
v3.25.4
Retirement Plans - Summary of Plan's Weighted Average Asset Allocations (Detail)
Dec. 31, 2025
Dec. 31, 2024
Defined Benefit Plan Disclosure [Line Items]    
Total weighted average asset 100.00% 100.00%
Equity securities    
Defined Benefit Plan Disclosure [Line Items]    
Total weighted average asset 0.00% 0.00%
Debt securities    
Defined Benefit Plan Disclosure [Line Items]    
Total weighted average asset 100.00% 100.00%
Real estate    
Defined Benefit Plan Disclosure [Line Items]    
Total weighted average asset 0.00% 0.00%
v3.25.4
Retirement Plans - Summary of Plan's Assets Carried at Fair Value (Detail) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]      
Total fair value $ 20 $ 312 $ 229
Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Total fair value 0 0  
Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Total fair value 18 205  
Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Total fair value $ 2 $ 107 $ 109
v3.25.4
Retirement Plans - Reconciliation of Beginning and Ending Balances for Level 3 Assets of Plan Measured at Fair Value (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Change in plan assets:    
Fair value of plan assets at beginning of year $ 312 $ 229
Fair value of plan assets at end of year 20 312
Level 3    
Change in plan assets:    
Fair value of plan assets at beginning of year 107 109
Settlements (111) (11)
Unrealized gain 6 9
Fair value of plan assets at end of year $ 2 $ 107
v3.25.4
Leases - Components of Lease Expense (Detail)
$ in Millions
12 Months Ended
Dec. 31, 2025
USD ($)
Lessee, Lease, Description [Line Items]  
Total net lease expense $ 197
Operating expense  
Lessee, Lease, Description [Line Items]  
Operating lease expense 167
Variable lease expense 32
Investment income  
Lessee, Lease, Description [Line Items]  
Sublease income $ (2)
v3.25.4
Leases - Summary of Supplemental Cash Flow Information Related to Leases (Detail)
$ in Millions
12 Months Ended
Dec. 31, 2025
USD ($)
Cash paid for amounts included in the measurement of lease liabilities:  
Operating cash flows from operating leases $ 155
Right-of-use assets obtained in exchange for new operating lease liabilities $ 343
v3.25.4
Leases - Summary of Supplemental Balance Sheet Information Related to Leases (Detail) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Leases [Abstract]    
Lease right-of-use assets $ 598 $ 378
Other current lease liabilities $ 131  
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Accrued compensation and other current liabilities  
Lease liabilities $ 515 $ 328
Total lease liabilities $ 646  
Weighted-average remaining lease term, years 6 years 1 month 6 days  
Weighted-average discount rate 4.90%  
v3.25.4
Leases - Maturities of Operating Lease Liabilities (Detail)
$ in Millions
Dec. 31, 2025
USD ($)
Leases [Abstract]  
2026 $ 173
2027 148
2028 111
2029 84
2030 73
Thereafter 184
Total lease payments 773
Less interest (127)
Total $ 646
v3.25.4
Leases - Additional Information (Detail)
$ in Millions
Dec. 31, 2025
USD ($)
Lessee, Lease, Description [Line Items]  
Lessee, operating lease, renewal term 10 years
Operating lease liability not yet commenced $ 72
Minimum  
Lessee, Lease, Description [Line Items]  
Operating lease, remaining lease term 0 years
Lessee, operating lease, lease not yet commenced, term of contract 6 months
Maximum  
Lessee, Lease, Description [Line Items]  
Operating lease, remaining lease term 12 years 3 months 18 days
Lessee, operating lease, lease not yet commenced, term of contract 12 years
v3.25.4
Derivatives and Hedging Activity - Additional Information (Detail)
$ in Millions
12 Months Ended
Dec. 31, 2025
USD ($)
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Maximum length of time hedged in interest rate cash flow hedge 3 years
Maximum length of time hedged in foreign exchange risk 3 years
Estimated pretax gain to be reclassified from accumulated other comprehensive income into earnings $ 21
v3.25.4
Derivatives and Hedging Activity - Summary of Notional and Fair Values of Derivative Instruments (Detail) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Derivatives, Fair Value [Line Items]    
Notional Amount $ 1,899 $ 24
Derivative Assets, Fair Value 23 9
Derivative Liabilities, Fair Value $ 12 $ 5
Derivative Liability, Statement of Financial Position [Extensible Enumeration] Other noncurrent liabilities (includes tax credit carryforwards of $713 in 2025), Accrued compensation and other current liabilities Other noncurrent liabilities (includes tax credit carryforwards of $713 in 2025), Accrued compensation and other current liabilities
Derivative Asset, Statement of Financial Position [Extensible Enumeration] Other current assets, Other noncurrent assets Other current assets, Other noncurrent assets
Interest rate contracts    
Derivatives, Fair Value [Line Items]    
Notional Amount $ 1,500 $ 0
Interest rate contracts | Other current assets    
Derivatives, Fair Value [Line Items]    
Derivative Assets, Fair Value 7 0
Interest rate contracts | Other noncurrent assets    
Derivatives, Fair Value [Line Items]    
Derivative Assets, Fair Value 0 0
Interest rate contracts | Accrued compensation and other current liabilities    
Derivatives, Fair Value [Line Items]    
Derivative Liabilities, Fair Value 8 0
Interest rate contracts | Other noncurrent liabilities    
Derivatives, Fair Value [Line Items]    
Derivative Liabilities, Fair Value 0 0
Foreign exchange contracts    
Derivatives, Fair Value [Line Items]    
Notional Amount 399 24
Foreign exchange contracts | Call Options    
Derivatives, Fair Value [Line Items]    
Foreign exchange derivative contracts 790 595
Foreign exchange contracts | Call Options | Forward Contracts    
Derivatives, Fair Value [Line Items]    
Foreign exchange derivative contracts 399 26
Foreign exchange contracts | Put Options    
Derivatives, Fair Value [Line Items]    
Foreign exchange derivative contracts 790 595
Foreign exchange contracts | Put Options | Forward Contracts    
Derivatives, Fair Value [Line Items]    
Foreign exchange derivative contracts 0 1
Foreign exchange contracts | Other current assets    
Derivatives, Fair Value [Line Items]    
Derivative Assets, Fair Value 8 6
Foreign exchange contracts | Other noncurrent assets    
Derivatives, Fair Value [Line Items]    
Derivative Assets, Fair Value 8 3
Foreign exchange contracts | Accrued compensation and other current liabilities    
Derivatives, Fair Value [Line Items]    
Derivative Liabilities, Fair Value 1 2
Foreign exchange contracts | Other noncurrent liabilities    
Derivatives, Fair Value [Line Items]    
Derivative Liabilities, Fair Value $ 3 $ 3
v3.25.4
Derivatives and Hedging Activity - Summary of Amounts of Derivative Gains (Losses) Recognized In Accumulated Other Comprehensive Loss (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of Gain (Loss) Recognized in Accumulated Other Comprehensive Loss (1) $ (21) $ (17)  
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Loss into Earnings (16) (7) $ 3
Amount of Gain (Loss) Recognized in Earnings Related to Amount Excluded from Effectiveness Testing 1 1  
Other comprehensive income (loss), foreign currency transaction and translation adjustment, net of tax 630 (365) $ 259
Foreign Exchange [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Other comprehensive income (loss), foreign currency transaction and translation adjustment, net of tax 2    
Interest rate contracts      
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Loss into Earnings (1) (1)  
Amount of Gain (Loss) Recognized in Earnings Related to Amount Excluded from Effectiveness Testing 0 0  
Foreign exchange contracts      
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Loss into Earnings (13) (2)  
Amount of Gain (Loss) Recognized in Earnings Related to Amount Excluded from Effectiveness Testing 0 0  
Interest expense | Interest rate contracts      
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of Gain (Loss) Recognized in Accumulated Other Comprehensive Loss (1) (16) (6)  
Commission revenue | Foreign exchange contracts      
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of Gain (Loss) Recognized in Accumulated Other Comprehensive Loss (1) (5) (11)  
Compensation expense      
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Loss into Earnings (1) (2)  
Amount of Gain (Loss) Recognized in Earnings Related to Amount Excluded from Effectiveness Testing 1 1  
Operating expense      
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Loss into Earnings (1) (2)  
Amount of Gain (Loss) Recognized in Earnings Related to Amount Excluded from Effectiveness Testing $ 0 $ 0  
v3.25.4
Commitments, Contingencies and Off-Balance Sheet Arrangements - Contractual Obligations (Detail)
$ in Millions
Dec. 31, 2025
USD ($)
Senior Notes  
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]  
Contractual Obligations, Payments Due by Period, 2026 $ 0
Contractual Obligations, Payments Due by Period, 2027 750
Contractual Obligations, Payments Due by Period, 2028 0
Contractual Obligations, Payments Due by Period, 2029 750
Contractual Obligations, Payments Due by Period, 2030 0
Contractual Obligations, Payments Due by Period, Thereafter 8,050
Contractual Obligations, Payments Due by Period, Total 9,550
Note purchase agreements  
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]  
Contractual Obligations, Payments Due by Period, 2026 640
Contractual Obligations, Payments Due by Period, 2027 478
Contractual Obligations, Payments Due by Period, 2028 200
Contractual Obligations, Payments Due by Period, 2029 350
Contractual Obligations, Payments Due by Period, 2030 466
Contractual Obligations, Payments Due by Period, Thereafter 1,189
Contractual Obligations, Payments Due by Period, Total 3,323
Credit Agreement  
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]  
Contractual Obligations, Payments Due by Period, 2026 0
Contractual Obligations, Payments Due by Period, 2027 0
Contractual Obligations, Payments Due by Period, 2028 0
Contractual Obligations, Payments Due by Period, 2029 0
Contractual Obligations, Payments Due by Period, 2030 0
Contractual Obligations, Payments Due by Period, Thereafter 0
Contractual Obligations, Payments Due by Period, Total 0
Premium Financing Debt Facility  
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]  
Contractual Obligations, Payments Due by Period, 2026 226
Contractual Obligations, Payments Due by Period, 2027 0
Contractual Obligations, Payments Due by Period, 2028 0
Contractual Obligations, Payments Due by Period, 2029 0
Contractual Obligations, Payments Due by Period, 2030 0
Contractual Obligations, Payments Due by Period, Thereafter 0
Contractual Obligations, Payments Due by Period, Total 226
Interest on debt  
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]  
Contractual Obligations, Payments Due by Period, 2026 612
Contractual Obligations, Payments Due by Period, 2027 593
Contractual Obligations, Payments Due by Period, 2028 539
Contractual Obligations, Payments Due by Period, 2029 528
Contractual Obligations, Payments Due by Period, 2030 473
Contractual Obligations, Payments Due by Period, Thereafter 6,117
Contractual Obligations, Payments Due by Period, Total 8,862
Total debt obligations  
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]  
Contractual Obligations, Payments Due by Period, 2026 1,478
Contractual Obligations, Payments Due by Period, 2027 1,821
Contractual Obligations, Payments Due by Period, 2028 739
Contractual Obligations, Payments Due by Period, 2029 1,628
Contractual Obligations, Payments Due by Period, 2030 939
Contractual Obligations, Payments Due by Period, Thereafter 15,356
Contractual Obligations, Payments Due by Period, Total 21,961
Operating lease obligations  
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]  
Contractual Obligations, Payments Due by Period, 2026 173
Contractual Obligations, Payments Due by Period, 2027 148
Contractual Obligations, Payments Due by Period, 2028 111
Contractual Obligations, Payments Due by Period, 2029 84
Contractual Obligations, Payments Due by Period, 2030 73
Contractual Obligations, Payments Due by Period, Thereafter 184
Contractual Obligations, Payments Due by Period, Total 773
Less sublease arrangements  
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]  
Contractual Obligations, Payments Receivable by Period, 2026 (3)
Contractual Obligations, Payments Receivable by Period, 2027 (2)
Contractual Obligations, Payments Receivable by Period, 2028 (2)
Contractual Obligations, Payments Receivable by Period, 2029 (2)
Contractual Obligations, Payments Receivable by Period, 2030 0
Contractual Obligations, Payments Receivable by Period, Thereafter 0
Contractual Obligations, Payments Receivable by Period, Total (9)
Outstanding purchase obligations  
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]  
Contractual Obligations, Payments Due by Period, 2026 278
Contractual Obligations, Payments Due by Period, 2027 227
Contractual Obligations, Payments Due by Period, 2028 101
Contractual Obligations, Payments Due by Period, 2029 50
Contractual Obligations, Payments Due by Period, 2030 26
Contractual Obligations, Payments Due by Period, Thereafter 42
Contractual Obligations, Payments Due by Period, Total 724
Total contractual obligations  
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]  
Contractual Obligations, Payments Due by Period, 2026 1,926
Contractual Obligations, Payments Due by Period, 2027 2,194
Contractual Obligations, Payments Due by Period, 2028 949
Contractual Obligations, Payments Due by Period, 2029 1,760
Contractual Obligations, Payments Due by Period, 2030 1,038
Contractual Obligations, Payments Due by Period, Thereafter 15,582
Contractual Obligations, Payments Due by Period, Total $ 23,449
v3.25.4
Commitments, Contingencies and Off-Balance Sheet Arrangements - Additional Information (Detail)
$ in Millions
12 Months Ended
Dec. 31, 2025
USD ($)
ft²
letterOfCredit
employee
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]      
Number of square feet | ft² 360,000    
Number of employees will accommodate at new facility | employee 2,000    
Total rent expense $ 208 $ 183 $ 184
Aggregate amount of maximum earnout obligations related to acquisitions 1,518 1,998  
Aggregate amount of maximum earnout obligations related to acquisitions, recorded in consolidated balance sheet 773 1,302  
Aggregate amount of earnout obligation expected settlement in cash or common stock at option 535 512  
Aggregate amount of earnout obligation expected settlement in cash 238 $ 790  
Long-term debt 12,873    
Liabilities recorded on self-insurance $ 11    
Collateral      
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]      
Number of letters of credit issued | letterOfCredit 1    
Self-Insurance Deductibles      
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]      
Number of letters of credit issued | letterOfCredit 1    
Rent-A-Captive Facility      
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]      
Number of letters of credit issued | letterOfCredit 11    
Errors And Omissions | Up to $15.0 Million      
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]      
Insurance claims, amount retained $ 15    
Errors And Omissions | Up to $2.0 Million      
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]      
Insurance claims, amount retained 2    
Errors And Omissions | Up to $10.0 Million      
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]      
Insurance claims, amount retained 10    
Errors And Omissions | Up to $20.0 Million      
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]      
Insurance claims, amount retained 20    
Letter of Credit | Security Deposit      
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]      
Long-term debt 1    
Letter of Credit | Self-Insurance Deductibles      
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]      
Liabilities recorded on self-insurance 11    
Letter of Credit | Rent-A-Captive Facility      
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]      
Long-term debt $ 13    
Minimum      
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]      
Business combination, earnout payable evaluation period 2 years    
Minimum | Errors And Omissions      
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]      
Loss contingency accrual, product liability $ 9    
Minimum | Errors And Omissions | Up to $2.0 Million      
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]      
Insurance claim arise during ordinary course of business 15    
Minimum | Errors And Omissions | Up to $10.0 Million      
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]      
Insurance claim arise during ordinary course of business 100    
Minimum | Errors And Omissions | Up to $20.0 Million      
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]      
Insurance claim arise during ordinary course of business $ 200    
Minimum | Unconsolidated Investments in Enterprises      
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]      
Ownership interest 1.00%    
Maximum      
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]      
Business combination, earnout payable evaluation period 3 years    
Maximum | Errors And Omissions      
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]      
Loss contingency accrual, product liability $ 8    
Maximum | Errors And Omissions | Up to $2.0 Million      
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]      
Insurance claim arise during ordinary course of business 100    
Maximum | Errors And Omissions | Up to $10.0 Million      
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]      
Insurance claim arise during ordinary course of business 200    
Maximum | Errors And Omissions | Up to $20.0 Million      
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]      
Insurance claim arise during ordinary course of business $ 400    
Maximum | Unconsolidated Investments in Enterprises      
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]      
Ownership interest 50.00%    
Tax Increment Financing      
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]      
Economic development for growing economy tax credit $ 75    
v3.25.4
Commitments, Contingencies and Off-Balance Sheet Arrangements - Off-Balance Sheet Commitments (Detail)
$ in Millions
12 Months Ended
Dec. 31, 2025
USD ($)
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]  
Amount of Commitment Expiration by Period - 2026 $ 0
Amount of Commitment Expiration by Period - 2027 0
Amount of Commitment Expiration by Period - 2028 0
Amount of Commitment Expiration by Period - 2029 0
Amount of Commitment Expiration by Period - 2030 0
Amount of Commitment Expiration by Period - Thereafter 64
Total Amounts Committed 64
Financial guarantees  
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]  
Amount of Commitment Expiration by Period - 2026 0
Amount of Commitment Expiration by Period - 2027 0
Amount of Commitment Expiration by Period - 2028 0
Amount of Commitment Expiration by Period - 2029 0
Amount of Commitment Expiration by Period - 2030 0
Amount of Commitment Expiration by Period - Thereafter 50
Total Amounts Committed 50
Letters of credit  
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]  
Amount of Commitment Expiration by Period - 2026 0
Amount of Commitment Expiration by Period - 2027 0
Amount of Commitment Expiration by Period - 2028 0
Amount of Commitment Expiration by Period - 2029 0
Amount of Commitment Expiration by Period - 2030 0
Amount of Commitment Expiration by Period - Thereafter 14
Total Amounts Committed $ 14
v3.25.4
Commitments, Contingencies and Off-Balance Sheet Arrangements - Outstanding Letters of Credit, Financial Guarantees and Funding Commitments (Detail)
$ in Millions
Dec. 31, 2025
USD ($)
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]  
Maximum Exposure $ 14
Liability Recorded 11
Credit support under letters of credit (LOC) for deductibles due by us on our own insurance coverages - expires 2028  
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]  
Maximum Exposure 0
Liability Recorded 11
Credit enhancement under letters of credit for our captive insurance operations to meet minimum statutory capital requirements - expires 2028  
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]  
Maximum Exposure 13
Liability Recorded 0
Collateral related to claims funds held in a fiduciary capacity by a recent acquisition - expires 2028  
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]  
Maximum Exposure 1
Liability Recorded $ 0
v3.25.4
Income Taxes - Components of Earnings Before Income Taxes and Provision for Income Taxes (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Earnings before income taxes:      
United States $ 1,211 $ 972 $ 605
Foreign, principally Australia, Canada, New Zealand and the U.K. 660 903 580
Total earnings before income taxes 1,871 1,875 1,185
Federal:      
Current 39 38 (22)
Deferred 94 112 113
Total Provision for income taxes, Federal 133 150 91
State and local:      
Current 42 53 (15)
Deferred (8) (1) 43
Total Provision for income taxes, State and local 34 52 28
Foreign:      
Current 224 194 213
Deferred (23) 8 (113)
Total Provision for income taxes, Foreign 201 202 100
Provision for income taxes $ 368 $ 404 $ 219
v3.25.4
Income Taxes - Reconciliation of Provision for Income Taxes with Federal Statutory Income Tax Rate - After Adoption of ASU 2023-09 (Detail) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Amount      
U.S. federal statutory income tax $ 393 $ 394 $ 249
Tax credits (19) (9) (8)
Non taxable / nondeductible items      
Excess tax benefits on share-based payments (77) (89) (76)
Nondeductible executive compensation (IRC 162(m)) 24    
Other 5    
Cross-border tax laws      
Income (loss) from branches / disregarded entities (57)    
Other 16    
Change in valuation allowance 41 10 4
Domestic state and local income taxes, net of federal benefits * 25 61 50
Earnout liability adjustments 22    
Other foreign jurisdiction 1 (14) (21)
Changes in unrecognized tax benefits 8    
Provision for income taxes $ 368 $ 404 $ 219
% of Pretax Earnings      
U.S. federal statutory income tax 21.00% 21.00% 21.00%
Tax credits (1.00%) (0.50%) (0.70%)
Non taxable / nondeductible items      
Excess tax benefits on share-based payments (4.10%) (4.70%) (6.40%)
Nondeductible executive compensation (IRC 162(m)) 1.30%    
Other 0.30%    
Cross-border tax laws      
Income (loss) from branches / disregarded entities (3.10%)    
Other 0.90%    
Change in valuation allowance 2.20% 0.50% 0.30%
Domestic state and local income taxes, net of federal benefits * 1.30% 3.30% 4.20%
Earnout liability adjustments 1.20%    
Other foreign jurisdiction (3) 0.10% (0.70%) (1.70%)
Changes in unrecognized tax benefits 0.40%    
Provision for income taxes 19.70% 21.60% 18.50%
Foreign tax credit benefits $ 33    
Federal capital loss 40    
United States      
Cross-border tax laws      
Other $ (51)    
Cross-border tax laws      
Other (2.70%)    
United Kingdom      
Cross-border tax laws      
Other $ 37    
Cross-border tax laws      
Other 2.00%    
v3.25.4
Income Taxes - Reconciliation of Provision for Income Taxes with Federal Statutory Income Tax Rate - Before Adoption of ASU 2023-09 (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Amount      
Federal statutory rate $ 393 $ 394 $ 249
State income taxes - net of federal benefit 25 61 50
Differences related to non U.S. operations 1 (14) (21)
Alternative energy and other tax credits (19) (9) (8)
Other permanent differences   43 27
Stock-based compensation (77) (89) (76)
Changes in unrecognized tax benefits   7 12
Change in valuation allowance 41 10 4
Change in tax rates   1 (18)
Provision for income taxes $ 368 $ 404 $ 219
% of Pretax Earnings      
Federal statutory rate 21.00% 21.00% 21.00%
State income taxes - net of federal benefit 1.30% 3.30% 4.20%
Differences related to non U.S. operations 0.10% (0.70%) (1.70%)
Alternative energy and other tax credits (1.00%) (0.50%) (0.70%)
Other permanent differences   2.30% 2.30%
Stock-based compensation (4.10%) (4.70%) (6.40%)
Changes in unrecognized tax benefits   0.40% 1.00%
Change in valuation allowance 2.20% 0.50% 0.30%
Change in tax rates   0.00% (1.50%)
Provision for income taxes 19.70% 21.60% 18.50%
v3.25.4
Income Taxes - Gross Unrecognized Tax Benefit (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Unrecognized Tax Benefits [Roll Forward]    
Gross unrecognized tax benefits at January 1 $ 25 $ 25
Increases in tax positions for current year 5 1
Settlements 0 (3)
Lapse in statute of limitations (1) (5)
Increases in tax positions for prior years 1 17
Decreases in tax positions for prior years 0 (10)
Gross unrecognized tax benefits at December 31 $ 30 $ 25
v3.25.4
Income Taxes - Additional Information (Detail) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Income Tax Expense Benefit [Line Items]    
Net unrecognized tax benefits $ 30 $ 25
Accrued interest and penalties related to unrecognized tax benefits 14 10
Deferred tax liabilities 277  
Deferred tax credits 713 772
Net operating loss carryforwards 270 163
State    
Income Tax Expense Benefit [Line Items]    
Deferred tax credits 40  
General Business and Other Tax Credits    
Income Tax Expense Benefit [Line Items]    
Deferred tax credits 674  
Noncurrent Liabilities [Member]    
Income Tax Expense Benefit [Line Items]    
Deferred tax liabilities $ 319 $ 106
v3.25.4
Income Taxes - Deferred Tax Assets and Liabilities (Detail) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Deferred tax assets:    
Deferred tax credits $ 713 $ 772
Accrued and unfunded compensation and employee benefits 494 356
Amortizable intangible assets 560 177
Compensation expense related to equity plans 113 97
Accrued liabilities 176 126
Depreciable fixed assets 0 22
Net operating loss carryforwards 270 163
Capital loss carryforwards 56 8
Interest expense limitation 174 2
Lease liabilities 166 106
Revenue recognition 0 5
Other 7 3
Total deferred tax assets 2,729 1,837
Valuation allowance for deferred tax assets (264) (177)
Deferred tax assets 2,465 1,660
Deferred tax liabilities:    
Nondeductible amortizable intangible assets 2,372 647
Accrued pension liability 2 9
Depreciable fixed assets 22 0
Right-of-use assets 154 97
Hedging instruments 34 36
Other prepaid items 30 16
Revenue recognition 124 0
Other 4 2
Deferred tax liability 2,742 807
Total deferred tax liabilities $ (277)  
Net deferred tax (liabilities) assets   $ 853
v3.25.4
Supplemental Disclosures of Cash Flow Information - Cash Flow (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Cash and Cash Equivalents [Abstract]      
Interest paid $ 575 $ 347 $ 271
Income taxes paid, net 341 331 226
Income Tax Paid, by Individual Jurisdiction [Line Items]      
Federal     42
Foreign     242
Income taxes paid, net $ 341 $ 331 226
California      
Income Tax Paid, by Individual Jurisdiction [Line Items]      
State     19
Other      
Income Tax Paid, by Individual Jurisdiction [Line Items]      
State     38
United Kingdom      
Income Tax Paid, by Individual Jurisdiction [Line Items]      
Foreign     117
Australia      
Income Tax Paid, by Individual Jurisdiction [Line Items]      
Foreign     31
New Zealand      
Income Tax Paid, by Individual Jurisdiction [Line Items]      
Foreign     26
Total foreign      
Income Tax Paid, by Individual Jurisdiction [Line Items]      
Foreign     $ 68
v3.25.4
Supplemental Disclosures of Cash Flow Information - Additional Information (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]      
Stock issuance $ 1,253 $ 8,344  
Money Market Accounts      
Defined Benefit Plan Disclosure [Line Items]      
Total cash and cash equivalents, restricted cash and fiduciary cash 2,916 15,372  
Stock issuance 13,500    
Senior notes 1,300    
Money Market Accounts | Interest income, premium finance revenues and other income      
Defined Benefit Plan Disclosure [Line Items]      
Increases dividend income 296    
Proceeds from AssuredPartners financing 363    
Dividend income $ 769 $ 473  
Qualified Contributory Savings and Thrift 401(k) Plan      
Defined Benefit Plan Disclosure [Line Items]      
Matching contributions by employer, percentage 100.00%    
Percentage of eligible compensation for matching contributions by employer 5.00% 5.00% 5.00%
Matching contributions vesting schedule 5 years    
Contribution expense to plan $ 115 $ 105 $ 86
Employer match on eligible compensation 5.00% 5.00%  
v3.25.4
Supplemental Disclosures of Cash Flow Information - Cash Equivalents, Restricted Cash and Fiduciary Cash (Detail) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Cash and Cash Equivalents [Abstract]      
Cash and cash equivalents - non-restricted cash $ 1,155 $ 14,759 $ 781
Cash and cash equivalents - restricted cash 241 228 190
Total cash and cash equivalents 1,396 14,987 971
Fiduciary cash 7,142 5,481 5,572
Total cash, cash equivalents, restricted cash and fiduciary cash $ 8,538 $ 20,468 $ 6,543
v3.25.4
Accumulated Other Comprehensive Loss - Schedule of Accumulated Other Comprehensive Loss Attributable to Controlling Interests (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Beginning balance $ 20,180 $ 10,815 $ 9,190
Ending balance 23,347 20,180 10,815
Accumulated Other Comprehensive Loss      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Beginning balance (1,151) (792) (1,140)
Net change in period 626 (359) 348
Ending balance (525) (1,151) (792)
Pension Liability      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Beginning balance (23) (37) (49)
Net change in period 0 14 12
Ending balance (23) (23) (37)
Foreign Currency Translation      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Beginning balance (1,232) (867) (1,125)
Net change in period 630 (365) 258
Ending balance (602) (1,232) (867)
Fair Value of Derivative Instruments      
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]      
Beginning balance 104 112 34
Net change in period (4) (8) 78
Ending balance $ 100 $ 104 $ 112
v3.25.4
Accumulated Other Comprehensive Loss - Additional Information (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Statement of Comprehensive Income [Abstract]      
Income (expense) related to fair value of derivative investments reclassified from accumulated other comprehensive earnings $ (16) $ (7) $ 3
Foreign currency translation reclassified from accumulated other comprehensive earnings $ 0 $ 0 $ 0
v3.25.4
Segment Information - Additional Information (Detail)
12 Months Ended
Dec. 31, 2025
segment
Segment Reporting [Abstract]  
Number of reportable segments 3
v3.25.4
Segment Information - Schedule of Segment Reporting Information by Segment (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Segment Reporting Information [Line Items]      
Revenues before reimbursements $ 13,778 $ 11,401 $ 9,927
Reimbursements 164 154 145
Total revenues 13,942 11,555 10,072
Compensation 7,842 6,522 5,681
Operating 2,258 1,754 1,689
Reimbursements 164 154 145
Interest 639 381 297
Depreciation 206 178 165
Amortization 916 665 532
Change in estimated acquisition earnout payables 46 26 378
Total expenses 12,071 9,680 8,887
Total earnings before income taxes 1,871 1,875 1,185
Provision for income taxes 368 404 219
Net earnings 1,503 1,471 966
Net earnings (loss) attributable to noncontrolling interests 9 8 (4)
Net earnings attributable to controlling interests 1,494 1,463 970
Net foreign exchange gain (loss) (54) 0 (10)
Identifiable assets: 70,665 64,255 51,616
Goodwill - net 22,593 12,270 11,476
Amortizable intangible assets - net 10,684 4,530 4,633
United States      
Segment Reporting Information [Line Items]      
Total revenues 9,391 7,428 6,427
Identifiable assets: 43,239 38,049 25,311
Goodwill - net 16,537 7,041  
United Kingdom      
Segment Reporting Information [Line Items]      
Total revenues 2,477 2,225 1,993
Identifiable assets: 15,604 16,201 16,130
Goodwill - net 3,031 2,617  
Australia      
Segment Reporting Information [Line Items]      
Total revenues 586 575 467
Identifiable assets: 2,379 2,149 2,438
Goodwill - net 829 728  
Canada      
Segment Reporting Information [Line Items]      
Total revenues 395 416 404
Identifiable assets: 1,740 1,690 1,697
Goodwill - net 628 587  
New Zealand      
Segment Reporting Information [Line Items]      
Total revenues 207 210 208
Identifiable assets: 784 733 793
Goodwill - net 233 191  
Other foreign      
Segment Reporting Information [Line Items]      
Total revenues 886 701 573
Identifiable assets: 6,919 5,433 5,247
Goodwill - net 1,335 1,106  
Commissions      
Segment Reporting Information [Line Items]      
Revenues before reimbursements 8,024 6,694 5,865
Fees      
Segment Reporting Information [Line Items]      
Revenues before reimbursements 4,195 3,607 3,145
Supplemental revenues      
Segment Reporting Information [Line Items]      
Revenues before reimbursements 466 359 314
Contingent revenues      
Segment Reporting Information [Line Items]      
Revenues before reimbursements 324 268 235
Interest income, premium finance revenues and other income      
Segment Reporting Information [Line Items]      
Revenues before reimbursements 769 473 368
Brokerage      
Segment Reporting Information [Line Items]      
Goodwill - net 22,078 11,923 11,218
Brokerage | Operating Segments      
Segment Reporting Information [Line Items]      
Revenues before reimbursements 12,192 9,934 8,637
Reimbursements 0 0 0
Total revenues 12,192 9,934 8,637
Compensation 6,660 5,502 4,769
Operating 1,676 1,363 1,272
Reimbursements 0 0 0
Interest 0 0 0
Depreciation 159 133 124
Amortization 894 651 524
Change in estimated acquisition earnout payables 44 26 377
Total expenses 9,433 7,675 7,066
Total earnings before income taxes 2,759 2,259 1,571
Provision for income taxes 707 573 402
Net earnings 2,052 1,686 1,169
Net earnings (loss) attributable to noncontrolling interests 9 8 6
Net earnings attributable to controlling interests 2,043 1,678 1,163
Net foreign exchange gain (loss) (5) 1 0
Identifiable assets: 51,545 46,439 47,446
Goodwill - net 22,078 11,923 11,218
Amortizable intangible assets - net 10,483 4,413 4,428
Brokerage | Operating Segments | United States      
Segment Reporting Information [Line Items]      
Total revenues 8,003 6,104 5,216
Identifiable assets: 25,203 20,910 21,764
Goodwill - net 16,428 6,966  
Brokerage | Operating Segments | United Kingdom      
Segment Reporting Information [Line Items]      
Total revenues 2,372 2,168 1,946
Identifiable assets: 15,161 16,051 16,000
Goodwill - net 2,889 2,591  
Brokerage | Operating Segments | Australia      
Segment Reporting Information [Line Items]      
Total revenues 344 349 312
Identifiable assets: 1,919 1,767 1,969
Goodwill - net 591 509  
Brokerage | Operating Segments | Canada      
Segment Reporting Information [Line Items]      
Total revenues 387 409 398
Identifiable assets: 1,731 1,684 1,693
Goodwill - net 628 587  
Brokerage | Operating Segments | New Zealand      
Segment Reporting Information [Line Items]      
Total revenues 207 203 192
Identifiable assets: 776 719 773
Goodwill - net 225 183  
Brokerage | Operating Segments | Other foreign      
Segment Reporting Information [Line Items]      
Total revenues 879 701 573
Identifiable assets: 6,755 5,308 5,247
Goodwill - net 1,317 1,087  
Brokerage | Commissions | Operating Segments      
Segment Reporting Information [Line Items]      
Revenues before reimbursements 8,024 6,694 5,865
Brokerage | Fees | Operating Segments      
Segment Reporting Information [Line Items]      
Revenues before reimbursements 2,646 2,193 1,885
Brokerage | Supplemental revenues | Operating Segments      
Segment Reporting Information [Line Items]      
Revenues before reimbursements 466 359 314
Brokerage | Contingent revenues | Operating Segments      
Segment Reporting Information [Line Items]      
Revenues before reimbursements 324 268 235
Brokerage | Interest income, premium finance revenues and other income | Operating Segments      
Segment Reporting Information [Line Items]      
Revenues before reimbursements 732 420 338
Risk Management      
Segment Reporting Information [Line Items]      
Goodwill - net 497 328 239
Risk Management | Operating Segments      
Segment Reporting Information [Line Items]      
Revenues before reimbursements 1,585 1,451 1,288
Reimbursements 164 154 145
Total revenues 1,749 1,605 1,433
Compensation 974 882 777
Operating 298 279 257
Reimbursements 164 154 145
Interest 0 0 0
Depreciation 40 38 36
Amortization 22 14 8
Change in estimated acquisition earnout payables 2 0 1
Total expenses 1,500 1,367 1,224
Total earnings before income taxes 249 238 209
Provision for income taxes 66 63 55
Net earnings 183 175 154
Net earnings (loss) attributable to noncontrolling interests 0 0 0
Net earnings attributable to controlling interests 183 175 154
Net foreign exchange gain (loss) (1) 0 (10)
Identifiable assets: 2,274 1,662 1,649
Goodwill - net 497 328 239
Amortizable intangible assets - net 201 117 205
Risk Management | Operating Segments | United States      
Segment Reporting Information [Line Items]      
Total revenues 1,387 1,308 1,209
Identifiable assets: 1,335 1,110 1,026
Goodwill - net 109 75  
Risk Management | Operating Segments | United Kingdom      
Segment Reporting Information [Line Items]      
Total revenues 105 57 47
Identifiable assets: 443 150 130
Goodwill - net 142 26  
Risk Management | Operating Segments | Australia      
Segment Reporting Information [Line Items]      
Total revenues 242 226 155
Identifiable assets: 460 382 469
Goodwill - net 238 219  
Risk Management | Operating Segments | Canada      
Segment Reporting Information [Line Items]      
Total revenues 8 7 6
Identifiable assets: 9 6 4
Goodwill - net 0 0  
Risk Management | Operating Segments | New Zealand      
Segment Reporting Information [Line Items]      
Total revenues 0 7 16
Identifiable assets: 8 14 20
Goodwill - net 8 8  
Risk Management | Operating Segments | Other foreign      
Segment Reporting Information [Line Items]      
Total revenues 7 0 0
Identifiable assets: 19 0 0
Goodwill - net 0 0  
Risk Management | Commissions | Operating Segments      
Segment Reporting Information [Line Items]      
Revenues before reimbursements 0 0 0
Risk Management | Fees | Operating Segments      
Segment Reporting Information [Line Items]      
Revenues before reimbursements 1,549 1,414 1,260
Risk Management | Supplemental revenues | Operating Segments      
Segment Reporting Information [Line Items]      
Revenues before reimbursements 0 0 0
Risk Management | Contingent revenues | Operating Segments      
Segment Reporting Information [Line Items]      
Revenues before reimbursements 0 0 0
Risk Management | Interest income, premium finance revenues and other income | Operating Segments      
Segment Reporting Information [Line Items]      
Revenues before reimbursements 36 37 28
Corporate      
Segment Reporting Information [Line Items]      
Goodwill - net 18 19 19
Corporate | Operating Segments      
Segment Reporting Information [Line Items]      
Revenues before reimbursements 1 16 2
Reimbursements 0 0 0
Total revenues 1 16 2
Compensation 208 138 135
Operating 284 112 160
Reimbursements 0 0 0
Interest 639 381 297
Depreciation 7 7 5
Amortization 0 0 0
Change in estimated acquisition earnout payables 0 0 0
Total expenses 1,138 638 597
Total earnings before income taxes (1,137) (622) (595)
Provision for income taxes (405) (232) (238)
Net earnings (732) (390) (357)
Net earnings (loss) attributable to noncontrolling interests 0 0 (10)
Net earnings attributable to controlling interests (732) (390) (347)
Net foreign exchange gain (loss) (48) (1) 0
Identifiable assets: 16,846 16,154 2,521
Goodwill - net 18 19 19
Amortizable intangible assets - net 0 0 0
Corporate | Operating Segments | United States      
Segment Reporting Information [Line Items]      
Total revenues 1 16 2
Identifiable assets: 16,701 16,029 2,521
Goodwill - net 0 0  
Corporate | Operating Segments | United Kingdom      
Segment Reporting Information [Line Items]      
Total revenues 0 0 0
Identifiable assets: 0 0 0
Goodwill - net 0 0  
Corporate | Operating Segments | Australia      
Segment Reporting Information [Line Items]      
Total revenues 0 0 0
Identifiable assets: 0 0 0
Goodwill - net 0 0  
Corporate | Operating Segments | Canada      
Segment Reporting Information [Line Items]      
Total revenues 0 0 0
Identifiable assets: 0 0 0
Goodwill - net 0 0  
Corporate | Operating Segments | New Zealand      
Segment Reporting Information [Line Items]      
Total revenues 0 0 0
Identifiable assets: 0 0 0
Goodwill - net 0 0  
Corporate | Operating Segments | Other foreign      
Segment Reporting Information [Line Items]      
Total revenues 0 0 0
Identifiable assets: 145 125 0
Goodwill - net 18 19  
Corporate | Commissions | Operating Segments      
Segment Reporting Information [Line Items]      
Revenues before reimbursements 0 0 0
Corporate | Fees | Operating Segments      
Segment Reporting Information [Line Items]      
Revenues before reimbursements 0 0 0
Corporate | Supplemental revenues | Operating Segments      
Segment Reporting Information [Line Items]      
Revenues before reimbursements 0 0 0
Corporate | Contingent revenues | Operating Segments      
Segment Reporting Information [Line Items]      
Revenues before reimbursements 0 0 0
Corporate | Interest income, premium finance revenues and other income | Operating Segments      
Segment Reporting Information [Line Items]      
Revenues before reimbursements $ 1 $ 16 $ 2
v3.25.4
Schedule II - Valuation and Qualifying Accounts (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Allowance for credit losses on trade receivables and accounts receivables      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at Beginning of Year $ 22 $ 23 $ 11
Amounts Recorded in Earnings 15 12 26
Adjustments 12 (13) (14)
Balance at End of Year 49 22 23
Allowance for estimated policy cancellations      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at Beginning of Year 13 10 9
Amounts Recorded in Earnings 6 3 0
Adjustments 4 0 1
Balance at End of Year 23 13 10
Valuation allowance for deferred tax assets      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at Beginning of Year 177 196 135
Amounts Recorded in Earnings 87 (19) 61
Adjustments 0 0 0
Balance at End of Year 264 177 196
Accumulated amortization of expiration lists, non-compete agreements and trade names      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at Beginning of Year 4,472 3,874 3,300
Amounts Recorded in Earnings 916 665 532
Adjustments 181 (67) 42
Balance at End of Year $ 5,569 $ 4,472 $ 3,874