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Other Financial Data
 12 Months Ended
Dec. 31, 2025
Other Financial Data [Abstract]  
Other Financial Data Other Financial Data
Consolidated Statements of Income Information
Other Income (Expense)
The components of Other income (expense) are as follows (in millions):
Years Ended December 31
202520242023
Gain from disposals of business (1)
$1,201 $337 $4 
Equity earnings10 10 5 
Foreign currency remeasurement(52)8 (99)
Extinguishment of debt— (7)— 
Pension and other postretirement (2)
(87)(48)(98)
Financial instruments and other (3)
139 48 25 
Total$1,211 $348 $(163)
(1)The gain from the disposal of the NFP Wealth business for the year ended December 31, 2025 was $1,199 million.
(2)Refer to Note 12 “Employee Benefits” for further information.
(3)For the years ended December 31, 2025 and 2024, a $108 million and $84 million gain was recognized, respectively, related to deferred consideration from the affiliates of The Blackstone Group L.P. and the other designated purchasers related to a divestiture completed in a prior year period. Refer to Note 6 “Acquisitions and Dispositions of Businesses” for additional information.
Consolidated Statements of Financial Position Information
Allowance for Doubtful Accounts
Changes in the net carrying amount of allowance for doubtful accounts are as follows (in millions):
202520242023
Balance at beginning of period$75 $79 $76 
Provision 10 7 13 
Accounts written off, net of recoveries(15)(8)(11)
Foreign currency translation and other4 (3)1 
Balance at end of period$74 $75 $79 
Other Current Assets
The components of Other current assets are as follows (in millions):
As of December 3120252024
Costs to fulfill contracts with customers (1)
$450 $424 
Prepaid expenses136 135 
Taxes receivable102 43 
Other (2)
190 157 
Total$878 $759 
(1)Refer to Note 3 “Revenue from Contracts with Customers” for further information.
(2)Includes $1 million as of December 31, 2024 that was previously classified as “Assets held for sale” within Aon’s Annual Report on Form 10-K filed February 18, 2025. The prior year balance has been reclassified to conform to current year presentation.
Fixed Assets, net
The components of Fixed assets, net are as follows (in millions):
As of December 3120252024
Software$1,013 $981 
Leasehold improvements491 437 
Furniture, fixtures, and equipment271 297 
Computer equipment327 271 
Construction in progress199 133 
Other46 27 
Fixed assets, gross
2,347 2,146 
Less: Accumulated depreciation1,645 1,509 
Fixed assets, net
$702 $637 
Depreciation expense, which includes software amortization, was $188 million, $183 million, and $167 million for the years ended December 31, 2025, 2024, and 2023, respectively.
Other Non-Current Assets
The components of Other non-current assets are as follows (in millions):
As of December 3120252024
Costs to obtain contracts with customers (1)
$208 $207 
Taxes receivable82 90 
Investments192 90 
Other (2)(3)
274 611 
Total$756 $998 
(1)Refer to Note 3 “Revenue from Contracts with Customers” for further information.
(2)Includes $9 million as of December 31, 2024 that was previously classified as “Leases” within Aon’s Annual Report on Form 10-K filed February 18, 2025. The prior year balance has been reclassified to conform to current year presentation.
(3)As of December 31, 2024, includes $416 million of consideration paid into an escrow account related to the acquisition of Griffiths & Armour, which closed on January 1, 2025. Refer to Note 6 “Acquisitions and Dispositions of Businesses” for additional information.
Other Current Liabilities
The components of Other current liabilities are as follows (in millions):
As of December 3120252024
Deferred revenue (1)
$259 $280 
Taxes payable309 260 
Leases (2)
181 191 
Contingent consideration28 93 
Other1,110 949 
Total$1,887 $1,773 
(1)$746 million and $805 million was recognized in the Consolidated Statements of Income during the years ended December 31, 2025 and December 31, 2024, respectively.
(2)Refer to Note 9 “Lease Commitments” for further information.
Other Non-Current Liabilities
The components of Other non-current liabilities are as follows (in millions):
As of December 3120252024
Taxes payable$1,014 $885 
Contingent consideration99 104 
Compensation and benefits payable60 61 
Deferred revenue30 30 
Other82 64 
Total$1,285 $1,144