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Other Financial Data
 12 Months Ended
Dec. 31, 2024
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
202420232022
Gain from disposals of business$337 $4 $54 
Equity earnings10 5 10 
Foreign currency remeasurement8 (99)(14)
Extinguishment of debt(7)— — 
Pension and other postretirement (1)
(48)(98)(179)
Financial instruments and other (2)
48 25 4 
Total$348 $(163)$(125)
(1)Refer to Note 12 “Employee Benefits” for further information.
(2)For the year ended December 31, 2024, an $84 million gain was recognized 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):
202420232022
Balance at beginning of period$79 $76 $90 
Provision 7 13 8 
Accounts written off, net of recoveries(8)(11)(18)
Foreign currency translation and other(3)1 (4)
Balance at end of period$75 $79 $76 
Other Current Assets
The components of Other current assets are as follows (in millions):
As of December 3120242023
Costs to fulfill contracts with customers (1)
$424 $370 
Prepaid expenses135 100 
Taxes receivable43 35 
Assets held for sale1 354 
Other 156 137 
Total$759 $996 
(1)Refer to Note 3 “Revenue from Contracts with Customers” for further information.
Fixed Assets, net
The components of Fixed assets, net are as follows (in millions):
As of December 3120242023
Software$981 $983 
Leasehold improvements437 430 
Furniture, fixtures, and equipment297 269 
Computer equipment271 294 
Construction in progress133 130 
Other27 30 
Fixed assets, gross
2,146 2,136 
Less: Accumulated depreciation1,509 1,498 
Fixed assets, net
$637 $638 
Depreciation expense, which includes software amortization, was $183 million, $167 million, and $151 million for the years ended December 31, 2024, 2023, and 2022, respectively.
Other Non-Current Assets
The components of Other non-current assets are as follows (in millions):
As of December 3120242023
Costs to obtain contracts with customers (1)
$207 $195 
Taxes receivable90 100 
Investments90 45 
Leases (2)
9 26 
Other602 140 
Total$998 $506 
(1)Refer to Note 3 “Revenue from Contracts with Customers” for further information.
(2) Refer to Note 9 “Lease Commitments” for further information.
Other Current Liabilities
The components of Other current liabilities are as follows (in millions):
As of December 3120242023
Deferred revenue (1)
$280 $270 
Taxes payable260 291 
Leases (2)
191 182 
Contingent consideration93 — 
Liabilities held for sale— 69 
Other949 1,066 
Total$1,773 $1,878 
(1)$805 million and $647 million was recognized in the Consolidated Statements of Income during the years ended December 31, 2024 and December 31, 2023, 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 3120242023
Taxes payable (1)
$885 $827 
Contingent consideration104 — 
Compensation and benefits payable61 59 
Deferred revenue30 33 
Other (2)
64 155 
Total$1,144 $1,074 
(1)There was no non-current transition tax as of December 31, 2024. There was $72 million of non-current transition tax as of December 31, 2023. Refer to Note 10 “Income Taxes” for further information on the transition tax.
(2)Includes $10 million as of December 31, 2023 that was previously classified as “Leases” within Aon’s annual report on Form 10-K filed February 16, 2024. The prior year balance has been reclassified to conform to current year presentation.