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Other Financial Data | 12 Months Ended
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Dec. 31, 2022
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
| 2022 |  | 2021 |  | 2020
Pension and other postretirement (1) | $ | (179) |  |  | $ | 21 |  |  | $ | 13 |
Foreign currency remeasurement | (14) |  |  | 26 |  |  | (12) |
Extinguishment of debt | — |  |  | — |  |  | (7) |
Financial instruments and other | 4 |  |  | (45) |  |  | (10) |
Equity earnings | 10 |  |  | 8 |  |  | 4 |
Gain from disposals of business | 54 |  |  | 142 |  |  | 25 |
Total | $ | (125) |  |  | $ | 152 |  |  | $ | 13 |
(1) Refer to Note 11 “Employee Benefits” for further 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):
| 2022 |  | 2021 |  | 2020
Balance at beginning of period | $ | 90 |  |  | $ | 98 |  |  | $ | 77 |
Provision | 8 |  |  | 26 |  |  | 29 |
Accounts written off, net of recoveries | (18) |  |  | (37) |  |  | (6) |
Foreign currency translation and other | (4) |  |  | 3 |  |  | (2) |
Balance at end of period | $ | 76 |  |  | $ | 90 |  |  | $ | 98 |
Other Current Assets The components of Other current assets are as follows (in millions):
As of December 31 | 2022 |  | 2021
Costs to fulfill contracts with customers (1) | $ | 355 |  |  | $ | 361 |
Prepaid expenses | 109 |  |  | 137 |
Taxes receivable | 74 |  |  | 53 |
Other | 108 |  |  | 165 |
Total | $ | 646 |  |  | $ | 716 |
(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 31 | 2022 |  | 2021
Software | $ | 861 |  |  | $ | 797 |
Leasehold improvements | 409 |  |  | 425 |
Computer equipment | 269 |  |  | 268 |
Furniture, fixtures, and equipment | 267 |  |  | 279 |
Construction in progress | 109 |  |  | 45 |
Other | 34 |  |  | 33 |
Fixed assets, gross | 1,949 |  |  | 1,847 |
Less: Accumulated depreciation | 1,391 |  |  | 1,318 |
Fixed assets, net | $ | 558 |  |  | $ | 529 |
Depreciation expense, which includes software amortization, was $151 million, $179 million, and $167 million for the years ended December 31, 2022, 2021, and 2020, respectively. Other Non-current Assets The components of Other non-current assets are as follows (in millions):
As of December 31 | 2022 |  | 2021
Costs to obtain contracts with customers (1) | $ | 185 |  |  | $ | 179 |
Taxes receivable | 109 |  |  | 95 |
Investments | 60 |  |  | 64 |
Leases (2) | 43 |  |  | 63 |
Other | 112 |  |  | 111 |
Total | $ | 509 |  |  | $ | 512 |
(1) Refer to Note 3 “Revenue from Contracts with Customers” for further information. (2) Refer to Note 8 “Lease Commitments” for further information. Other Current Liabilities The components of Other current liabilities are as follows (in millions):
As of December 31 | 2022 |  | 2021
Deferred revenue (1) | $ | 250 |  |  | $ | 321 |
Taxes payable | 193 |  |  | 149 |
Leases (2) | 186 |  |  | 213 |
Other | 718 |  |  | 648 |
Total | $ | 1,347 |  |  | $ | 1,331 |
(1)$653 million and $553 million was recognized in the Consolidated Statements of Income during the years ended December 31, 2022 and December 31, 2021, respectively. (2)Refer to Note 8 “Lease Commitments” for further information. Other Non-current Liabilities The components of Other non-current liabilities are as follows (in millions):
As of December 31 | 2022 |  | 2021
Taxes payable (1) | $ | 795 |  |  | $ | 609 |
Compensation and benefits | 69 |  |  | 58 |
Deferred revenue | 37 |  |  | 70 |
Leases (2) | 28 |  |  | 46 |
Other | 95 |  |  | 127 |
Total | $ | 1,024 |  |  | $ | 910 |
(1)Includes $129 million and $145 million for the non-current portion of the transition tax as of December 31, 2022 and December 31, 2021, respectively. Refer to Note 9 “Income Taxes” for further information on the transition tax. (2)Refer to Note 8 “Lease Commitments” for further information.

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