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Other Financial Data (Tables) | 12 Months Ended
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Dec. 31, 2018
Other Financial Data [Abstract] |
Other income (Expense) | Other income (expense) consists of the following (in millions):
| Years ended December 31
| 2018 |  | 2017 |  | 2016
Foreign currency remeasurement | $ | 25 |  |  | $ | (37 | ) |  | $ | (2 | )
Disposal of business | (6 | ) |  | (16 | ) |  | 39 |
Pension and other postretirement | 1 |  |  | (86 | ) |  | (173 | )
Equity earnings | 4 |  |  | 12 |  |  | 13 |
Financial instruments | (49 | ) |  | 2 |  |  | (14 | )
Total | $ | (25 | ) |  | $ | (125 | ) |  | $ | (137 | )
Schedule of Allowance for Doubtful Accounts | An analysis of the allowance for doubtful accounts is as follows (in millions):
| 2018 |  | 2017 |  | 2016
Balance at January 1 | $ | 59 |  |  | $ | 56 |  |  | $ | 58 |
Provision charged to Other general expenses | 24 |  |  | 18 |  |  | 10 |
Accounts written off, net of recoveries | (25 | ) |  | (18 | ) |  | (15 | )
Foreign currency translation | 4 |  |  | 3 |  |  | 3 |
Balance at December 31 | $ | 62 |  |  | $ | 59 |  |  | $ | 56 |
Schedule of Other Current Assets | The components of Other current assets are as follows (in millions):
As of December 31 | 2018 |  | 2017
Costs to fulfill contracts with customers (1) | $ | 329 |  |  | $ | — |
Taxes receivable | 113 |  |  | 114 |
Prepaid expenses | 97 |  |  | 126 |
Receivables from the Divested Business (2) | 12 |  |  | 28 |
Other | 67 |  |  | 21 |
Total | $ | 618 |  |  | $ | 289 |
(1) | Refer to Note 3 “Revenue from Contracts with Customers” for further information.
(2) | Refer to Note 5 “Discontinued Operations” for further information.
Components of Fixed assets, net | The components of Fixed assets, net are as follows (in millions):
As of December 31 | 2018 |  | 2017
Software | $ | 693 |  |  | $ | 680 |
Leasehold improvements | 334 |  |  | 349 |
Computer equipment | 279 |  |  | 295 |
Furniture, fixtures and equipment | 228 |  |  | 240 |
Construction in progress | 154 |  |  | 79 |
Other | 45 |  |  | 90 |
Fixed assets, gross | 1,733 |  |  | 1,733 |
Less: Accumulated depreciation | 1,145 |  |  | 1,169 |
Fixed assets, net | $ | 588 |  |  | $ | 564 |
Schedule of Other Non-current Assets | The components of Other non-current assets are as follows (in millions):
As of December 31 | 2018 |  | 2017
Costs to obtain contracts with customers (1) | $ | 156 |  |  | $ | — |
Investments | 54 |  |  | 57 |
Taxes receivable | 100 |  |  | 84 |
Other | 138 |  |  | 166 |
Total | $ | 448 |  |  | $ | 307 |
(1) Refer to Note 3 “Revenue from Contracts with Customers” for further information.
Schedule of Other Current Liabilities | The components of Other current liabilities are as follows (in millions):
As of December 31 | 2018 |  | 2017
Deferred revenue (1) | $ | 251 |  |  | $ | 311 |
Taxes payable (2) | 83 |  |  | 139 |
Other | 602 |  |  | 420 |
Total | $ | 936 |  |  | $ | 870 |
(1) | During the twelve months ended December 31, 2018, $487 million was recognized in the Consolidated Statements of Income.
(2) | Includes $42 million for the current portion of the Transition Tax as of December 31, 2017. Refer to Note 11 “Income Taxes” for further information on the Transition Tax.
Schedule of Other Non-current Liabilities | The components of Other non-current liabilities are as follows (in millions):
As of December 31 | 2018 |  | 2017
Taxes payable (1) | $ | 585 |  |  | $ | 529 |
Leases | 169 |  |  | 153 |
Compensation and benefits | 56 |  |  | 67 |
Deferred revenue | 65 |  |  | 49 |
Other | 222 |  |  | 304 |
Total | $ | 1,097 |  |  | $ | 1,102 |
(1) | Includes $240 million and $222 million for the non-current portion of the Transition Tax, as of December 31, 2018 and December 31, 2017, respectively. Refer to Note 11 “Income Taxes” for further information on the Transition Tax.

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