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Other Financial Data (Tables) | 3 Months Ended
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Mar. 31, 2019
Other Financial Data [Abstract] |
Schedule of Other Income (Expense) | Other income (expense) consists of the following (in millions):
| Three Months Ended March 31
| 2019 |  | 2018
Foreign currency remeasurement | $ | (11 | ) |  | $ | (16 | )
Disposal of business | 5 |  |  | (1 | )
Pension and other postretirement | 4 |  |  | 2 |
Equity earnings | 1 |  |  | 1 |
Financial instruments | 1 |  |  | — |
Other | — |  |  | (1 | )
Total | $ | — |  |  | $ | (15 | )
Schedule of Allowance for Doubtful Accounts | An analysis of the allowance for doubtful accounts are as follows (in millions):
| Three Months Ended March 31
| 2019 |  | 2018
Balance at beginning of period | $ | 64 |  |  | $ | 59 |
Provision charged to Other general expenses | 8 |  |  | 8 |
Accounts written off, net of recoveries | (8 | ) |  | (3 | )
Foreign currency translation and other | — |  |  | 1 |
Balance at end of period | $ | 64 |  |  | $ | 65 |
Schedule of Other Current Assets | The components of Other current assets are as follows (in millions):
As of | March 31, 2019 |  | December 31, 2018
Costs to fulfill contracts with customers (1) | $ | 236 |  |  | $ | 329 |
Prepaid expenses | 108 |  |  | 97 |
Taxes receivable | 81 |  |  | 113 |
Other (2) | 106 |  |  | 79 |
Total | $ | 531 |  |  | $ | 618 |
(1) | Refer to Note 3 “Revenue from Contracts with Customers” for further information.
(2) December 31, 2018 includes $12 million previously classified as “Receivables from the Divested Business
Schedule of Other Non-current Assets | The components of Other non-current assets are as follows (in millions):
As of | March 31, 2019 |  | December 31, 2018
Costs to obtain contracts with customers (1) | $ | 155 |  |  | $ | 156 |
Taxes receivable | 99 |  |  | 100 |
Leases (2) | 70 |  |  | — |
Investments | 55 |  |  | 54 |
Other | 130 |  |  | 138 |
Total | $ | 509 |  |  | $ | 448 |
(1) | Refer to Note 3 “Revenue from Contracts with Customers” for further information.
(2) Refer to Note 20 “Lease Commitments” for further information.
Schedule of Other Current Liabilities | The components of Other current liabilities are as follows (in millions):
As of | March 31, 2019 |  | December 31, 2018
Deferred revenue (1) | $ | 305 |  |  | $ | 251 |
Leases (2) | 241 |  |  | — |
Taxes payable | 158 |  |  | 83 |
Other | 516 |  |  | 602 |
Total | $ | 1,220 |  |  | $ | 936 |
(1) | During the Three Months Ended March 31, 2019, and twelve months ended December 31, 2018, $134 million and $487 million, respectively, was recognized in the Condensed Consolidated Statement of Income.
(2) | Refer to Note 20 “Lease Commitments” for further information.
Schedule of Other Non-current Liabilities | The components of Other non-current liabilities are as follows (in millions):
As of | March 31, 2019 |  | December 31, 2018
Taxes payable (1) | $ | 596 |  |  | $ | 585 |
Leases | 50 |  |  | 169 |
Deferred revenue | 60 |  |  | 65 |
Compensation and benefits | 44 |  |  | 56 |
Other | 223 |  |  | 222 |
Total | $ | 973 |  |  | $ | 1,097 |
(1) Includes $238 million and $240 million for the non-current portion of the Transition Tax as of March 31, 2019 and December 31, 2018, respectively.

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