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Other Financial Data (Tables) | 9 Months Ended
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Sep. 30, 2014
Other Financial Data [Abstract] |
Schedule of Other Income | Other income consists of the following (in millions):
| Three months ended September 30, |  | Nine months ended September 30,
| 2014 |  | 2013 |  | 2014 |  | 2013
Equity earnings | $ | 4 |  |  | $ | 6 |  |  | $ | 10 |  |  | $ | 12 |
Gain on investments | 4 |  |  | 37 |  |  | 2 |  |  | 36 |
Foreign currency remeasurement gain (loss) | 7 |  |  | (4 | ) |  | 11 |  |  | 15 |
Derivative (loss) gain | (6 | ) |  | 1 |  |  | (19 | ) |  | (8 | )
Gain on disposal of business | 25 |  |  | — |  |  | 25 |  |  | — |
Other | 1 |  |  | (1 | ) |  | 5 |  |  | (1 | )
| $ | 35 |  |  | $ | 39 |  |  | $ | 34 |  |  | $ | 54 |
Schedule of Allowance for Doubtful Accounts | An analysis of the allowance for doubtful accounts is as follows (in millions):
| Three months ended September 30, |  | Nine months ended September 30,
| 2014 |  | 2013 |  | 2014 |  | 2013
Balance at beginning of period | $ | 88 |  |  | $ | 114 |  |  | $ | 90 |  |  | $ | 118 |
Provision charged to operations | 1 |  |  | (5 | ) |  | 9 |  |  | 6 |
Accounts written off, net of recoveries | (14 | ) |  | (8 | ) |  | (23 | ) |  | (26 | )
Effect of exchange rate changes and other | 4 |  |  | (2 | ) |  | 3 |  |  | 1 |
Balance at end of period | $ | 79 |  |  | $ | 99 |  |  | $ | 79 |  |  | $ | 99 |
Schedule of Other Current Assets | The components of Other current assets are as follows (in millions):
| September 30, 2014 |  | December 31, 2013
Taxes receivable | 258 |  |  | 111 |
Prepaid expenses | 238 |  |  | 229 |
Deferred project costs | 102 |  |  | 98 |
Deferred tax assets | 81 |  |  | 93 |
Other | 32 |  |  | 32 |
| $ | 711 |  |  | $ | 563 |
Schedule of Other Non-current Assets | The components of Other non-current assets are as follows (in millions):
| September 30, 2014 |  | December 31, 2013
Prepaid pension (1) | $ | 750 |  |  | $ | 567 |
Deferred project costs | 256 |  |  | 273 |
Deferred tax assets | 176 |  |  | 193 |
Taxes receivable | 98 |  |  | 108 |
Other | 251 |  |  | 282 |
| $ | 1,531 |  |  | $ | 1,423 |
______________________________________________
(1) | Increase in prepaid pensions is primarily due to cash funding of the U.K. pension plans.
Schedule of Other Current Liabilities | The components of Other current liabilities are as follows (in millions):
| September 30, 2014 |  | December 31, 2013
Deferred revenue | $ | 440 |  |  | $ | 475 |
Taxes payable | 96 |  |  | 136 |
Deferred tax liabilities | 36 |  |  | 48 |
Other | 281 |  |  | 247 |
| $ | 853 |  |  | $ | 906 |
Schedule of Other Non-current Liabilities | The components of Other non-current liabilities are as follows (in millions):
| September 30, 2014 |  | December 31, 2013
Deferred tax liabilities | $ | 535 |  |  | $ | 420 |
Taxes payable | 202 |  |  | 184 |
Leases | 191 |  |  | 204 |
Deferred revenue | 170 |  |  | 134 |
Compensation and benefits | 56 |  |  | 105 |
Other | 268 |  |  | 305 |
| $ | 1,422 |  |  | $ | 1,352 |

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