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Other Financial Data (Tables) | 6 Months Ended
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Jun. 30, 2014
Other Financial Data [Abstract] |
Schedule of Other Income | Other (expense) income consists of the following (in millions):
| Three months ended June 30, |  | Six months ended June 30,
| 2014 |  | 2013 |  | 2014 |  | 2013
Equity earnings | $ | 1 |  |  | $ | 4 |  |  | $ | 6 |  |  | $ | 6 |
Loss on investments | (1 | ) |  | (2 | ) |  | (2 | ) |  | (1 | )
Foreign currency remeasurement (loss) gain | (15 | ) |  | (5 | ) |  | 4 |  |  | 19 |
Derivative gain (loss) | 10 |  |  | 9 |  |  | (13 | ) |  | (9 | )
Other | 3 |  |  | — |  |  | 4 |  |  | — |
| $ | (2 | ) |  | $ | 6 |  |  | $ | (1 | ) |  | $ | 15 |
Schedule of Allowance for Doubtful Accounts | An analysis of the allowance for doubtful accounts is as follows (in millions):
| Three months ended June 30, |  | Six months ended June 30,
| 2014 |  | 2013 |  | 2014 |  | 2013
Balance at beginning of period | $ | 89 |  |  | $ | 122 |  |  | $ | 90 |  |  | $ | 118 |
Provision charged to operations | 4 |  |  | 1 |  |  | 8 |  |  | 11 |
Accounts written off, net of recoveries | (4 | ) |  | (9 | ) |  | (9 | ) |  | (18 | )
Effect of exchange rate changes and other | (1 | ) |  | — |  |  | (1 | ) |  | 3 |
Balance at end of period | $ | 88 |  |  | $ | 114 |  |  | $ | 88 |  |  | $ | 114 |
Schedule of Other Current Assets | The components of Other current assets are as follows (in millions):
| June 30, 2014 |  | Dec 31, 2013
Deposit with trustee (1) | $ | 723 |  |  | $ | — |
Prepaid expenses | 237 |  |  | 229 |
Taxes receivable | 213 |  |  | 111 |
Deferred project costs | 99 |  |  | 98 |
Deferred tax assets | 81 |  |  | 93 |
Other | 43 |  |  | 32 |
| $ | 1,396 |  |  | $ | 563 |
______________________________________________
(1) | Deposit with trustee relates to the 6.25% €500 million debt securities due July 2014 and the related accrued interest, which is described further in Note 9 "Debt." The principal amount included in this balance is $681 million and the accrued interest amount is $42 million.
Schedule of Other Non-current Assets | The components of Other non-current assets are as follows (in millions):
| June 30, 2014 |  | Dec 31, 2013
Prepaid pension (1) | $ | 746 |  |  | $ | 567 |
Deferred project costs | 262 |  |  | 273 |
Deferred tax assets | 188 |  |  | 193 |
Taxes receivable | 99 |  |  | 108 |
Other | 278 |  |  | 282 |
| $ | 1,573 |  |  | $ | 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):
| June 30, 2014 |  | Dec 31, 2013
Deferred revenue | $ | 482 |  |  | $ | 475 |
Taxes payable | 115 |  |  | 136 |
Deferred tax liabilities | 53 |  |  | 48 |
Other | 307 |  |  | 247 |
| $ | 957 |  |  | $ | 906 |
Schedule of Other Non-current Liabilities | The components of Other non-current liabilities are as follows (in millions):
| June 30, 2014 |  | Dec 31, 2013
Deferred tax liabilities | $ | 392 |  |  | $ | 420 |
Taxes payable | 194 |  |  | 184 |
Leases | 191 |  |  | 204 |
Deferred revenue | 159 |  |  | 134 |
Compensation and benefits | 60 |  |  | 105 |
Other | 293 |  |  | 305 |
| $ | 1,289 |  |  | $ | 1,352 |

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