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Other Financial Data (Tables) | 12 Months Ended
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Dec. 31, 2014
Other Financial Data [Abstract] |
Other income (Expense) | Other income consists of the following (in millions):
Years ended December 31 | 2014 |  | 2013 |  | 2012
Equity earnings | $ | 12 |  |  | $ | 20 |  |  | $ | 13 |
Gain on investments | 4 |  |  | 28 |  |  | 7 |
Gain on disposal of business | 24 |  |  | 10 |  |  | 1 |
Foreign currency remeasurement gain (loss) | 18 |  |  | 13 |  |  | (19 | )
Derivative (loss) gain | (19 | ) |  | (10 | ) |  | 3 |
Other | 5 |  |  | 7 |  |  | (3 | )
| $ | 44 |  |  | $ | 68 |  |  | $ | 2 |
Schedule of Allowance for Doubtful Accounts | An analysis of the allowance for doubtful accounts is as follows (in millions):
Years ended December 31, | 2014 |  | 2013 |  | 2012
Balance at beginning of year | $ | 90 |  |  | $ | 118 |  |  | $ | 104 |
Provision charged to operations | 12 |  |  | 9 |  |  | 45 |
Accounts written off, net of recoveries | (33 | ) |  | (38 | ) |  | (30 | )
Effect of exchange rate changes | 5 |  |  | 1 |  |  | (1 | )
Balance at end of year | $ | 74 |  |  | $ | 90 |  |  | $ | 118 |
Schedule of Other Current Assets | The components of Other current assets are as follows (in millions):
As of December 31 | 2014 |  | 2013
Taxes receivable | $ | 311 |  |  | $ | 204 |
Prepaid expenses | 164 |  |  | 229 |
Deferred project costs | 102 |  |  | 98 |
Other | 25 |  |  | 32 |
| $ | 602 |  |  | $ | 563 |
Components of Fixed assets, net | The components of Fixed assets, net are as follows (in millions):
As of December 31 | 2014 |  | 2013
Software | $ | 1,020 |  |  | $ | 997 |
Leasehold improvements | 413 |  |  | 434 |
Computer equipment | 347 |  |  | 341 |
Furniture, fixtures and equipment | 313 |  |  | 323 |
Construction in progress | 94 |  |  | 70 |
Other | 124 |  |  | 124 |
| 2,311 |  |  | 2,289 |
Less: Accumulated depreciation | 1,546 |  |  | 1,498 |
Fixed assets, net | $ | 765 |  |  | $ | 791 |
Schedule of Other Non-current Assets | The components of Other non-current assets are as follows (in millions):
As of December 31 | 2014 |  | 2013
Prepaid pension (1) | $ | 933 |  |  | $ | 567 |
Deferred project costs | 250 |  |  | 273 |
Taxes receivable | 101 |  |  | 108 |
Other | 233 |  |  | 282 |
| $ | 1,517 |  |  | $ | 1,230 |
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(1) | Increase in prepaid pensions is primarily due to actuarial changes and cash contributions made to the U.K. pension plans.
Schedule of Other Current Liabilities | The components of Other current liabilities are as follows (in millions):
As of December 31 | 2014 |  | 2013
Deferred revenue | $ | 408 |  |  | $ | 475 |
Taxes payable | 66 |  |  | 184 |
Other | 314 |  |  | 247 |
| $ | 788 |  |  | $ | 906 |
Schedule of Other Non-current Liabilities | The components of Other non-current liabilities are as follows (in millions):
As of December 31 | 2014 |  | 2013
Taxes payable | $ | 210 |  |  | $ | 184 |
Leases | 184 |  |  | 204 |
Deferred revenue | 167 |  |  | 134 |
Compensation and benefits | 57 |  |  | 105 |
Other | 256 |  |  | 305 |
| $ | 874 |  |  | $ | 932 |

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