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Income Taxes (Narrative) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Operating Loss Carryforwards [Line Items] |  |  |
Deferred Tax Assets, Valuation Allowance | $ 542 | $ 538 |
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued | 13 |  |
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense |  | 1 | $ (1)
Amounts due to former parent | 19 | 56 |
Deferred Tax Liability Not Recognized, Amount of Unrecognized Deferred Tax Liability, Undistributed Earnings of Foreign Subsidiaries | 320 |  |
Due to former parent upon receipt from IRS |  | 19 |
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount | 4 | $ 455 |
Unrecognized Tax Benefits that Would Impact Effective Tax Rate | 243 |  |
Decrease in Unrecognized Tax Benefits is Reasonably Possible | 5 |  |
Undistributed Earnings of Foreign Subsidiaries | 1,100 |  |
Maximum [Member] |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense | $ 1 |  |

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