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Income Taxes - Components of the Provision (Benefit) for Income Taxes (Detail) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
U.S. Federal: |  |  |  |  |  |  |  |  |  |  |
Current |  |  |  |  |  |  |  |  | $ (14) | $ 38 | $ 48
Deferred |  |  |  |  |  |  |  |  | (2) | 3 | 6
U.S. Federal, Total |  |  |  |  |  |  |  |  | (16) | 41 | 54
U.S. State: |  |  |  |  |  |  |  |  |  |  |
Current |  |  |  |  |  |  |  |  | (1) | 4 | 4
U.S. State, Total |  |  |  |  |  |  |  |  | (1) | 4 | 4
Foreign |  |  |  |  |  |  |  |  |  |  |
Current |  |  |  |  |  |  |  |  | 5 | 18 | 20
Deferred |  |  |  |  |  |  |  |  | (4) | (1) | (3)
Foreign, Total |  |  |  |  |  |  |  |  | 1 | 17 | 17
Income tax provision (benefit) | $ 63 | $ (67) | $ (10) | $ (2) | $ 8 | $ 17 | $ 16 | $ 21 | $ (16) | $ 62 | $ 75

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