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Accumulated Other Comprehensive Income (Details Of The Reclassification From AOCI) (Detail) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2016 | Mar. 31, 2015
Net gains (losses) on financial instruments at fair value and foreign exchange | $ (69) | $ 30
Income (loss) before income taxes | (101) | 113
Provision (benefit) for income taxes | (23) | 44
Net income (loss) | (78) | 69
Amounts reclassified from AOCI [Member] |  |
Net income (loss) | 3 | (4)
Unrealized gains (losses) on AFS, net [Member] | Amounts reclassified from AOCI [Member] |  |
Net gains (losses) on financial instruments at fair value and foreign exchange | 8 | (4)
Net investment income | (3) | (3)
Income (loss) before income taxes | 5 | (7)
Provision (benefit) for income taxes | 2 | (3)
Net income (loss) | 3 | (4)
Foreign currency translation, net [Member] | Amounts reclassified from AOCI [Member] |  |
Net gains (losses) on financial instruments at fair value and foreign exchange | $ 0 | $ 0

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