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Accumulated Other Comprehensive Income (Details Of The Reclassification From AOCI) (Detail) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Net gains (losses) on financial instruments at fair value and foreign exchange | $ (26) | $ 22 | $ (4) | $ 13
Income (loss) before income taxes | (207) | (146) | (226) | (242)
Net income (loss) | (170) | (146) | (187) | (244)
Amounts reclassified from AOCI [Member] |  |  |  |
Net income (loss) | (44) | 0 | (37) | 0
Unrealized gains (losses) on AFS, net [Member] | Amounts reclassified from AOCI [Member] |  |  |  |
Net gains (losses) on financial instruments at fair value and foreign exchange | (16) | 0 | 23 | 1
Net investment losses related to OTTI | (9) | 0 | (37) | (1)
Income (loss) before income taxes | (25) | 0 | (14) | 0
Instrument-specific credit risk of liabilities measured at fair value, net [Member] | Amounts reclassified from AOCI [Member] |  |  |  |
Net gains (losses) on financial instruments at fair value and foreign exchange | $ (19) | $ 0 | $ (23) | $ 0

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