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Consolidated Statements Of Comprehensive Income (Loss) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2018 | Mar. 31, 2017
Statements of Comprehensive Income (Loss) |  |
Net income (loss) | $ (98) | $ (72)
Unrealized gains (losses) on available-for-sale securities: [Abstract] |  |
Unrealized gains (losses) arising during the period | (43) | (40)
Provision (benefit) for income taxes | 5 | (6)
Total | (48) | (34)
Reclassification adjustments for (gains) losses included in net income (loss) | (1) | (2)
Provision (benefit) for income taxes | 0 | (1)
Total | (1) | (1)
Available-for-sale securities with other-than-temporary impairments: [Abstract] |  |
Other-than-temporary impairments and unrealized gains (losses) arising during the period | 6 | 13
Provision (benefit) for income taxes | 0 | 5
Total | 6 | 8
Reclassification adjustments for (gains) losses included in net income (loss) | 1 | 2
Provision (benefit) for income taxes | 0 | 1
Total | 1 | 1
Foreign currency translation: [Abstract] |  |
Foreign currency translation gains (losses) | 1 | 144
Provision (benefit) for income taxes | 0 | 21
Total | 1 | 123
Instrument-specific credit risk of liabilities measured at fair value: [Abstract] |  |
Unrealized gains (losses) arising during the period | (14) | 0
Total other comprehensive income (loss) | (55) | 97
Comprehensive income (loss) | $ (153) | $ 25

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