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Consolidated Statements Of Comprehensive Income (Loss) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017
Statements of Comprehensive Income (Loss) |  |  |  |
Net income (loss) | $ (146) | $ (1,229) | $ (244) | $ (1,301)
Unrealized gains (losses) on available-for-sale securities: [Abstract] |  |  |  |
Unrealized gains (losses) arising during the period | (14) | 44 | (57) | 4
Provision (benefit) for income taxes | 0 | 6 | 5 | 0
Total | (14) | 38 | (62) | 4
Reclassification adjustments for (gains) losses included in net income (loss) | 0 | (3) | (1) | (5)
Provision (benefit) for income taxes | 0 | 1 | 0 | 0
Total | 0 | (4) | (1) | (5)
Available-for-sale securities with other-than-temporary impairments: [Abstract] |  |  |  |
Other-than-temporary impairments and unrealized gains (losses) arising during the period | 17 | (47) | 23 | (34)
Provision (benefit) for income taxes | 0 | (5) | 0 | 0
Total | 17 | (42) | 23 | (34)
Reclassification adjustments for (gains) losses included in net income (loss) | 0 | 0 | 1 | 2
Provision (benefit) for income taxes | 0 | 0 | 0 | 1
Total | 0 | 0 | 1 | 1
Foreign currency translation: [Abstract] |  |  |  |
Foreign currency translation gains (losses) | 1 | 0 | 2 | 144
Provision (benefit) for income taxes | 0 | 0 | 0 | 21
Total | 1 | 0 | 2 | 123
Instrument-specific credit risk of liabilities measured at fair value: [Abstract] |  |  |  |
Net gains (losses) of financial instruments at fair value | (18) | 0 | (32) | 0
Provision (benefit) for income taxes | 0 | 0 | 0 | 0
Total | (18) | 0 | (32) | 0
Total other comprehensive income (loss) | (14) | (8) | (69) | 89
Comprehensive income (loss) | $ (160) | $ (1,237) | $ (313) | $ (1,212)

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