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Changes in Accumulated Other Comprehensive Income (Details 1) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Other non-interest revenue | $ 1,732 | $ 2,029 | $ 2,033
Other expense | (5,776) | (5,162) | $ (6,793)
Increase (decrease) due to amounts reclassified into earnings | 7 | 2 |
Net Unrealized Investment Gains (Losses) on Investment Securities [Member] |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Other non-interest revenue | 0 | 9 |
Income tax provision for other non-interest revenue | 0 | (3) |
Other non-interest revenue, net of taxes | 0 | 6 |
Foreign Currency Translation Adjustments [Member] |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Other expense | (7) | (4) |
Income tax benefit for other, net expense | 14 | 0 |
Other, net expense, net of taxes | $ 7 | $ (4) |

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