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Changes in Accumulated Other Comprehensive Income (Details 1) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Other non-interest revenue | $ 2,033 | $ 2,989 | $ 2,274
Interest Expense, Long-term Debt | 1,148 | 1,334 | 1,516
Other expense | (6,793) | (6,089) | $ (6,796)
Net Unrealized Investment Gains (Losses) on Investment Securities [Member] |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Other non-interest revenue | 1 | 111 |
Income tax provision for other non-interest revenue | 0 | (40) |
Increase (decrease) due to amounts reclassified into earnings | 1 | 71 |
Foreign Currency Translation Adjustments [Member] |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Other expense | 1 | (9) |
Income tax benefit for other, net expense | 0 | 4 |
Increase (decrease) due to amounts reclassified into earnings | 1 | (5) |
Accumulated Other Comprehensive Income (Loss) [Member] |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Increase (decrease) due to amounts reclassified into earnings | $ 2 | $ 66 |

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