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Business Segment Information - Reconciliation of Revenue and Net Income (Details) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | |||||||||||
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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| Segment Reporting Information [Line Items] | ||||||||||||
| Segments' total revenue, net of interest expense (FTE basis) | $ 89,801 | [1] | $ 84,235 | [1] | $ 94,426 | [1] | ||||||
| Revenues | 88,942 | [2] | 83,334 | [2] | 93,454 | [2] | ||||||
| Reclassification to net income | 11,431 | [1] | 4,188 | [1] | 1,446 | [1] | ||||||
| Year-end total assets | 2,102,273 | [1] | 2,209,974 | [1] | ||||||||
| Liabilities, Fair Value Adjustment | (649) | (5,100) | 3,300 | |||||||||
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Operating Segments [Member]
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| Segment Reporting Information [Line Items] | ||||||||||||
| Segments' total revenue, net of interest expense (FTE basis) | 87,912 | 85,017 | 78,384 | |||||||||
| Reclassification to net income | 10,944 | 7,925 | (3,115) | |||||||||
| Year-end total assets | 1,935,392 | 1,947,174 | ||||||||||
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Asset And Liability Management Activities [Member]
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| Segment Reporting Information [Line Items] | ||||||||||||
| Revenues | (986) | [3] | (2,412) | [3] | 7,576 | [3] | ||||||
| Reclassification to net income | (1,207) | (4,087) | 513 | |||||||||
| Year-end total assets | 664,302 | 655,915 | ||||||||||
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Equity Investment Income [Member]
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| Segment Reporting Information [Line Items] | ||||||||||||
| Revenues | 2,610 | 1,135 | 7,105 | |||||||||
| Reclassification to net income | 1,644 | 715 | 4,476 | |||||||||
| Year-end total assets | 2,411 | 5,508 | ||||||||||
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Liquidating Businesses and Other [Member]
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| Segment Reporting Information [Line Items] | ||||||||||||
| Revenues | 265 | 495 | 1,361 | |||||||||
| Reclassification to net income | 50 | (365) | (26) | |||||||||
| Year-end total assets | 70,435 | 138,974 | ||||||||||
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Fully Taxable Equivalent Basis Adjustment [Member]
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| Segment Reporting Information [Line Items] | ||||||||||||
| Revenues | (859) | (901) | (972) | |||||||||
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Merger and restructuring charges [Member]
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| Segment Reporting Information [Line Items] | ||||||||||||
| Reclassification to net income | $ (402) | |||||||||||
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