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Derivatives - Sales and Trading Revenue (Details) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 9 Months Ended | ||||||||
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Sep. 30, 2013
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Sep. 30, 2012
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Sep. 30, 2013
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Sep. 30, 2012
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| Derivatives, Fair Value [Line Items] | ||||||||||
| Brokerage Commissions Revenue | $ 480 | $ 428 | $ 1,600 | $ 1,400 | ||||||
| Sales and Trading Revenue [Abstract] | ||||||||||
| Trading Activity, Gains and Losses, Net | 2,668 | 2,611 | 10,164 | 9,437 | ||||||
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Trading Account Profits [Member]
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| Sales and Trading Revenue [Abstract] | ||||||||||
| Trading Activity, Gains and Losses, Net | 1,201 | 1,237 | 5,939 | 4,981 | ||||||
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Net Interest Income [Member]
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| Sales and Trading Revenue [Abstract] | ||||||||||
| Trading Activity, Gains and Losses, Net | 853 | 790 | 2,714 | 2,131 | ||||||
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Other Income (Loss) [Member]
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| Sales and Trading Revenue [Abstract] | ||||||||||
| Trading Activity, Gains and Losses, Net | 614 | [1] | 584 | [1] | 1,511 | [1] | 2,325 | [1] | ||
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Interest rate risk [Member]
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| Sales and Trading Revenue [Abstract] | ||||||||||
| Trading Activity, Gains and Losses, Net | 456 | 331 | 2,073 | 1,253 | ||||||
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Interest rate risk [Member] | Trading Account Profits [Member]
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| Sales and Trading Revenue [Abstract] | ||||||||||
| Trading Activity, Gains and Losses, Net | 188 | 68 | 1,207 | 522 | ||||||
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Interest rate risk [Member] | Net Interest Income [Member]
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| Sales and Trading Revenue [Abstract] | ||||||||||
| Trading Activity, Gains and Losses, Net | 237 | 267 | 800 | 752 | ||||||
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Interest rate risk [Member] | Other Income (Loss) [Member]
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| Sales and Trading Revenue [Abstract] | ||||||||||
| Trading Activity, Gains and Losses, Net | 31 | [1] | (4) | [1] | 66 | [1] | (21) | [1] | ||
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Foreign exchange risk [Member]
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| Sales and Trading Revenue [Abstract] | ||||||||||
| Trading Activity, Gains and Losses, Net | 211 | 207 | 872 | 676 | ||||||
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Foreign exchange risk [Member] | Trading Account Profits [Member]
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| Sales and Trading Revenue [Abstract] | ||||||||||
| Trading Activity, Gains and Losses, Net | 215 | 193 | 890 | 659 | ||||||
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Foreign exchange risk [Member] | Net Interest Income [Member]
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| Sales and Trading Revenue [Abstract] | ||||||||||
| Trading Activity, Gains and Losses, Net | 2 | 1 | 3 | 5 | ||||||
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Foreign exchange risk [Member] | Other Income (Loss) [Member]
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| Sales and Trading Revenue [Abstract] | ||||||||||
| Trading Activity, Gains and Losses, Net | (6) | [1] | 13 | [1] | (21) | [1] | 12 | [1] | ||
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Equity risk [Member]
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| Sales and Trading Revenue [Abstract] | ||||||||||
| Trading Activity, Gains and Losses, Net | 945 | 667 | 3,303 | 2,340 | ||||||
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Equity risk [Member] | Trading Account Profits [Member]
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| Sales and Trading Revenue [Abstract] | ||||||||||
| Trading Activity, Gains and Losses, Net | 392 | 195 | 1,663 | 988 | ||||||
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Equity risk [Member] | Net Interest Income [Member]
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| Sales and Trading Revenue [Abstract] | ||||||||||
| Trading Activity, Gains and Losses, Net | 48 | 15 | 42 | (90) | ||||||
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Equity risk [Member] | Other Income (Loss) [Member]
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| Sales and Trading Revenue [Abstract] | ||||||||||
| Trading Activity, Gains and Losses, Net | 505 | [1] | 457 | [1] | 1,598 | [1] | 1,442 | [1] | ||
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Credit risk [Member]
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| Sales and Trading Revenue [Abstract] | ||||||||||
| Trading Activity, Gains and Losses, Net | 1,050 | 1,345 | 3,648 | 4,881 | ||||||
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Credit risk [Member] | Trading Account Profits [Member]
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| Sales and Trading Revenue [Abstract] | ||||||||||
| Trading Activity, Gains and Losses, Net | 349 | 663 | 1,805 | 2,387 | ||||||
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Credit risk [Member] | Net Interest Income [Member]
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| Sales and Trading Revenue [Abstract] | ||||||||||
| Trading Activity, Gains and Losses, Net | 622 | 552 | 2,010 | 1,632 | ||||||
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Credit risk [Member] | Other Income (Loss) [Member]
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| Sales and Trading Revenue [Abstract] | ||||||||||
| Trading Activity, Gains and Losses, Net | 79 | [1] | 130 | [1] | (167) | [1] | 862 | [1] | ||
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Other risk [Member]
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| Sales and Trading Revenue [Abstract] | ||||||||||
| Trading Activity, Gains and Losses, Net | 6 | 61 | 268 | 287 | ||||||
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Other risk [Member] | Trading Account Profits [Member]
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| Sales and Trading Revenue [Abstract] | ||||||||||
| Trading Activity, Gains and Losses, Net | 57 | 118 | 374 | 425 | ||||||
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Other risk [Member] | Net Interest Income [Member]
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| Sales and Trading Revenue [Abstract] | ||||||||||
| Trading Activity, Gains and Losses, Net | (56) | (45) | (141) | (168) | ||||||
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Other risk [Member] | Other Income (Loss) [Member]
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| Sales and Trading Revenue [Abstract] | ||||||||||
| Trading Activity, Gains and Losses, Net | $ 5 | [1] | $ (12) | [1] | $ 35 | [1] | $ 30 | [1] | ||
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