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Derivatives - Net Investment and Economic Hedges (Details) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 6 Months Ended | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Jun. 30, 2012
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Jun. 30, 2011
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Jun. 30, 2012
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Jun. 30, 2011
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| Net gains (losses) on economic hedges [Abstract] | ||||||||||||
| Interest rate risk | $ 17 | [1] | $ 77 | [1] | $ 11 | [1] | $ (4) | [1] | ||||
| Foreign currency risk | (703) | [1] | 1,055 | [1] | (504) | [1] | 3,146 | [1] | ||||
| Credit risk | 18 | [1] | (2) | [1] | (31) | [1] | (17) | [1] | ||||
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Foreign Exchange Risk [Member]
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| Net investment hedges of foreign operations [Abstract] | ||||||||||||
| Hedge Ineffectivenes and Amounts Excluded from Effectiveness Testing | (100) | [1] | (87) | (98) | [1] | (157) | [1] | |||||
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Net Investment Hedging [Member] | Foreign Exchange Risk [Member]
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| Net investment hedges of foreign operations [Abstract] | ||||||||||||
| Gains (losses) Recognized in Accumulated OCI | 555 | (494) | 110 | (961) | ||||||||
| Gains (losses) in Income Reclassified from Accumulated OCI | 4 | [2] | (37) | [2] | (3) | [2] | ||||||
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Trading Account Assets [Member] | Net Investment Hedging [Member] | Designated as Hedging Instrument [Member]
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| Net investment hedges of foreign operations [Abstract] | ||||||||||||
| Derivative Instruments in Hedges, Net Investment in Foreign Operations, Assets, Fair Value | 477 | 690 | 477 | 690 | ||||||||
| Notional Amount of Derivative Instruments Designated as Net Investment Hedges | 13,628 | 20,068 | 13,628 | 20,068 | ||||||||
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Trading Liabilities [Member] | Net Investment Hedging [Member] | Designated as Hedging Instrument [Member]
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| Net investment hedges of foreign operations [Abstract] | ||||||||||||
| Derivative Instruments in Hedges, Net Investment in Foreign Operations, Liabilities, Fair Value | 364 | 492 | 364 | 492 | ||||||||
| Notional Amount of Derivative Instruments Designated as Net Investment Hedges | 12,740 | 7,338 | 12,740 | 7,338 | ||||||||
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Long-term Borrowings [Member] | Net Investment Hedging [Member] | Designated as Hedging Instrument [Member]
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| Net investment hedges of foreign operations [Abstract] | ||||||||||||
| Derivative Instruments in Hedges, Net Investment in Foreign Operations, Liabilities, Fair Value | $ 0 | $ 61 | $ 0 | $ 61 | ||||||||
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