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Derivatives - Derivatives Designated as Accounting Hedges - Cash Flow Hedges (Details) (USD $)
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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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| In Text Details [Abstract] | ||||||||||
| Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months | $ 1,300,000,000 | |||||||||
| Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months, Net of Tax | (836,000,000) | |||||||||
| Loss, Net Investment Hedge Related to Foreign Exchange Risk Excluded From Accumulated Other Comprehensive Income | (17,000,000) | (7,000,000) | (179,000,000) | |||||||
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Cash Flow Hedging [Member]
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| Cash Flow Hedges And Net Investment Hedges [Abstract] | ||||||||||
| Gain (losses) Recognized in Accumulated OCI on Derivatives | (374,000,000) | (1,015,000,000) | 38,000,000 | (922,000,000) | ||||||
| Gains (losses) in Income Reclassified from Accumulated OCI | (246,000,000) | (487,000,000) | (440,000,000) | (815,000,000) | ||||||
| Hedge Ineffectiveness and Amounts Excluded from Effectiveness Testing | (30,000,000) | [1] | (36,000,000) | [1] | ||||||
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Interest Rate Risk on Variable Rate Portfolios [Member] | Cash Flow Hedging [Member]
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| Cash Flow Hedges And Net Investment Hedges [Abstract] | ||||||||||
| Gain (losses) Recognized in Accumulated OCI on Derivatives | (160,000,000) | (878,000,000) | (53,000,000) | (722,000,000) | ||||||
| Gains (losses) in Income Reclassified from Accumulated OCI | (224,000,000) | (444,000,000) | (376,000,000) | (748,000,000) | ||||||
| Hedge Ineffectiveness and Amounts Excluded from Effectiveness Testing | (30,000,000) | [1] | (34,000,000) | [1] | ||||||
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Commodity price risk on commodity inventory [Member] | Cash Flow Hedging [Member]
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| Cash Flow Hedges And Net Investment Hedges [Abstract] | ||||||||||
| Gain (losses) Recognized in Accumulated OCI on Derivatives | (1,000,000) | (9,000,000) | ||||||||
| Gains (losses) in Income Reclassified from Accumulated OCI | 2,000,000 | 1,000,000 | (3,000,000) | 3,000,000 | ||||||
| Hedge Ineffectiveness and Amounts Excluded from Effectiveness Testing | (2,000,000) | [1] | ||||||||
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Price risk on restricted stock awards [Member] | Cash Flow Hedging [Member]
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| Cash Flow Hedges And Net Investment Hedges [Abstract] | ||||||||||
| Gain (losses) Recognized in Accumulated OCI on Derivatives | (214,000,000) | (136,000,000) | 91,000,000 | (191,000,000) | ||||||
| Gains (losses) in Income Reclassified from Accumulated OCI | (24,000,000) | (44,000,000) | (61,000,000) | (70,000,000) | ||||||
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Foreign Exchange Risk [Member] | Net Investment Hedging [Member]
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| Cash Flow Hedges And Net Investment Hedges [Abstract] | ||||||||||
| Gain (losses) Recognized in Accumulated OCI on Derivatives | 1,157,000,000 | (653,000,000) | 128,000,000 | (1,615,000,000) | ||||||
| Gains (losses) in Income Reclassified from Accumulated OCI | 4,000,000 | (37,000,000) | 423,000,000 | |||||||
| Hedge Ineffectiveness and Amounts Excluded from Effectiveness Testing | $ (160,000,000) | [1] | $ (139,000,000) | [1] | $ (167,000,000) | [1] | $ (250,000,000) | [1] | ||
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