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Fair Value Disclosures (Net Gains (Losses) Due to Changes in Fair Value for Items Measured at Fair Value Pursuant to the Fair Value Option Election) (Details) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | |||||||
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2010
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Federal Funds Sold and Securities Purchased under Agreements to Resell
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| Gains (losses) due to changes in fair value | $ 13 | $ 12 | ||||||
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Deposits
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| Gains (losses) due to changes in fair value | (29) | (51) | (171) | |||||
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Commercial Paper and Other Short-term Borrowings
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| Gains (losses) due to changes in fair value | (31) | [1] | 567 | [1] | (8) | [1] | ||
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Securities Sold under Agreements to Repurchase
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| Gains (losses) due to changes in fair value | (19) | (4) | 8 | |||||
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Long-term Borrowings
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| Gains (losses) due to changes in fair value | (7,008) | [1] | 3,129 | [1] | (1,721) | [1] | ||
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Principal Transactions-Trading
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| Gains (losses) due to changes in fair value attributable to changes in the credit quality of the Company | (4,402) | 3,681 | (873) | |||||
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Principal Transactions-Trading | Federal Funds Sold and Securities Purchased under Agreements to Resell
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| Gains (losses) due to changes in fair value | 8 | 12 | ||||||
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Principal Transactions-Trading | Deposits
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| Gains (losses) due to changes in fair value | 57 | 66 | 2 | |||||
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Principal Transactions-Trading | Commercial Paper and Other Short-term Borrowings
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| Gains (losses) due to changes in fair value | (31) | [1] | 567 | [1] | (8) | [1] | ||
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Principal Transactions-Trading | Securities Sold under Agreements to Repurchase
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| Gains (losses) due to changes in fair value | (15) | 3 | 9 | |||||
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Principal Transactions-Trading | Long-term Borrowings
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| Gains (losses) due to changes in fair value | (5,687) | [1] | 4,204 | [1] | (872) | [1] | ||
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Interest Income (Expense) | Federal Funds Sold and Securities Purchased under Agreements to Resell
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| Gains (losses) due to changes in fair value | 5 | 0 | ||||||
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Interest Income (Expense) | Deposits
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| Gains (losses) due to changes in fair value | (86) | (117) | (173) | |||||
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Interest Income (Expense) | Commercial Paper and Other Short-term Borrowings
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| Gains (losses) due to changes in fair value | 0 | [1] | 0 | [1] | 0 | [1] | ||
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Interest Income (Expense) | Securities Sold under Agreements to Repurchase
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| Gains (losses) due to changes in fair value | (4) | (7) | (1) | |||||
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Interest Income (Expense) | Long-term Borrowings
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| Gains (losses) due to changes in fair value | $ (1,321) | [1] | $ (1,075) | [1] | $ (849) | [1] | ||
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