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Derivatives - Derivative Balances (Details) (USD $)
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Mar. 31, 2014
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Dec. 31, 2013
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| Notional Amount of Derivatives, [Abstract] | ||||||
| Contract/Notional | $ 1,348,481,000,000 | $ 1,328,787,000,000 | ||||
| Derivative Assets [Abstract] | ||||||
| Gross Derivative Assets | 824,300,000,000 | 920,300,000,000 | ||||
| Less: Legally enforceable master netting agreements | (736,200,000,000) | (825,500,000,000) | ||||
| Less: Cash collateral received/paid | (42,800,000,000) | (47,300,000,000) | ||||
| Derivative assets | 45,302,000,000 | 47,495,000,000 | ||||
| Derivative Liabilities [Abstract] | ||||||
| Gross Derivative Liabilities | 809,500,000,000 | 906,400,000,000 | ||||
| Less: Legally enforceable master netting agreements | (736,200,000,000) | (825,500,000,000) | ||||
| Less: Cash collateral received/paid | (36,400,000,000) | (43,500,000,000) | ||||
| Derivative Liability | 36,911,000,000 | 37,407,000,000 | ||||
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Not Designated as Hedging Instrument [Member]
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| Derivative Assets [Abstract] | ||||||
| Gross Derivative Assets | 815,300,000,000 | 911,100,000,000 | ||||
| Derivative Liabilities [Abstract] | ||||||
| Gross Derivative Liabilities | 807,200,000,000 | 903,400,000,000 | ||||
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Designated as Hedging Instrument [Member]
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| Derivative Assets [Abstract] | ||||||
| Gross Derivative Assets | 9,000,000,000 | 9,200,000,000 | ||||
| Derivative Liabilities [Abstract] | ||||||
| Gross Derivative Liabilities | 2,300,000,000 | 3,000,000,000 | ||||
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Interest Rate Contracts [Member] | Swap [Member]
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| Notional Amount of Derivatives, [Abstract] | ||||||
| Contract/Notional | 31,892,500,000,000 | [1] | 33,272,000,000,000 | [1] | ||
| Derivative Assets [Abstract] | ||||||
| Gross Derivative Assets | 591,000,000,000 | 667,400,000,000 | ||||
| Derivative Liabilities [Abstract] | ||||||
| Gross Derivative Liabilities | 578,600,000,000 | 659,300,000,000 | ||||
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Interest Rate Contracts [Member] | Swap [Member] | Not Designated as Hedging Instrument [Member]
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||||||
| Derivative Assets [Abstract] | ||||||
| Gross Derivative Assets | 583,100,000,000 | 659,900,000,000 | ||||
| Derivative Liabilities [Abstract] | ||||||
| Gross Derivative Liabilities | 577,900,000,000 | 658,400,000,000 | ||||
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Interest Rate Contracts [Member] | Swap [Member] | Designated as Hedging Instrument [Member]
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| Derivative Assets [Abstract] | ||||||
| Gross Derivative Assets | 7,900,000,000 | 7,500,000,000 | ||||
| Derivative Liabilities [Abstract] | ||||||
| Gross Derivative Liabilities | 700,000,000 | 900,000,000 | ||||
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Interest Rate Contracts [Member] | Futures and Forwards [Member]
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| Notional Amount of Derivatives, [Abstract] | ||||||
| Contract/Notional | 7,900,800,000,000 | [1] | 8,217,600,000,000 | [1] | ||
| Derivative Assets [Abstract] | ||||||
| Gross Derivative Assets | 1,300,000,000 | 1,600,000,000 | ||||
| Derivative Liabilities [Abstract] | ||||||
| Gross Derivative Liabilities | 1,200,000,000 | 1,500,000,000 | ||||
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Interest Rate Contracts [Member] | Futures and Forwards [Member] | Not Designated as Hedging Instrument [Member]
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| Derivative Assets [Abstract] | ||||||
| Gross Derivative Assets | 1,300,000,000 | 1,600,000,000 | ||||
| Derivative Liabilities [Abstract] | ||||||
| Gross Derivative Liabilities | 1,200,000,000 | 1,500,000,000 | ||||
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Interest Rate Contracts [Member] | Futures and Forwards [Member] | Designated as Hedging Instrument [Member]
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| Derivative Assets [Abstract] | ||||||
| Gross Derivative Assets | 0 | 0 | ||||
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Interest Rate Contracts [Member] | Written Options [Member]
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| Notional Amount of Derivatives, [Abstract] | ||||||
| Contract/Notional | 1,925,800,000,000 | [1] | 2,065,400,000,000 | [1] | ||
| Derivative Assets [Abstract] | ||||||
| Gross Derivative Assets | ||||||
| Derivative Liabilities [Abstract] | ||||||
| Gross Derivative Liabilities | 67,900,000,000 | 64,400,000,000 | ||||
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Interest Rate Contracts [Member] | Written Options [Member] | Not Designated as Hedging Instrument [Member]
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||||||
| Derivative Assets [Abstract] | ||||||
| Gross Derivative Assets | ||||||
| Derivative Liabilities [Abstract] | ||||||
| Gross Derivative Liabilities | 67,900,000,000 | 64,400,000,000 | ||||
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Interest Rate Contracts [Member] | Purchased Options [Member]
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| Notional Amount of Derivatives, [Abstract] | ||||||
| Contract/Notional | 1,901,300,000,000 | [1] | 2,028,300,000,000 | [1] | ||
| Derivative Assets [Abstract] | ||||||
| Gross Derivative Assets | 67,300,000,000 | 65,400,000,000 | ||||
| Derivative Liabilities [Abstract] | ||||||
| Gross Derivative Liabilities | 0 | 0 | ||||
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Interest Rate Contracts [Member] | Purchased Options [Member] | Not Designated as Hedging Instrument [Member]
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| Derivative Assets [Abstract] | ||||||
| Gross Derivative Assets | 67,300,000,000 | 65,400,000,000 | ||||
| Derivative Liabilities [Abstract] | ||||||
| Gross Derivative Liabilities | ||||||
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Foreign Exchange Contract [Member] | Swap [Member]
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| Notional Amount of Derivatives, [Abstract] | ||||||
| Contract/Notional | 2,258,300,000,000 | [1] | 2,284,100,000,000 | [1] | ||
| Derivative Assets [Abstract] | ||||||
| Gross Derivative Assets | 35,800,000,000 | 44,100,000,000 | ||||
| Derivative Liabilities [Abstract] | ||||||
| Gross Derivative Liabilities | 34,900,000,000 | 43,700,000,000 | ||||
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Foreign Exchange Contract [Member] | Swap [Member] | Not Designated as Hedging Instrument [Member]
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| Derivative Assets [Abstract] | ||||||
| Gross Derivative Assets | 35,100,000,000 | 43,100,000,000 | ||||
| Derivative Liabilities [Abstract] | ||||||
| Gross Derivative Liabilities | 34,200,000,000 | 42,700,000,000 | ||||
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Foreign Exchange Contract [Member] | Swap [Member] | Designated as Hedging Instrument [Member]
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| Derivative Assets [Abstract] | ||||||
| Gross Derivative Assets | 700,000,000 | 1,000,000,000 | ||||
| Derivative Liabilities [Abstract] | ||||||
| Gross Derivative Liabilities | 700,000,000 | 1,000,000,000 | ||||
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Foreign Exchange Contract [Member] | Spot Futures and Forwards [Member]
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| Notional Amount of Derivatives, [Abstract] | ||||||
| Contract/Notional | 3,504,400,000,000 | [1] | 2,922,500,000,000 | [1] | ||
| Derivative Assets [Abstract] | ||||||
| Gross Derivative Assets | 23,900,000,000 | 33,200,000,000 | ||||
| Derivative Liabilities [Abstract] | ||||||
| Gross Derivative Liabilities | 25,800,000,000 | 34,600,000,000 | ||||
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Foreign Exchange Contract [Member] | Spot Futures and Forwards [Member] | Not Designated as Hedging Instrument [Member]
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| Derivative Assets [Abstract] | ||||||
| Gross Derivative Assets | 23,500,000,000 | 32,500,000,000 | ||||
| Derivative Liabilities [Abstract] | ||||||
| Gross Derivative Liabilities | 24,900,000,000 | 33,500,000,000 | ||||
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Foreign Exchange Contract [Member] | Spot Futures and Forwards [Member] | Designated as Hedging Instrument [Member]
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| Derivative Assets [Abstract] | ||||||
| Gross Derivative Assets | 400,000,000 | 700,000,000 | ||||
| Derivative Liabilities [Abstract] | ||||||
| Gross Derivative Liabilities | 900,000,000 | 1,100,000,000 | ||||
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Foreign Exchange Contract [Member] | Written Options [Member]
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| Notional Amount of Derivatives, [Abstract] | ||||||
| Contract/Notional | 506,100,000,000 | [1] | 412,400,000,000 | [1] | ||
| Derivative Assets [Abstract] | ||||||
| Gross Derivative Assets | ||||||
| Derivative Liabilities [Abstract] | ||||||
| Gross Derivative Liabilities | 8,000,000,000 | 9,200,000,000 | ||||
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Foreign Exchange Contract [Member] | Written Options [Member] | Not Designated as Hedging Instrument [Member]
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| Derivative Assets [Abstract] | ||||||
| Gross Derivative Assets | ||||||
| Derivative Liabilities [Abstract] | ||||||
| Gross Derivative Liabilities | 8,000,000,000 | 9,200,000,000 | ||||
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Foreign Exchange Contract [Member] | Written Options [Member] | Designated as Hedging Instrument [Member]
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| Derivative Assets [Abstract] | ||||||
| Gross Derivative Assets | ||||||
| Derivative Liabilities [Abstract] | ||||||
| Gross Derivative Liabilities | ||||||
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Foreign Exchange Contract [Member] | Purchased Options [Member]
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| Notional Amount of Derivatives, [Abstract] | ||||||
| Contract/Notional | 482,400,000,000 | [1] | 392,400,000,000 | [1] | ||
| Derivative Assets [Abstract] | ||||||
| Gross Derivative Assets | 7,600,000,000 | 8,800,000,000 | ||||
| Derivative Liabilities [Abstract] | ||||||
| Gross Derivative Liabilities | 0 | 0 | ||||
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Foreign Exchange Contract [Member] | Purchased Options [Member] | Not Designated as Hedging Instrument [Member]
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||||||
| Derivative Assets [Abstract] | ||||||
| Gross Derivative Assets | 7,600,000,000 | 8,800,000,000 | ||||
| Derivative Liabilities [Abstract] | ||||||
| Gross Derivative Liabilities | ||||||
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Foreign Exchange Contract [Member] | Purchased Options [Member] | Designated as Hedging Instrument [Member]
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||||||
| Derivative Assets [Abstract] | ||||||
| Gross Derivative Assets | ||||||
| Derivative Liabilities [Abstract] | ||||||
| Gross Derivative Liabilities | ||||||
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Equity Contracts [Member] | Swap [Member]
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| Notional Amount of Derivatives, [Abstract] | ||||||
| Contract/Notional | 187,800,000,000 | [1] | 162,000,000,000 | [1] | ||
| Derivative Assets [Abstract] | ||||||
| Gross Derivative Assets | 3,500,000,000 | 3,600,000,000 | ||||
| Derivative Liabilities [Abstract] | ||||||
| Gross Derivative Liabilities | 3,900,000,000 | 4,200,000,000 | ||||
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Equity Contracts [Member] | Swap [Member] | Not Designated as Hedging Instrument [Member]
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| Derivative Assets [Abstract] | ||||||
| Gross Derivative Assets | 3,500,000,000 | 3,600,000,000 | ||||
| Derivative Liabilities [Abstract] | ||||||
| Gross Derivative Liabilities | 3,900,000,000 | 4,200,000,000 | ||||
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Equity Contracts [Member] | Futures and Forwards [Member]
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| Notional Amount of Derivatives, [Abstract] | ||||||
| Contract/Notional | 75,900,000,000 | [1] | 71,400,000,000 | [1] | ||
| Derivative Assets [Abstract] | ||||||
| Gross Derivative Assets | 1,100,000,000 | 1,100,000,000 | ||||
| Derivative Liabilities [Abstract] | ||||||
| Gross Derivative Liabilities | 1,500,000,000 | 1,400,000,000 | ||||
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Equity Contracts [Member] | Futures and Forwards [Member] | Not Designated as Hedging Instrument [Member]
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| Derivative Assets [Abstract] | ||||||
| Gross Derivative Assets | 1,100,000,000 | 1,100,000,000 | ||||
| Derivative Liabilities [Abstract] | ||||||
| Gross Derivative Liabilities | 1,500,000,000 | 1,400,000,000 | ||||
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Equity Contracts [Member] | Written Options [Member]
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| Notional Amount of Derivatives, [Abstract] | ||||||
| Contract/Notional | 320,900,000,000 | [1] | 315,600,000,000 | [1] | ||
| Derivative Assets [Abstract] | ||||||
| Gross Derivative Assets | ||||||
| Derivative Liabilities [Abstract] | ||||||
| Gross Derivative Liabilities | 29,600,000,000 | 29,600,000,000 | ||||
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Equity Contracts [Member] | Written Options [Member] | Not Designated as Hedging Instrument [Member]
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||||||
| Derivative Assets [Abstract] | ||||||
| Gross Derivative Assets | ||||||
| Derivative Liabilities [Abstract] | ||||||
| Gross Derivative Liabilities | 29,600,000,000 | 29,600,000,000 | ||||
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Equity Contracts [Member] | Purchased Options [Member]
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| Notional Amount of Derivatives, [Abstract] | ||||||
| Contract/Notional | 285,600,000,000 | [1] | 266,700,000,000 | [1] | ||
| Derivative Assets [Abstract] | ||||||
| Gross Derivative Assets | 28,700,000,000 | 30,400,000,000 | ||||
| Derivative Liabilities [Abstract] | ||||||
| Gross Derivative Liabilities | 0 | 0 | ||||
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Equity Contracts [Member] | Purchased Options [Member] | Not Designated as Hedging Instrument [Member]
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| Derivative Assets [Abstract] | ||||||
| Gross Derivative Assets | 28,700,000,000 | 30,400,000,000 | ||||
| Derivative Liabilities [Abstract] | ||||||
| Gross Derivative Liabilities | ||||||
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Commodity Contracts [Member] | Swap [Member]
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||||||
| Notional Amount of Derivatives, [Abstract] | ||||||
| Contract/Notional | 71,800,000,000 | [1] | 73,100,000,000 | [1] | ||
| Derivative Assets [Abstract] | ||||||
| Gross Derivative Assets | 3,800,000,000 | 3,800,000,000 | ||||
| Derivative Liabilities [Abstract] | ||||||
| Gross Derivative Liabilities | 5,700,000,000 | 5,700,000,000 | ||||
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Commodity Contracts [Member] | Swap [Member] | Not Designated as Hedging Instrument [Member]
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| Derivative Assets [Abstract] | ||||||
| Gross Derivative Assets | 3,800,000,000 | 3,800,000,000 | ||||
| Derivative Liabilities [Abstract] | ||||||
| Gross Derivative Liabilities | 5,700,000,000 | 5,700,000,000 | ||||
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Commodity Contracts [Member] | Swap [Member] | Designated as Hedging Instrument [Member]
|
||||||
| Derivative Assets [Abstract] | ||||||
| Gross Derivative Assets | 0 | 0 | ||||
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Commodity Contracts [Member] | Futures and Forwards [Member]
|
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| Notional Amount of Derivatives, [Abstract] | ||||||
| Contract/Notional | 541,400,000,000 | [1] | 454,400,000,000 | [1] | ||
| Derivative Assets [Abstract] | ||||||
| Gross Derivative Assets | 5,800,000,000 | 4,700,000,000 | ||||
| Derivative Liabilities [Abstract] | ||||||
| Gross Derivative Liabilities | 3,600,000,000 | 2,500,000,000 | ||||
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Commodity Contracts [Member] | Futures and Forwards [Member] | Not Designated as Hedging Instrument [Member]
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| Derivative Assets [Abstract] | ||||||
| Gross Derivative Assets | 5,800,000,000 | 4,700,000,000 | ||||
| Derivative Liabilities [Abstract] | ||||||
| Gross Derivative Liabilities | 3,600,000,000 | 2,500,000,000 | ||||
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Commodity Contracts [Member] | Written Options [Member]
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| Notional Amount of Derivatives, [Abstract] | ||||||
| Contract/Notional | 156,500,000,000 | [1] | 157,300,000,000 | [1] | ||
| Derivative Assets [Abstract] | ||||||
| Gross Derivative Assets | ||||||
| Derivative Liabilities [Abstract] | ||||||
| Gross Derivative Liabilities | 4,900,000,000 | 5,000,000,000 | ||||
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Commodity Contracts [Member] | Written Options [Member] | Not Designated as Hedging Instrument [Member]
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||||||
| Derivative Assets [Abstract] | ||||||
| Gross Derivative Assets | ||||||
| Derivative Liabilities [Abstract] | ||||||
| Gross Derivative Liabilities | 4,900,000,000 | 5,000,000,000 | ||||
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Commodity Contracts [Member] | Purchased Options [Member]
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| Notional Amount of Derivatives, [Abstract] | ||||||
| Contract/Notional | 158,400,000,000 | [1] | 164,000,000,000 | [1] | ||
| Derivative Assets [Abstract] | ||||||
| Gross Derivative Assets | 5,100,000,000 | 5,200,000,000 | ||||
| Derivative Liabilities [Abstract] | ||||||
| Gross Derivative Liabilities | 0 | 0 | ||||
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Commodity Contracts [Member] | Purchased Options [Member] | Not Designated as Hedging Instrument [Member]
|
||||||
| Derivative Assets [Abstract] | ||||||
| Gross Derivative Assets | 5,100,000,000 | 5,200,000,000 | ||||
| Derivative Liabilities [Abstract] | ||||||
| Gross Derivative Liabilities | ||||||
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Credit Derivatives [Member] | Credit Default Swap [Member] | Credit Default Swap, Buying Protection [Member]
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| Notional Amount of Derivatives, [Abstract] | ||||||
| Contract/Notional | 1,304,800,000,000 | [1] | 1,305,100,000,000 | [1] | ||
| Derivative Assets [Abstract] | ||||||
| Gross Derivative Assets | 13,700,000,000 | 15,700,000,000 | ||||
| Derivative Liabilities [Abstract] | ||||||
| Gross Derivative Liabilities | 28,100,000,000 | 28,100,000,000 | ||||
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Credit Derivatives [Member] | Credit Default Swap [Member] | Credit Default Swap, Buying Protection [Member] | Not Designated as Hedging Instrument [Member]
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| Derivative Assets [Abstract] | ||||||
| Gross Derivative Assets | 13,700,000,000 | 15,700,000,000 | ||||
| Derivative Liabilities [Abstract] | ||||||
| Gross Derivative Liabilities | 28,100,000,000 | 28,100,000,000 | ||||
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Credit Derivatives [Member] | Credit Default Swap [Member] | Credit Default Swap, Selling Protection [Member]
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| Notional Amount of Derivatives, [Abstract] | ||||||
| Contract/Notional | 1,272,003,000,000 | [1] | 1,265,380,000,000 | [1] | ||
| Derivative Assets [Abstract] | ||||||
| Gross Derivative Assets | 29,300,000,000 | 29,300,000,000 | ||||
| Derivative Liabilities [Abstract] | ||||||
| Gross Derivative Liabilities | 11,932,000,000 | 13,814,000,000 | ||||
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Credit Derivatives [Member] | Credit Default Swap [Member] | Credit Default Swap, Selling Protection [Member] | Not Designated as Hedging Instrument [Member]
|
||||||
| Derivative Assets [Abstract] | ||||||
| Gross Derivative Assets | 29,300,000,000 | 29,300,000,000 | ||||
| Derivative Liabilities [Abstract] | ||||||
| Gross Derivative Liabilities | 11,900,000,000 | 13,800,000,000 | ||||
|
Credit Derivatives [Member] | Return Swaps Other [Member] | Credit Default Swap, Buying Protection [Member]
|
||||||
| Notional Amount of Derivatives, [Abstract] | ||||||
| Contract/Notional | 60,000,000,000 | [1] | 38,100,000,000 | [1] | ||
| Derivative Assets [Abstract] | ||||||
| Gross Derivative Assets | 400,000,000 | 2,000,000,000 | ||||
| Derivative Liabilities [Abstract] | ||||||
| Gross Derivative Liabilities | 3,800,000,000 | 3,200,000,000 | ||||
|
Credit Derivatives [Member] | Return Swaps Other [Member] | Credit Default Swap, Buying Protection [Member] | Not Designated as Hedging Instrument [Member]
|
||||||
| Derivative Assets [Abstract] | ||||||
| Gross Derivative Assets | 400,000,000 | 2,000,000,000 | ||||
| Derivative Liabilities [Abstract] | ||||||
| Gross Derivative Liabilities | 3,800,000,000 | 3,200,000,000 | ||||
|
Credit Derivatives [Member] | Return Swaps Other [Member] | Credit Default Swap, Selling Protection [Member]
|
||||||
| Notional Amount of Derivatives, [Abstract] | ||||||
| Contract/Notional | 76,478,000,000 | [1] | 63,407,000,000 | [1] | ||
| Derivative Assets [Abstract] | ||||||
| Gross Derivative Assets | 6,000,000,000 | 4,000,000,000 | ||||
| Derivative Liabilities [Abstract] | ||||||
| Gross Derivative Liabilities | 128,000,000 | 177,000,000 | ||||
|
Credit Derivatives [Member] | Return Swaps Other [Member] | Credit Default Swap, Selling Protection [Member] | Not Designated as Hedging Instrument [Member]
|
||||||
| Derivative Assets [Abstract] | ||||||
| Gross Derivative Assets | 6,000,000,000 | 4,000,000,000 | ||||
| Derivative Liabilities [Abstract] | ||||||
| Gross Derivative Liabilities | $ 100,000,000 | $ 200,000,000 | ||||
|
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