Derivative Instruments - Derivatives Netting (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	$ 1,083,987,000,000	$ 1,164,733,000,000
Amounts netted on the Consolidated balance sheets	(1,038,146,000,000)	(1,114,708,000,000)
Net derivative receivables	45,841,000,000	50,025,000,000
Derivative receivables where an appropriate legal opinion has not been either sought or obtained	16,537,000,000	15,734,000,000
Total derivative receivables recognized on the Consolidated Balance Sheets, Gross derivative receivables	1,100,524,000,000	1,180,467,000,000
Total derivative receivables recognized on the Consolidated Balance Sheets, Net derivative receivables	62,378,000,000	65,759,000,000
Derivative asset, collateral, obligations to return cash, offset	62,000,000,000	63,900,000,000
Gross and Net Derivatives Payables by Contract and Settlment Type:
Gross derivative payables	1,055,642,000,000	1,144,452,000,000
Amounts netted on the Consolidated balance sheets	(1,021,048,000,000)	(1,102,835,000,000)
Derivative derivative payables	34,594,000,000	41,617,000,000
Derivative payables where an appropriate legal opinion has not been either sought or obtained	16,201,000,000	15,697,000,000
Total derivative payables recognized on the Consolidated Balance Sheets, Gross derivative payables	1,071,843,000,000	1,160,149,000,000
Total derivative payables recognized on the Consolidated Balance Sheets, Net derivative payables	50,795,000,000	57,314,000,000
Derivative liability, collateral, right to reclaim cash, offset	44,900,000,000	52,100,000,000
Interest rate contracts
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	814,260,000,000	848,875,000,000
Amounts netted on the Consolidated balance sheets	(791,472,000,000)	(828,897,000,000)
Net derivative receivables	22,788,000,000	19,978,000,000
Total derivative receivables recognized on the Consolidated Balance Sheets, Gross derivative receivables	820,301,000,000	854,679,000,000
Total derivative receivables recognized on the Consolidated Balance Sheets, Net derivative receivables	28,829,000,000	25,782,000,000
Gross and Net Derivatives Payables by Contract and Settlment Type:
Gross derivative payables	784,288,000,000	822,548,000,000
Amounts netted on the Consolidated balance sheets	(772,129,000,000)	(812,071,000,000)
Derivative derivative payables	12,159,000,000	10,477,000,000
Total derivative payables recognized on the Consolidated Balance Sheets, Gross derivative payables	787,218,000,000	825,354,000,000
Total derivative payables recognized on the Consolidated Balance Sheets, Net derivative payables	15,089,000,000	13,283,000,000
Interest rate contracts | Over the Counter
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	498,230,000,000	486,449,000,000
Amounts netted on the Consolidated balance sheets	(475,647,000,000)	(466,493,000,000)
Net derivative receivables	22,583,000,000	19,956,000,000
Gross and Net Derivatives Payables by Contract and Settlment Type:
Gross derivative payables	472,544,000,000	467,850,000,000
Amounts netted on the Consolidated balance sheets	(461,345,000,000)	(458,081,000,000)
Derivative derivative payables	11,199,000,000	9,769,000,000
Interest rate contracts | OTC-cleared
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	316,030,000,000	362,426,000,000
Amounts netted on the Consolidated balance sheets	(315,825,000,000)	(362,404,000,000)
Net derivative receivables	205,000,000	22,000,000
Gross and Net Derivatives Payables by Contract and Settlment Type:
Gross derivative payables	311,744,000,000	354,698,000,000
Amounts netted on the Consolidated balance sheets	(310,784,000,000)	(353,990,000,000)
Derivative derivative payables	960,000,000	708,000,000
Interest rate contracts | Exchange-traded
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	0	0
Amounts netted on the Consolidated balance sheets	0	0
Net derivative receivables	0	0
Gross and Net Derivatives Payables by Contract and Settlment Type:
Gross derivative payables	0	0
Amounts netted on the Consolidated balance sheets	0	0
Derivative derivative payables	0	0
Credit derivatives
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	80,565,000,000	83,110,000,000
Amounts netted on the Consolidated balance sheets	(78,088,000,000)	(82,004,000,000)
Net derivative receivables	2,477,000,000	1,106,000,000
Total derivative receivables recognized on the Consolidated Balance Sheets, Gross derivative receivables	81,052,000,000	83,520,000,000
Total derivative receivables recognized on the Consolidated Balance Sheets, Net derivative receivables	2,964,000,000	1,516,000,000
Gross and Net Derivatives Payables by Contract and Settlment Type:
Gross derivative payables	79,092,000,000	81,729,000,000
Amounts netted on the Consolidated balance sheets	(76,724,000,000)	(80,121,000,000)
Derivative derivative payables	2,368,000,000	1,608,000,000
Total derivative payables recognized on the Consolidated Balance Sheets, Gross derivative payables	79,556,000,000	82,402,000,000
Total derivative payables recognized on the Consolidated Balance Sheets, Net derivative payables	2,832,000,000	2,281,000,000
Credit derivatives | Over the Counter
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	69,143,000,000	66,269,000,000
Amounts netted on the Consolidated balance sheets	(68,041,000,000)	(65,725,000,000)
Net derivative receivables	1,102,000,000	544,000,000
Gross and Net Derivatives Payables by Contract and Settlment Type:
Gross derivative payables	67,182,000,000	65,223,000,000
Amounts netted on the Consolidated balance sheets	(65,923,000,000)	(63,671,000,000)
Derivative derivative payables	1,259,000,000	1,552,000,000
Credit derivatives | OTC-cleared
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	11,422,000,000	16,841,000,000
Amounts netted on the Consolidated balance sheets	(10,047,000,000)	(16,279,000,000)
Net derivative receivables	1,375,000,000	562,000,000
Gross and Net Derivatives Payables by Contract and Settlment Type:
Gross derivative payables	11,910,000,000	16,506,000,000
Amounts netted on the Consolidated balance sheets	(10,801,000,000)	(16,450,000,000)
Derivative derivative payables	1,109,000,000	56,000,000
Foreign exchange contract
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	110,304,000,000	148,999,000,000
Amounts netted on the Consolidated balance sheets	(101,626,000,000)	(136,809,000,000)
Net derivative receivables	8,678,000,000	12,190,000,000
Total derivative receivables recognized on the Consolidated Balance Sheets, Gross derivative receivables	113,251,000,000	153,599,000,000
Total derivative receivables recognized on the Consolidated Balance Sheets, Net derivative receivables	11,625,000,000	16,790,000,000
Gross and Net Derivatives Payables by Contract and Settlment Type:
Gross derivative payables	110,917,000,000	155,171,000,000
Amounts netted on the Consolidated balance sheets	(103,002,000,000)	(144,178,000,000)
Derivative derivative payables	7,915,000,000	10,993,000,000
Total derivative payables recognized on the Consolidated Balance Sheets, Gross derivative payables	114,684,000,000	160,125,000,000
Total derivative payables recognized on the Consolidated Balance Sheets, Net derivative payables	11,682,000,000	15,947,000,000
Foreign exchange contract | Over the Counter
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	110,256,000,000	148,953,000,000
Amounts netted on the Consolidated balance sheets	(101,578,000,000)	(136,763,000,000)
Net derivative receivables	8,678,000,000	12,190,000,000
Gross and Net Derivatives Payables by Contract and Settlment Type:
Gross derivative payables	110,876,000,000	155,110,000,000
Amounts netted on the Consolidated balance sheets	(102,961,000,000)	(144,119,000,000)
Derivative derivative payables	7,915,000,000	10,991,000,000
Foreign exchange contract | OTC-cleared
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	48,000,000	46,000,000
Amounts netted on the Consolidated balance sheets	(48,000,000)	(46,000,000)
Net derivative receivables	0	0
Gross and Net Derivatives Payables by Contract and Settlment Type:
Gross derivative payables	41,000,000	61,000,000
Amounts netted on the Consolidated balance sheets	(41,000,000)	(59,000,000)
Derivative derivative payables	0	2,000,000
Foreign exchange contract | Exchange-traded
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	0	0
Amounts netted on the Consolidated balance sheets	0	0
Net derivative receivables	0	0
Gross and Net Derivatives Payables by Contract and Settlment Type:
Gross derivative payables	0	0
Amounts netted on the Consolidated balance sheets	0	0
Derivative derivative payables	0	0
Equity contracts
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	43,493,000,000	49,602,000,000
Amounts netted on the Consolidated balance sheets	(40,417,000,000)	(40,704,000,000)
Net derivative receivables	3,076,000,000	8,898,000,000
Total derivative receivables recognized on the Consolidated Balance Sheets, Gross derivative receivables	49,794,000,000	52,931,000,000
Total derivative receivables recognized on the Consolidated Balance Sheets, Net derivative receivables	9,377,000,000	12,227,000,000
Gross and Net Derivatives Payables by Contract and Settlment Type:
Gross derivative payables	47,479,000,000	50,644,000,000
Amounts netted on the Consolidated balance sheets	(42,500,000,000)	(39,935,000,000)
Derivative derivative payables	4,979,000,000	10,709,000,000
Total derivative payables recognized on the Consolidated Balance Sheets, Gross derivative payables	53,524,000,000	54,654,000,000
Total derivative payables recognized on the Consolidated Balance Sheets, Net derivative payables	11,024,000,000	14,719,000,000
Equity contracts | Over the Counter
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	23,441,000,000	31,870,000,000
Amounts netted on the Consolidated balance sheets	(23,026,000,000)	(29,289,000,000)
Net derivative receivables	415,000,000	2,581,000,000
Gross and Net Derivatives Payables by Contract and Settlment Type:
Gross derivative payables	29,222,000,000	33,295,000,000
Amounts netted on the Consolidated balance sheets	(25,109,000,000)	(28,520,000,000)
Derivative derivative payables	4,113,000,000	4,775,000,000
Equity contracts | OTC-cleared
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	0	0
Amounts netted on the Consolidated balance sheets	0	0
Net derivative receivables	0	0
Gross and Net Derivatives Payables by Contract and Settlment Type:
Gross derivative payables	0	0
Amounts netted on the Consolidated balance sheets	0	0
Derivative derivative payables	0	0
Equity contracts | Exchange-traded
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	20,052,000,000	17,732,000,000
Amounts netted on the Consolidated balance sheets	(17,391,000,000)	(11,415,000,000)
Net derivative receivables	2,661,000,000	6,317,000,000
Gross and Net Derivatives Payables by Contract and Settlment Type:
Gross derivative payables	18,257,000,000	17,349,000,000
Amounts netted on the Consolidated balance sheets	(17,391,000,000)	(11,415,000,000)
Derivative derivative payables	866,000,000	5,934,000,000
Commodity contracts
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	35,365,000,000	34,147,000,000
Amounts netted on the Consolidated balance sheets	(26,543,000,000)	(26,294,000,000)
Net derivative receivables	8,822,000,000	7,853,000,000
Total derivative receivables recognized on the Consolidated Balance Sheets, Gross derivative receivables	36,126,000,000	35,738,000,000
Total derivative receivables recognized on the Consolidated Balance Sheets, Net derivative receivables	9,583,000,000	9,444,000,000
Gross and Net Derivatives Payables by Contract and Settlment Type:
Gross derivative payables	33,866,000,000	34,360,000,000
Amounts netted on the Consolidated balance sheets	(26,693,000,000)	(26,530,000,000)
Derivative derivative payables	7,173,000,000	7,830,000,000
Total derivative payables recognized on the Consolidated Balance Sheets, Gross derivative payables	36,861,000,000	37,614,000,000
Total derivative payables recognized on the Consolidated Balance Sheets, Net derivative payables	10,168,000,000	11,084,000,000
Commodity contracts | Over the Counter
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	21,951,000,000	21,619,000,000
Amounts netted on the Consolidated balance sheets	(14,860,000,000)	(15,082,000,000)
Net derivative receivables	7,091,000,000	6,537,000,000
Gross and Net Derivatives Payables by Contract and Settlment Type:
Gross derivative payables	20,689,000,000	21,993,000,000
Amounts netted on the Consolidated balance sheets	(15,010,000,000)	(15,318,000,000)
Derivative derivative payables	5,679,000,000	6,675,000,000
Commodity contracts | OTC-cleared
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	0	0
Amounts netted on the Consolidated balance sheets	0	0
Net derivative receivables	0	0
Gross and Net Derivatives Payables by Contract and Settlment Type:
Gross derivative payables	0	0
Amounts netted on the Consolidated balance sheets	0	0
Derivative derivative payables	0	0
Commodity contracts | Exchange-traded
Gross and Net Derivative Receivables by Contract and Settlement Type:
Gross derivative receivables	13,414,000,000	12,528,000,000
Amounts netted on the Consolidated balance sheets	(11,683,000,000)	(11,212,000,000)
Net derivative receivables	1,731,000,000	1,316,000,000
Gross and Net Derivatives Payables by Contract and Settlment Type:
Gross derivative payables	13,177,000,000	12,367,000,000
Amounts netted on the Consolidated balance sheets	(11,683,000,000)	(11,212,000,000)
Derivative derivative payables	$ 1,494,000,000	$ 1,155,000,000