Fair Value Measurements (Details 1) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012		Dec. 31, 2011
Assets:
Gross Balance	$ 186,963		$ 178,729
Netting	(88,604)		(84,996)
Net Balance	98,359		93,733
Liabilities:
Gross Balance	123,410		117,170
Netting	(84,913)		(86,546)
Net Balance	38,497		30,624
Level 1 [Member]
Assets:
Gross Balance	37,533		23,076
Liabilities:
Gross Balance	438		432
Level 2 [Member]
Assets:
Gross Balance	144,255		150,252
Liabilities:
Gross Balance	118,608		112,541
Level 3 [Member]
Assets:
Gross Balance	5,175		5,401
Liabilities:
Gross Balance	4,364		4,197
Domestic Deposits [Member]
Liabilities:
Gross Balance	9,897		9,799
Net Balance	9,897		9,799
Domestic Deposits [Member] | Level 2 [Member]
Liabilities:
Gross Balance	6,989		6,932
Domestic Deposits [Member] | Level 3 [Member]
Liabilities:
Gross Balance	2,908		2,867
Trading Liabilities [Member]
Liabilities:
Gross Balance	7,274		7,342
Net Balance	7,274		7,342
Trading Liabilities [Member] | Level 1 [Member]
Liabilities:
Gross Balance	316		321
Trading Liabilities [Member] | Level 2 [Member]
Liabilities:
Gross Balance	6,958		7,021
Derivatives [Member]
Liabilities:
Gross Balance	99,469
Netting	(84,913)
Net Balance	14,556
Derivatives [Member] | Level 2 [Member]
Liabilities:
Gross Balance	98,178
Derivatives [Member] | Level 3 [Member]
Liabilities:
Gross Balance	1,169
Derivatives [Member] | Interest rate contracts [Member]
Liabilities:
Gross Balance	71,995
Net Balance	71,995
Derivatives [Member] | Foreign exchange contracts [Member]
Liabilities:
Gross Balance	14,606
Net Balance	14,606
Derivatives [Member] | Foreign exchange contracts [Member] | Level 2 [Member]
Liabilities:
Gross Balance	14,363
Derivatives [Member] | Equity Contract [Member]
Liabilities:
Gross Balance	1,062
Net Balance	1,062
Derivatives [Member] | Precious Metals contracts [Member]
Liabilities:
Gross Balance	847
Net Balance	847
Derivatives [Member] | Credit contracts [Member]
Liabilities:
Gross Balance	10,954
Net Balance	10,954
Derivatives [Member] | Other Contract [Member]
Assets:
Gross Balance	1
Net Balance	1
Liabilities:
Gross Balance	5
Net Balance	5
Derivatives [Member] | Other Contract [Member] | Level 2 [Member]
Assets:
Gross Balance	1
Liabilities:
Gross Balance	5
Derivatives [Member] | Derivatives netting [Member]
Liabilities:
Netting	(84,913)
Net Balance	(84,913)
Long-term Debt [Member]
Liabilities:
Gross Balance	6,770		5,043
Net Balance	6,770		5,043
Long-term Debt [Member] | Level 2 [Member]
Liabilities:
Gross Balance	6,483		4,957
Long-term Debt [Member] | Level 3 [Member]
Liabilities:
Gross Balance	287		86
Trading Securities [Member] | Precious Metals contracts [Member]
Assets:
Gross Balance			17,082
Net Balance			17,082
Trading Securities [Member] | Precious Metals contracts [Member] | Level 2 [Member]
Assets:
Gross Balance			17,082
Trading Securities [Member] | Precious metals trading [Member]
Assets:
Gross Balance	14,459
Net Balance	14,459
Trading Securities [Member] | Precious metals trading [Member] | Level 2 [Member]
Assets:
Gross Balance	14,459
Trading Securities [Member] | U.S. Treasury, U.S. Government agencies and sponsored enterprises [Member]
Assets:
Gross Balance	2,147		297
Net Balance	2,147		297
Trading Securities [Member] | U.S. Treasury, U.S. Government agencies and sponsored enterprises [Member] | Level 1 [Member]
Assets:
Gross Balance	1,931		259
Trading Securities [Member] | U.S. Treasury, U.S. Government agencies and sponsored enterprises [Member] | Level 2 [Member]
Assets:
Gross Balance	216		38
Trading Securities [Member] | Collateralized Debt Obligations [Member]
Assets:
Gross Balance	753		755
Net Balance	753		755
Trading Securities [Member] | Collateralized Debt Obligations [Member] | Level 2 [Member]
Assets:
Gross Balance	95		52
Trading Securities [Member] | Collateralized Debt Obligations [Member] | Level 3 [Member]
Assets:
Gross Balance	658		703
Trading Securities [Member] | Corporate debt securities issued by foreign entities [Member] | Corporate [Member]
Assets:
Gross Balance	1,325		2,211
Net Balance	1,325		2,211
Trading Securities [Member] | Corporate debt securities issued by foreign entities [Member] | Corporate [Member] | Level 2 [Member]
Assets:
Gross Balance	637		1,958
Trading Securities [Member] | Corporate debt securities issued by foreign entities [Member] | Corporate [Member] | Level 3 [Member]
Assets:
Gross Balance	688		253
Trading Securities [Member] | Corporate debt securities issued by foreign entities [Member] | Government [Member]
Assets:
Gross Balance	4,425		7,461
Net Balance	4,425		7,461
Trading Securities [Member] | Corporate debt securities issued by foreign entities [Member] | Government [Member] | Level 2 [Member]
Assets:
Gross Balance	4,425		7,461
Trading Securities [Member] | Corporate debt securities issued by foreign entities [Member] | Equity Securities [Member]
Assets:
Gross Balance	36		40
Net Balance	36		40
Trading Securities [Member] | Corporate debt securities issued by foreign entities [Member] | Equity Securities [Member] | Level 2 [Member]
Assets:
Gross Balance	24		27
Trading Securities [Member] | Corporate debt securities issued by foreign entities [Member] | Equity Securities [Member] | Level 3 [Member]
Assets:
Gross Balance	12		13
Trading Securities [Member] | Asset-backed Securities [Member] | Residential mortgages [Member]
Assets:
Gross Balance	274		274
Net Balance	274		274
Trading Securities [Member] | Asset-backed Securities [Member] | Residential mortgages [Member] | Level 2 [Member]
Assets:
Gross Balance	274		274
Trading Securities [Member] | Asset-backed Securities [Member] | Home equity mortgages [Member]
Assets:
Gross Balance			1
Net Balance			1
Trading Securities [Member] | Asset-backed Securities [Member] | Home equity mortgages [Member] | Level 2 [Member]
Assets:
Gross Balance			1
Trading Securities [Member] | Asset-backed Securities [Member] | Student Loans [Member]
Assets:
Gross Balance			2
Net Balance			2
Trading Securities [Member] | Asset-backed Securities [Member] | Student Loans [Member] | Level 2 [Member]
Assets:
Gross Balance			2
Trading Securities [Member] | Asset-backed Securities [Member] | Corporate and Other Domestic Debt Securities [Member]
Assets:
Gross Balance	2,549		1,905
Net Balance	2,549		1,905
Trading Securities [Member] | Asset-backed Securities [Member] | Corporate and Other Domestic Debt Securities [Member] | Level 2 [Member]
Assets:
Gross Balance	950		226
Trading Securities [Member] | Asset-backed Securities [Member] | Corporate and Other Domestic Debt Securities [Member] | Level 3 [Member]
Assets:
Gross Balance	1,599		1,679
Derivatives [Member]
Assets:
Gross Balance	99,859		94,822
Netting	(88,604)		(84,996)
Net Balance	11,255		9,826
Derivatives [Member] | Level 1 [Member]
Assets:
Gross Balance	219		310
Liabilities:
Gross Balance	122
Derivatives [Member] | Level 2 [Member]
Assets:
Gross Balance	97,609		91,990
Derivatives [Member] | Level 3 [Member]
Assets:
Gross Balance	2,031		2,522
Derivatives [Member] | Interest rate contracts [Member]
Assets:
Gross Balance	71,611		61,709
Net Balance	71,611		61,709
Liabilities:
Gross Balance			62,768
Net Balance			62,768
Derivatives [Member] | Interest rate contracts [Member] | Level 1 [Member]
Assets:
Gross Balance	145		135
Liabilities:
Gross Balance	81		66
Derivatives [Member] | Interest rate contracts [Member] | Level 2 [Member]
Assets:
Gross Balance	71,454		61,565
Liabilities:
Gross Balance	71,914		62,702
Derivatives [Member] | Interest rate contracts [Member] | Level 3 [Member]
Assets:
Gross Balance	12		9
Derivatives [Member] | Foreign exchange contracts [Member]
Assets:
Gross Balance	15,326		15,665
Net Balance	15,326		15,665
Liabilities:
Gross Balance			15,426
Net Balance			15,426
Derivatives [Member] | Foreign exchange contracts [Member] | Level 1 [Member]
Assets:
Gross Balance	16		4
Liabilities:
Gross Balance	4		13
Derivatives [Member] | Foreign exchange contracts [Member] | Level 2 [Member]
Assets:
Gross Balance	15,096		15,440
Liabilities:
Gross Balance			15,191
Derivatives [Member] | Foreign exchange contracts [Member] | Level 3 [Member]
Assets:
Gross Balance	214		221
Liabilities:
Gross Balance	239		222
Derivatives [Member] | Equity Contract [Member]
Assets:
Gross Balance	1,216		1,216
Net Balance	1,216		1,216
Liabilities:
Gross Balance			1,251
Net Balance			1,251
Derivatives [Member] | Equity Contract [Member] | Level 2 [Member]
Assets:
Gross Balance	1,035		1,047
Liabilities:
Gross Balance			999
Derivatives [Member] | Equity Contract [Member] | Level 3 [Member]
Assets:
Gross Balance	181		169
Liabilities:
Gross Balance	227		252
Derivatives [Member] | Precious Metals contracts [Member]
Assets:
Gross Balance	965		1,842
Net Balance	965		1,842
Liabilities:
Gross Balance			1,248
Net Balance			1,248
Derivatives [Member] | Precious Metals contracts [Member] | Level 1 [Member]
Assets:
Gross Balance	58	[1]	171
Liabilities:
Gross Balance	37		32
Derivatives [Member] | Precious Metals contracts [Member] | Level 2 [Member]
Assets:
Gross Balance	899		1,641
Liabilities:
Gross Balance	802		1,186
Derivatives [Member] | Precious Metals contracts [Member] | Level 3 [Member]
Assets:
Gross Balance	8		30
Liabilities:
Gross Balance	8		30
Derivatives [Member] | Credit contracts [Member]
Assets:
Gross Balance	10,740		14,390
Net Balance	10,740		14,390
Liabilities:
Gross Balance			14,293
Net Balance			14,293
Derivatives [Member] | Credit contracts [Member] | Level 2 [Member]
Assets:
Gross Balance	9,124		12,297
Liabilities:
Gross Balance	10,259		13,553
Derivatives [Member] | Credit contracts [Member] | Level 3 [Member]
Assets:
Gross Balance	1,616		2,093
Liabilities:
Gross Balance	695		740
Derivatives [Member] | Derivatives netting [Member]
Assets:
Netting	(88,604)		(84,996)
Net Balance	(88,604)		(84,996)
Derivatives [Member] | Derivatives [Member]
Liabilities:
Gross Balance			94,986
Netting			(86,546)
Net Balance			8,440
Derivatives [Member] | Derivatives [Member] | Level 1 [Member]
Liabilities:
Gross Balance			111
Derivatives [Member] | Derivatives [Member] | Level 2 [Member]
Liabilities:
Gross Balance			93,631
Derivatives [Member] | Derivatives [Member] | Level 3 [Member]
Liabilities:
Gross Balance			1,244
Derivatives [Member] | Derivatives [Member] | Derivatives netting [Member]
Liabilities:
Netting			(86,546)
Net Balance			(86,546)
Derivatives [Member] | Equity Securities [Member] | Level 2 [Member]
Liabilities:
Gross Balance	835
Securities available-for-sale [Member] | U.S. Treasury, U.S. Government agencies and sponsored enterprises [Member]
Assets:
Gross Balance	52,102		44,609
Net Balance	52,102		44,609
Securities available-for-sale [Member] | U.S. Treasury, U.S. Government agencies and sponsored enterprises [Member] | Level 1 [Member]
Assets:
Gross Balance	35,342		22,467
Securities available-for-sale [Member] | U.S. Treasury, U.S. Government agencies and sponsored enterprises [Member] | Level 2 [Member]
Assets:
Gross Balance	16,760		22,142
Securities available-for-sale [Member] | Obligations of U.S. states and political subdivisions [Member]
Assets:
Gross Balance	681		600
Net Balance	681		600
Securities available-for-sale [Member] | Obligations of U.S. states and political subdivisions [Member] | Level 2 [Member]
Assets:
Gross Balance	681		600
Securities available-for-sale [Member] | Corporate debt securities issued by foreign entities [Member] | Corporate [Member]
Assets:
Gross Balance	1,374		1,235
Net Balance	1,374		1,235
Securities available-for-sale [Member] | Corporate debt securities issued by foreign entities [Member] | Corporate [Member] | Level 2 [Member]
Assets:
Gross Balance	1,374		1,235
Securities available-for-sale [Member] | Corporate debt securities issued by foreign entities [Member] | Government [Member]
Assets:
Gross Balance	5,456		5,335
Net Balance	5,456		5,335
Securities available-for-sale [Member] | Corporate debt securities issued by foreign entities [Member] | Government [Member] | Level 1 [Member]
Assets:
Gross Balance	41		40
Securities available-for-sale [Member] | Corporate debt securities issued by foreign entities [Member] | Government [Member] | Level 2 [Member]
Assets:
Gross Balance	5,415		5,295
Securities available-for-sale [Member] | Corporate debt securities issued by foreign entities [Member] | Equity Securities [Member]
Assets:
Gross Balance	193		140
Net Balance	193		140
Securities available-for-sale [Member] | Corporate debt securities issued by foreign entities [Member] | Equity Securities [Member] | Level 2 [Member]
Assets:
Gross Balance	193		140
Securities available-for-sale [Member] | Asset-backed Securities [Member] | Residential mortgages [Member]
Assets:
Gross Balance	5		5
Net Balance	5		5
Securities available-for-sale [Member] | Asset-backed Securities [Member] | Residential mortgages [Member] | Level 2 [Member]
Assets:
Gross Balance	5		5
Securities available-for-sale [Member] | Asset-backed Securities [Member] | Commercial mortgages [Member]
Assets:
Gross Balance	305		451
Net Balance	305		451
Securities available-for-sale [Member] | Asset-backed Securities [Member] | Commercial mortgages [Member] | Level 2 [Member]
Assets:
Gross Balance	305		451
Securities available-for-sale [Member] | Asset-backed Securities [Member] | Home equity mortgages [Member]
Assets:
Gross Balance	251		270
Net Balance	251		270
Securities available-for-sale [Member] | Asset-backed Securities [Member] | Home equity mortgages [Member] | Level 2 [Member]
Assets:
Gross Balance	251		270
Securities available-for-sale [Member] | Asset-backed Securities [Member] | Student Loans [Member]
Assets:
Gross Balance	9		12
Net Balance	9		12
Securities available-for-sale [Member] | Asset-backed Securities [Member] | Student Loans [Member] | Level 2 [Member]
Assets:
Gross Balance	9		12
Securities available-for-sale [Member] | Asset-backed Securities [Member] | Others [Member]
Assets:
Gross Balance	85		80
Net Balance	85		80
Securities available-for-sale [Member] | Asset-backed Securities [Member] | Others [Member] | Level 2 [Member]
Assets:
Gross Balance	85		80
Securities available-for-sale [Member] | Asset-backed Securities [Member] | Corporate and Other Domestic Debt Securities [Member]
Assets:
Gross Balance	42		544
Net Balance	42		544
Securities available-for-sale [Member] | Asset-backed Securities [Member] | Corporate and Other Domestic Debt Securities [Member] | Level 2 [Member]
Assets:
Gross Balance	42		544
Loans [Member]
Assets:
Gross Balance	446		378
Net Balance	446		378
Loans [Member] | Level 2 [Member]
Assets:
Gross Balance	446		367
Loans [Member] | Level 3 [Member]
Assets:
Gross Balance			11
Intangible [Member]
Assets:
Gross Balance	187		220
Net Balance	187		220
Intangible [Member] | Level 3 [Member]
Assets:
Gross Balance	$ 187		$ 220

[1] The following table summarizes assets and liabilities related to variable interest entities ("VIEs") as of June 30, 2012 and December 31, 2011 which are consolidated on our balance sheet. Assets and liabilities exclude intercompany balances that eliminate in consolidation.