Derivatives and Hedging Activities (Details 5) (USD $) In Millions	Jun. 30, 2011	Dec. 31, 2010
OTC Derivatives [Abstract]
OTC Derivative Assets	$ 68,646	$ 65,692
Gross Fair Value of Derivative Asset Contracts	758,955	804,163
OTC Derivative Liabilities	44,615	51,936
Gross Fair Value of Derivative Liability Contracts	645,676	691,003
0-12 Months [Member] | Interest Rate Contract [Member]
OTC Derivatives [Abstract]
OTC Derivative Assets	7,590	7,137
OTC Derivative Liabilities	3,790	4,470
1-5 Years [Member] | Interest Rate Contract [Member]
OTC Derivatives [Abstract]
OTC Derivative Assets	28,596	34,384
OTC Derivative Liabilities	14,317	14,072
5 Years or Greater [Member] | Interest Rate Contract [Member]
OTC Derivatives [Abstract]
OTC Derivative Assets	62,772	60,750
OTC Derivative Liabilities	18,302	19,760
Interest Rate Contract [Member]
OTC Derivatives [Abstract]
OTC Derivative Assets	98,958	102,271
OTC Derivative Liabilities	36,409	38,302
0-12 Months [Member] | Credit Risk Contract [Member]
OTC Derivatives [Abstract]
OTC Derivative Assets	2,289	2,777
OTC Derivative Liabilities	1,220	1,024
1-5 Years [Member] | Credit Risk Contract [Member]
OTC Derivatives [Abstract]
OTC Derivative Assets	14,784	16,145
OTC Derivative Liabilities	5,056	4,862
5 Years or Greater [Member] | Credit Risk Contract [Member]
OTC Derivatives [Abstract]
OTC Derivative Assets	12,068	13,525
OTC Derivative Liabilities	3,152	3,816
Credit Risk Contract [Member]
OTC Derivatives [Abstract]
OTC Derivative Assets	29,141	32,447
OTC Derivative Liabilities	9,428	9,702
0-12 Months [Member] | Foreign Exchange Contract [Member]
OTC Derivatives [Abstract]
OTC Derivative Assets	9,400	9,968
OTC Derivative Liabilities	8,696	8,036
1-5 Years [Member] | Foreign Exchange Contract [Member]
OTC Derivatives [Abstract]
OTC Derivative Assets	12,381	10,696
OTC Derivative Liabilities	5,121	5,219
5 Years or Greater [Member] | Foreign Exchange Contract [Member]
OTC Derivatives [Abstract]
OTC Derivative Assets	14,266	14,868
OTC Derivative Liabilities	5,290	4,986
Foreign Exchange Contract [Member]
OTC Derivatives [Abstract]
OTC Derivative Assets	36,047	35,532
OTC Derivative Liabilities	19,107	18,241
0-12 Months [Member] | Commodity Contract [Member]
OTC Derivatives [Abstract]
OTC Derivative Assets	5,708	5,664
OTC Derivative Liabilities	5,087	7,279
1-5 Years [Member] | Commodity Contract [Member]
OTC Derivatives [Abstract]
OTC Derivative Assets	5,439	5,996
OTC Derivative Liabilities	6,565	7,838
5 Years or Greater [Member] | Commodity Contract [Member]
OTC Derivatives [Abstract]
OTC Derivative Assets	500	248
OTC Derivative Liabilities	1,847	2,528
Commodity Contract [Member]
OTC Derivatives [Abstract]
OTC Derivative Assets	11,647	11,908
OTC Derivative Liabilities	13,499	17,645
0-12 Months [Member] | Equity Contract [Member]
OTC Derivatives [Abstract]
OTC Derivative Assets	5,312	4,795
OTC Derivative Liabilities	3,350	3,962
1-5 Years [Member] | Equity Contract [Member]
OTC Derivatives [Abstract]
OTC Derivative Assets	13,023	10,942
OTC Derivative Liabilities	4,644	4,977
5 Years or Greater [Member] | Equity Contract [Member]
OTC Derivatives [Abstract]
OTC Derivative Assets	6,899	7,037
OTC Derivative Liabilities	3,312	3,750
Equity Contract [Member]
OTC Derivatives [Abstract]
OTC Derivative Assets	25,234	22,774
OTC Derivative Liabilities	11,306	12,689
Derivatives Net of Counterparty Netting within Tenor Categories [Member]
OTC Derivatives [Abstract]
OTC Derivative Assets	187,696	191,405
OTC Derivative Liabilities	76,418	83,052
0-12 Months [Member]
OTC Derivatives [Abstract]
OTC Derivative Assets	27,803	27,404
OTC Derivative Liabilities	19,647	21,834
0-12 Months [Member] | Netting Across Product Types [Member]
OTC Derivatives [Abstract]
OTC Derivative Assets	(2,496)	(2,937)
OTC Derivative Liabilities	(2,496)	(2,937)
1-5 Years [Member]
OTC Derivatives [Abstract]
OTC Derivative Assets	68,103	72,650
OTC Derivative Liabilities	29,583	31,455
1-5 Years [Member] | Netting Across Product Types [Member]
OTC Derivatives [Abstract]
OTC Derivative Assets	(6,120)	(5,513)
OTC Derivative Liabilities	(6,120)	(5,513)
5 Years or Greater [Member]
OTC Derivatives [Abstract]
OTC Derivative Assets	91,790	91,351
OTC Derivative Liabilities	27,188	29,763
5 Years or Greater [Member] | Netting Across Product Types [Member]
OTC Derivatives [Abstract]
OTC Derivative Assets	(4,715)	(5,077)
OTC Derivative Liabilities	(4,715)	(5,077)
Netting Across Product Types [Member]
OTC Derivatives [Abstract]
OTC Derivative Assets	(13,331)	(13,527)
OTC Derivative Liabilities	(13,331)	(13,527)
Cross Maturity Netting [Member]
OTC Derivatives [Abstract]
OTC Derivative Assets	(16,143)	(15,396)
OTC Derivative Liabilities	(16,143)	(15,396)
Cash collateral netting [Member]
OTC Derivatives [Abstract]
Gross Fair Value of Derivative Asset Contracts	(102,907)	(110,317)
Gross Fair Value of Derivative Liability Contracts	$ (15,660)	$ (15,720)