Goodwill and Other Intangible Assets - Other Intangible Assets (Details 6) (USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Dec. 31, 2010
Components of credit card relationships, core deposits and other intangible assets [Abstract]
Components of credit card relationships, core deposits and other intangible assets , Net Carrying Value	$ 3,396		$ 3,396		$ 4,039
Increase (Decrease) In Other Intangible Assets			(643)
Amortization of intangibles	212	218	641	696
Indefinite-Lived Intangible Assets (Excluding Goodwill)	600		600
Purchased Credit Card Relationships [Member]
Components of credit card relationships, core deposits and other intangible assets [Abstract]
Components of credit card relationships, core deposits and other intangible assets , Gross amount	3,823		3,823		5,789
Components of credit card relationships, core deposits and other intangible assets , Accumulated amortization	3,155		3,155		4,892
Components of credit card relationships, core deposits and other intangible assets , Net Carrying Value	668		668		897
Amortization of intangibles	69	80	226	274
Other credit card- related intangibles [Member]
Components of credit card relationships, core deposits and other intangible assets [Abstract]
Components of credit card relationships, core deposits and other intangible assets , Gross amount	838		838		907
Components of credit card relationships, core deposits and other intangible assets , Accumulated amortization	330		330		314
Components of credit card relationships, core deposits and other intangible assets , Net Carrying Value	508		508		593
Amortization of intangibles	27	26	80	78
Core Deposit Intangibles [Member]
Components of credit card relationships, core deposits and other intangible assets [Abstract]
Components of credit card relationships, core deposits and other intangible assets , Gross amount	4,132		4,132		4,280
Components of credit card relationships, core deposits and other intangible assets , Accumulated amortization	3,470		3,470		3,401
Components of credit card relationships, core deposits and other intangible assets , Net Carrying Value	662		662		879
Other intangibles [Member]
Components of credit card relationships, core deposits and other intangible assets [Abstract]
Components of credit card relationships, core deposits and other intangible assets , Gross amount	2,457		2,457		2,515
Components of credit card relationships, core deposits and other intangible assets , Accumulated amortization	899		899		845
Components of credit card relationships, core deposits and other intangible assets , Net Carrying Value	$ 1,558		$ 1,558		$ 1,670