Goodwill and Other Intangible Assets (Details) (USD $) In Millions	Sep. 30, 2011	Jun. 30, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Dec. 31, 2009
Intangible Assets By Major Class [Line Items]
Goodwill	$ 48,180	$ 48,882	$ 48,854	$ 48,736	$ 48,320	$ 48,357
Mortgage servicing rights	7,833	12,243	13,649	10,305	11,853	15,531
Other intangible assets:
Other intangible assets	3,396		4,039
Purchased Credit Card Relationships [Member]
Other intangible assets:
Other intangible assets	668		897
Other credit card- related intangibles [Member]
Other intangible assets:
Other intangible assets	508		593
Core Deposit Intangibles [Member]
Other intangible assets:
Other intangible assets	662		879
Other intangibles [Member]
Other intangible assets:
Other intangible assets	$ 1,558		$ 1,670