Goodwill and Other Intangible Assets (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Intangible Assets By Major Class [Line Items]
Goodwill	$ 48,081	$ 48,175	$ 48,188	$ 48,854
Mortgage servicing rights	9,614	7,614	7,223	13,649
Other intangible assets:
Other intangible assets	1,618	2,235	3,207
Purchased credit card relationships [Member]
Other intangible assets:
Other intangible assets	131	295	602
Other credit card- related intangibles [Member]
Other intangible assets:
Other intangible assets	173	229	488
Core deposit intangibles [Member]
Other intangible assets:
Other intangible assets	159	355	594
Other intangibles [Member]
Other intangible assets:
Other intangible assets	$ 1,155	$ 1,356	$ 1,523