Goodwill and Other Intangible Assets - by Business Segment (Details 1) (USD $) In Millions, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011	Mar. 31, 2011	Dec. 31, 2010
Goodwill [Line Items]
Total goodwill	$ 48,208	$ 48,188	$ 48,856	$ 48,854
Investment Bank
Goodwill [Line Items]
Total goodwill	5,275	5,276
Retail Financial Services
Goodwill [Line Items]
Total goodwill	16,484	16,489
Card Services
Goodwill [Line Items]
Total goodwill	14,530	14,507
Commercial Banking
Goodwill [Line Items]
Total goodwill	2,863	2,864
Treasury & Securities Services
Goodwill [Line Items]
Total goodwill	1,669	1,668
Asset Management [Member]
Goodwill [Line Items]
Total goodwill	7,010	7,007
Corporate/Private Equity
Goodwill [Line Items]
Total goodwill	$ 377	$ 377