Consolidated Balance Sheet (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Common stock, par value (usd per share)	$ 0.01	$ 0.01
Common stock, authorized (shares)	3,500,000,000	3,500,000,000
Common stock, issued (shares)	1,277,739,777	1,268,036,220
Treasury stock, common shares (shares)	137,366,861	125,786,430
Preferred stock, par value (usd per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (shares)	100,000,000	100,000,000
Preferred stock, issued (shares)	15,826	15,826
Other liabilities, allowance for lending related commitments	$ 128	$ 134
Operations
Held-to-maturity, fair value	19,092	19,443
Other assets	1,755	1,728
Other liabilities, allowance for lending related commitments	128	134
Other liabilities	395	503
Long-term debt, at fair value	$ 329	$ 321