Consolidated Balance Sheet (unaudited) (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
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)	25,826	25,826
Common stock, par value (dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	3,500,000,000	3,500,000,000
Common stock, issued (shares)	1,320,883,792	1,312,941,113
Treasury stock, common shares (shares)	243,801,160	227,598,128
Operations
Held-to-maturity, fair value	$ 42,231	$ 43,204
Loans, fair value	422	422
Other assets	1,337	1,087
Other liabilities, allowance for lending related commitments	125	118
Other liabilities, fair value,	950	392
Long-term debt, fair value	$ 372	$ 359