Computation of EPS (Details) (USD $) In Millions, except Share data in Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Computation of EPS
Net income available to common shareholders	$ 520	$ 268	$ 1,446	$ 1,025
Weighted Average Number of Shares Outstanding, Basic	720,117	704,134	717,373	702,219
Effect of dilutive outstanding equity-based awards	9,872	11,967	10,221	11,063
Weighted Average Number of Shares Outstanding, Diluted	729,989	716,101	727,594	713,282
EPS basic	$ 0.72	$ 0.38	$ 2.02	$ 1.46
EPS diluted	$ 0.71	$ 0.37	$ 1.99	$ 1.44
Anti-dilutive awards	14,016	22,570	14,606	30,141