Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Consolidated Statements of Comprehensive Income [Abstract]
Net income	$ 1,366	$ 1,250	$ 4,051	$ 3,845
Other comprehensive (loss) income:
Net unrealized securities (losses) gains, net of tax	(48)	21	(210)	52
Net unrealized derivative gains, net of tax	0	0	0	1
Foreign currency translation adjustments, net of tax	11	81	(262)	(46)
Net unrealized pension and other postretirement benefit gains, net of tax	6	14	60	34
Other comprehensive (loss) income	(31)	116	(412)	41
Comprehensive income	$ 1,335	$ 1,366	$ 3,639	$ 3,886