Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Consolidated Statements of Comprehensive Income [Abstract]
Net income	$ 1,266	$ 1,477	$ 4,264	$ 4,438
Other comprehensive (loss) income:
Net unrealized securities (losses) gains, net of tax	(7)	(11)	(27)	31
Foreign currency translation adjustments, net of tax	(220)	(167)	(464)	(195)
Net unrealized pension and other postretirement benefit gains, net of tax	7	7	36	48
Other comprehensive (loss) income	(220)	(171)	(455)	(116)
Comprehensive income	$ 1,046	$ 1,306	$ 3,809	$ 4,322