Statement of Other Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Statement of Income and Comprehensive Income [Abstract]
Net income	$ 1,339	$ 1,331	$ 2,595	$ 2,508
Other comprehensive income (loss)
Net unrealized securities gains, net of tax	11	91	31	92
Net unrealized derivatives gains, net of tax	0	3	1	7
Foreign currency translation adjustments, net of tax	(199)	(4)	(127)	62
Net unrealized pension and other postretirement benefit gains, net of tax	(14)	(8)	(20)	(5)
Other comprehensive income	(174)	98	(75)	166
Comprehensive income	$ 1,165	$ 1,429	$ 2,520	$ 2,674