Consolidated statements of comprehensive income (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Net income	$ 784	$ 601	$ 1,495	$ 1,938
Available-for-sale investments:
Unrealized gains (losses), net of taxes	1	(2)	3	(1)
Reclassification of recognized transactions, net of taxes	0	0	0	12
Net actuarial gains (losses) of defined benefit plans:
Adjustment, net of taxes	(3)	(15)	8	(34)
Reclassification of recognized transactions, including actuarial losses associated with the transfer of Japan substitutional pension, net of taxes	128	12	151	35
Prior service cost of defined benefit plans:
Adjustment, net of taxes	0	1	0	3
Change in fair value of derivative instrument, net of taxes	(3)	(1)	(3)	(4)
Total	123	(5)	159	11
Total comprehensive income	$ 907	$ 596	$ 1,654	$ 1,949