Consolidated Statement of 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
Consolidated Statement of Comprehensive Income [Abstract]
Net income	$ 490	$ 513	$ 917	$ 984
Other comprehensive income (loss), net of related taxes:
Foreign currency translation, net of related taxes of $(15), $(15), $34 and $(38), respectively	(299)	112	(153)	472
Change in net unrealized losses on available-for-sale securities, net of reclassification adjustment and net of related taxes of $42, $195, $145 and $243, respectively	75	291	251	358
Change in net unrealized losses on available-for-sale securities designated in fair value hedges, net of related taxes of $(11), $(4), $10 and $6, respectively	(17)	(7)	15	8
Other-than-temporary impairment on held-to-maturity securities related to factors other than credit, net of related taxes of $1, $6, $2 and $8, respectively	0	10	3	13
Change in net unrealized losses on cash flow hedges, net of related taxes of $0, $0, $1 and $1, respectively	3	4	4	3
Change in minimum pension liability, net of related taxes of $0, $19, $1 and $23, respectively	0	(12)	2	(5)
Other comprehensive income (loss)	(238)	398	122	849
Total comprehensive income	$ 252	$ 911	$ 1,039	$ 1,833