Consolidated Statements of Shareholders' Equity (USD $) In Millions, unless otherwise specified	Total	Common stock:	Additional paid-in capital:	Retained earnings:	Accumulated other comprehensive income (loss):	Treasury stock:
Balance, beginning of period at Dec. 31, 2010		$ 66	$ 1,320	$ 13,787	$ 753	$ (5,386)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options			12
Share-based compensation			8
Gain (loss) on treasury stock reissued			10
Net earnings	389			389
Dividends to shareholders				(141)
Unrealized foreign currency translation gains (losses) during period, net of income taxes:
Change in unrealized foreign currency translation gains (losses) during period, net of income taxes					(55)
Unrealized gains (losses) on investment securities during period, net of income taxes and reclassification adjustments:
Change in unrealized gains (losses) on investment securities not other-than-temporarily impaired, net of income taxes					(52)
Change in unrealized gains (losses) on other-than-temporarily impaired investment securities, net of income taxes					3
Unrealized gains (losses) on derivatives during period, net of income taxes					(36)
Pension liability adjustment during period, net of income taxes					2
Purchases of treasury stock						(184)
Cost of shares issued						14
Balance, end of period at Mar. 31, 2011	10,510	66	1,350	14,035	615	(5,556)
Balance, beginning of period at Dec. 31, 2011	12,946	66	1,408	15,148	1,965	(5,641)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options			13
Share-based compensation			5
Gain (loss) on treasury stock reissued			7
Net earnings	785			785
Dividends to shareholders				(154)
Unrealized foreign currency translation gains (losses) during period, net of income taxes:
Change in unrealized foreign currency translation gains (losses) during period, net of income taxes					(266)
Unrealized gains (losses) on investment securities during period, net of income taxes and reclassification adjustments:
Change in unrealized gains (losses) on investment securities not other-than-temporarily impaired, net of income taxes					305
Change in unrealized gains (losses) on other-than-temporarily impaired investment securities, net of income taxes					0
Unrealized gains (losses) on derivatives during period, net of income taxes					(8)
Pension liability adjustment during period, net of income taxes					4
Purchases of treasury stock						(10)
Cost of shares issued						16
Balance, end of period at Mar. 31, 2012	$ 13,643	$ 66	$ 1,433	$ 15,779	$ 2,000	$ (5,635)