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			17
Share-based compensation			27
Net earnings	1,399			1,399
Dividends to shareholders				(421)
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					160
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					666
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					(25)
Pension liability adjustment during period, net of income taxes					(7)
Purchases of treasury stock						(268)
Treasury stock reissued			24			41
Balance, end of period at Sep. 30, 2011	12,156	66	1,388	14,765	1,550	(5,613)
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			19
Share-based compensation			25
Net earnings	2,285			2,285
Dividends to shareholders				(464)
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					27
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					1,117
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					(4)
Pension liability adjustment during period, net of income taxes					(18)
Purchases of treasury stock						(13)
Treasury stock reissued			21			44
Balance, end of period at Sep. 30, 2012	$ 15,985	$ 66	$ 1,473	$ 16,969	$ 3,087	$ (5,610)