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			15
Share-based compensation			18
Net earnings	663			663
Dividends to shareholders				(281)
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					(14)
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					716
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					3
Purchases of treasury stock						(231)
Treasury stock reissued			19			26
Balance, end of period at Jun. 30, 2011	11,452	66	1,372	14,169	1,436	(5,591)
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			15
Share-based compensation			16
Net earnings	1,268			1,268
Dividends to shareholders				(308)
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					(119)
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					327
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					(5)
Pension liability adjustment during period, net of income taxes					3
Purchases of treasury stock						(10)
Treasury stock reissued			14			32
Balance, end of period at Jun. 30, 2012	$ 14,179	$ 66	$ 1,453	$ 16,108	$ 2,171	$ (5,619)