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, 2011		$ 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					(119)
Unrealized gains (losses) on investment securities during period, net of income taxes and reclassification adjustments					327
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)
Balance, beginning of period at Dec. 31, 2012	15,978	67	1,505	17,387	2,715	(5,696)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options			19
Share-based compensation			12
Net earnings	1,781			1,781
Dividends to shareholders				(327)
Unrealized foreign currency translation gains (losses) during period, net of income taxes					(786)
Unrealized gains (losses) on investment securities during period, net of income taxes and reclassification adjustments					(2,768)
Unrealized gains (losses) on derivatives during period, net of income taxes					(6)
Pension liability adjustment during period, net of income taxes					5
Purchases of treasury stock						(287)
Treasury stock reissued			26			49
Balance, end of period at Jun. 30, 2013	$ 13,696	$ 67	$ 1,562	$ 18,841	$ (840)	$ (5,934)