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, 2012		$ 67	$ 1,505	$ 17,387	$ 2,715	$ (5,696)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options			38
Share-based compensation			22
Net earnings	2,483			2,483
Dividends to shareholders				(490)
Unrealized foreign currency translation gains (losses) during period, net of income taxes					(751)
Unrealized gains (losses) on investment securities during period, net of income taxes and reclassification adjustments					(2,427)
Unrealized gains (losses) on derivatives during period, net of income taxes					(3)
Pension liability adjustment during period, net of income taxes					5
Purchases of treasury stock						(307)
Treasury stock reissued			40			70
Balance, end of period at Sep. 30, 2013	14,658	67	1,605	19,380	(461)	(5,933)
Balance, beginning of period at Dec. 31, 2013	14,620	67	1,644	19,885	(563)	(6,413)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options			24
Share-based compensation			27
Net earnings	2,248			2,248
Dividends to shareholders				(505)
Unrealized foreign currency translation gains (losses) during period, net of income taxes					(300)
Unrealized gains (losses) on investment securities during period, net of income taxes and reclassification adjustments					2,367
Unrealized gains (losses) on derivatives during period, net of income taxes					(5)
Pension liability adjustment during period, net of income taxes					1
Purchases of treasury stock						(698)
Treasury stock reissued			31			43
Balance, end of period at Sep. 30, 2014	$ 17,853	$ 67	$ 1,726	$ 21,628	$ 1,500	$ (7,068)