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			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					27
Unrealized gains (losses) on investment securities during period, net of income taxes and reclassification adjustments					1,117
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)
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			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)