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		1	31
Share-based compensation			34
Net earnings	2,866			2,866
Dividends to shareholders ($1.50 per share in 2014, $1.42 per share in 2013, and $1.34 per share in 2012)				(627)
Unrealized foreign currency translation gains (losses) during period, net of income taxes					(651)
Unrealized gains (losses) on investment securities during the period, net of income taxes and reclassification adjustments					1,427
Unrealized gains (losses) on derivatives during period, net of income taxes					(14)
Pension liability adjustment during period, net of income taxes					(12)
Purchases of treasury stock						(118)
Treasury stock reissued			32			63
Balance, end 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		0	50
Share-based compensation			32
Net earnings	3,158			3,158
Dividends to shareholders ($1.50 per share in 2014, $1.42 per share in 2013, and $1.34 per share in 2012)				(660)
Unrealized foreign currency translation gains (losses) during period, net of income taxes					(1,838)
Unrealized gains (losses) on investment securities during the period, net of income taxes and reclassification adjustments					(1,535)
Unrealized gains (losses) on derivatives during period, net of income taxes					(7)
Pension liability adjustment during period, net of income taxes					102
Purchases of treasury stock						(813)
Treasury stock reissued			57			96
Balance, end 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		0	29
Share-based compensation			(3)
Net earnings	2,951			2,951
Dividends to shareholders ($1.50 per share in 2014, $1.42 per share in 2013, and $1.34 per share in 2012)				(680)
Unrealized foreign currency translation gains (losses) during period, net of income taxes					(1,036)
Unrealized gains (losses) on investment securities during the period, net of income taxes and reclassification adjustments					3,637
Unrealized gains (losses) on derivatives during period, net of income taxes					(14)
Pension liability adjustment during period, net of income taxes					(45)
Purchases of treasury stock						(1,210)
Treasury stock reissued			41			57
Balance, end of period at Dec. 31, 2014	$ 18,347	$ 67	$ 1,711	$ 22,156	$ 1,979	$ (7,566)