Consolidated Statements of Shareholders' Equity - USD ($) $ in Millions	Total	Common stock:	Additional paid-in capital:	Retained earnings:	Accumulated other comprehensive income (loss):	Treasury stock:
Balance, beginning of period at Dec. 31, 2015		$ 67	$ 1,828	$ 24,007	$ 625	$ (8,819)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options			38
Share-based compensation			41
Net earnings	$ 1,908			1,908
Dividends to shareholders				(511)
Unrealized foreign currency translation gains (losses) during period, net of income taxes					1,602
Unrealized gains (losses) on investment securities during period, net of income taxes and reclassification adjustments					3,134
Unrealized gains (losses) on derivatives during period, net of income taxes					7
Pension liability adjustment during period, net of income taxes					(4)
Purchases of treasury stock						(1,222)
Treasury stock reissued			29			55
Balance, end of period at Sep. 30, 2016	22,785	67	1,936	25,404	5,364	(9,986)
Balance, beginning of period at Dec. 31, 2016	20,482	67	1,976	25,981	2,630	(10,172)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options			33
Share-based compensation			38
Net earnings	2,021			2,021
Dividends to shareholders				(513)
Unrealized foreign currency translation gains (losses) during period, net of income taxes					268
Unrealized gains (losses) on investment securities during period, net of income taxes and reclassification adjustments					632
Unrealized gains (losses) on derivatives during period, net of income taxes					1
Pension liability adjustment during period, net of income taxes					0
Purchases of treasury stock						(1,053)
Treasury stock reissued			30			38
Balance, end of period at Sep. 30, 2017	$ 21,977	$ 67	$ 2,077	$ 27,489	$ 3,531	$ (11,187)