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, 2014		$ 67	$ 1,711	$ 22,156	$ 1,979	$ (7,566)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options			41
Share-based compensation			27
Net earnings	$ 1,803			1,803
Dividends to shareholders				(508)
Unrealized foreign currency translation gains (losses) during period, net of income taxes					8
Unrealized gains (losses) on investment securities during period, net of income taxes and reclassification adjustments					(1,458)
Unrealized gains (losses) on derivatives during period, net of income taxes					(2)
Pension liability adjustment during period, net of income taxes					1
Purchases of treasury stock						(1,081)
Treasury stock reissued			28			49
Balance, end of period at Sep. 30, 2015	17,255	67	1,807	23,451	528	(8,598)
Balance, beginning of period at Dec. 31, 2015	17,708	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)