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			25
Share-based compensation			34
Net earnings	$ 1,279			1,279
Dividends to shareholders				(342)
Unrealized foreign currency translation gains (losses) during period, net of income taxes					1,349
Unrealized gains (losses) on investment securities during period, net of income taxes and reclassification adjustments					3,455
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						(1,014)
Treasury stock reissued			18			35
Balance, end of period at Jun. 30, 2016	22,550	67	1,905	24,944	5,432	(9,798)
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			28
Share-based compensation			24
Net earnings	1,305			1,305
Dividends to shareholders				(344)
Unrealized foreign currency translation gains (losses) during period, net of income taxes					403
Unrealized gains (losses) on investment securities during period, net of income taxes and reclassification adjustments					368
Unrealized gains (losses) on derivatives during period, net of income taxes					1
Pension liability adjustment during period, net of income taxes					(1)
Purchases of treasury stock						(813)
Treasury stock reissued			20			30
Balance, end of period at Jun. 30, 2017	$ 21,503	$ 67	$ 2,048	$ 26,942	$ 3,401	$ (10,955)