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			24
Share-based compensation			17
Net earnings	$ 1,236			1,236
Dividends to shareholders				(340)
Unrealized foreign currency translation gains (losses) during period, net of income taxes					(184)
Unrealized gains (losses) on investment securities during period, net of income taxes and reclassification adjustments					(1,288)
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						(848)
Treasury stock reissued			20			34
Balance, end of period at Jun. 30, 2015	17,018	67	1,772	23,052	507	(8,380)
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			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)