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, 2013		$ 67	$ 1,644	$ 19,885	$ (563)	$ (6,413)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options			14
Share-based compensation			17
Net earnings	$ 1,542			1,542
Dividends to shareholders				(338)
Unrealized foreign currency translation gains (losses) during period, net of income taxes					289
Unrealized gains (losses) on investment securities during period, net of income taxes and reclassification adjustments					1,880
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						(522)
Treasury stock reissued			23			33
Balance, end of period at Jun. 30, 2014	17,558	67	1,698	21,089	1,606	(6,902)
Balance, beginning of period at Dec. 31, 2014	18,347	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)