Consolidated Statements of Shareholders' Equity (USD $) In Millions, unless otherwise specified	Total	Common stock:	Additional paid-in capital:	Retained earnings:	Accumulated other comprehensive income (loss):	Treasury stock:
Balance, beginning of period at Dec. 31, 2008		$ 66	$ 1,184	$ 11,306	$ (582)	$ (5,335)
Unrealized foreign currency translation gains (losses) during period, net of income taxes:
Cumulative effect of change in accounting principle, net of income taxes					0
Change in unrealized foreign currency translation gains (losses) during period, net of income taxes					26
Cumulative effect of change in accounting principle, net of income taxes				0
Exercise of stock options			11
Purchases of treasury stock						(10)
Unrealized gains (losses) on investment securities during period, net of income taxes and reclassification adjustments:
Cumulative effect of change in accounting principle, net of income taxes					0
Change in unrealized gains (losses) on investment securities not other-than-temporarily impaired, net of income taxes					587
Change in unrealized gains (losses) on other-than-temporarily impaired investment securities, net of income taxes					(16)
Net earnings	1,497			1,497
Share-based compensation			35
Cost of shares issued						29
Unrealized gains (losses) on derivatives during period, net of income taxes					0
Dividends to shareholders ($1.23 per share in 2011, $1.14 per share in 2010, and $.84 per share in 2009)				(393)
Gain (loss) on treasury stock reissued			(2)
Pension liability adjustment during period, net of income taxes					14
Balance, end of period at Dec. 31, 2009	8,417	66	1,228	12,410	29	(5,316)
Unrealized foreign currency translation gains (losses) during period, net of income taxes:
Cumulative effect of change in accounting principle, net of income taxes					(320)
Change in unrealized foreign currency translation gains (losses) during period, net of income taxes					470
Cumulative effect of change in accounting principle, net of income taxes				(25)
Exercise of stock options			59
Purchases of treasury stock						(121)
Unrealized gains (losses) on investment securities during period, net of income taxes and reclassification adjustments:
Cumulative effect of change in accounting principle, net of income taxes					180
Change in unrealized gains (losses) on investment securities not other-than-temporarily impaired, net of income taxes					478
Change in unrealized gains (losses) on other-than-temporarily impaired investment securities, net of income taxes					13
Net earnings	2,344			2,344
Share-based compensation			37
Cost of shares issued						51
Unrealized gains (losses) on derivatives during period, net of income taxes					33
Dividends to shareholders ($1.23 per share in 2011, $1.14 per share in 2010, and $.84 per share in 2009)				(535)
Gain (loss) on treasury stock reissued			(4)
Pension liability adjustment during period, net of income taxes					(21)
Balance, end of period at Dec. 31, 2010	11,056	66	1,320	14,194	862	(5,386)
Unrealized foreign currency translation gains (losses) during period, net of income taxes:
Cumulative effect of change in accounting principle, net of income taxes					0
Change in unrealized foreign currency translation gains (losses) during period, net of income taxes					183
Cumulative effect of change in accounting principle, net of income taxes				0
Exercise of stock options			21
Purchases of treasury stock						(308)
Unrealized gains (losses) on investment securities during period, net of income taxes and reclassification adjustments:
Cumulative effect of change in accounting principle, net of income taxes					0
Change in unrealized gains (losses) on investment securities not other-than-temporarily impaired, net of income taxes					1,107
Change in unrealized gains (losses) on other-than-temporarily impaired investment securities, net of income taxes					3
Net earnings	1,964			1,964
Share-based compensation			37
Cost of shares issued						53
Unrealized gains (losses) on derivatives during period, net of income taxes					(22)
Dividends to shareholders ($1.23 per share in 2011, $1.14 per share in 2010, and $.84 per share in 2009)				(575)
Gain (loss) on treasury stock reissued			30
Pension liability adjustment during period, net of income taxes					(43)
Balance, end of period at Dec. 31, 2011	$ 13,506	$ 66	$ 1,408	$ 15,583	$ 2,090	$ (5,641)