Consolidated Statements Of Equity And Comprehensive Income (USD $) In Millions, unless otherwise specified	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Treasury Shares [Member]	Non-Controlling Interests [Member]
Balance, beginning of year at Dec. 31, 2010		$ 561	$ 1,185	$ 7,436	$ (2,300)	$ (514)	$ 47
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Change in accrued stock compensation costs			(85)
Issuance of shares under stock compensation plans and employee stock purchase plans and related tax impact			(6)
Purchase of subsidiary shares from non-controlling interests			(2)
Net income attributable to the Company	607			607
Dividend equivalents declared (per share amounts: $0.67 in 2012 and $0.64 in 2011)				(7)
Dividends declared – (per share amounts: $0.67 in 2012 and $0.64 in 2011)				(348)
Foreign currency translation adjustments	235				235
Unrealized investment holding losses, net of reclassification adjustments	(4)				(4)
Net changes under benefit plans, net of tax	(9)				(9)
Issuance of shares under stock compensation plans and employee stock purchase plans						213
Purchase of treasury shares						(235)
Net Income attributable to non-controlling interests	(13)						13
Distributions							(4)
Other changes							(3)
Balance, end of period at Jun. 30, 2011	6,780		1,092	7,688	(2,078)	(536)	53
Balance, beginning of year at Dec. 31, 2011	5,940	561	1,156	7,949	(3,188)	(595)	57
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Change in accrued stock compensation costs			(79)
Issuance of shares under stock compensation plans and employee stock purchase plans and related tax impact			(25)
Purchase of subsidiary shares from non-controlling interests			1
Net income attributable to the Company	676			676
Dividend equivalents declared (per share amounts: $0.67 in 2012 and $0.64 in 2011)				(4)
Dividends declared – (per share amounts: $0.67 in 2012 and $0.64 in 2011)				(364)
Foreign currency translation adjustments	(15)				(15)
Unrealized investment holding losses, net of reclassification adjustments	(3)				(3)
Net changes under benefit plans, net of tax	91				91
Issuance of shares under stock compensation plans and employee stock purchase plans						212
Purchase of treasury shares						(100)
Net Income attributable to non-controlling interests	(15)						15
Distributions	(4)						(4)
Other changes							3
Balance, end of period at Jun. 30, 2012	$ 6,344		$ 1,053	$ 8,257	$ (3,115)	$ (483)	$ 71