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			(129)
Issuance of shares under stock compensation plans and employee stock purchase plans and related tax impact			(6)
Net income attributable to the Company	325			325
Dividend equivalents declared (per share amounts: $0.44 in 2012 and $0.42 in 2011)				(4)
Dividends declared – (per share amounts: $0.44 in 2012 and $0.42 in 2011)				(229)
Foreign currency translation adjustments	171				171
Unrealized investment holding losses, net of reclassification adjustments	(3)				(3)
Net changes under benefit plans, net of tax	(51)				(51)
Issuance of shares under stock compensation plans and employee stock purchase plans						187
Net Income attributable to non-controlling interests	(6)						6
Other changes							5
Balance, end of period at Mar. 31, 2011	6,687		1,050	7,528	(2,183)	(327)	58
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			(118)
Issuance of shares under stock compensation plans and employee stock purchase plans and related tax impact			(20)
Net income attributable to the Company	347			347
Dividend equivalents declared (per share amounts: $0.44 in 2012 and $0.42 in 2011)				(3)
Dividends declared – (per share amounts: $0.44 in 2012 and $0.42 in 2011)				(240)
Foreign currency translation adjustments	162				162
Unrealized investment holding losses, net of reclassification adjustments	(2)				(2)
Net changes under benefit plans, net of tax	5				5
Issuance of shares under stock compensation plans and employee stock purchase plans						184
Net Income attributable to non-controlling interests	(7)						7
Other changes							3
Balance, end of period at Mar. 31, 2012	$ 6,265		$ 1,018	$ 8,053	$ (3,023)	$ (411)	$ 67