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, 2011		$ 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: $0.46 in 2013 and $0.44 in 2012)				(3)
Dividends declared – (per share amounts: $0.46 in 2013 and $0.44 in 2012)				(240)
Other comprehensive income (loss), net of tax	165				165
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
Balance, beginning of year at Dec. 31, 2012	6,606	561	1,107	8,628	(3,307)	(447)	64
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Change in accrued stock compensation costs			(89)
Issuance of shares under stock compensation plans and employee stock purchase plans and related tax impact			(25)
Net income attributable to the Company	413			413
Dividend equivalents declared (per share amounts: $0.46 in 2013 and $0.44 in 2012)				(3)
Dividends declared – (per share amounts: $0.46 in 2013 and $0.44 in 2012)				(252)
Other comprehensive income (loss), net of tax	(72)				(72)
Issuance of shares under stock compensation plans and employee stock purchase plans						226
Purchase of treasury shares						(100)
Net Income attributable to non-controlling interests	(11)						11
Other changes							(2)
Balance, end of period at Mar. 31, 2013	$ 6,713		$ 993	$ 8,786	$ (3,379)	$ (321)	$ 73