Consolidated Statements of Equity (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, 2012		$ 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)			226
Net income	424			413			11
Dividend equivalents declared - (per share amounts: $0.50 in 2014 and $0.46 in 2013)				(3)
Dividends declared – (per share amounts: $0.50 in 2014 and $0.46 in 2013)				(252)
Other comprehensive loss, net of tax	(72)				(72)
Purchase of treasury shares						(100)
Other changes							(2)
Balance, end of period at Mar. 31, 2013	6,713	561	993	8,786	(3,379)	(321)	73
Balance, beginning of year at Dec. 31, 2013	7,975	561	1,028	9,452	(2,621)	(515)	70
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Change in accrued stock compensation costs			(59)
Issuance of shares under stock compensation plans and employee stock purchase plans and related tax impact			(60)			194
Net income	456			443			13
Dividend equivalents declared - (per share amounts: $0.50 in 2014 and $0.46 in 2013)				(1)
Dividends declared – (per share amounts: $0.50 in 2014 and $0.46 in 2013)				(274)
Other comprehensive loss, net of tax	(87)				(87)
Purchase of treasury shares						(100)
Other changes							(1)
Balance, end of period at Mar. 31, 2014	$ 8,043	$ 561	$ 909	$ 9,620	$ (2,708)	$ (421)	$ 82