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, 2013		$ 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: $0.56 in 2015 and $0.50 in 2014)				(1)
Dividends declared – (per share amounts: $0.56 in 2015 and $0.50 in 2014)				(274)
Other comprehensive income (loss), net of tax	(87)				(87)
Purchase of treasury shares						(100)
Distributions							0
Other changes							(1)
Balance, end of period at Mar. 31, 2014	8,043		909	9,620	(2,708)	(421)	82
Balance, beginning of year at Dec. 31, 2014	7,133	561	930	10,335	(3,847)	(925)	79
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Change in accrued stock compensation costs			(40)
Issuance of shares under stock compensation plans and employee stock purchase plans and related tax impact			(53)			174
Net income	495			482			13
Dividend equivalents declared - (per share amounts: $0.56 in 2015 and $0.50 in 2014)				(1)
Dividends declared – (per share amounts: $0.56 in 2015 and $0.50 in 2014)				(301)
Other comprehensive income (loss), net of tax	(243)				(243)
Purchase of treasury shares						(300)
Distributions							(1)
Other changes							0
Balance, end of period at Mar. 31, 2015	$ 6,863		$ 837	$ 10,515	$ (4,090)	$ (1,051)	$ 91