Consolidated Statements of Equity (Unaudited) - USD ($) $ in Millions	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Shares	Non-Controlling Interests
Balance, beginning of year at Dec. 31, 2015		$ 561	$ 861	$ 11,302	$ (4,220)	$ (1,991)	$ 89
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Change in accrued stock compensation costs			(36)
Issuance of shares under stock compensation plans and employee stock purchase plans and related tax impact in 2016			(48)			169
Net income	$ 490			481			9
Dividend equivalents declared – (per share amounts: $0.68 in 2017 and $0.62 in 2016)				(1)
Dividends declared – (per share amounts: $0.68 in 2017 and $0.62 in 2016)				(322)
Other comprehensive income, net of tax	123				123
Purchase of treasury shares						(200)
Distributions and other changes							(6)
Balance, end of period at Mar. 31, 2016	6,771		777	11,460	(4,097)	(2,022)	92
Balance, beginning of year at Dec. 31, 2016	6,272	$ 561	842	12,388	(5,093)	(2,506)	80
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Change in accrued stock compensation costs			(43)
Issuance of shares under stock compensation plans and employee stock purchase plans and related tax impact in 2016			(66)			175
Net income	578			569			9
Dividend equivalents declared – (per share amounts: $0.68 in 2017 and $0.62 in 2016)				(1)
Dividends declared – (per share amounts: $0.68 in 2017 and $0.62 in 2016)				(350)
Other comprehensive income, net of tax	256				256
Purchase of treasury shares						(200)
Distributions and other changes							(2)
Balance, end of period at Mar. 31, 2017	$ 6,619		$ 733	$ 12,606	$ (4,837)	$ (2,531)	$ 87