Consolidated Statements of Equity - 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, 2014		$ 561	$ 930	$ 10,335	$ (3,847)	$ (925)	$ 79
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Change in accrued stock compensation costs			(19)
Issuance of shares under stock compensation plans and employee stock purchase plans and related tax impact			(69)			235
Net income	$ 924			901			23
Dividend equivalents declared – (per share amounts: $0.96 in 2016 and $0.87 in 2015)				(2)
Dividends declared – (per share amounts: $0.96 in 2016 and $0.87 in 2015)				(466)
Other comprehensive loss, net of tax	(76)				(76)
Purchase of treasury shares						(775)
Deconsolidation of subsidiary							0
Distributions and other changes							(13)
Balance, end of period at Jun. 30, 2015	6,872		842	10,768	(3,923)	(1,465)	89
Balance, beginning of year at Dec. 31, 2015	6,602	$ 561	861	11,302	(4,220)	(1,991)	89
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Change in accrued stock compensation costs			(10)
Issuance of shares under stock compensation plans and employee stock purchase plans and related tax impact			(62)			225
Net income	970			953			17
Dividend equivalents declared – (per share amounts: $0.96 in 2016 and $0.87 in 2015)				(4)
Dividends declared – (per share amounts: $0.96 in 2016 and $0.87 in 2015)				(500)
Other comprehensive loss, net of tax	(81)				(81)
Purchase of treasury shares						(410)
Deconsolidation of subsidiary							(14)
Distributions and other changes							(11)
Balance, end of period at Jun. 30, 2016	$ 6,705		$ 789	$ 11,751	$ (4,301)	$ (2,176)	$ 81