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			(10)
Issuance of shares under stock compensation plans and employee stock purchase plans and related tax impact in 2016			(62)			225
Net income	$ 970			953			17
Dividend equivalents declared – (per share amounts: $1.06 in 2017 and $0.96 in 2016)				(4)
Dividends declared – (per share amounts: $1.06 in 2017 and $0.96 in 2016)				(500)
Other comprehensive income, 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
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			(10)
Issuance of shares under stock compensation plans and employee stock purchase plans and related tax impact in 2016			(69)			201
Net income	1,085			1,070			15
Dividend equivalents declared – (per share amounts: $1.06 in 2017 and $0.96 in 2016)				(2)
Dividends declared – (per share amounts: $1.06 in 2017 and $0.96 in 2016)				(541)
Other comprehensive income, net of tax	552				552
Purchase of treasury shares						(400)
Deconsolidation of subsidiary							0
Distributions and other changes							(14)
Balance, end of period at Jun. 30, 2017	$ 7,074		$ 763	$ 12,915	$ (4,541)	$ (2,705)	$ 81