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, 2016		$ 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			(66)			175
Cumulative effect of adoption of new revenue recognition standard and other new accounting standards				0	0
Cumulative effect of adoption of new revenue recognition standard and other new accounting standards | Accounting Standards Update 2014-09				0
Net income	$ 578			569			9
Dividend equivalents declared – (per share amounts: $0.75 in 2018 and $0.68 in 2017)				(1)
Dividends declared – (per share amounts: $0.75 in 2018 and $0.68 in 2017)				(350)
Other comprehensive income, net of tax	256				256
Purchase of treasury shares						(200)
Deconsolidation of subsidiary							(2)
Distributions and other changes							0
Balance, end of period at Mar. 31, 2017	6,619		733	12,606	(4,837)	(2,531)	87
Balance, beginning of year at Dec. 31, 2017	7,442	$ 561	784	13,140	(4,043)	(3,083)	83
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Change in accrued stock compensation costs			(75)
Issuance of shares under stock compensation plans and employee stock purchase plans			(27)			123
Cumulative effect of adoption of new revenue recognition standard and other new accounting standards				0	(14)
Cumulative effect of adoption of new revenue recognition standard and other new accounting standards | Accounting Standards Update 2014-09				364
Net income	696			690			6
Net income | Accounting Standards Update 2014-09	696
Dividend equivalents declared – (per share amounts: $0.75 in 2018 and $0.68 in 2017)				(1)
Dividends declared – (per share amounts: $0.75 in 2018 and $0.68 in 2017)				(381)
Other comprehensive income, net of tax	152				152
Purchase of treasury shares						(250)
Deconsolidation of subsidiary							0
Distributions and other changes							(8)
Balance, end of period at Mar. 31, 2018	8,021		$ 682	$ 13,812	$ (3,905)	$ (3,210)	$ 81
Balance, end of period (Accounting Standards Update 2014-09) at Mar. 31, 2018	$ 8,021