Condensed Consolidated Statements of Equity (Unaudited) - USD ($) $ in Millions	Total	Common Stock [Member]	Treasury Stock [Member]	Capital in Excess of Par Value [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings [Member]	Noncontrolling Interests [Member]
Beginning balance at Dec. 31, 2016	$ 7,486	$ 1	$ (2,443)	$ 6,516	$ (119)	$ 2,213	$ 1,318
Cumulative effect adjustment from change in accounting principle (Accounting Standards Update 2016-09 [Member]) at Dec. 31, 2016				3		(2)	(1)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,218					1,027	191
Currency translation adjustment	65				73		(8)
Exercise of stock options	16			13			3
Stock-based compensation	18			15			3
Repurchase of common stock	(225)		(225)
Dividends declared	(1,781)					(1,156)	(625)
Ending balance at Jun. 30, 2017	6,797	1	(2,668)	6,547	(46)	2,082	881
Beginning balance at Dec. 31, 2017	7,627	1	(2,818)	6,580	14	2,709	1,141
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	2,292					2,012	280
Currency translation adjustment	(63)				(58)		(5)
Exercise of stock options	73			66			7
Stock-based compensation	16			14			2
Repurchase of common stock	(179)		(179)
Dividends declared	(1,804)					(1,183)	(621)
Ending balance at Jun. 30, 2018	$ 7,962	$ 1	$ (2,997)	$ 6,660	$ (44)	$ 3,538	$ 804