Statement of Changes in Stockholders' Equity - USD ($) $ in Millions	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Common Stock Held in Treasury	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interest
Beginning balance at Dec. 31, 2015	$ 5,228	$ 6	$ 1,135	$ 18,316	$ (12,729)	$ (1,504)	$ 4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	2,035			2,035
Common stock issued for share-based compensation	73		(18)		91
Stock-based compensation expense	39		39
Tax benefits related to stock options	29		29
Tax benefits related to defined contribution plans	3		3
Repurchases of common stock	(2,000)				(2,000)
Dividends declared	(846)			(846)
Pension and other postretirement benefit adjustments	(26)					(26)
Currency translation adjustments	(277)					(277)
Noncontrolling interest	1						1
Ending balance at Dec. 31, 2016	4,259	6	1,188	19,505	(14,638)	(1,807)	5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,687			1,687
Common stock issued for share-based compensation	72		(4)		76
Stock-based compensation expense	36		36
Repurchases of common stock	(1,000)				(1,000)
Dividends declared	(982)			(982)
Pension and other postretirement benefit adjustments	114					114
Currency translation adjustments	406					406
Noncontrolling interest	(3)		(2)				(1)
Ending balance at Dec. 31, 2017	4,589	6	1,218	20,210	(15,562)	(1,287)	4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adoption of new accounting guidance	(415)			(370)		(45)
Net income	2,563			2,563
Common stock issued for share-based compensation	12		(5)		17
Stock-based compensation expense	40		40
Repurchases of common stock	(2,000)				(2,000)
Dividends declared	(1,186)			(1,186)
Pension and other postretirement benefit adjustments	(17)					(17)
Currency translation adjustments	(328)					(328)
Ending balance at Dec. 31, 2018	$ 3,258	$ 6	$ 1,253	$ 21,217	$ (17,545)	$ (1,677)	$ 4