Statement of Changes in Stockholders' Equity (Unaudited) Statement - USD ($) $ in Millions	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Common Stock Held in Treasury	Accumulated Other Comprehensive Income (Loss)	Non-controlling Interest
Beginning balance at Dec. 31, 2017	$ 4,589	$ 6	$ 1,218	$ 20,210	$ (15,562)	$ (1,287)	$ 4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,956			1,956
Common stock issued for stock-based compensation	0		(8)		8
Stock-based compensation expense	31		31
Repurchases of common stock	(1,500)				(1,500)
Dividends declared	(858)			(858)
Pension and other postretirement benefit adjustments	26					26
Currency translation adjustment	(283)					(283)
Ending balance at Sep. 30, 2018	3,546	6	1,241	20,938	(17,054)	(1,589)	4
Beginning balance at Jun. 30, 2018	3,788	6	1,231	20,633	(16,555)	(1,530)	3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	638			638
Common stock issued for stock-based compensation	0		(1)		1
Stock-based compensation expense	11		11
Repurchases of common stock	(500)				(500)
Dividends declared	(333)			(333)
Pension and other postretirement benefit adjustments	8					8
Currency translation adjustment	(67)					(67)
Noncontrolling interest	1						1
Ending balance at Sep. 30, 2018	3,546	6	1,241	20,938	(17,054)	(1,589)	4
Beginning balance at Dec. 31, 2018	3,258	6	1,253	21,217	(17,545)	(1,677)	4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,880			1,880
Common stock issued for stock-based compensation	39		1		38
Stock-based compensation expense	32		32
Repurchases of common stock	(1,125)				(1,125)
Dividends declared	(993)			(993)
Pension and other postretirement benefit adjustments	13					13
Currency translation adjustment	(134)					(134)
Ending balance at Sep. 30, 2019	2,970	6	1,286	22,104	(18,632)	(1,798)	4
Beginning balance at Jun. 30, 2019	3,095	6	1,270	21,788	(18,276)	(1,697)	4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	660			660
Common stock issued for stock-based compensation	25		6		19
Stock-based compensation expense	10		10
Repurchases of common stock	(375)				(375)
Dividends declared	(344)			(344)
Pension and other postretirement benefit adjustments	4					4
Currency translation adjustment	(105)					(105)
Ending balance at Sep. 30, 2019	$ 2,970	$ 6	$ 1,286	$ 22,104	$ (18,632)	$ (1,798)	$ 4