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Equity - Summary of Shareholders' Equity (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended						6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Jun. 30, 2020	Jun. 30, 2019
Dividends declared per share (usd per share)			$ 0.26	$ 0.24	$ 0.24	$ 0.24
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 2,821	$ 2,967		$ 2,808	$ 2,782		$ 2,967	$ 2,782
Sale of business					(2)
Net income	31	38		139	79		69	218
Other comprehensive income (loss), net	52	(87)		(11)	20
Dividends declared	(47)	(48)		(43)	(44)
Stock incentive plan activity	8	3		13	(2)
Repurchase of common stock		(50)			(25)
Ending balance	2,865	2,821	$ 2,967	2,906	2,808	$ 2,782	2,865	2,906
Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	2	2		2	2		2	2
Ending balance	2	2	2	2	2	2	2	2
Capital in Excess of Par Value
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	2,004	1,991		1,962	1,950		1,991	1,950
Stock incentive plan activity	8	13		13	12
Ending balance	2,012	2,004	1,991	1,975	1,962	1,950	2,012	1,975
Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	1,854	1,866		1,674	1,639		1,866	1,639
Net income	31	38		139	79
Dividends declared	(47)	(48)		(43)	(44)
Ending balance	1,838	1,854	1,866	1,770	1,674	1,639	1,838	1,770
Accumulated Other Comprehensive Income (Loss)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(461)	(375)		(316)	(336)		(375)	(336)
Other comprehensive income (loss), net	52	(86)		(11)	20
Ending balance	(409)	(461)	(375)	(327)	(316)	(336)	(409)	(327)
Treasury Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(587)	(527)		(526)	(487)		(527)	(487)
Stock incentive plan activity		(10)			(14)
Repurchase of common stock		(50)			(25)
Ending balance	(587)	(587)	(527)	(526)	(526)	(487)	(587)	(526)
Non-Controlling Interest
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	9	10		12	14		10	14
Sale of business					(2)
Net income				0
Other comprehensive income (loss), net		(1)
Ending balance	$ 9	$ 9	$ 10	$ 12	$ 12	$ 14	$ 9	$ 12