Other Expense, Net (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Other Income and Expenses [Abstract]
Non-service related net periodic benefit cost	$ 8	$ 7	$ 19	$ 15
Interest income	(1)	(5)	(5)	(20)
Foreign currency (gains) losses, net	(5)	7	(12)	8
Net loss from asset sales	2	2	6	9
Deferred compensation	4	1	1	16
Other, net	0	(4)	(9)	(2)
Total	$ 8	$ 8	$ 0	$ 26