Other Expense (Income), Net (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Other Income and Expenses [Abstract]
Non-service related net periodic benefit cost	$ 3	$ 5	$ 6	$ 11
Interest income	(1)	0	(1)	(4)
Foreign currency losses (gains), net	1	(7)	3	(7)
Net loss from asset sales	1	2	4	4
Deferred compensation	4	7	6	(3)
Other, net	0	9	(6)	(9)
Other expense (income), net	$ 8	$ 16	$ 12	$ (8)