Other Non-Operating Income, Net (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Other Income and Expenses [Abstract]
Interest income	$ 7	$ 5	$ 4
Income from joint ventures	2	3	5
Other income (expense) - net	(14)	(12)	4
Total other non-operating (expense) income, net	$ (5)	$ (4)	$ 13