Schedule II - Valuation Accounts and Reserves (Details) - SEC Schedule, 12-09, Allowance, Credit Loss - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning balance	$ 28	$ 15	$ 15
Provision for doubtfull accounts	4	19	11
Net deductions and other	1	6	11
Ending balance	$ 31	$ 28	$ 15