Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021		Dec. 31, 2020	Dec. 31, 2019
Statement Of Cash Flows [Abstract]
Cash paid for interest, capitalized interest	$ 3		$ 5	$ 5
Restricted cash and equivalents	$ 24	[1]	0	0
Financing leases			$ 3	4
Operating leases				$ 8

[1] At December 31 2020, 2019 and 2018 there were no restricted cash and equivalent balances.