Leases - Lease Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Leases [Abstract]
Operating and short-term lease cost	$ 26	$ 67
Lease, Cost [Abstract]
Amortization of right-of-use assets	1	5
Interest on lease liability	0	0
Total finance lease cost	1	5
Total lease cost	$ 27	$ 72