Leases Supplemental Lease Disclosures (Details) - USD ($) $ in Millions	1 Months Ended	11 Months Ended	12 Months Ended
	Dec. 31, 2019	Dec. 13, 2019	Dec. 31, 2021	Dec. 31, 2020
Leases [Abstract]
Operating Lease, Payments	$ 5	$ 131	$ 89	$ 101
Finance Lease, Interest Payment on Liability	0	4	5	5
Finance Lease, Principal Payments	1	8	13	9
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	2	59	23	37
Sale and Leaseback Transaction, Gain (Loss), Net	$ 0	$ 34	$ 0	$ 0
Operating Lease, Weighted Average Remaining Lease Term	7 years 9 months 18 days		8 years 10 months 24 days	8 years 1 month 6 days
Finance Lease, Weighted Average Remaining Lease Term	6 years 8 months 12 days		4 years 9 months 18 days	5 years 10 months 24 days
Operating Lease, Weighted Average Discount Rate, Percent	9.20%		9.60%	9.60%
Finance Lease, Weighted Average Discount Rate, Percent	9.10%		8.90%	9.10%