Leases (Narrative) (Details) - USD ($) $ in Millions	4 Months Ended	8 Months Ended	12 Months Ended
	Apr. 30, 2021	Dec. 31, 2021	Dec. 31, 2023	Dec. 31, 2022
Leases [Line Items]
Option to terminate leases, Lessee			1 year
Retained earnings (deficit)			$ 884	$ 855
Option to terminate leases, Lessor			1 year
Lease revenue	$ 21	$ 42	$ 62	$ 63
Minimum [Member]
Leases [Line Items]
Operating and finance lease terms, Lessee			1 year
Operator lease terms, Lessor			1 year
Maximum [Member]
Leases [Line Items]
Operating and finance lease terms, Lessee			83 years
Operator lease terms, Lessor			62 years