Leases (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Lessee, Lease, Description [Line Items]
Leases, Renewal Term			5 years
Operating lease expense	$ 1	$ 1	$ 2	$ 2
Operating lease, impairment loss	$ 11		$ 11
Maximum [Member]
Lessee, Lease, Description [Line Items]
Leases, Remaining Lease Term Years			13 years
Minimum [Member]
Lessee, Lease, Description [Line Items]
Leases, Remaining Lease Term Years			1 year