Leases (Lease Income Associated with Operating Leases) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Leases [Abstract]
Fixed payments	$ 3	$ 4	$ 7	$ 8
Variable payments	7	15	18	31
Total lease income under operating leases	$ 10	$ 19	$ 25	$ 39