Leases (Lease Income Associated with Operating Leases) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Leases [Abstract]
Fixed payments	$ 4	$ 3	$ 11	$ 11
Variable payments	15	21	33	52
Total lease income under operating leases	$ 19	$ 24	$ 44	$ 63