Leases (Narrative) (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Lessee, Lease, Description [Line Items]
Lessor, operating lease assets	$ 400	$ 800
Lessor, accumulated depreciation	$ 200	$ 200
Lease, renewal term	99 years
Minimum
Lessee, Lease, Description [Line Items]
Operating lease, term of contract	1 year
Maximum
Lessee, Lease, Description [Line Items]
Operating lease, term of contract	44 years