Long-Term Debt And Lease Obligation (Long-Term Debt and Lease Obligation Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Lessee, Lease, Description [Line Items]
Total lease liability	$ 59	$ 52
Lessee, Operating Lease, Term of Contract	5 years
Total lease liability	$ 59	$ 52
Interest Costs Incurred	$ 6
Maximum
Lessee, Lease, Description [Line Items]
Lessee, Finance Lease, Term of Contract	6 years
Minimum [Member]
Lessee, Lease, Description [Line Items]
Lessee, Finance Lease, Term of Contract	3 years