Long-Term Debt And Lease Obligation Long-term Debt and Lease Obligation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Long-Term Debt and Lease Obligation [Abstract]
Finance Lease, Right-of-Use Asset, Amortization	$ 14	$ 15	$ 15
Operating Lease, Expense	5	4	4
Total Finance and Operating Lease Cost	19	19	19
Finance Lease, Principal Payments	$ 15	$ 15	$ 15
Finance Lease, Weighted Average Discount Rate, Percent	3.20%	2.46%	2.62%
Finance Lease, Weighted Average Remaining Lease Term	3 years 5 months 26 days	3 years 5 months 12 days	3 years 8 months 1 day
Operating Lease, Payments	$ 4	$ 4	$ 8
Operating Lease, Weighted Average Discount Rate, Percent	3.44%	2.86%	3.65%
Operating Lease, Weighted Average Remaining Lease Term	4 years 6 months 10 days	4 years 4 months 13 days	4 years 10 months 2 days