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Long-Term Debt And Lease Obligation (Long-term Debt and Lease Obligation) (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Long-Term Debt and Lease Obligation [Abstract] |  |  |
Finance Lease, Right-of-Use Asset, Amortization | $ 14 | $ 14 | $ 15
Operating Lease, Expense | 3 | 5 | 4
Total Finance and Operating Lease Cost | 17 | 19 | 19
Finance Lease, Principal Payments | $ 16 | $ 15 | $ 15
Finance Lease, Weighted Average Discount Rate, Percent | 4.35% | 3.20% | 2.46%
Finance Lease, Weighted Average Remaining Lease Term | 3 years 10 months 20 days | 3 years 5 months 26 days | 3 years 5 months 12 days
Operating Lease, Payments | $ 3 | $ 4 | $ 4
Operating Lease, Weighted Average Discount Rate, Percent | 4.66% | 3.44% | 2.86%
Operating Lease, Weighted Average Remaining Lease Term | 4 years 3 months 18 days | 4 years 6 months 10 days | 4 years 4 months 13 days

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- Definition Amount of cash outflow for principal payment on finance lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (g)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147478964/842-20-50-4 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 5 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479041/842-20-45-5 + Details
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- Definition Amount of amortization expense attributable to right-of-use asset from finance lease. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 53 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479589/842-20-55-53 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 4 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479041/842-20-45-4 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147478964/842-20-50-4 + Details
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- Definition Amount of operating lease expense. Excludes sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 4 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479041/842-20-45-4 + Details
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