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Long-Term Debt (Amounts Outstanding Related To Commercial Paper Program) (Details) - USD ($)
Dec. 31, 2021
Dec. 31, 2020
Debt Disclosure [Abstract]    
Total program authorized $ 1,200,000,000 $ 1,200,000,000
Commercial paper outstanding (classified as long-term debt) 0 0
Letters of credit issued under the credit facility 0 0
Total program usage $ 0 $ 0