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Hedging Activities and Fair Value Measurements, Other Fair Value Measurements (Details) - USD ($)
$ in Billions
Dec. 31, 2023
Dec. 31, 2022
Carrying Value [Member]    
Financial Liabilities: [Abstract]    
Fixed-rate debt obligations $ 28.0 $ 27.5
Level 2 [Member] | Fair Value [Member]    
Financial Liabilities: [Abstract]    
Fixed-rate debt obligations $ 26.7 $ 24.2