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Other Long-term Liabilities - Components of Deferred Revenue (Details) - USD ($)
$ in Millions
Jun. 30, 2024
Dec. 31, 2023
Deferred Revenue Arrangement [Line Items]    
Total deferred revenue $ 118.3 $ 248.8
Contributions in Aid of Construction [Member]    
Deferred Revenue Arrangement [Line Items]    
Total deferred revenue 87.2 86.4
Gas Contract Amendment [Member]    
Deferred Revenue Arrangement [Line Items]    
Total deferred revenue 28.6 29.8
Splitter Agreement [Member]    
Deferred Revenue Arrangement [Line Items]    
Total deferred revenue   129.0
Other Deferred Revenue [Member]    
Deferred Revenue Arrangement [Line Items]    
Total deferred revenue $ 2.5 $ 3.6