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Other Long-term Liabilities - Components of Deferred Revenue (Details) - USD ($) $ in Millions | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Deferred Revenue Arrangement [Line Items] |  |
Total deferred revenue | $ 119.3 | $ 248.8
Contributions in Aid of Construction [Member] |  |
Deferred Revenue Arrangement [Line Items] |  |
Total deferred revenue | 89.3 | 86.4
Gas Contract Amendment [Member] |  |
Deferred Revenue Arrangement [Line Items] |  |
Total deferred revenue | 28.0 | 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 | $ 2.0 | $ 3.6

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