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Other Commitments and Contingencies Other Commitments and Contingencies (Tables)
 12 Months Ended
Dec. 31, 2024
Long-term Purchase Commitment [Line Items]  
Long-term Purchase Commitment [Table Text Block]
The total purchase obligations for natural gas, electric and propane supplies are as follows:
Year20252026-20272028-2029Beyond 2029Total
(in millions)
Purchase Obligations$90.2 $103.6 $73.7 $119.4 $386.9