v3.25.2
Intangible Assets - Schedule of Finite-Lived Intangible Assets (Details) - USD ($)
$ in Millions
Jun. 30, 2025
Dec. 31, 2024
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount $ 33.3 $ 33.3
Accumulated Amortization 8.2 7.5
Net $ 25.1 25.8
Permits    
Finite-Lived Intangible Assets [Line Items]    
Weighted - Average Remaining Amortization Years 17 years  
Gross Carrying Amount $ 31.7 31.7
Accumulated Amortization 7.9 7.3
Net $ 23.8 24.4
Other    
Finite-Lived Intangible Assets [Line Items]    
Weighted - Average Remaining Amortization Years 25 years  
Gross Carrying Amount $ 1.6 1.6
Accumulated Amortization 0.3 0.2
Net $ 1.3 $ 1.4