v3.26.1
Derivative Instruments and Hedging Activities - Pro Forma Impact Of Offsetting Assets (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Derivative Asset [Abstract]    
Derivative assets $ 139.1 $ 189.7
Pro forma net presentation, asset, current $ 9.7 $ 52.7
Derivative Asset, Current, Statement of Financial Position [Extensible Enumeration] Assets from risk management activities Assets from risk management activities
Pro forma net presentation, asset, noncurrent $ 8.1 $ 16.9
Derivative Asset, Noncurrent, Statement of Financial Position [Extensible Enumeration] Long-term assets from risk management activities Long-term assets from risk management activities
Pro forma net presentation, asset, total $ 17.8 $ 69.6
Counterparties with Offsetting Positions or Collateral [Member]    
Derivative Asset [Abstract]    
Derivative assets 138.6 166.7
Pro forma net presentation, asset, total 17.3 46.6
Counterparties without Offsetting Position [Member]    
Derivative Asset [Abstract]    
Derivative assets 0.5 23.0
Pro forma net presentation, asset, current 0.0 21.4
Pro forma net presentation, asset, noncurrent 0.5 1.6
Pro forma net presentation, asset, total 0.5 23.0
Current Assets from Risk Management Activities [Member]    
Derivative Asset [Abstract]    
Derivative assets 100.6 154.7
Current Assets from Risk Management Activities [Member] | Counterparties with Offsetting Positions or Collateral [Member]    
Derivative Asset [Abstract]    
Derivative assets 100.1 133.3
Pro forma net presentation, asset 9.2 31.3
Current Assets from Risk Management Activities [Member] | Counterparties without Offsetting Position [Member]    
Derivative Asset [Abstract]    
Derivative assets 0.0 21.4
Other Long-term Assets [Member]    
Derivative Asset [Abstract]    
Derivative assets 38.5 35.0
Other Long-term Assets [Member] | Counterparties with Offsetting Positions or Collateral [Member]    
Derivative Asset [Abstract]    
Derivative assets 38.5 33.4
Pro forma net presentation, asset 8.1 15.3
Other Long-term Assets [Member] | Counterparties without Offsetting Position [Member]    
Derivative Asset [Abstract]    
Derivative assets $ 0.5 $ 1.6