v3.26.3
Derivative Instruments and Hedging Activities - Pro Forma Impact Of Offsetting Assets (Details) - USD ($)
$ in Millions
Sep. 30, 2026
Dec. 31, 2025
Derivative Asset [Abstract]    
Derivative assets $ 100.2 $ 189.7
Pro forma net presentation, asset, current $ 4.4 $ 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 $ 0.0 $ 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 $ 4.4 $ 69.6
Counterparties with Offsetting Positions or Collateral [Member]    
Derivative Asset [Abstract]    
Derivative assets 95.8 166.7
Pro forma net presentation, asset, total 0.0 46.6
Counterparties without Offsetting Position [Member]    
Derivative Asset [Abstract]    
Derivative assets 4.4 23.0
Pro forma net presentation, asset, current 4.4 21.4
Pro forma net presentation, asset, noncurrent   1.6
Pro forma net presentation, asset, total 4.4 23.0
Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherAssetsCurrent    
Derivative Asset [Abstract]    
Derivative assets 61.0 154.7
Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherAssetsCurrent | Counterparties with Offsetting Positions or Collateral [Member]    
Derivative Asset [Abstract]    
Derivative assets 56.6 133.3
Pro forma net presentation, asset 0.0 31.3
Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherAssetsCurrent | Counterparties without Offsetting Position [Member]    
Derivative Asset [Abstract]    
Derivative assets 4.4 21.4
Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherAssetsNoncurrent    
Derivative Asset [Abstract]    
Derivative assets 39.2 35.0
Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherAssetsNoncurrent | Counterparties with Offsetting Positions or Collateral [Member]    
Derivative Asset [Abstract]    
Derivative assets 39.2 33.4
Pro forma net presentation, asset $ 0.0 15.3
Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherAssetsNoncurrent | Counterparties without Offsetting Position [Member]    
Derivative Asset [Abstract]    
Derivative assets   $ 1.6