v3.26.1
Derivative Instruments - Derivatives Gains and Losses (Details) - Derivatives not designated as hedging instruments: - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Derivative Instruments, Gain (Loss) [Line Items]        
Total gains (losses) $ 3.9 $ (3.9) $ (59.9) $ 9.1
Commodity derivatives        
Derivative Instruments, Gain (Loss) [Line Items]        
Gains (losses) on derivatives 2.0 (3.3) (63.7) 12.0
Gain (loss) on derivatives not designated as hedging instruments 22.4 (6.3) (1.0) (4.7)
Interest Rate Swap        
Derivative Instruments, Gain (Loss) [Line Items]        
Gains (losses) on derivatives 1.9 (0.6) 3.8 (2.9)
Gain (loss) on derivatives not designated as hedging instruments $ 1.5 $ (1.8) $ 2.9 $ (5.2)