v3.25.4
Fair Value Measurements and Derivative Instruments - Schedule of Outstanding Fuel Swap Agreements (Details) - Fuel Price Risk - T
Dec. 31, 2025
Dec. 31, 2024
2026    
Derivative instruments disclosure    
Fuel swap agreements (metric tons) 1,065,500,000 786,750,000
Percentage of projected requirements 60.00% 44.00%
2027    
Derivative instruments disclosure    
Fuel swap agreements (metric tons) 819,048,000 364,048,000
Percentage of projected requirements 47.00% 20.00%
2028    
Derivative instruments disclosure    
Fuel swap agreements (metric tons) 465,699,000 0
Percentage of projected requirements 26.00% 0.00%