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Financial Derivative Instruments - Fuel Hedging (Details)
gal in Millions
3 Months Ended
Mar. 31, 2024
gal
Remainder of 2024  
Volume of Fuel Hedging  
Fuel Hedged (in gallons) 949
2025  
Volume of Fuel Hedging  
Fuel Hedged (in gallons) 1,033
2026  
Volume of Fuel Hedging  
Fuel Hedged (in gallons) 718