XML 44 R31.htm IDEA: XBRL DOCUMENT v3.22.2.2
Financial Derivative Instruments - Fuel Hedging (Details)
gal in Millions
9 Months Ended
Sep. 30, 2022
gal
Remainder of 2022  
Volume of Fuel Hedging  
Fuel Hedged (in gallons) 305
2023  
Volume of Fuel Hedging  
Fuel Hedged (in gallons) 1,084
2024  
Volume of Fuel Hedging  
Fuel Hedged (in gallons) 358