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Financial Derivative Instruments - Fuel Hedging (Details) gal in Millions	3 Months Ended
	Mar. 31, 2022 gal
Remainder of 2022
Volume of Fuel Hedging
Fuel Hedged (in gallons)	915
2023
Volume of Fuel Hedging
Fuel Hedged (in gallons)	769
2024
Volume of Fuel Hedging
Fuel Hedged (in gallons)	358

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Nominal volume used to calculate payments on a derivative instrument.

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