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Long-Term Debt, Maturities, Repayments Of Interest And Fee Commitments, After Year Five

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Long-Term Debt, Maturities, Repayments Of Interest And Fee Commitments Due In Remainder of Fiscal Year

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Long-Term Debt, Maturities, Repayments Of Interest And Fee Commitments, Year Five

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Long-Term Debt, Maturities, Repayments Of Interest And Fee Commitments, Year Four

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Long-Term Debt, Maturities, Repayments Of Interest And Fee Commitments, Year Three

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Long-Term Debt, Maturities, Repayments Of Interest And Fee Commitments, Year Two

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Number of Aircraft without Secured Financing Commitments Scheduled for Delivery

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Number of Spare Aircraft Engines Ordered

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Number of Aircraft with Secured Sale-leaseback Financing Commitments Scheduled for Delivery

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Number of Delivered Aircraft with Secured Debt Financing Commitments

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Property, Plant and Equipment, Number Of Aircraft To Be Purchased

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Area of a real estate property.

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The cash outflow from the acquisition of a piece of land, anything permanently fixed to it, including buildings, structures on it and so forth; includes real estate intended to generate income for the owner; excludes real estate acquired for use by the owner.

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Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing in the remainder of the fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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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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Commitments and Contingencies - Aircraft-Related Commitments and Financing Arrangements (Details) $ in Millions	1 Months Ended	36 Months Ended
	Oct. 31, 2019 aircraft	Sep. 30, 2022 USD ($)	Sep. 30, 2019 USD ($) ft² aircraft_engine aircraft
Interest Commitments
Area of Real Estate Property \| ft²			500,000
Secured Debt [Member]
Interest Commitments
Interest commitments, remainder of 2019			$ 22.7
Interest commitments, 2020			78.5
Interest commitments, 2021			71.3
Interest commitments, 2022			64.3
Interest commitments, 2023			54.1
Interest commitments, 2024 and beyond			$ 157.9
2019 [Member] \| Airbus [Member]
Committed Expenditures
Number of aircraft with secured sale-leaseback financing commitments scheduled for delivery \| aircraft			5
2019-2021 [Member] [Member] \| Airbus [Member]
Committed Expenditures
Number of aircraft without secured financing commitments scheduled for delivery \| aircraft			37
Aircraft and Related Flight Equipment [Member]
Committed Expenditures
Committed expenditures, remainder of 2019			$ 308.1
Committed expenditures, 2020			858.1
Committed expenditures, 2021			776.1
Committed expenditures, 2022			17.6
Committed expenditures, 2023			8.3
Committed expenditures, 2024 and beyond			0.0
Non-aircraft Related Commitments [Member]
Committed Expenditures
Committed expenditures, remainder of 2019			3.4
Committed expenditures, 2020			17.5
Committed expenditures, 2021			14.7
Committed expenditures, 2022			13.9
Committed expenditures, 2023			12.7
Committed expenditures, 2024 and beyond			$ 60.1
V2500 SelectTWO Engine [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Number of spare aircraft engines ordered \| aircraft_engine			1
PurePower PW1100G-JM Engine [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Number of spare aircraft engines ordered \| aircraft_engine			6
A320 and A321 [Member]
Committed Expenditures
Number of delivered aircraft with secured debt financing commitments \| aircraft			62
Forecast [Member] \| A320 Family [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
Number of aircrafts to be purchased \| aircraft	100
Number of aircrafts to be purchased, optional \| aircraft	50
Forecast [Member] \| Real Estate Properties [Domain]
Interest Commitments
Payments to acquire real estate		$ 250.0