Debt - 2019-1 EETC (Details) - Secured Debt $ in Millions	10 Months Ended
Dec. 31, 2019 USD ($)
2019-1 Class AA Certificates
Debt Instrument [Line Items]
Total principal	$ 425
Fixed interest rate (percent)	3.204%
Issuance date	Mar. 01, 2019
Final maturity date	Apr. 30, 2024
2019-1 Class A Certificates
Debt Instrument [Line Items]
Total principal	$ 75
Fixed interest rate (percent)	3.404%
Issuance date	Mar. 01, 2019
Final maturity date	Apr. 30, 2024
Pass Through Certificates Series 2019-1
Debt Instrument [Line Items]
Total principal	$ 500

Face (par) amount of debt instrument at time of issuance.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Date the debt instrument was issued, in CCYY-MM-DD format.

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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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