Summary of Significant Accounting Policies - Aircraft Purchase Hedging Activities (Details) - Interest Rate Swap	12 Months Ended
Dec. 31, 2021
Minimum
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Swap rate period	7 years
Maximum
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Swap rate period	9 years

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.

No definition available.

Name:	us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration