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Net Investment in Sales-type Lease - Narrative (Details) | Dec. 31, 2023 aircraft
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Leases [Abstract] |
Sales-type lease, number of aircrafts | 12

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- Definition Lessor, Sales-type Lease, Number of Aircraft + References No definition available. + Details
Name: | al_LessorSalesTypeLeaseNumberOfAircraft
Namespace Prefix: | al_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_LeasesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration