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Concentration of Risk - Narrative (Details)	12 Months Ended
	Dec. 31, 2022 leased_aircraft country	Dec. 31, 2021 country leased_aircraft
Risks and Uncertainties [Abstract]
Number of aircraft leased | leased_aircraft	117	118
Number of countries | country	62	60
Minimum percentage of aircraft operated internationally based on net book value	95.00%

X

- Definition

Represents the minimum percentage of aircraft operated internationally.

+ References

No definition available.

+ Details

Name:	al_MinimumPercentageOfAircraftOperatedInternationally
Namespace Prefix:	al_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the number of aircraft leased.

+ References

No definition available.

+ Details

Name:	al_NumberOfAircraftLeased
Namespace Prefix:	al_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The number of countries in which the entity operates as of balance sheet date.

+ References

No definition available.

+ Details

Name:	us-gaap_NumberOfCountriesInWhichEntityOperates
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- References

No definition available.

+ Details

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