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Lease revenue - Narrative (Details)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Lease Revenue [Abstract]
Percent of rent attributable to variable leases	5.00%	6.00%

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- Definition

Lease Revenue [Abstract]

+ References

No definition available.

+ Details

Name:	aer_LeaseRevenueAbstract
Namespace Prefix:	aer_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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- Definition

Lessor, Operating Lease, Percent Of Rent Attributable To Variable Leases

+ References

No definition available.

+ Details

Name:	aer_LessorOperatingLeasePercentOfRentAttributableToVariableLeases
Namespace Prefix:	aer_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration