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Maintenance rights and lease premium, net - Schedule of Maintenance Rights and Lease Premium, Net (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
Maintenance rights	$ 1,669,742	$ 2,099,513
Lease premium, net	460,251	630,449
Maintenance rights and lease premium, net	$ 2,129,993	$ 2,729,962

X

- Definition

Lease Premium

+ References

No definition available.

+ Details

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Namespace Prefix:	aer_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Maintenance Rights

+ References

No definition available.

+ Details

Name:	aer_MaintenanceRights
Namespace Prefix:	aer_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Maintenance Rights And Lease Premium, Net

+ References

No definition available.

+ Details

Name:	aer_MaintenanceRightsAndLeasePremiumNet
Namespace Prefix:	aer_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- References

No definition available.

+ Details

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