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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
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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

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- 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

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- Definition Maintenance Rights + References No definition available. + Details
Name: | aer_MaintenanceRights
Namespace Prefix: | aer_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- 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

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