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Maintenance rights intangible and lease premium, net (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
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Maintenance Rights Intangible And Lease Premium, Net [Abstract] |  |
Maintenance rights intangible | $ 1,464,599 | $ 2,117,034
Lease premium, net | 37,259 | 50,891
Maintenance rights intangible and lease premium, net | $ 1,501,858 | $ 2,167,925

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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 Intangible + References No definition available. + Details
Name: | aer_MaintenanceRightsIntangible
Namespace Prefix: | aer_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Maintenance Rights Intangible And Lease Premium [Abstract] + References No definition available. + Details
Name: | aer_MaintenanceRightsIntangibleAndLeasePremiumAbstract
Namespace Prefix: | aer_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Maintenance Rights Intangible And Lease Premium, Net + References No definition available. + Details
Name: | aer_MaintenanceRightsIntangibleAndLeasePremiumNet
Namespace Prefix: | aer_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant