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Maintenance Rights Intangible And Lease Premium, Net (Schedule Of Maintenance Rights Intangible And Lease Premium) (Details) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015
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Maintenance Rights Intangible And Lease Premium, Net [Abstract] |  |
Maintenance rights intangible | $ 2,117,034 | $ 3,068,318
Lease premium, net | 50,891 | 70,727
Maintenance Rights Intangible And Lease Premium, Net | $ 2,167,925 | $ 3,139,045

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- Definition Lease Premium + References No definition available. + Details
Name: | aer_LeasePremium
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