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Accrued Maintenance Liability (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Accrued Maintenance Liability [Abstract] |  |  |
Accrued maintenance liability at beginning of period | $ 3,194,365 | $ 466,293 |
ILFC Transaction |  | 2,575,118 |
GFL Transaction |  | (88,523) |
Maintenance payments received | 776,488 | 561,558 |
Maintenance payments returned | (558,477) | (286,041) |
Release to income upon redelivery | (243,809) | (92,296) | $ 9,900
Release to income upon sale | (49,077) |  |
Lessor contribution and top ups | 18,403 | 5,570 |
Interest accretion | 47,901 | 52,686 |
Accrued maintenance liability at end of period | $ 3,185,794 | $ 3,194,365 | $ 466,293

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- Definition Obligation towards lessees for the periodic payments received from the lessee of supplemental maintenance rent which is calculated with reference to the utilization of airframes, engines and other major life-limited components during the lease. + References No definition available. + Details
Name: | aer_AccruedMaintenanceLiability
Namespace Prefix: | aer_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Accrued Maintenance Liability [Abstract] + References No definition available. + Details
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Namespace Prefix: | aer_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Accrued Maintenance Liability, Acquisitions During Period + References No definition available. + Details
Name: | aer_AccruedMaintenanceLiabilityAcquisitionsDuringPeriod
Namespace Prefix: | aer_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Accrued Maintenance Liability, Dispositions During Period + References No definition available. + Details
Name: | aer_AccruedMaintenanceLiabilityDispositionsDuringPeriod
Namespace Prefix: | aer_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Accrued Maintenance Liability, Interest Accretion + References No definition available. + Details
Name: | aer_AccruedMaintenanceLiabilityInterestAccretion
Namespace Prefix: | aer_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- Definition Accrued Maintenance Liability, Lessor Contribution And Top Ups + References No definition available. + Details
Name: | aer_AccruedMaintenanceLiabilityLessorContributionAndTopUps
Namespace Prefix: | aer_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Accrued Maintenance Liability, Maintenance Payments Received + References No definition available. + Details
Name: | aer_AccruedMaintenanceLiabilityMaintenancePaymentsReceived
Namespace Prefix: | aer_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Accrued Maintenance Liability, Maintenance Payments Reimbursed Or Released To Income + References No definition available. + Details
Name: | aer_AccruedMaintenanceLiabilityMaintenancePaymentsReimbursedOrReleasedToIncome
Namespace Prefix: | aer_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Accrued Maintenance Liability, Release To Income Upon Redelivery Or Termination + References No definition available. + Details
Name: | aer_AccruedMaintenanceLiabilityReleaseToIncomeUponRedeliveryOrTermination
Namespace Prefix: | aer_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Accrued Maintenance Liability, Release To Income Upon Sale + References No definition available. + Details
Name: | aer_AccruedMaintenanceLiabilityReleaseToIncomeUponSale
Namespace Prefix: | aer_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration