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Accrued Maintenance Liability (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015
Accrued Maintenance Liability [Abstract] |  |
Accrued maintenance liability at beginning of period | $ 3,185,794 | $ 3,194,365
Maintenance payments received | 794,711 | 776,488
Maintenance payments returned | (505,407) | (558,477)
Release to income other than upon sale | (421,332) | (243,809)
Release to income upon sale | (341,161) | (49,077)
Lessor contribution, top ups and other | 8,315 | 18,403
Interest accretion | 26,563 | 47,901
Additions due to aircraft acquisitions | 3,093 |
Accrued maintenance liability at end of period | $ 2,750,576 | $ 3,185,794

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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
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- Definition Accrued Maintenance Liability [Abstract] + References No definition available. + Details
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Namespace Prefix: | aer_
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- Definition Accrued Maintenance Liability Additions Due To Acquisitions + References No definition available. + Details
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Namespace Prefix: | aer_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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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
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Namespace Prefix: | aer_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- Definition Accrued Maintenance Liability, Maintenance Payments Received + References No definition available. + Details
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Namespace Prefix: | aer_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- Definition Accrued Maintenance Liability, Maintenance Payments Reimbursed Or Released To Income + References No definition available. + Details
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Namespace Prefix: | aer_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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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
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Namespace Prefix: | aer_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration