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Accrued Maintenance Liability (Details) - USD ($) $ in Thousands	12 Months Ended
	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.

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No definition available.

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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]

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No definition available.

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Name:	aer_AccruedMaintenanceLiabilityAbstract
Namespace Prefix:	aer_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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- Definition

Accrued Maintenance Liability Additions Due To Acquisitions

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No definition available.

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Name:	aer_AccruedMaintenanceLiabilityAdditionsDueToAcquisitions
Namespace Prefix:	aer_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

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- Definition

Accrued Maintenance Liability, Interest Accretion

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No definition available.

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Name:	aer_AccruedMaintenanceLiabilityInterestAccretion
Namespace Prefix:	aer_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

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- Definition

Accrued Maintenance Liability, Lessor Contribution And Top Ups

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No definition available.

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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

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No definition available.

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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

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No definition available.

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Name:	aer_AccruedMaintenanceLiabilityMaintenancePaymentsReimbursedOrReleasedToIncome
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

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No definition available.

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Name:	aer_AccruedMaintenanceLiabilityReleaseToIncomeUponRedeliveryOrTermination
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 Sale

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No definition available.

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