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Maintenance rights intangible and lease premium, net (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
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

Name:	aer_LeasePremium
Namespace Prefix:	aer_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- 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

X

- 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

X

- 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