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v3.19.2

Supplemental guarantor financial information (Narrative) (Details) $ in Billions | Jun. 30, 2019 USD ($)
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Condensed Financial Information Disclosure [Abstract] |
Operating lease right of use asset and liability | $ 1.4

X
- Definition Operating Lease, Right-of-Use Asset And Liability + References No definition available. + Details
Name: | aer_OperatingLeaseRightofUseAssetAndLiability
Namespace Prefix: | aer_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
Name: | srt_CondensedFinancialInformationOfParentCompanyOnlyDisclosureAbstract
Namespace Prefix: | srt_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration