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v3.19.3.a.u2

Net investment in finance and sales-type leases (Narrative) (Details) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 USD ($)
Flight Equipment, Net [Abstract] |
Sales-type and direct financing leases, impairment charge | $ 22.0

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- Definition Sales-type and Direct Financing Leases, Impairment Loss + References No definition available. + Details
Name: | aer_SalestypeandDirectFinancingLeasesImpairmentLoss
Namespace Prefix: | aer_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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