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Debt (Institutional secured term & secured portfolio loans) (Details) $ in Thousands | Jun. 30, 2020 USD ($)
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Debt Instrument [Line Items] |
Commitment | $ 36,782,018
Full Recourse Secured Debt | Institutional secured term loans & secured portfolio loans |
Debt Instrument [Line Items] |
Commitment | $ 500,000

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- Definition Long Term Debt Composed Of Either Debt Instrument Face Amount Or Line Of Credit Facility Current Borrowing Capacity + References No definition available. + Details
Name: | aer_LongTermDebtComposedOfEitherDebtInstrumentFaceAmountOrLineOfCreditFacilityCurrentBorrowingCapacity
Namespace Prefix: | aer_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_LongtermDebtTypeAxis=aer_FullRecourseSecuredDebtMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_DebtInstrumentAxis=aer_InstitutionalSecuredTermLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |