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Commitments And Contingencies (Summary Of Movements In Prepayments On Flight Equipment) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015
Commitments And Contingencies [Abstract] |  |
Net book value at beginning of period | $ 3,300,426 | $ 3,486,514
Prepayments made during the period | 837,776 | 747,541
Interest capitalized during the period | 107,688 | 79,230
Prepayments and capitalized interest applied to the purchase of flight equipment | (979,911) | (1,012,859)
Net book value at end of period | $ 3,265,979 | $ 3,300,426

X
- Definition Amount of increase in the carrying amount of advance payments for the acquisition of forward order aircraft for advance payments made during the period. + References No definition available. + Details
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Namespace Prefix: | aer_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of increase in the carrying amount of advance payments for the acquisition of forward order aircraft for interest that is capitalized during the period. + References No definition available. + Details
Name: | aer_PrepaymentsOnFlightEquipmentAdditionsInterestCapitalized
Namespace Prefix: | aer_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of advance payments for the acquisition of forward order aircraft applied against the purchase of flight equipment during the period. Includes the related capitalized interest. + References No definition available. + Details
Name: | aer_PrepaymentsOnFlightEquipmentReductionsPurchaseOfFlightEquipment
Namespace Prefix: | aer_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

X
- Definition Carrying amount, at the balance sheet date, of deposits made to the manufacturer for new flight equipment still under construction. May include capitalized interest. + References No definition available. + Details
Name: | us-gaap_DepositsOnFlightEquipment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant