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Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
EOL and MR contract maintenance rights expense |  | $ 355,845 | $ 381,637 | $ 348,366
EOL contract maintenance rights write-off due to cash receipt |  | 106,433 | 96,503 | 118,438
MR contract maintenance rights write-off due to maintenance liability release |  | 77,494 | 173,971 | 161,839
Maintenance rights write-off | [1] | 539,772 | 652,111 | 628,643
Accrued maintenance liability settled by buyers upon sale of disposal of assets |  | 275,360 | 341,161 |
Non-Cash Investing And Financing Activities [Member] |  |  |  |
Flight equipment reclassified to net investment in finance and sales-type leases |  | 332,200 | 442,200 | 152,200
Accrued maintenance liability settled by buyers upon sale of disposal of assets |  | 275,400 | 341,200 | 49,100
Net investment in finance and sales-type leases reclassified to flight equipment held for operating leases |  |  | 18,400 |
Non-Cash Investing And Financing Activities [Member] | Other Assets [Member] |  |  |  |
Flight equipment reclassified to other assets |  | $ 20,600 | $ 87,800 | $ 49,600
[1] | Maintenance rights write-off consisted of the following:EOL and MR contract maintenance rights expense$355,845 $381,637 $348,366EOL contract maintenance rights write-off due to cash receipt106,433 96,503 118,438MR contract maintenance rights write-off due to maintenance liability release77,494 173,971 161,839Maintenance rights write-off$539,772 $652,111 $628,643

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- Definition Accrued Maintenance Liability, Release To Income Upon Sale + References No definition available. + Details
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Namespace Prefix: | aer_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Represents the aggregate expense charged against earnings to allocate the maintenance rights expense related to a limited duration contract for service and contractual agreement that stipulates the lessee pay the lessor for use of an asset. + References No definition available. + Details
Name: | aer_AmortizationOfMaintenanceRightsExpense
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition The total of the amount of flight equipment under operating leases reclassified to net investment in finance and sale-type leases and any amount charged to expense (recognized in income). + References No definition available. + Details
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- Definition Amount of flight equipment under operating leases transferred to other assets. + References No definition available. + Details
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Namespace Prefix: | aer_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Maintenance Rights Intangible, End Of Lease Contract Cash Receipt + References No definition available. + Details
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Namespace Prefix: | aer_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Maintenance Rights Intangible, End Of Lease Contract Maintenance Rights Expense + References No definition available. + Details
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Namespace Prefix: | aer_
Data Type: | xbrli:monetaryItemType
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- Definition Maintenance Rights Intangible, Maintenance Reserved Contract Rights Expense Offset By Maintenance Liability Release + References No definition available. + Details
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Namespace Prefix: | aer_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Property Subject To Or Available For Operating Lease Reclassified From Net Investment In Finance And Sales Type Leases Inventory + References No definition available. + Details
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Namespace Prefix: | aer_
Data Type: | xbrli:monetaryItemType
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- Details
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Namespace Prefix: |
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- Details
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Period Type: |