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Allowance for credit losses - Narrative (Details) - USD ($) $ in Thousands | 6 Months Ended
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Jun. 30, 2022 | Jun. 30, 2021
COVID-19 Pandemic |  |
Allowance For Credit Loss [Line Items] |  |
Increase in allowance for credit loss |  | $ 17,000
Ukraine conflict |  |
Allowance For Credit Loss [Line Items] |  |
Increase in allowance for credit loss | $ 75,800 |

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- Definition Allowance For Credit Loss + References No definition available. + Details
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Namespace Prefix: | aer_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Allowance for Credit Loss, Period Increase (Decrease) + References No definition available. + Details
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Namespace Prefix: | aer_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |