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Other income - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Component of Operating Income [Abstract]
Proceeds from unsecured claims	$ 1,329	$ 39,352	$ 2,913	$ 39,352

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- Definition

Other Income, Restructuring Claims

+ References

No definition available.

+ Details

Name:	aer_OtherIncomeRestructuringClaims
Namespace Prefix:	aer_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

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- References

No definition available.

+ Details

Name:	us-gaap_OtherIncomeAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration