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Unaudited Condensed Consolidated Statements of Cash Flows (Parenthetical) - Non-cash investing and financing activities - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Flight equipment reclassified to net investment in finance and sales-type leases	$ 168,000	$ 206,000
Flight equipment reclassified to held for sale, net	424,000	520,000
Release to income upon sale	$ 90,637	$ 2,766

X

- Definition

Accrued Maintenance Liability, Release To Income Upon Sale

+ References

No definition available.

+ Details

Name:	aer_AccruedMaintenanceLiabilityReleaseToIncomeUponSale
Namespace Prefix:	aer_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- 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

Name:	aer_AmountOfFlightEquipmentUnderOperatingLeasesReclassifiedToNetInvestmentInFinanceLeasesInventoryTotal
Namespace Prefix:	aer_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount Of Flight Equipment Under Operating Leases Transferred To Flight Equipment Held For Sale

+ References

No definition available.

+ Details

Name:	aer_AmountOfFlightEquipmentUnderOperatingLeasesTransferredToFlightEquipmentHeldForSale
Namespace Prefix:	aer_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

Name:	us-gaap_OtherSignificantNoncashTransactionsByUniqueDescriptionAxis=aer_NonCashInvestingAndFinancingActivitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: