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Commitments and contingencies - Narrative (Details)
 12 Months Ended
Dec. 31, 2023
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2008
USD ($)
Jul. 31, 2024
aircraft
Jun. 30, 2024
USD ($)
aircraft
helicopter
engine
Jun. 09, 2022
aircraft
Dec. 31, 1992
aircraft
engine
Loss Contingencies [Line Items]              
Number of managed aircrafts | aircraft           3  
VASP litigation              
Loss Contingencies [Line Items]              
Loss contingency, loss in period | $   $ 0          
VASP litigation | VASP litigation English court              
Loss Contingencies [Line Items]              
Claim award for loss of profit plus accrued interest | $     $ 66,000,000        
VASP litigation | Aircraft              
Loss Contingencies [Line Items]              
Number of leased assets | aircraft             13
Number of leases that company incurred obligations due to another company's default | aircraft             13
VASP litigation | Engines              
Loss Contingencies [Line Items]              
Number of leased assets | engine             3
Number of leases that company incurred obligations due to another company's default | aircraft             3
Russian Operator Reinsurance Claims              
Loss Contingencies [Line Items]              
Gain contingency, unrecorded amount | $         $ 1,800,000,000    
C&P Policy | AerCap Ireland              
Loss Contingencies [Line Items]              
Insurance proceeds | $ $ 1,300,000,000            
Aircraft Hull and Spares and Equipment              
Loss Contingencies [Line Items]              
Loss contingency, insurance coverage claimable by entity | $         2,100,000,000    
Aviation, War and Allied Perils              
Loss Contingencies [Line Items]              
Loss contingency, insurance coverage claimable by entity | $         $ 1,200,000,000    
Capital Addition Purchase Commitments              
Loss Contingencies [Line Items]              
Purchase obligation, number of aircrafts | aircraft         351    
Purchase obligation, number of engines | engine         68    
Purchase obligation, number of helicopters | helicopter         13    
Capital Addition Purchase Commitments | Subsequent event              
Loss Contingencies [Line Items]              
Purchase obligation, additional aircrafts | aircraft       36