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Commitments and contingencies - Narrative (Details)
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2025
USD ($)
engine
helicopter
aircraft
Jun. 30, 2024
USD ($)
Jun. 30, 2025
USD ($)
engine
helicopter
aircraft
Jun. 30, 2024
USD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2017
USD ($)
Jun. 11, 2025
USD ($)
Jun. 09, 2022
aircraft
Dec. 31, 1992
engine
aircraft
Loss Contingencies [Line Items]                  
Number of managed aircrafts | aircraft               3  
Net recoveries related to Ukraine Conflict $ (972,822,000) $ 0 $ (972,822,000) $ (22,749,000) $ 2,700,000,000        
VASP litigation                  
Loss Contingencies [Line Items]                  
Loss contingency, loss in period           $ 0      
VASP litigation | Aircraft                  
Loss Contingencies [Line Items]                  
Number of leased assets | aircraft                 13
VASP litigation | Engines                  
Loss Contingencies [Line Items]                  
Number of leased assets | engine                 3
Aviation, War and Allied Perils | AerCap Ireland                  
Loss Contingencies [Line Items]                  
Amount awarded under insurance claim             $ 1,000,000,000    
All Risks, Operator Reinsurance Policies                  
Loss Contingencies [Line Items]                  
Loss contingency, insurance coverage claimable by entity 1,500,000,000   $ 1,500,000,000            
C&P Policy                  
Loss Contingencies [Line Items]                  
Net recoveries related to Ukraine Conflict $ 973,000,000                
Capital Addition Purchase Commitments                  
Loss Contingencies [Line Items]                  
Purchase obligation, number of aircrafts | aircraft 272   272            
Purchase obligation, number of engines | engine 46   46            
Purchase obligation, number of helicopters | helicopter 17   17