Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Debt (Summary of indebtedness) (Details)

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Debt (Summary of indebtedness) (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2019
USD ($)
aircraft
engine
Dec. 31, 2018
USD ($)
Debt Disclosure [Abstract]    
Outstanding indebtedness, excluding fair value adjustments, debt issuance costs and debt discounts $ 29,528,230  
Fair value adjustments $ 96,000  
Debt Instrument [Line Items]    
Collateral (number of aircraft) | aircraft 267  
Commitment $ 36,103,085  
Undrawn amounts 6,574,855  
Debt issuance costs, debt discounts and debt premium (138,135) $ (160,616)
Debt 29,486,131 29,507,587
AerCap Trust & AICDC Notes    
Debt Instrument [Line Items]    
Debt 29,486,000 29,508,000
Unsecured    
Debt Instrument [Line Items]    
Commitment 22,374,000  
Undrawn amounts 4,950,000  
Amount outstanding 17,523,093 17,187,314
Unsecured | ILFC Legacy Notes    
Debt Instrument [Line Items]    
Commitment 2,900,000  
Undrawn amounts 0  
Amount outstanding $ 2,900,000 4,900,000
Weighted average interest rate 7.09%  
Unsecured | AerCap Trust & AICDC Notes    
Debt Instrument [Line Items]    
Commitment $ 12,500,000  
Undrawn amounts 0  
Amount outstanding $ 12,500,000 10,749,864
Weighted average interest rate 4.13%  
Unsecured | Asia Revolving Credit Facility    
Debt Instrument [Line Items]    
Commitment $ 950,000  
Undrawn amounts 950,000  
Amount outstanding $ 0 200,000
Weighted average interest rate 0.00%  
Unsecured | Citi Revolving Credit Facility    
Debt Instrument [Line Items]    
Commitment $ 4,000,000  
Undrawn amounts 4,000,000  
Amount outstanding $ 0 0
Weighted average interest rate 0.00%  
Unsecured | Other unsecured debt    
Debt Instrument [Line Items]    
Commitment $ 2,024,000  
Undrawn amounts 0  
Amount outstanding $ 2,024,000 1,160,000
Weighted average interest rate 3.28%  
Unsecured | Unsecured debt, fair value adjustment    
Debt Instrument [Line Items]    
Amount outstanding $ 99,093 177,450
Secured    
Debt Instrument [Line Items]    
Commitment 11,431,564  
Undrawn amounts 1,624,855  
Amount outstanding $ 9,803,874 10,932,880
Secured | Export credit facilities    
Debt Instrument [Line Items]    
Collateral (number of aircraft) | aircraft 18  
Commitment $ 565,312  
Undrawn amounts 0  
Amount outstanding $ 565,312 849,372
Weighted average interest rate 2.43%  
Secured | Institutional secured term loans & secured portfolio loans    
Debt Instrument [Line Items]    
Collateral (number of aircraft) | aircraft 191  
Commitment $ 7,303,496  
Undrawn amounts 0  
Amount outstanding $ 7,303,496 7,533,028
Weighted average interest rate 3.62%  
Secured | AerFunding Revolving Credit Facility    
Debt Instrument [Line Items]    
Collateral (number of aircraft) | aircraft 16  
Commitment $ 2,500,000  
Undrawn amounts 1,624,855  
Amount outstanding $ 875,145 919,484
Weighted average interest rate 3.72%  
Secured | Other secured debt    
Debt Instrument [Line Items]    
Collateral (number of aircraft) | aircraft 42  
Commitment $ 1,062,756  
Undrawn amounts 0  
Amount outstanding $ 1,062,756 1,633,099
Weighted average interest rate 4.06%  
Number of engines pledged as collateral | engine 74  
Secured | Secured debt fair value adjustment    
Debt Instrument [Line Items]    
Amount outstanding $ (2,835) (2,103)
Secured | Secured Portfolio Loan    
Debt Instrument [Line Items]    
Debt 370,600  
Subordinated    
Debt Instrument [Line Items]    
Commitment 2,297,521  
Undrawn amounts 0  
Amount outstanding 2,297,299 1,548,009
Subordinated | Subordinated notes    
Debt Instrument [Line Items]    
Commitment 2,250,000  
Undrawn amounts 0  
Amount outstanding $ 2,250,000 1,500,000
Weighted average interest rate 5.18%  
Subordinated | Subordinated debt issued by joint ventures    
Debt Instrument [Line Items]    
Commitment $ 47,521  
Undrawn amounts 0  
Amount outstanding $ 47,521 48,234
Weighted average interest rate 0.00%  
Subordinated | Subordinated debt fair value adjustment    
Debt Instrument [Line Items]    
Amount outstanding $ (222) $ (225)
Other Secured Debt Limited Recourse In Nature | Other secured debt    
Debt Instrument [Line Items]    
Debt $ 104,000