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

Debt (Summary of indebtedness) (Details)

v3.8.0.1
Debt (Summary of indebtedness) (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2017
USD ($)
aircraft
Dec. 31, 2016
USD ($)
Jun. 30, 2015
USD ($)
Dec. 31, 2010
USD ($)
Debt Instrument [Line Items]        
Collateral (Number of aircraft) | aircraft 503      
Commitment $ 34,969,697      
Undrawn amounts 6,706,576      
Debt issuance costs and debt discounts (160,061) $ (156,901)    
Debt $ 28,420,739 27,716,999    
Export Credit Facilities [Member]        
Debt Instrument [Line Items]        
Collateral (Number of aircraft) | aircraft 71      
Unsecured Debt [Member]        
Debt Instrument [Line Items]        
Commitment $ 19,314,864      
Undrawn amounts 4,395,000      
Outstanding 15,206,290 14,800,212    
Unsecured Debt [Member] | ILFC Legacy Notes [Member]        
Debt Instrument [Line Items]        
Commitment 5,670,000      
Undrawn amounts 0      
Outstanding $ 5,670,000 7,670,000    
Weighted average interest rate [1] 6.32%      
Unsecured Debt [Member] | AerCap Aviation Notes [Member]        
Debt Instrument [Line Items]        
Commitment $ 0      
Undrawn amounts 0      
Outstanding $ 0 300,000    
Weighted average interest rate [1] 0.00%      
Unsecured Debt [Member] | AerCap Trust & AICDC [Member]        
Debt Instrument [Line Items]        
Commitment $ 8,399,864      
Undrawn amounts 0      
Outstanding $ 8,399,864 6,399,864    
Weighted average interest rate [1] 4.12%      
Unsecured Debt [Member] | Asia Revolving Credit Facility [Member]        
Debt Instrument [Line Items]        
Commitment $ 600,000      
Undrawn amounts 300,000      
Outstanding $ 300,000 0    
Weighted average interest rate [1] 3.44%      
Unsecured Debt [Member] | Citi Revolving Credit Facility [Member]        
Debt Instrument [Line Items]        
Commitment $ 3,895,000      
Undrawn amounts 3,895,000      
Outstanding $ 0 0    
Weighted average interest rate [1] 0.00%      
Unsecured Debt [Member] | AIG Revolving Credit Facility [Member]        
Debt Instrument [Line Items]        
Commitment $ 200,000      
Undrawn amounts 200,000      
Outstanding $ 0 0    
Weighted average interest rate [1] 0.00%      
Unsecured Debt [Member] | Other Unsecured Debt [Member]        
Debt Instrument [Line Items]        
Commitment $ 550,000      
Undrawn amounts 0      
Outstanding $ 550,000 0    
Weighted average interest rate [1] 3.11%      
Unsecured Debt [Member] | Unsecured Debt, Fair Value Adjustment [Member]        
Debt Instrument [Line Items]        
Outstanding $ 286,426 430,348    
Secured Debt [Member]        
Debt Instrument [Line Items]        
Commitment 14,099,053      
Undrawn amounts 2,311,576      
Outstanding $ 11,818,959 11,518,140    
Secured Debt [Member] | Export Credit Facilities [Member]        
Debt Instrument [Line Items]        
Collateral (Number of aircraft) | aircraft 71      
Commitment $ 1,241,262      
Undrawn amounts 0      
Outstanding $ 1,241,262 1,722,376    
Weighted average interest rate [1] 2.59%      
Secured Debt [Member] | Senior Secured Notes [Member]        
Debt Instrument [Line Items]        
Collateral (Number of aircraft) | aircraft 81      
Commitment $ 1,275,000      
Undrawn amounts 0      
Outstanding $ 1,275,000 1,275,000    
Weighted average interest rate [1] 7.13%      
Secured Debt [Member] | Institutional Secured Term Loans & Secured Portfolio Loans [Member]        
Debt Instrument [Line Items]        
Collateral (Number of aircraft) | aircraft 239      
Commitment $ 6,943,431      
Undrawn amounts 690,000      
Outstanding $ 6,253,431 5,028,623    
Weighted average interest rate [1] 3.55%      
Secured Debt [Member] | ALS II Debt [Member]        
Debt Instrument [Line Items]        
Commitment $ 0      
Undrawn amounts 0      
Outstanding $ 0 17,746    
Weighted average interest rate [1] 0.00%      
Secured Debt [Member] | AerFunding Revolving Credit Facility [Member]        
Debt Instrument [Line Items]        
Collateral (Number of aircraft) | aircraft 18      
Commitment $ 2,500,000      
Undrawn amounts 1,621,576      
Outstanding $ 878,424 596,819    
Weighted average interest rate [1] 3.43%      
Secured Debt [Member] | AeroTurbine Revolving Credit Agreement [Member]        
Debt Instrument [Line Items]        
Commitment $ 0      
Undrawn amounts 0      
Outstanding $ 0 125,000    
Weighted average interest rate [1] 0.00%      
Secured Debt [Member] | Other Secured Debt [Member]        
Debt Instrument [Line Items]        
Collateral (Number of aircraft) | aircraft 94      
Commitment $ 2,139,360      
Undrawn amounts 0      
Outstanding $ 2,139,360 2,670,325    
Weighted average interest rate [1] 3.66%      
Secured Debt [Member] | Secured Debt Fair Value Adjustment [Member]        
Debt Instrument [Line Items]        
Outstanding $ 31,482 82,251    
Subordinated Debt [Member]        
Debt Instrument [Line Items]        
Commitment 1,555,780      
Outstanding 1,555,551 1,555,548    
Subordinated Debt [Member] | ECAPs Subordinated Debt [Member]        
Debt Instrument [Line Items]        
Commitment 1,000,000      
Outstanding $ 1,000,000 1,000,000    
Weighted average interest rate [1] 4.47%      
Subordinated Debt [Member] | Junior Subordinated Notes [Member]        
Debt Instrument [Line Items]        
Commitment $ 500,000      
Outstanding $ 500,000 500,000    
Weighted average interest rate [1] 6.50%      
Debt     $ 500,000  
Subordinated Debt [Member] | Subordinated Debt Joint Ventures Partners [Member]        
Debt Instrument [Line Items]        
Commitment $ 55,780      
Outstanding $ 55,780 55,780    
Weighted average interest rate [1] 2.26%      
Debt       $ 64,300
Subordinated Debt [Member] | Subordinated Debt Fair Value Adjustment [Member]        
Debt Instrument [Line Items]        
Outstanding $ (229) $ (232)    
[1] The weighted average interest rate for our floating rate debt is calculated based on the U.S. dollar LIBOR rate as of the last interest payment date of the respective debt, and excludes the impact of related derivative financial instruments which we hold to hedge our exposure to floating interest rates, as well as any amortization of debt issuance costs and debt discounts.