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

Debt (Unsecured Narrative) (Details)

v3.3.1.900
Debt (Unsecured Narrative) (Details) - USD ($)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Debt Instrument [Line Items]    
Total outstanding indebtedness, excluding fair value adjustments $ 28,960,488,000  
Long-term Debt 29,806,843,000 $ 30,402,392,000
AerCap Aviation Notes [Member]    
Debt Instrument [Line Items]    
Long-term Debt 29,807,000,000 30,402,000,000
Face amount $ 300,000,000  
Stated interest rate 6.375%  
Acquisition Notes [Member]    
Debt Instrument [Line Items]    
Face amount $ 2,600,000,000  
2017 Notes [Member]    
Debt Instrument [Line Items]    
Face amount $ 400,000,000  
Stated interest rate 2.75%  
2019 Notes [Member]    
Debt Instrument [Line Items]    
Face amount $ 1,100,000,000  
Stated interest rate 3.75%  
2020 Notes [Member]    
Debt Instrument [Line Items]    
Face amount $ 500,000,000  
Stated interest rate 4.25%  
2021 Notes [Member]    
Debt Instrument [Line Items]    
Face amount $ 1,100,000,000  
Stated interest rate 4.50%  
September 2014 Notes [Member]    
Debt Instrument [Line Items]    
Face amount $ 800,000,000  
Stated interest rate 5.00%  
June 2015 Notes [Member]    
Debt Instrument [Line Items]    
Face amount $ 1,000,000,000  
2022 Notes [Member]    
Debt Instrument [Line Items]    
Face amount $ 500,000,000  
Stated interest rate 4.625%  
October 2015 Notes [Member]    
Debt Instrument [Line Items]    
Face amount $ 1,000,000,000  
Stated interest rate 4.625%  
AGAT/AICL Notes [Member]    
Debt Instrument [Line Items]    
Spread over reference rate 0.50%  
Amount allowed to be repurchased as a percentage of outstanding principal 100.00%  
Unsecured Debt [Member]    
Debt Instrument [Line Items]    
Long-term Debt $ 15,619,510,000 15,982,990,000
Unsecured Debt [Member] | ILFC Legacy Notes [Member]    
Debt Instrument [Line Items]    
Long-term Debt $ 9,220,000,000 11,230,020,000
Spread over reference rate 1.95%  
Unsecured Debt [Member] | AerCap Aviation Notes [Member]    
Debt Instrument [Line Items]    
Long-term Debt $ 300,000,000 $ 300,000,000
Unsecured Debt [Member] | Minimum [Member] | ILFC Legacy Notes [Member]    
Debt Instrument [Line Items]    
Stated interest rate 3.875%  
Unsecured Debt [Member] | Maximum [Member] | ILFC Legacy Notes [Member]    
Debt Instrument [Line Items]    
Stated interest rate 8.875%