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

Variable interest entities (Narrative) (Details)

v3.8.0.1
Variable interest entities (Narrative) (Details)
1 Months Ended 2 Months Ended 12 Months Ended
May 31, 2017
Feb. 28, 2018
USD ($)
Dec. 31, 2017
USD ($)
aircraft
Mar. 09, 2018
aircraft
Dec. 31, 2017
USD ($)
aircraft
airline
Dec. 31, 2016
USD ($)
Jun. 30, 2013
aircraft
Variable Interest Entity [Line Items]              
Number of aircraft | aircraft     980   980    
Debt guarantees     $ 104,867,000   $ 104,867,000 $ 125,429,000  
Aercap Partners I Facility [Member]              
Variable Interest Entity [Line Items]              
Outstanding amount under senior debt facility     $ 59,851,000   $ 59,851,000    
ALS II [Member]              
Variable Interest Entity [Line Items]              
Ownership percentage 100.00%            
Ownership percentage     5.00%   5.00%    
ALS II [Member] | ALS II Class E-1 Notes [Member]              
Variable Interest Entity [Line Items]              
Subordinated debt     $ 350,000,000   $ 350,000,000    
Percent of the subordinated fixed rate deferrable interest asset-backed notes 100.00%            
AerFunding [Member]              
Variable Interest Entity [Line Items]              
Ownership percentage         100.00%    
Ownership percentage     5.00%   5.00%    
Airbus 320 Family Aircraft [Member] | ALS II [Member]              
Variable Interest Entity [Line Items]              
Number of aircraft | aircraft     25   25    
Boeing 737-800 Aircraft [Member] | ACSAL [Member]              
Variable Interest Entity [Line Items]              
Number of aircraft | aircraft     8   8   8
AerCap Holdings N.V. | ACSAL [Member]              
Variable Interest Entity [Line Items]              
Ownership percentage             19.00%
AerCap Partners I [Member]              
Variable Interest Entity [Line Items]              
Ownership percentage         50.00%    
Subordinated debt     $ 63,800,000   $ 63,800,000    
AerCap Partners I [Member] | Aercap Partners I Facility [Member]              
Variable Interest Entity [Line Items]              
Outstanding amount under senior debt facility     $ 59,900,000   $ 59,900,000    
AerCap Partners I [Member] | Boeing 737 NG Aircraft [Member] | Aercap Partners I Facility [Member]              
Variable Interest Entity [Line Items]              
Number of aircraft | aircraft     7   7    
AerCap Partners I [Member] | Deucalion Aviation Funds [Member]              
Variable Interest Entity [Line Items]              
Ownership percentage         50.00%    
Subordinated debt     $ 31,900,000   $ 31,900,000    
AerCap Partners I [Member] | AerCap Holdings N.V.              
Variable Interest Entity [Line Items]              
Subordinated debt     31,900,000   $ 31,900,000    
AerCap Partners II [Member]              
Variable Interest Entity [Line Items]              
Ownership percentage         50.00%    
Subordinated debt     16,800,000   $ 16,800,000    
AerCap Partners II [Member] | Subsequent Event [Member]              
Variable Interest Entity [Line Items]              
Repayments of subordinated debt   $ 16,800,000          
AerCap Partners II [Member] | Deucalion Aviation Funds [Member]              
Variable Interest Entity [Line Items]              
Ownership percentage         50.00%    
Subordinated debt     8,400,000   $ 8,400,000    
AerCap Partners II [Member] | AerCap Holdings N.V.              
Variable Interest Entity [Line Items]              
Subordinated debt     8,400,000   $ 8,400,000    
Aercap Partners 767 [Member]              
Variable Interest Entity [Line Items]              
Ownership percentage         50.00%    
Subordinated debt     31,000,000   $ 31,000,000    
Senior debt facility     11,500,000   $ 11,500,000    
Aercap Partners 767 [Member] | Deucalion Aviation Funds [Member]              
Variable Interest Entity [Line Items]              
Ownership percentage         50.00%    
Subordinated debt     15,500,000   $ 15,500,000    
Aercap Partners 767 [Member] | AerCap Holdings N.V.              
Variable Interest Entity [Line Items]              
Subordinated debt     $ 15,500,000   $ 15,500,000    
Aercap Partners 767 [Member] | AerCap Holdings N.V. | Boeing 767 300ER Aircraft [Member]              
Variable Interest Entity [Line Items]              
Number of aircraft | aircraft     2   2    
Aercap Partners 767 [Member] | China Aviation Supplies Holding Company [Member]              
Variable Interest Entity [Line Items]              
Ownership percentage         50.00%    
AerFunding [Member] | Boeing 737 NG Aircraft [Member]              
Variable Interest Entity [Line Items]              
Number of aircraft | aircraft     6   6    
AerFunding [Member] | Airbus 320 Family Aircraft [Member]              
Variable Interest Entity [Line Items]              
Number of aircraft | aircraft     4   4    
AerFunding [Member] | Airbus 320 neoFamily Aircraft [Member]              
Variable Interest Entity [Line Items]              
Number of aircraft | aircraft     2   2    
AerFunding [Member] | Airbus 330 Aircraft [Member]              
Variable Interest Entity [Line Items]              
Number of aircraft | aircraft     1   1    
AerFunding [Member] | Airbus 350 Aircraft [Member]              
Variable Interest Entity [Line Items]              
Number of aircraft | aircraft     1   1    
AerFunding [Member] | Boeing 787 Aircraft [Member]              
Variable Interest Entity [Line Items]              
Number of aircraft | aircraft     4   4    
AerFunding [Member] | AerCap Holdings N.V.              
Variable Interest Entity [Line Items]              
Subordinated debt     $ 272,800,000   $ 272,800,000    
Credit facility amount outstanding     878,400,000   $ 878,400,000    
AerDragon [Member]              
Variable Interest Entity [Line Items]              
Ownership percentage         50.00%    
AerDragon [Member] | Secured Debt [Member]              
Variable Interest Entity [Line Items]              
Debt guarantees     $ 0   $ 0 3,400,000  
AerDragon [Member] | Narrowbody Aircraft [Member]              
Variable Interest Entity [Line Items]              
Number of aircraft | aircraft     29   29    
Number of airlines | airline         10    
AerLift [Member]              
Variable Interest Entity [Line Items]              
Debt guarantees     $ 104,900,000   $ 104,900,000 $ 122,000,000  
AerLift [Member] | Widebody Aircraft [Member]              
Variable Interest Entity [Line Items]              
Number of aircraft | aircraft     4   4    
AerLift [Member] | AerCap Holdings N.V.              
Variable Interest Entity [Line Items]              
Ownership percentage         39.00%    
Peregrine [Member]              
Variable Interest Entity [Line Items]              
Ownership percentage         9.50%    
Number of aircraft acquired | aircraft     4        
Number of aircraft | aircraft     21   21    
Peregrine [Member] | Scenario, Forecast [Member]              
Variable Interest Entity [Line Items]              
Number of aircraft acquired | aircraft       17