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

General (Company, AIG Offering And The Share Repurchase, And Genesis Funding Limited Transaction) (Narrative) (Details)

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General (Company, AIG Offering And The Share Repurchase, And Genesis Funding Limited Transaction) (Narrative) (Details)
$ in Thousands
1 Months Ended 12 Months Ended
Jun. 09, 2015
shares
Aug. 24, 2015
shares
Dec. 31, 2016
USD ($)
item
shares
Dec. 31, 2014
USD ($)
item
Dec. 31, 2015
USD ($)
General [Line Items]          
Total Assets | $     $ 41,620,453   $ 43,749,499
Ordinary shares, acquired     25,012,978    
Number of aircraft | item     1,022    
GFL [Member]          
General [Line Items]          
Total Assets | $       $ 727,000  
Number of aircraft | item       37  
Sale of Class A common shares, percentage of ownership before transaction       100.00%  
AIG [Member] | AerCap Holdings N.V. [Member]          
General [Line Items]          
Number of ordinary shares sold in secondary offering 71,184,686 10,677,702      
Ordinary shares, acquired 15,698,588