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, 2014
USD ($)
item
Dec. 31, 2015
USD ($)
item
General [Line Items]        
Total Assets | $     $ 43,867,380 $ 43,914,479
Number of aircraft | item       1,109
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]        
General [Line Items]        
Ownership percentage   0.00%    
AIG [Member] | AerCap Holdings N.V. [Member]        
General [Line Items]        
Number of ordinary shares sold in secondary offering | shares 71,184,686 10,677,702    
Ordinary shares, acquired | shares 15,698,588