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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 |  |  |

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