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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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-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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