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

Share-Based Compensation (Schedule Of Restricted Shares/Options Activity) (Details)

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Share-Based Compensation (Schedule Of Restricted Shares/Options Activity) (Details)
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Share-Based Compensation [Abstract]      
Beginning outstanding, Number of Restricted Shares/Options 745,965 2,211,360 2,457,098
Forfeitures, Number of Restricted Shares/Options      (245,738)
Exercises of Cerberus Funds shares/options for direct holdings of AerCap shares, Number of Restricted Shares/Options   (1,465,395)  
Ending outstanding, Number of Restricted Shares/Options 745,965 745,965 2,211,360