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

General (Variable Interest Entities) (Narrative) (Details)

v2.4.0.6
General (Variable Interest Entities) (Narrative) (Details) (USD $)
Share data in Millions, except Per Share data, unless otherwise specified
9 Months Ended 12 Months Ended 0 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended 12 Months Ended 0 Months Ended 12 Months Ended 0 Months Ended 0 Months Ended 1 Months Ended
Oct. 07, 2011
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Dec. 31, 2008
Dec. 31, 2007
Mar. 25, 2010
AerCap Holdings N.V. [Member]
Sep. 17, 2009
AerCap Holdings N.V. [Member]
Dec. 31, 2011
AerCap Holdings N.V. [Member]
Jun. 30, 2008
AerCap Holdings N.V. [Member]
Dec. 31, 2011
China Aviation's Ownership Percentage In AerDragon [Member]
Dec. 31, 2011
AerCap Holdings' Ownership Percentage In AerDragon [Member]
Dec. 31, 2011
AerDragon [Member]
Jun. 30, 2008
AerCap Partners I [Member]
Dec. 31, 2010
Joint Venture Partner [Member]
Jun. 30, 2008
Joint Venture Partner [Member]
Dec. 31, 2010
Waha Capital PJSC [Member]
Dec. 31, 2011
Waha Capital PJSC [Member]
Oct. 07, 2011
AeroTurbine, Inc [Member]
Dec. 31, 2011
AeroTurbine, Inc [Member]
Dec. 31, 2010
A320 Aircraft [Member]
Dec. 31, 2010
CRJ Aircraft [Member]
Jun. 01, 2011
A330 Wide-Body Aircraft [Member]
Dec. 31, 2010
A330 Wide-Body Aircraft [Member]
Nov. 11, 2010
AerVenture [Member]
Nov. 11, 2010
Waha [Member]
Nov. 11, 2010
CRJ Aircraft [Member]
Sep. 17, 2009
Genesis [Member]
Mar. 25, 2010
Genesis [Member]
Mar. 25, 2011
Genesis [Member]
Schedule Of General [Line Items]                                                            
Ownership percentage                     50.00% 25.00%   50.00% 50.00%   40.00%                          
Number of aircraft owned   251                     17   10     10     3 4   3     4      
Maximum loss exposure, equity investment, amount   $ 36,500,000                                                        
Maximum loss exposure, debt guaranteed, amount   21,800,000                                                        
Maximum loss exposure, amount   58,300,000                                                        
Number of aircraft acquired                           19                                
Senior debt facility                           425,700,000                                
Subordinated debt                   62,800,000       125,600,000   62,800,000                            
Equity investment, ownership percentage                 25.00%       25.00%       40.00%                 40.00% 50.00%      
Purchase price for all shares of AeroTurbine                                     228,000,000                      
Loss on discontinued operations (AeroTurbine) (52,745,000) (52,745,000) (3,199,000) [1],[2],[3],[4] 2,731,000 [1],[2] 1,447,000 13,164,000                           52,800,000                    
Fees and incentive payments incurred due to AeroTurbine transaction                                       22,500,000                    
Write-off of deferred tax asset                                       8,700,000                    
Loss on sale of business                                       21,600,000                    
Amalgamation gain     274,000 [1],[2],[3],[4]                                                   274,000  
Trading price of common shares, per share             $ 10.83 $ 8.81                                       $ 8.45    
Total consideration paid                                                           372,300,000
Fair market value of net assets acquired                                                           403,400,000
New shares issued for acquisition                                                   29.8        
Cash received for shares issued                                                   105,000,000        
Interest in the joint venture company                                             50.00%   50.00%   50.00%      
Minority interest in the joint venture company                                                 50.00%          
Increase in cash position due to AeroTurbine sale   $ 119,917,000                                                        
[1] As a result of the sale of AeroTurbine and based on ASC 205-20, which governs financials statements for discontinued operations, the results of AeroTurbine have been reclassified to discontinued operations.
[2] Certain reclassifications have been made to prior years' Consolidated Income Statements to reflect the current year presentation.
[3] Includes the results of Genesis for the period from March 25, 2010 (date of acquisition) to December 31, 2010.
[4] Includes the results of Genesis Lease Limited ("Genesis") for the period from March 25, 2010 (date of acquisition) to December 31, 2010 and the issue of shares to Genesis and Waha Capital PJSC ("Waha").