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

Debt (SkyFunding Facility) (Details)

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Debt (SkyFunding Facility) (Details) (USD $)
12 Months Ended 12 Months Ended
Mar. 23, 2012
Dec. 31, 2011
Dec. 31, 2011
SkyFunding Facility [Member]
Oct. 24, 2011
AerCap Ireland [Member]
SkyFunding Facility [Member]
Dec. 31, 2011
LIBOR Plus Margin 2.85 [Member]
SkyFunding Facility [Member]
Dec. 31, 2011
Before First Anniversary [Member]
SkyFunding Facility [Member]
Dec. 31, 2011
After First And Before Second Anniversary [Member]
SkyFunding Facility [Member]
Dec. 31, 2011
After The Second And Before The Third Anniversary [Member]
SkyFunding Facility [Member]
Dec. 31, 2011
Boeing 737-800 [Member]
Dec. 31, 2011
Purchase-Leaseback [Member]
Boeing 737-800 [Member]
Debt Instrument [Line Items]                    
Credit facility, amount       $ 402,000,000            
Aggregate principal amount of the senior loans outstanding     133,700,000              
Undrawn senior commitment available for drawdown under the facility     268,000,000              
Number of aircraft   251             12 31
Aircraft pledged to lenders under the loan facility     $ 200,000,000              
Credit facility expiration period     ten-year              
Number of aircraft delivered 4   4              
Total number of aircraft delivered 8                  
Total number of aircraft ordered     12              
One month LIBOR plus a margin         2.85%          
Debt, weighted average interest rate     4.39%              
Prepayment fee           2.00% 1.50% 1.00%