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

Debt (AerFunding revolving credit facility and credit agreement) (Details)

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Debt (AerFunding revolving credit facility and credit agreement) (Details) - AerFunding Revolving Credit Facility - USD ($)
12 Months Ended
Dec. 11, 2017
Dec. 31, 2019
Dec. 31, 2018
Debt Instrument [Line Items]      
Credit facility maximum borrowing capacity     $ 2,500,000,000
Revolving Period      
Debt Instrument [Line Items]      
Debt instrument term 3 years    
Term Out Period      
Debt Instrument [Line Items]      
Debt instrument term 2 years    
Charitable Trust      
Debt Instrument [Line Items]      
Ownership percentage   95.00%  
AerCap Ireland      
Debt Instrument [Line Items]      
Ownership percentage   5.00%