Lease Rental Revenues and Flight Equipment Held for Lease (Details 3) - aircraft
6 Months Ended 12 Months Ended
Aug. 31, 2021
Feb. 28, 2021
Oct. 08, 2021
Revenues from External Customers and Long-Lived Assets [Line Items]      
Number of Aircraft 255 252  
Number of Offlease Aircraft Marketed for Lease or Sale   16  
Number of Offlease Aircraft Marketed for Lease 17    
Asia and Pacific      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Number of Aircraft 74 79  
Europe      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Number of Aircraft 96 92  
Middle East and Africa      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Number of Aircraft 10 11  
North America      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Number of Aircraft 33 28  
South America      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Number of Aircraft 25 26  
Geographic Concentration Risk | Net Book Value      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Percentage of geographic concentration 100.00% 100.00%  
Geographic Concentration Risk | Net Book Value | Asia and Pacific      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Percentage of geographic concentration 33.00% 37.00%  
Geographic Concentration Risk | Net Book Value | Europe      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Percentage of geographic concentration 29.00% 27.00%  
Geographic Concentration Risk | Net Book Value | Middle East and Africa      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Percentage of geographic concentration 4.00% 4.00%  
Geographic Concentration Risk | Net Book Value | North America      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Percentage of geographic concentration 15.00% 12.00%  
Geographic Concentration Risk | Net Book Value | South America      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Percentage of geographic concentration 13.00% 13.00%  
Geographic Concentration Risk | Net Book Value | Off Lease      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Percentage of geographic concentration 6.00% 7.00%  
Wide-body [Member] | Subsequent Event      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Number of Offlease Aircraft Marketed for Lease or Sale     3
Narrow-body [Member] | Subsequent Event      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Number of Offlease Aircraft Marketed for Lease or Sale     2