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Debt (Narrative) (Details) - USD ($)
$ in Thousands
6 Months Ended
Aug. 31, 2020
Aug. 31, 2019
Feb. 29, 2020
Debt Instrument [Line Items]      
Outstanding Balance $ 14,797,768   $ 14,944,055
Non-recourse notes payable 13,382,375   $ 13,613,272
Capitalized interest 1,400 $ 3,300  
Credit Facility      
Debt Instrument [Line Items]      
Maximum borrowing capacity 1,450,000    
Unused capacity 874,200    
Term Loan [Member]      
Debt Instrument [Line Items]      
Outstanding Balance 300,000    
Senior Notes [Member]      
Debt Instrument [Line Items]      
Outstanding Balance $ 500,000    
Financing obligation | Minimum      
Debt Instrument [Line Items]      
Initial lease terms, in years 15 years    
Financing obligation | Maximum      
Debt Instrument [Line Items]      
Initial lease terms, in years 20 years