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Debt (Narrative) (Details) - USD ($)
$ in Thousands
9 Months Ended
Nov. 30, 2019
Nov. 30, 2018
Feb. 28, 2019
Debt Instrument [Line Items]      
Non-recourse notes payable $ 13,320,447   $ 12,535,405
Capitalized interest 5,000 $ 4,800  
Credit Facility      
Debt Instrument [Line Items]      
Maximum borrowing capacity 1,450,000    
Unused capacity 1,070,000    
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