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Debt (Narrative) (Details) - USD ($)
$ in Thousands
9 Months Ended
Nov. 30, 2022
Nov. 30, 2021
Feb. 28, 2022
Debt Instrument [Line Items]      
Outstanding Balance $ 17,640,682   $ 18,175,019
Capitalized interest 3,600 $ 5,000  
Credit Facility      
Debt Instrument [Line Items]      
Maximum borrowing capacity 2,000,000    
Unused capacity 2,000,000    
Term Loan [Member]      
Debt Instrument [Line Items]      
Outstanding Balance $ 300,000    
Long-Term Debt, Percentage Bearing Variable Interest, Percentage Rate 4.67%    
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    
October 2021 Term Loan      
Debt Instrument [Line Items]      
Outstanding Balance $ 700,000    
Long-Term Debt, Percentage Bearing Variable Interest, Percentage Rate 4.67%