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Borrowings - Credit Agreements (Details) - USD ($)
Feb. 28, 2026
Feb. 28, 2025
Schedule of Debt [Line Items]    
Short-term borrowings $ 272,000,000.0 $ 806,700,000
Long-term debt, Gross 10,361,200,000  
Letters of credit    
Schedule of Debt [Line Items]    
Outstanding letters of credit 11,300,000 11,300,000
Aggregate principal amount 200,000,000.0 200,000,000.0
Revolving credit facility    
Schedule of Debt [Line Items]    
Short-term borrowings $ 0 $ 0
Interest rate 0.00% 0.00%
SOFR margin 0.00% 0.00%
Remaining borrowing capacity $ 1,966,600,000 $ 1,430,700,000
Aggregate principal amount 2,250,000,000 2,250,000,000
Commercial paper    
Schedule of Debt [Line Items]    
Short-term borrowings $ 272,000,000.0 $ 806,700,000
Interest rate 3.90% 4.70%
Long-term debt, Gross $ 272,100,000  
Aggregate principal amount $ 2,250,000,000 $ 808,000,000.0