Quarterly report pursuant to Section 13 or 15(d)

Borrowings (Details Textual)

v3.8.0.1
Borrowings (Details Textual) - USD ($)
May 31, 2018
Feb. 28, 2018
Schedule of Debt [Line Items]    
Debt instrument, face amount $ 2,000,000,000  
Short-term borrowings 669,700,000 $ 746,800,000
Commercial paper [Member]    
Schedule of Debt [Line Items]    
Debt instrument, face amount 240,000,000  
Short-term borrowings $ 239,700,000 $ 266,900,000
Interest rate 2.40%  
Commercial paper [Member] | Maximum [Member]    
Schedule of Debt [Line Items]    
Debt instrument, face amount $ 1,000,000,000.0