Quarterly report pursuant to Section 13 or 15(d)

Borrowings (Details Textual)

v3.7.0.1
Borrowings (Details Textual) - USD ($)
3 Months Ended
May 31, 2017
Jan. 31, 2008
Senior Credit Facility - Term Loans [Member]    
Schedule of Debt [Line Items]    
Unamortized debt issuance costs, long-term debt obligations $ 10,600,000  
Senior Notes [Member] | May 2017 Senior Notes [Member]    
Schedule of Debt [Line Items]    
Debt instrument, face amount 1,500,000,000  
Proceeds from issuance of long-term debt, net of discount and debt issuance costs $ 1,483,800,000  
Senior Notes [Member] | May 2007 Senior Notes [Member]    
Schedule of Debt [Line Items]    
Debt instrument, face amount   $ 700,000,000
Coupon rate of notes   7.25%