XML 43 R61.htm IDEA: XBRL DOCUMENT v3.2.0.727
Long-Term Debt (Details Textuals) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Dec. 03, 2014
Apr. 30, 2016
Jul. 31, 2015
Jul. 31, 2015
Sep. 29, 2011
Dec. 14, 2010
Line of Credit Facility [Line Items]            
Applicable interest rate added to reference rate in order to compute variable interest rate       1.25%    
Reference rate     0.19% 0.19%    
Debt instrument costs $ 2.1          
Capitalized debt issuance fees 1.0          
Debt discount 1.1          
Federal Funds Rate            
Line of Credit Facility [Line Items]            
Applicable interest rate added to reference rate in order to compute variable interest rate       0.50%    
LIBOR            
Line of Credit Facility [Line Items]            
Applicable interest rate added to reference rate in order to compute variable interest rate       1.00%    
Adjusted LIBOR One | Minimum            
Line of Credit Facility [Line Items]            
Applicable interest rate added to reference rate in order to compute variable interest rate       0.25%    
Adjusted LIBOR One | Maximum            
Line of Credit Facility [Line Items]            
Applicable interest rate added to reference rate in order to compute variable interest rate       1.00%    
Adjusted LIBOR Two | Revolving Credit Facility | Minimum            
Line of Credit Facility [Line Items]            
Applicable interest rate added to reference rate in order to compute variable interest rate       1.25%    
Adjusted LIBOR Two | Revolving Credit Facility | Maximum            
Line of Credit Facility [Line Items]            
Applicable interest rate added to reference rate in order to compute variable interest rate       2.00%    
Line of Credit | Revolving Credit Facility | Minimum            
Line of Credit Facility [Line Items]            
Commitment fee rate range       0.20%    
Line of Credit | Revolving Credit Facility | Maximum            
Line of Credit Facility [Line Items]            
Commitment fee rate range       0.35%    
Senior Notes            
Line of Credit Facility [Line Items]            
Senior notes 400.0          
Bank of America | Line of Credit            
Line of Credit Facility [Line Items]            
Maximum borrowing capacity           $ 100.0
Repayments of lines of credit 275.0          
Bank of America | Line of Credit | Alternative Currency Borrowing Credit Facility            
Line of Credit Facility [Line Items]            
Maximum borrowing capacity           100.0
Bank of America | Line of Credit | Letter of Credit            
Line of Credit Facility [Line Items]            
Maximum borrowing capacity           50.0
Bank of America | Line of Credit | Term Loan Facility            
Line of Credit Facility [Line Items]            
Maximum borrowing capacity         $ 500.0 $ 400.0
Wells Fargo and Bank of America            
Line of Credit Facility [Line Items]            
Maturity date       Dec. 03, 2019    
Wells Fargo and Bank of America | Line of Credit | Revolving Credit Facility            
Line of Credit Facility [Line Items]            
Maximum borrowing capacity 300.0          
Outstanding borrowings 0.0   $ 0.0 $ 0.0    
Wells Fargo and Bank of America | Line of Credit | Term Loan Facility            
Line of Credit Facility [Line Items]            
Maximum borrowing capacity 300.0          
Outstanding borrowings     243.8 $ 243.8    
Amortization of financing costs     $ 18.8      
Wells Fargo and Bank of America | Line of Credit | Forecast | Term Loan Facility            
Line of Credit Facility [Line Items]            
Amortization of financing costs   $ 7.5        
4.07% Senior Notes, Series A | Senior Notes            
Line of Credit Facility [Line Items]            
Senior notes $ 100.0          
Stated interest rate 4.07%          
4.19% Senior Notes, Series B | Senior Notes            
Line of Credit Facility [Line Items]            
Senior notes $ 100.0          
Stated interest rate 4.19%          
4.25% Senior Notes, Series C | Senior Notes            
Line of Credit Facility [Line Items]            
Senior notes $ 100.0          
Stated interest rate 4.25%          
4.35% Senior Notes, Series D | Senior Notes            
Line of Credit Facility [Line Items]            
Senior notes $ 100.0          
Stated interest rate 4.35%