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Debt (Narrative) (Details)
6 Months Ended 12 Months Ended
Nov. 01, 2017
USD ($)
Mar. 01, 2016
USD ($)
Apr. 30, 2018
USD ($)
Oct. 31, 2017
USD ($)
Line of Credit Facility [Line Items]        
Term loans     $ 2,255,000,000 $ 830,000,000
Required minimum Interest coverage ratio     3.00  
Required maximum total leverage ratio     3.75  
Interest coverage ratio     15.68  
Total leverage ratio     2.67  
Minimum        
Line of Credit Facility [Line Items]        
Commitment fee percentage   0.125%    
Maximum        
Line of Credit Facility [Line Items]        
Commitment fee percentage   0.25%    
2016 Credit Agreement        
Line of Credit Facility [Line Items]        
Line of credit facility, potential additional borrowing capacity   $ 750,000,000    
Revolving Credit Facility        
Line of Credit Facility [Line Items]        
Aggregate commitment amount of credit facility   $ 1,000,000,000.0    
2016 Credit Agreement        
Line of Credit Facility [Line Items]        
Line of credit facility, initiation date   Mar. 01, 2016    
Term loans   $ 830,000,000    
Line of credit facility interest rate margin on base rate loans percentage   1.00%    
Line of credit facility interest rate margin on foreign currency loans percentage   1.75%    
Amount available under the credit agreement     $ 805,700,000  
2016 Credit Agreement | Federal Funds Rate        
Line of Credit Facility [Line Items]        
Debt instrument, basis spread on variable rate   0.00%    
2016 Credit Agreement | Eurodollar        
Line of Credit Facility [Line Items]        
Debt instrument, basis spread on variable rate   0.75%    
Line of Credit        
Line of Credit Facility [Line Items]        
Debt instrument, maturity date   Mar. 01, 2021    
Two Thousand Seventeen Term Loan Agreement | Base Rate | Minimum        
Line of Credit Facility [Line Items]        
Debt instrument, basis spread on variable rate       0.00%
Two Thousand Seventeen Term Loan Agreement | Base Rate | Maximum        
Line of Credit Facility [Line Items]        
Debt instrument, basis spread on variable rate       0.75%
Two Thousand Seventeen Term Loan Agreement | London Interbank Offered Rate (LIBOR) | Minimum        
Line of Credit Facility [Line Items]        
Debt instrument, basis spread on variable rate       1.00%
Two Thousand Seventeen Term Loan Agreement | London Interbank Offered Rate (LIBOR) | Maximum        
Line of Credit Facility [Line Items]        
Debt instrument, basis spread on variable rate       1.75%
Senior Unsecured Term Loan Agreement | Senior Notes        
Line of Credit Facility [Line Items]        
Debt term 5 years      
Debt instrument, face amount $ 1,425,000,000.000      
Amount outstanding on credit agreement     $ 830,000,000