Derivative Instruments (Details) - USD ($)
shares in Millions
 3 Months Ended 12 Months Ended
Nov. 15, 2018
Oct. 31, 2018
Oct. 31, 2018
Oct. 31, 2017
Oct. 31, 2016
Oct. 15, 2018
Sep. 28, 2018
Aug. 30, 2018
Aug. 02, 2017
Jan. 30, 2017
Derivative Instruments, Gain (Loss) [Line Items]                    
Embedded conversion feature   $ 164,212,000 $ 164,212,000 $ 0       $ 152,100,000    
Loss on fair value of debt conversion liability     12,070,000 0 $ 0          
Term Loan Payable due January 30, 2022 | Secured Debt                    
Derivative Instruments, Gain (Loss) [Line Items]                    
Term loan principal amount   $ 700,000,000 $ 700,000,000             $ 400,000,000
Term Loan Payable due September 28, 2025 | Secured Debt                    
Derivative Instruments, Gain (Loss) [Line Items]                    
Term loan principal amount             $ 700,000,000      
3.75% Convertible Senior Notes due October 15, 2018 (New)                    
Derivative Instruments, Gain (Loss) [Line Items]                    
Interest rate on convertible notes   3.75% 3.75%              
3.75% Convertible Senior Notes due October 15, 2018 (New) | Convertible Notes Payable                    
Derivative Instruments, Gain (Loss) [Line Items]                    
Interest rate on convertible notes                 3.75%  
Maximum cash settlement of convertible debt           $ 400,000,000   $ 400,000,000    
Embedded conversion feature   $ 152,100,000 $ 152,100,000              
Maximum                    
Derivative Instruments, Gain (Loss) [Line Items]                    
Foreign exchange contract maturities     24 months              
Foreign Exchange Forward                    
Derivative Instruments, Gain (Loss) [Line Items]                    
Gain on unwounding of interest rate swaps     $ (1,674,000) (295,000) (823,000)          
Interest Rate Swap                    
Derivative Instruments, Gain (Loss) [Line Items]                    
Gain on unwounding of interest rate swaps     6,199,000 6,185,000 $ (445,000)          
Designated as Hedging Instrument | Foreign Exchange Forward | Cash Flow Hedging                    
Derivative Instruments, Gain (Loss) [Line Items]                    
Notional principal of contract   163,200,000 $ 163,200,000 86,100,000            
Designated as Hedging Instrument | Foreign Exchange Forward | Cash Flow Hedging | Maximum                    
Derivative Instruments, Gain (Loss) [Line Items]                    
Foreign exchange contract maturities     24 months              
Designated as Hedging Instrument | Interest Rate Swap | Cash Flow Hedging | Term Loan Payable due January 30, 2022 | Secured Debt                    
Derivative Instruments, Gain (Loss) [Line Items]                    
Gain on unwounding of interest rate swaps   6,800,000                
Designated as Hedging Instrument | Interest Rate Swap | Cash Flow Hedging | Term Loan Payable due September 28, 2025 | Secured Debt                    
Derivative Instruments, Gain (Loss) [Line Items]                    
Notional principal of contract   $ 350,000,000 $ 350,000,000              
Interest rate swap fix   50.00% 50.00%              
Fixed interest amount resulting from interest rate swap   2.957% 2.957%              
Not Designated as Hedging Instrument | Foreign Exchange Forward                    
Derivative Instruments, Gain (Loss) [Line Items]                    
Notional principal of contract   $ 162,600,000 $ 162,600,000 $ 83,400,000            
Not Designated as Hedging Instrument | Foreign Exchange Forward | Maximum                    
Derivative Instruments, Gain (Loss) [Line Items]                    
Foreign exchange contract maturities     12 months              
Subsequent Event | 3.75% Convertible Senior Notes due October 15, 2018 (New) | Convertible Notes Payable                    
Derivative Instruments, Gain (Loss) [Line Items]                    
Cash paid for embedded conversion feature $ 111,300,000                  
Shares issued for embedded conversion feature (in shares) 1.6