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Stock Based Compensation - Management Equity Incentive Plan (MEIP) (Details)
$ / shares in Units, $ in Millions
3 Months Ended 9 Months Ended
Jul. 26, 2016
$ / shares
shares
Jul. 31, 2016
USD ($)
$ / shares
Jul. 31, 2015
USD ($)
Jul. 31, 2016
USD ($)
tranche
$ / shares
Jul. 31, 2015
USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock-based compensation expense   $ 13.2 $ 3.5 $ 16.2 $ 11.3
Restricted Stock Units          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock-based compensation expense   0.5 0.0 0.5 0.0
Compensation costs not yet recognized   9.0   $ 9.0  
IPO          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share price (in USD per share) | $ / shares $ 21.00        
IPO | Restricted Stock Units          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period 3 years        
Share price (in USD per share) | $ / shares $ 21.00        
Management Equity Incentive Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of valuation tranches | tranche       5  
Stock-based compensation expense   $ 12.5 $ 3.5 $ 15.5 $ 11.3
Management Equity Incentive Plan | Stock-based Compensation          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Shares distributed to be held for MEIP participants | shares 6,106,540        
Management Equity Incentive Plan | Restricted Stock Units          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period       5 years  
Restricted Share Units under the Omnibus Plan | shares 3,388,481        
Share price target | $ / shares   $ 48.47   $ 48.47  
Estimated fair value of MEIP RSU's | $ / shares   $ 8.41      
Stock-based compensation expense       $ 0.1  
Management Equity Incentive Plan | IPO | Stock-based Compensation          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Share price (in USD per share) | $ / shares $ 21.00        
Management Equity Incentive Plan | Class B          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Threshold percentage of ownership of equity securities for Exit Event       20.00%  
Percentage of excess capital contributions received to trigger an Exit Event   250.00%   250.00%  
Compensation costs not yet recognized   $ 32.7   $ 32.7  
Compensation costs not yet recognized, to be recognized before Exit Event       $ 4.2  
Management Equity Incentive Plan | Class B | Stock-based Compensation          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Percent of service-based units       71.40%  
Vesting period       4 years  
Stock-based compensation expense   1.8   $ 4.8  
Compensation costs not yet recognized   13.9   $ 13.9  
Management Equity Incentive Plan | Class B | Restricted Stock Units          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock-based compensation expense   0.1      
Management Equity Incentive Plan | Class C          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Class C, class D, and class E vesting thresholds       200.00%  
Management Equity Incentive Plan | Class D          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Class C, class D, and class E vesting thresholds       250.00%  
Management Equity Incentive Plan | Class E          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Class C, class D, and class E vesting thresholds       300.00%  
Management Equity Incentive Plan | Common Class C, Class D, Class E Stock          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock-based compensation expense   0.1      
Compensation costs not yet recognized   11.4   $ 11.4  
Management Equity Incentive Plan | Common Class C, Class D, Class E Stock | Stock-based Compensation          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock-based compensation expense   9.0      
Management Equity Incentive Plan | Common Class C, Class D, Class E Stock | Restricted Stock Units          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock-based compensation expense   $ 1.5