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Basis of Presentation and Summary of Significant Accounting Policies - Basis of Presentation (Details)
$ / shares in Units, $ in Thousands
3 Months Ended 9 Months Ended
Jul. 26, 2016
$ / shares
shares
Jul. 21, 2016
shares
Jul. 31, 2016
USD ($)
segment
Jul. 31, 2016
USD ($)
segment
Dec. 24, 2013
Subsidiary, Sale of Stock [Line Items]          
Number of discontinued operating segments | segment     2 2  
Number of reportable segments | segment       3  
Restatement Adjustment [Member]          
Subsidiary, Sale of Stock [Line Items]          
Increase in other comprehensive income | $     $ 21,500 $ 21,500  
Reduction of accounts payable and accrued liabilities | $     $ 21,500 $ 21,500  
JLL          
Subsidiary, Sale of Stock [Line Items]          
Ownership percentage (as percent) 39.00%       51.00%
Koninklijke DSM          
Subsidiary, Sale of Stock [Line Items]          
Ownership percentage (as percent) 34.00%       49.00%
JLL/Delta Patheon Holdings [Member]          
Subsidiary, Sale of Stock [Line Items]          
Ownership percentage (as percent) 4.00%        
IPO          
Subsidiary, Sale of Stock [Line Items]          
Issuance of ordinary shares (in shares) | shares 29,464,286        
Share price (in USD per share) | $ / shares $ 21.00        
Percentage of voting stock owned by the public 23.00%        
IPO | Koninklijke DSM          
Subsidiary, Sale of Stock [Line Items]          
Issuance of ordinary shares (in shares) | shares 4,761,905 4,761,905