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Acquisitions and Divestitures - Additional Information (Detail) $ in Millions | 3 Months Ended
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Jan. 31, 2017 USD ($) business | Jan. 31, 2016 USD ($) business
Business Acquisition [Line Items] |  |
Number of divestitures (business) | business | 0 | 0
Number of acquisitions (business) | business | 0 | 0
Loss on disposal of businesses, net | $ 0.5 | $ 0.0
Proceeds from divestitures | $ 0.8 | $ 1.0
Minimum |  |
Business Acquisition [Line Items] |  |
Notes receivable term | 8 months |
Maximum |  |
Business Acquisition [Line Items] |  |
Notes receivable term | 23 months |
Notes Receivable |  |
Business Acquisition [Line Items] |  |
Consideration for divestiture | $ 3.8 |
2015 Divestitures |  |
Business Acquisition [Line Items] |  |
Proceeds from divestitures | $ 0.8 |

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