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Revenue Recognition - Additional Information (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Jan. 31, 2019 | Oct. 31, 2018
Disaggregation Of Revenue [Line Items] |  |
Contract asset | $ 29.8 | $ 23.2
Transferred to accounts receivable | 4.1 |
Contract liability | 40.0 | $ 28.1
Remaining performance obligations | 328.2 |
Topic 606 [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Adjustment to net loss | $ 1.3 |

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