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Organization - Additional Information (Detail) - USD ($) $ in Millions | 9 Months Ended |
--- | --- | ---
Jan. 31, 2020 | Oct. 31, 2020
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |
Restructuring and related activities, description | Pending final approval of our Board of Directors, customary regulatory approvals, and tax and legal considerations, the spin-off is expected to be completed in the second half of calendar 2020 and would create two independent publicly traded companies: |
General and Administrative Expenses |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |
Costs associated with spin-off | $ 1.2 |
Minimum |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |
Expected restructuring charges | 9.0 |
Minimum | Scenario Forecast |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |
Expected restructuring charges |  | $ 9.0
Maximum |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |
Expected restructuring charges | $ 12.0 |
Maximum | Scenario Forecast |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |
Expected restructuring charges |  | $ 12.0

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