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Revenue Recognition - Additional Information (Details) - USD ($) $ in Millions | Jan. 31, 2021 | Oct. 31, 2020
--- | --- | ---
Disaggregation Of Revenue [Line Items] |  |
Contract asset | $ 20.4 | $ 16.9
Contract liability | 44.3 | $ 41.9
Advanced Technologies Contracts [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Remaining performance obligations | 44.1 |
Service Agreements [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Remaining performance obligations | 141.7 |
Licensing Agreements [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Remaining performance obligations | 22.2 |
Posco Energy [Member] |  |
Disaggregation Of Revenue [Line Items] |  |
Deferred revenue | $ 22.2 |

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