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Revenue Recognition - Additional Information (Details) - USD ($) $ in Millions | Jul. 31, 2021 | Oct. 31, 2020
--- | --- | ---
Disaggregation Of Revenue [Line Items] |  |
Contract asset | $ 22.3 | $ 16.9
Contract liability | 37.4 | $ 41.9
Service agreements |  |
Disaggregation Of Revenue [Line Items] |  |
Remaining performance obligations | 127.0 |
Licensing agreements |  |
Disaggregation Of Revenue [Line Items] |  |
Remaining performance obligations | 22.2 |
Advanced technologies contracts |  |
Disaggregation Of Revenue [Line Items] |  |
Remaining performance obligations | 40.0 |
Posco Energy |  |
Disaggregation Of Revenue [Line Items] |  |
Deferred revenue | $ 22.2 |

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