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Revenue Recognition - Contract Balances (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2022	Oct. 31, 2021	Jan. 31, 2022
Disaggregation Of Revenue [Line Items]
Contract asset	$ 20.7	$ 20.5
Long-term	9.7	11.6
Transferred to accounts receivable	5.3	5.2
Contract liability	$ 25.4	36.7
Posco Energy
Disaggregation Of Revenue [Line Items]
Deferred revenue		$ 22.2	$ 22.2

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