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Commitments and Contingencies - Additional Information (Details) - USD ($) $ in Millions					9 Months Ended
	Oct. 31, 2020	Sep. 14, 2020	Jun. 28, 2020	Apr. 27, 2020	Jul. 31, 2021
Commitments And Contingencies [Line Items]
Recorded unconditional purchase obligation					$ 78.1
Loss contingency, damages sought	$ 880.0
Accounts receivable outstanding					9.6
Posco Energy
Commitments And Contingencies [Line Items]
Loss contingency, damages sought			$ 200.0	$ 3.3
Unspecified warranty claims				7.0
License termination				$ 110.0
Bond amount					$ 46.0
Loss contingency, claimed Loss		$ 1.0

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- Definition

Accounts receivable includes outstanding receivables.

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- Definition

The amount of a bond posted to cover damages.

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Commitments and contingencies.

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- Definition

Product liability contingency license termination.

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- Definition

The value (monetary amount) of the award the plaintiff seeks in the legal matter.

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- Definition

The amount of loss pertaining to the specified contingency that was charged against earnings in the period, including the effects of revisions in previously reported estimates.

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- Definition

Amount of the recorded obligation to transfer funds in the future for fixed or minimum amounts or quantities of goods or services at fixed or minimum prices (for example, as in take-or-pay contracts or throughput contracts).

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