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Retirement Plans - Narrative (Details) - USD ($) | 6 Months Ended
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Apr. 30, 2021 | Apr. 30, 2020
Retirement Benefits [Abstract] |  |
Average earnings period | 5 years |
Funding contributions | $ 0 | $ 0

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- Definition Defined Benefit Plan, Average Earnings, Term + References No definition available. + Details
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