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Employee Benefits - Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income (Details) - USD ($) $ in Millions | 12 Months Ended
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Oct. 31, 2022 | Oct. 31, 2021 | Oct. 31, 2020
Other changes in plan assets and benefit obligations recognized in other comprehensive income: |  |  |
Net (gain) loss | $ (34.1) | $ (24.4) | $ 20.8
Amortizations of net gain | (2.5) | (5.4) | (4.0)
Total recognized in other comprehensive (income) loss | (36.6) | (29.8) | 16.8
Total recognized in net periodic benefit cost and other comprehensive (income) loss | $ (26.2) | $ (15.2) | $ 29.0

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