Employee Benefits - Fair Value Measurement of Plan Assets (Details) - USD ($) $ in Millions	Oct. 31, 2023	Oct. 31, 2022	Oct. 31, 2021	Oct. 31, 2020
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value of plan assets	$ 137.6	$ 142.9	$ 199.5	$ 159.5
Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value of plan assets	113.6
Significant Observable Inputs (Level 2)
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value of plan assets	24.0
Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value of plan assets	0.0
Cash and cash equivalents
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value of plan assets	3.9
Cash and cash equivalents | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value of plan assets	3.9
Cash and cash equivalents | Significant Observable Inputs (Level 2)
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value of plan assets	0.0
Cash and cash equivalents | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value of plan assets	0.0
Corporate common stock
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value of plan assets	35.8
Corporate common stock | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value of plan assets	35.8
Corporate common stock | Significant Observable Inputs (Level 2)
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value of plan assets	0.0
Corporate common stock | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value of plan assets	0.0
Equity mutual funds
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value of plan assets	53.9
Equity mutual funds | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value of plan assets	53.9
Equity mutual funds | Significant Observable Inputs (Level 2)
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value of plan assets	0.0
Equity mutual funds | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value of plan assets	0.0
Balanced funds
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value of plan assets	3.3
Balanced funds | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value of plan assets	3.3
Balanced funds | Significant Observable Inputs (Level 2)
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value of plan assets	0.0
Balanced funds | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value of plan assets	0.0
Alternative investments
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value of plan assets	0.9
Alternative investments | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value of plan assets	0.9
Alternative investments | Significant Observable Inputs (Level 2)
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value of plan assets	0.0
Alternative investments | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value of plan assets	0.0
Fixed Income Investments
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value of plan assets	39.8
Fixed Income Investments | Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value of plan assets	15.8
Fixed Income Investments | Significant Observable Inputs (Level 2)
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value of plan assets	24.0
Fixed Income Investments | Significant Unobservable Inputs (Level 3)
Defined Benefit Plan, Plan Assets, Category [Line Items]
Fair value of plan assets	$ 0.0