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Acquisitions and Divestitures - Additional Information (Details) - USD ($) $ in Millions |  | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Feb. 11, 2019 | Oct. 31, 2020 | Oct. 31, 2019 | Oct. 31, 2020 | Oct. 31, 2019 | Oct. 31, 2018
Business Acquisition [Line Items] |  |  |  |  |  |
Goodwill |  | $ 1,518.4 | $ 1,517.8 | $ 1,518.4 | $ 1,517.8 | $ 776.0
Proceeds from Divestiture of Businesses |  |  |  | 80.9 | $ 1.5 | $ 1.4
2020 Divestiture |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Cash acquired |  |  |  | 79.6 |  |
Goodwill |  | 35.6 |  | 35.6 |  |
Proceeds from Divestiture of Businesses |  |  |  | 85.0 |  |
Preliminary adjustments |  | 5.4 |  | 5.4 |  |
Caraustar |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Payments to acquire business | $ 1,834.9 |  |  |  |  |
Deferred tax liability, |  | 14.6 | $ 37.4 |  |  |
Goodwill | 752.5 | $ 743.9 |  | 743.9 |  |
Cash consideration | $ 1,834.9 |  |  | $ 1,834.9 |  |
Buildings | Minimum |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Useful life |  |  |  | 30 years |  |
Buildings | Minimum | Caraustar |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Useful life |  |  |  | 1 year |  |
Buildings | Maximum |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Useful life |  |  |  | 40 years |  |
Buildings | Maximum | Caraustar |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Useful life |  |  |  | 20 years |  |
Machinery and equipment | Minimum |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Useful life |  |  |  | 5 years |  |
Machinery and equipment | Minimum | Caraustar |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Useful life |  |  |  | 1 year |  |
Machinery and equipment | Maximum |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Useful life |  |  |  | 15 years |  |
Machinery and equipment | Maximum | Caraustar |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Useful life |  |  |  | 15 years |  |

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