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Acquisitions and Divestitures - Additional Information (Details) $ in Millions |  |  |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Oct. 31, 2019 USD ($) | Jun. 11, 2019 USD ($) | Feb. 11, 2019 USD ($) | Oct. 31, 2019 USD ($) | Jul. 31, 2019 USD ($) | Apr. 30, 2019 USD ($) | Jan. 31, 2019 USD ($) | Oct. 31, 2018 USD ($) | Jul. 31, 2018 USD ($) | Apr. 30, 2018 USD ($) | Jan. 31, 2018 USD ($) | Oct. 31, 2019 USD ($) subsidiary business | Oct. 31, 2018 USD ($) liquidation Divestiture | Oct. 31, 2017 USD ($) subsidiary business
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt | $ 2,659.0 |  |  | $ 2,659.0 |  |  |  | $ 884.1 |  |  |  | $ 2,659.0 | $ 884.1 |
Other long-term assets | 90.9 |  |  | 90.9 |  |  |  | 100.4 |  |  |  | 90.9 | 100.4 |
Net income |  |  |  | 69.8 | $ 67.5 | $ 21.1 | $ 35.8 | 45.5 | $ 72.0 | $ 51.9 | $ 60.1 | 194.2 | $ 229.5 | $ 135.1
Number of divestitures | Divestiture |  |  |  |  |  |  |  |  |  |  |  |  | 0 |
Gain on disposal of businesses |  |  |  |  |  |  |  |  |  |  |  | $ (3.7) | $ 0.8 | $ (1.7)
Notes receivable recorded from sale of business |  |  |  |  |  |  |  | $ 2.9 |  |  |  |  | 2.9 |
Rigid Industrial Packaging & Services |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of divestitures | business |  |  |  |  |  |  |  |  |  |  |  |  |  | 2
Number of subsidiaries liquidated | subsidiary |  |  |  |  |  |  |  |  |  |  |  |  |  | 2
Number of businesses, nonstrategic | business |  |  |  |  |  |  |  |  |  |  |  |  |  | 1
Loss on disposal |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1.7
Proceeds from divestiture and deconsolidation |  |  |  |  |  |  |  |  |  |  |  |  |  | 5.1
Rigid Industrial Packaging & Services | 2019 Divestiture |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of divestitures | business |  |  |  |  |  |  |  |  |  |  |  | 2 |  |
Number of subsidiaries liquidated | subsidiary |  |  |  |  |  |  |  |  |  |  |  | 2 |  |
Number of businesses, nonstrategic | business |  |  |  |  |  |  |  |  |  |  |  | 1 |  |
Loss on disposal |  |  |  |  |  |  |  |  |  |  |  | $ 3.7 |  |
Proceeds from divestiture and deconsolidation |  |  |  |  |  |  |  |  |  |  |  | 1.5 |  |
Rigid Industrial Packaging & Services | 2016 Divestiture |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from divestiture and deconsolidation |  |  |  |  |  |  |  |  |  |  |  | 1.6 |  |
Rigid Industrial Packaging & Services | 2015 Divestiture |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from divestiture and deconsolidation |  |  |  |  |  |  |  |  |  |  |  | 0.8 | 0.9 | 0.8
Notes receivable recorded from sale of business |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 4.3
Rigid Industrial Packaging & Services | 2017 Divestiture |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from divestiture and deconsolidation |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.5 |
Flexible Products & Services |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of subsidiaries liquidated | liquidation |  |  |  |  |  |  |  |  |  |  |  |  | 2 |
Number of businesses, nonstrategic | business |  |  |  |  |  |  |  |  |  |  |  |  |  | 1
Tholu B.V. |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill | 22.3 | $ 22.3 |  | 22.3 |  |  |  |  |  |  |  | 22.3 |  |
Total consideration | 52.2 | 52.2 |  |  |  |  |  |  |  |  |  |  |  |
Cash acquired | 2.1 | 2.1 |  |  |  |  |  |  |  |  |  |  |  |
Cash consideration | 25.1 | 25.1 |  |  |  |  |  |  |  |  |  |  |  |
Deferred payments | 29.2 | $ 29.2 |  |  |  |  |  |  |  |  |  |  |  |
Percentage acquired |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |
Caraustar |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to acquire business |  |  | $ 1,834.9 |  |  |  |  |  |  |  |  |  |  |
Acquisition-related cost |  |  | 62.1 |  |  |  |  |  |  |  |  |  |  |
Amount recognized in income statement |  |  |  |  |  |  |  |  |  |  |  | 34.0 |  |
Long-term debt |  |  | 20.8 |  |  |  |  |  |  |  |  |  |  |
Other long-term assets |  |  | 7.3 |  |  |  |  |  |  |  |  |  |  |
Goodwill | 726.6 |  | 752.5 | 726.6 |  |  |  |  |  |  |  | 726.6 |  |
Sales attributable to Grief |  |  |  |  |  |  |  |  |  |  |  | 936.3 |  |
Cash consideration |  |  | $ 1,834.9 |  |  |  |  |  |  |  |  | 1,834.9 |  |
Caraustar | Fair Value Adjustment to Inventory |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income |  |  |  |  |  |  |  |  |  |  |  | 9.0 |  |
Other Current Liabilities | Tholu B.V. |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred payments |  | $ 2.5 |  |  |  |  |  |  |  |  |  |  |  |
Other Noncurrent Liabilities | Tholu B.V. |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred payments |  | $ 26.7 |  |  |  |  |  |  |  |  |  |  |  |
Debt | Caraustar |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquisition-related cost | $ 28.1 |  |  | $ 28.1 |  |  |  |  |  |  |  | $ 28.1 |  |
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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