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Goodwill and Other Intangible Assets - Additional Information (Details) $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Oct. 31, 2019 USD ($) Segment | Oct. 31, 2018 USD ($) | Oct. 31, 2017 USD ($) Segment | Aug. 01, 2019 | Aug. 01, 2018
Goodwill [Line Items] |  |  |  |  |
Goodwill acquired | $ 748.9 | $ 0.0 |  |  |
Reporting unit, percentage of fair value in excess of carrying amount |  |  |  | 32.00% | 20.00%
Number of operating segments | Segment | 8 |  | 8 |  |
Number of reportable business segment | Segment | 4 |  | 4 |  |
Accumulated goodwill impairment loss | $ 63.3 | 63.3 | $ 63.3 |  |
Increase (decrease) in gross intangibles assets due to currency fluctuations | (2.6) |  |  |  |
Increase (decrease) in gross intangible assets | 747.3 |  |  |  |
Intangible assets adjustments | 0.3 |  |  |  |
Amortization expense | 53.2 | 15.2 | $ 13.5 |  |
Future amortization expense, 2020 | 69.3 |  |  |  |
Future amortization expense, 2021 | 67.1 |  |  |  |
Future amortization expense, 2022 | 59.1 |  |  |  |
Future amortization expense, 2023 | 56.3 |  |  |  |
Future amortization expense, 2024 | 52.9 |  |  |  |
Value of infinite lived intangible trademarks and trade names related to Blagden Express, Closed-loop, Box Board and Fustiplast | 13.1 |  |  |  |
Tholu B.V. |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Increase intangible assets | 24.1 |  |  |  |
Caraustar |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Increase intangible assets | 725.5 |  |  |  |
Paper Packaging & Services |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Goodwill acquired | 726.6 |  |  |  |
Rigid Industrial Packaging & Services |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Goodwill acquired | $ 22.3 | $ 0.0 |  |  |
Number of operating segments | Segment | 5 |  |  |  |
Accumulated goodwill impairment loss | $ 13.0 |  |  |  |

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