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Restructuring Charges - Reconciliation of Total Amounts Expected to be Incurred from Open Restructuring Plans Anticipated to be Realized (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Oct. 31, 2020 | Oct. 31, 2019 | Oct. 31, 2020 | Oct. 31, 2019 | Oct. 31, 2018
Restructuring and Related Cost [Abstract] |  |  |  |  |
Total Amounts Expected to be Incurred | $ 61.5 |  | $ 61.5 |  |
Restructuring charges | 11.9 | $ 5.8 | 38.7 | $ 26.1 | $ 18.6
Amounts remaining to be incurred | 22.8 |  | 22.8 |  |
Employee Separation Costs |  |  |  |  |
Restructuring and Related Cost [Abstract] |  |  |  |  |
Restructuring charges |  |  | 26.4 | 22.5 | 14.8
Other restructuring costs |  |  |  |  |
Restructuring and Related Cost [Abstract] |  |  |  |  |
Restructuring charges |  |  | 12.3 | $ 3.6 | $ 3.8
Rigid Industrial Packaging & Services |  |  |  |  |
Restructuring and Related Cost [Abstract] |  |  |  |  |
Total Amounts Expected to be Incurred | 42.5 |  | 42.5 |  |
Restructuring charges |  |  | 26.3 |  |
Amounts remaining to be incurred | 16.2 |  | 16.2 |  |
Rigid Industrial Packaging & Services | Employee Separation Costs |  |  |  |  |
Restructuring and Related Cost [Abstract] |  |  |  |  |
Total Amounts Expected to be Incurred | 31.6 |  | 31.6 |  |
Restructuring charges |  |  | 21.0 |  |
Amounts remaining to be incurred | 10.6 |  | 10.6 |  |
Rigid Industrial Packaging & Services | Other restructuring costs |  |  |  |  |
Restructuring and Related Cost [Abstract] |  |  |  |  |
Total Amounts Expected to be Incurred | 10.9 |  | 10.9 |  |
Restructuring charges |  |  | 5.3 |  |
Amounts remaining to be incurred | 5.6 |  | 5.6 |  |
Flexible Products & Services |  |  |  |  |
Restructuring and Related Cost [Abstract] |  |  |  |  |
Total Amounts Expected to be Incurred | 4.3 |  | 4.3 |  |
Restructuring charges |  |  | 2.8 |  |
Amounts remaining to be incurred | 1.5 |  | 1.5 |  |
Flexible Products & Services | Employee Separation Costs |  |  |  |  |
Restructuring and Related Cost [Abstract] |  |  |  |  |
Total Amounts Expected to be Incurred | 1.9 |  | 1.9 |  |
Restructuring charges |  |  | 0.9 |  |
Amounts remaining to be incurred | 1.0 |  | 1.0 |  |
Flexible Products & Services | Other restructuring costs |  |  |  |  |
Restructuring and Related Cost [Abstract] |  |  |  |  |
Total Amounts Expected to be Incurred | 2.4 |  | 2.4 |  |
Restructuring charges |  |  | 1.9 |  |
Amounts remaining to be incurred | 0.5 |  | 0.5 |  |
Paper Packaging & Services |  |  |  |  |
Restructuring and Related Cost [Abstract] |  |  |  |  |
Total Amounts Expected to be Incurred | 14.7 |  | 14.7 |  |
Restructuring charges |  |  | 9.6 |  |
Amounts remaining to be incurred | 5.1 |  | 5.1 |  |
Paper Packaging & Services | Employee Separation Costs |  |  |  |  |
Restructuring and Related Cost [Abstract] |  |  |  |  |
Total Amounts Expected to be Incurred | 4.5 |  | 4.5 |  |
Restructuring charges |  |  | 4.5 |  |
Amounts remaining to be incurred | 0.0 |  | 0.0 |  |
Paper Packaging & Services | Other restructuring costs |  |  |  |  |
Restructuring and Related Cost [Abstract] |  |  |  |  |
Total Amounts Expected to be Incurred | 10.2 |  | 10.2 |  |
Restructuring charges |  |  | 5.1 |  |
Amounts remaining to be incurred | $ 5.1 |  | $ 5.1 |  |

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