Goodwill and Other Intangible Assets - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2018
Goodwill [Line Items]
Goodwill acquired	$ 0.0	$ 748.9
Accumulated goodwill impairment loss	63.3	63.3	$ 63.3
Increase (decrease) in gross intangible assets	0.4
Intangible assets adjustments	0.9
Amortization expense	69.1	53.2	$ 15.2
Future amortization expense, 2020	67.2
Future amortization expense, 2021	59.1
Future amortization expense, 2022	56.6
Future amortization expense, 2023	53.3
Future amortization expense, 2024	50.8
Value of infinite lived intangible trademarks and trade names related to Blagden Express, Closed-loop, Box Board and Fustiplast	13.5
Impairment of intangible assets, finite-lived	9.9
Goodwill adjustments	18.5	0.0
Tholu B.V.
Goodwill [Line Items]
Increase intangible assets	5.3
Caraustar
Goodwill [Line Items]
Increase intangible assets	5.9
Paper Packaging & Services
Goodwill [Line Items]
Goodwill acquired	0.0
Goodwill adjustments	2.8
Rigid Industrial Packaging & Services
Goodwill [Line Items]
Goodwill acquired	0.0	22.3
Accumulated goodwill impairment loss	13.0
Goodwill adjustments	$ 1.1	$ 0.0