ACQUISITIONS AND DIVESTITURES - Additional Information (Details) $ in Millions		3 Months Ended		6 Months Ended
	Feb. 11, 2019 USD ($)	Apr. 30, 2019 USD ($)	Apr. 30, 2018 USD ($)	Apr. 30, 2019 USD ($)	Apr. 30, 2018 USD ($) Divestiture	Oct. 31, 2018 USD ($)
Business Acquisition [Line Items]
Acquisition-related costs		$ 13.8	$ 0.0	$ 16.4	$ 0.2
Interest expense, net		33.9	13.0	45.6	26.3
Net income		21.1	51.9	56.9	112.0
Proceeds from divestitures					0.5
Notes receivable recorded from sale of business			$ 2.9		$ 2.9
Number Of divestitures (in divestitures) | Divestiture					0
Long-term debt		2,851.8		2,851.8		$ 884.1
Other long-term assets		93.9		93.9		$ 100.4
Caraustar
Business Acquisition [Line Items]
Payments to acquire business	$ 1,834.9
Acquisition-related cost	62.0
Amount recognized in income statement				35.2
Acquisition-related costs				12.0
Debt extinguishment charges				21.9
Interest expense, net				1.3
Goodwill	752.5
Sales attributable to Grief		293.3		293.3
Net income attributable to Grief		7.7		7.7
Long-term debt	17.9
Other long-term assets	8.9
Rigid Industrial Packaging & Services
Business Acquisition [Line Items]
Loss on disposal				1.7
Proceeds from divestitures				0.8	$ 0.9
Notes receivable recorded from sale of business		2.4		2.4
Fair Value Adjustment to Inventory | Caraustar
Business Acquisition [Line Items]
Properties, plants and equipment	$ 35.2
Net income					$ 9.0
Debt | Caraustar
Business Acquisition [Line Items]
Acquisition-related cost		$ 26.8		$ 26.8