DIVESTITURES - Depreciation, Amortization, and Capital Expenditures from Discontinued Operations (Details) - Discontinued Operations, Held-for-Sale - Greif Containerboard Solutions, LLC - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Mar. 31, 2025	Mar. 31, 2025
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Depreciation and amortization	$ 9.3	$ 18.3
Capital expenditures	$ 5.5	$ 11.1