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ACQUISITIONS AND DIVESTITURES - Pro Forma Results (Details) - Ipackchem Acquisition - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Apr. 30, 2024 | Apr. 30, 2024
Business Combination [Line Items] |  |
Pro forma net sales | $ 1,404.3 | $ 2,665.7
Pro forma net income attributable to Greif, Inc. | $ 54.6 | $ 130.2
Class A Common Stock |  |
Business Combination [Line Items] |  |
Basic earnings per share attributable to Greif, Inc. common shareholders: (in dollars per share) | $ 0.94 | $ 2.26
Diluted earnings per share attributable to Greif, Inc. common shareholders: (in dollars per share) | 0.94 | 2.26
Class B Common Stock |  |
Business Combination [Line Items] |  |
Basic earnings per share attributable to Greif, Inc. common shareholders: (in dollars per share) | 1.42 | 3.38
Diluted earnings per share attributable to Greif, Inc. common shareholders: (in dollars per share) | $ 1.42 | $ 3.38

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