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ACQUISITIONS AND DIVESTITURES - Pro forma (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Apr. 30, 2024 | Apr. 30, 2023 | Apr. 30, 2024 | Apr. 30, 2023
Lee Container Acquisition |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Pro forma net sales |  | $ 1,326.2 |  | $ 2,637.8
Pro forma net income attributable to Greif, Inc. |  | 113.1 |  | 216.3
Ipackchem Acquisition |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Pro forma net sales | $ 1,404.3 | 1,366.9 | $ 2,665.7 | 2,693.4
Pro forma net income attributable to Greif, Inc. | $ 54.6 | $ 114.9 | $ 130.2 | $ 190.2
Class A Common Stock | Lee Container Acquisition |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Basic earnings per share attributable to Greif, Inc. common shareholders: (in dollars per share) |  | $ 1.95 |  | $ 3.73
Diluted earnings per share attributable to Greif, Inc. common shareholders: (in dollars per share) |  | 1.93 |  | 3.70
Class A Common Stock | Ipackchem Acquisition |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Basic earnings per share attributable to Greif, Inc. common shareholders: (in dollars per share) | $ 0.94 | 3.28 | $ 2.26 | 3.28
Diluted earnings per share attributable to Greif, Inc. common shareholders: (in dollars per share) | 0.94 | 3.25 | 2.26 | 3.25
Class B Common Stock | Lee Container Acquisition |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Basic earnings per share attributable to Greif, Inc. common shareholders: (in dollars per share) |  | 2.92 |  | 5.58
Diluted earnings per share attributable to Greif, Inc. common shareholders: (in dollars per share) |  | 2.92 |  | 5.58
Class B Common Stock | Ipackchem Acquisition |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Basic earnings per share attributable to Greif, Inc. common shareholders: (in dollars per share) | 1.42 | 4.90 | 3.38 | 4.90
Diluted earnings per share attributable to Greif, Inc. common shareholders: (in dollars per share) | $ 1.42 | $ 4.90 | $ 3.38 | $ 4.90

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