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ACQUISITIONS AND DIVESTITURES - Pro forma (Details) - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended
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Oct. 31, 2024 | Oct. 31, 2023
Ipackchem Acquisition |  |
Business Acquisition [Line Items] |  |
Pro forma net sales | $ 5,537.0 | $ 5,439.5
Pro forma net income attributable to Greif, Inc. | $ 289.0 | 354.6
Lee Container Acquisition |  |
Business Acquisition [Line Items] |  |
Pro forma net sales |  | 5,276.5
Pro forma net income attributable to Greif, Inc. |  | $ 361.0
Class A common stock | Ipackchem Acquisition |  |
Business Acquisition [Line Items] |  |
Basic earnings per share attributable to Greif, Inc. common shareholders: (in dollars per share) | $ 5.01 | $ 6.14
Diluted earnings per share attributable to Greif, Inc. common shareholders: (in dollars per share) | 4.98 | 6.07
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) |  | 6.25
Diluted earnings per share attributable to Greif, Inc. common shareholders: (in dollars per share) |  | 6.18
Class B common stock | Ipackchem Acquisition |  |
Business Acquisition [Line Items] |  |
Basic earnings per share attributable to Greif, Inc. common shareholders: (in dollars per share) | 7.50 | 9.20
Diluted earnings per share attributable to Greif, Inc. common shareholders: (in dollars per share) | $ 7.50 | 9.20
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) |  | 9.36
Diluted earnings per share attributable to Greif, Inc. common shareholders: (in dollars per share) |  | $ 9.36

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