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ACQUISITIONS AND DIVESTITURES - Pro forma (Details) - Lee Container Acquisition - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended
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Oct. 31, 2023 | Oct. 31, 2022
Pro forma net sales | $ 5,276.5 | $ 6,607.6
Pro forma net income attributable to Greif, Inc. | $ 361.0 | $ 380.5
Class A common stock |  |
Basic earnings per share attributable to Greif, Inc. common shareholders: (in dollars per share) | $ 6.25 | $ 6.42
Diluted earnings per share attributable to Greif, Inc. common shareholders: (in dollars per share) | 6.18 | 6.36
Class B common stock |  |
Basic earnings per share attributable to Greif, Inc. common shareholders: (in dollars per share) | 9.36 | 9.62
Diluted earnings per share attributable to Greif, Inc. common shareholders: (in dollars per share) | $ 9.36 | $ 9.62

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