EARNINGS PER SHARE - Computation of Earnings Per Share Basic and Diluted (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
Oct. 31, 2024	Oct. 31, 2023	Oct. 31, 2022
Numerator for basic and diluted EPS
Net income attributable to Greif, Inc.	$ 268.8	$ 359.2	$ 376.7
Cash dividends	(121.0)	(116.5)	(111.3)
Undistributed net income attributable to Greif, Inc.	$ 147.8	$ 242.7	$ 265.4
Class A common stock
Denominator for basic EPS –
Denominator for basic EPS (in shares)	25,751,386	25,592,928	26,251,536
Denominator for diluted EPS –
Denominator for diluted EPS (in shares)	25,977,401	25,999,231	26,610,712
EPS Basic
EPS Basic (usd per share)	$ 4.66	$ 6.22	$ 6.36
EPS Diluted
EPS Diluted (usd per share)	$ 4.64	$ 6.15	$ 6.30
Class B common stock
Denominator for basic EPS –
Denominator for basic EPS (in shares)	21,331,127	21,472,531	21,995,865
Denominator for diluted EPS –
Denominator for diluted EPS (in shares)	21,331,127	21,472,531	21,995,865
EPS Basic
EPS Basic (usd per share)	$ 6.98	$ 9.32	$ 9.53
EPS Diluted
EPS Diluted (usd per share)	$ 6.98	$ 9.32	$ 9.53

Undistributed net income attributable to Greif.

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