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Earnings Per Share - Computation of Earnings Per Share Basic and Diluted (Detail) - USD ($) $ in Millions | 3 Months Ended
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Jan. 31, 2017 | Jan. 31, 2016
Numerator for basic and diluted EPS |  |
Net income (loss) attributable to Greif, Inc. | $ 5.4 | $ (11.1)
Cash dividends | (24.5) | (24.5)
Undistributed net income (loss) attributable to Greif, Inc. | $ (19.1) | $ (35.6)

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