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Earnings Per Share - Computation of Earnings Per Share Basic and Diluted (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Apr. 30, 2015
Apr. 30, 2014
Apr. 30, 2015
Apr. 30, 2014
Numerator for basic and diluted EPS        
Net income attributable to Greif, Inc. $ 20.8us-gaap_NetIncomeLoss $ 38.4us-gaap_NetIncomeLoss $ 50.9us-gaap_NetIncomeLoss $ 69.1us-gaap_NetIncomeLoss
Cash dividends (24.7)us-gaap_DividendsCommonStockCash (24.7)us-gaap_DividendsCommonStockCash (49.2)us-gaap_DividendsCommonStockCash (49.1)us-gaap_DividendsCommonStockCash
Undistributed net income (loss) attributable to Greif, Inc. $ (3.9)gef_UndistributedNetIncomeAttributableToParent $ 13.7gef_UndistributedNetIncomeAttributableToParent $ 1.7gef_UndistributedNetIncomeAttributableToParent $ 20.0gef_UndistributedNetIncomeAttributableToParent