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Earnings Per Share - Additional Information (Detail) (USD $)
In Millions, except Share data, unless otherwise specified
 6 Months Ended 18 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended
Apr. 30, 2013
Apr. 30, 2013
Apr. 30, 2013
Class A Common Stock [Member]
Apr. 30, 2012
Class A Common Stock [Member]
Apr. 30, 2012
Class B Common Stock [Member]
Apr. 30, 2013
Class B Common Stock [Member]
Apr. 30, 2012
Class B Common Stock [Member]
Class of Stock [Line Items]              
Calculation of EPS     (i) multiply 40% times the average Class A shares outstanding, then divide that amount by the product of 40% of the average Class A shares outstanding plus 60% of the average Class B shares outstanding to get a percentage, (ii) divide undistributed net income attributable to Greif, Inc. by the average Class A shares outstanding, then (iii) multiply item (i) by item (ii), and finally (iv) add item (iii) to the Class A cash dividend per share. Diluted shares are factored into the Class A calculation.     (i) multiply 60 percent times the average Class B shares outstanding, then divide that amount by the product of 40 percent of the average Class A shares outstanding plus 60 percent of the average Class B shares outstanding to get a percentage, (ii) undistributed net income divided by the average Class B shares outstanding, (iii) multiply item (i) by item (ii), (iv) add item (iii) to the Class B cash dividend. Class B diluted EPS is identical to Class B basic EPS.  
Percentage Of Shares Outstanding Used In Two Class Method Calculation     40.00%     60.00%  
Number of shares authorized to be purchased 4,000,000 4,000,000          
Repurchase of common stock 3,184,272   1,425,452 0 1,000 1,758,820 1,000
Total cost of the shares repurchased   $ 0.1