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Earnings Per Share - Computation Earnings Per Share Basic and Diluted (Detail) (USD $)
In Millions, except Share data, unless otherwise specified
3 Months Ended 12 Months Ended
Oct. 31, 2013
Jul. 31, 2013
Apr. 30, 2013
Jan. 31, 2013
Oct. 31, 2012
Jul. 31, 2012
Apr. 30, 2012
Jan. 31, 2012
Oct. 31, 2013
Oct. 31, 2012
Oct. 31, 2011
Numerator for basic and diluted EPS-                      
Net income attributable to Greif $ 36.8 $ 46.7 $ 40.2 $ 23.6 $ 25.8 $ 37.5 $ 38.4 $ 20.7 $ 147.3 $ 122.4 $ 174.7
Cash dividends                 98.3 97.7 97.8
Undistributed net income attributable to Greif, Inc.                 $ 49.0 $ 24.7 $ 76.9
Class A Common Stock [Member]
                     
Denominator for basic EPS-                      
Denominator for basic EPS 25,454,762 25,435,379 25,390,486 25,316,395 25,270,259 25,177,924 25,149,691 25,052,868 25,399,256 25,162,686 24,869,573
Denominator for diluted EPS-                      
Denominator for diluted EPS 25,473,100 25,464,862 25,433,480 25,382,077 25,351,713 25,271,088 25,288,352 25,193,827 25,422,537 25,234,540 25,047,332
EPS Basic                      
EPS Basic $ 0.63 $ 0.80 $ 0.69 $ 0.41 $ 0.44 $ 0.64 $ 0.66 $ 0.36 $ 2.52 $ 2.10 $ 3.00
EPS Diluted                      
EPS Diluted $ 0.63 $ 0.80 $ 0.69 $ 0.41 $ 0.44 $ 0.64 $ 0.66 $ 0.36 $ 2.52 $ 2.10 $ 2.99
Class B Common Stock [Member]
                     
Denominator for basic EPS-                      
Denominator for basic EPS 22,119,966 22,119,966 22,119,966 22,119,966 22,119,966 22,119,966 22,120,666 22,120,966 22,100,000 22,100,000 22,300,000
Denominator for diluted EPS-                      
Denominator for diluted EPS 22,119,966 22,119,966 22,119,966 22,119,966 22,119,966 22,119,966 22,120,666 22,120,966 22,100,000 22,100,000 22,300,000
EPS Basic                      
EPS Basic $ 0.94 $ 1.20 $ 1.03 $ 0.60 $ 0.66 $ 0.96 $ 0.99 $ 0.53 $ 3.77 $ 3.14 $ 4.48
EPS Diluted                      
EPS Diluted $ 0.94 $ 1.20 $ 1.03 $ 0.60 $ 0.66 $ 0.96 $ 0.99 $ 0.53 $ 3.77 $ 3.14 $ 4.48