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Quarterly Financial Data (Unaudited) - Quarterly Results of Operations (Detail) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Oct. 31, 2018 | Jul. 31, 2018 | Apr. 30, 2018 | Jan. 31, 2018 | Oct. 31, 2017 | Jul. 31, 2017 | Apr. 30, 2017 | Jan. 31, 2017 | Oct. 31, 2018 | Oct. 31, 2017 | Oct. 31, 2016
Quarterly Results Of Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total net sales | $ 987.7 | $ 1,012.1 | $ 968.3 | $ 905.7 | $ 968.1 | $ 961.8 | $ 887.4 | $ 820.9 | $ 3,873.8 | $ 3,638.2 | $ 3,323.6
Gross profit | 204.8 | 217.1 | 195.3 | 171.7 | 182.4 | 187.1 | 181.9 | 163.3 | 788.9 | 714.7 | 684.9
Net income | 45.5 | 72.0 | 51.9 | 60.1 | 39.7 | 47.5 | 39.9 | 8.0 | 229.5 | 135.1 | 75.5
Net income attributable to Greif, Inc. | 40.1 | $ 67.7 | $ 45.1 | $ 56.5 | 33.3 | $ 43.9 | $ 36.0 | $ 5.4 | 209.4 | 118.6 | 74.9
Diluted: |  |  |  |  |  |  |  |  |  |  |
Restructuring charges | 4.8 |  |  |  | 4.0 |  |  |  | 18.6 | 12.7 | 26.9
Non-cash asset impairment charges | 4.2 |  |  |  | 14.9 |  |  |  | 8.3 | 20.8 | 51.4
Pension settlement charge | 0.9 |  |  |  | 1.5 |  |  |  |  | 25.9 |
Gain on disposals of properties, plants and equipment, net | 1.9 |  |  |  | 3.5 |  |  |  | $ (5.6) | $ (0.4) | $ (10.3)
Gain (Loss) on sale of business | $ 0.9 |  |  |  | $ (3.9) |  |  |  |  |  |
Class A Common Stock |  |  |  |  |  |  |  |  |  |  |
Basic earnings per share attributable to Greif, Inc.: |  |  |  |  |  |  |  |  |  |  |
EPS Basic (usd per share) | $ 0.68 | $ 1.15 | $ 0.77 | $ 0.96 | $ 0.57 | $ 0.74 | $ 0.61 | $ 0.10 | $ 3.56 | $ 2.02 | $ 1.28
Diluted earnings per share attributed to Greif, Inc.: |  |  |  |  |  |  |  |  |  |  |
EPS Diluted (usd per share) | $ 0.67 | $ 1.15 | $ 0.77 | $ 0.96 | $ 0.57 | $ 0.74 | $ 0.61 | $ 0.10 | $ 3.55 | $ 2.02 | $ 1.28
Basic: |  |  |  |  |  |  |  |  |  |  |
Basic (shares) | 25,941,279 | 25,941,279 | 25,934,680 | 25,845,758 | 25,835,281 | 25,834,636 | 25,824,194 | 25,787,769 | 25,915,887 | 25,820,470 | 25,755,545
Diluted: |  |  |  |  |  |  |  |  |  |  |
Diluted (shares) | 26,139,524 | 25,941,279 | 25,934,680 | 25,845,758 | 25,835,281 | 25,835,294 | 25,828,882 | 25,792,441 | 25,965,856 | 25,822,940 | 25,756,893
Market price of common stock (usd per share) | $ 47.30 | $ 54.03 | $ 57.63 | $ 57.76 | $ 55.53 | $ 55.68 | $ 57.75 | $ 56.28 |  |  |
Class B Common Stock |  |  |  |  |  |  |  |  |  |  |
Basic earnings per share attributable to Greif, Inc.: |  |  |  |  |  |  |  |  |  |  |
EPS Basic (usd per share) | 1.03 | 1.72 | 1.14 | 1.44 | 0.85 | 1.12 | 0.92 | 0.13 | $ 5.33 | $ 3.02 | $ 1.90
Diluted earnings per share attributed to Greif, Inc.: |  |  |  |  |  |  |  |  |  |  |
EPS Diluted (usd per share) | $ 1.03 | $ 1.72 | $ 1.14 | $ 1.44 | $ 0.85 | $ 1.12 | $ 0.92 | $ 0.13 | $ 5.33 | $ 3.02 | $ 1.90
Basic: |  |  |  |  |  |  |  |  |  |  |
Basic (shares) | 22,007,725 | 22,007,725 | 22,007,725 | 22,007,725 | 22,007,725 | 22,009,596 | 22,009,725 | 22,009,725 | 22,000,000 | 22,000,000 | 22,100,000
Diluted: |  |  |  |  |  |  |  |  |  |  |
Diluted (shares) | 22,007,725 | 22,007,725 | 22,007,725 | 22,007,725 | 22,007,725 | 22,009,596 | 22,009,725 | 22,009,725 | 22,000,000 | 22,000,000 | 22,100,000
Market price of common stock (usd per share) | $ 51.36 | $ 57.20 | $ 61.56 | $ 61.6 | $ 62.85 | $ 59.26 | $ 65.92 | $ 68.94 |  |  |
Maximum | Class A Common Stock |  |  |  |  |  |  |  |  |  |  |
Diluted: |  |  |  |  |  |  |  |  |  |  |
Market price of common stock (usd per share) | 58.82 | 60.89 | 59.09 | 62.94 | 60.01 | 60.32 | 58.95 | 57.72 |  |  |
Maximum | Class B Common Stock |  |  |  |  |  |  |  |  |  |  |
Diluted: |  |  |  |  |  |  |  |  |  |  |
Market price of common stock (usd per share) | 63.5 | 64.02 | 63.52 | 68.71 | 65.25 | 66.6 | 71.31 | 70.2 |  |  |
Minimum | Class A Common Stock |  |  |  |  |  |  |  |  |  |  |
Diluted: |  |  |  |  |  |  |  |  |  |  |
Market price of common stock (usd per share) | 44.72 | 51.71 | 48.80 | 49.68 | 55 | 53.55 | 51.70 | 44.22 |  |  |
Minimum | Class B Common Stock |  |  |  |  |  |  |  |  |  |  |
Diluted: |  |  |  |  |  |  |  |  |  |  |
Market price of common stock (usd per share) | $ 48.35 | $ 56.01 | $ 52.07 | $ 55.90 | $ 57.58 | $ 54.81 | $ 56.93 | $ 55.05 |  |  |

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