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Quarterly Financial Data (Unaudited) - Additional Information (Detail) - Subsequent Event [Member] | Dec. 16, 2015 Shareholder
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Class A Common Stock [Member] |
Number of stockholders | 406
Class B Common Stock [Member] |
Number of stockholders | 95

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- Definition Number of stockholders. + References No definition available. + Details
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Namespace Prefix: | gef_
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Balance Type: | na
Period Type: | duration

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- Details
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |