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Receivables, net - Additional Information (Details) - Credit Concentration Risk [Member] | 12 Months Ended
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Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Percentage of net sales from major customer | 15.20% | 14.70% | 15.70%
Sales Outside Domestic Country as Percentage of Net Sales | 36.10% | 37.70% | 40.20%

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- Definition Percentage Of Net Sales Due To Customers + References No definition available. + Details
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Balance Type: | na
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- Definition Sales Outside Domestic Country as Percentage of Net Sales + References No definition available. + Details
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Namespace Prefix: | hrg_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration

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