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Related Party Transactions - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 3 Months Ended
--- | ---
Dec. 30, 2012 | Jan. 01, 2012
Related Party Transaction [Line Items] |  |
Services Agreement advance written notice period for termination | 30 days |
Expenses related to Services Agreement | $ 0.3 |
Reimbursement of Harbinger Capital expenses |  | 0.7
Repurchase of registered secondary offering which is owned by the Principal Stockholders | 20.0 |
Registration Rights Agreement [Member] |  |
Related Party Transaction [Line Items] |  |
Repurchase of registered secondary offering which is owned by the Principal Stockholders |  | 23.0
Offering cost incurred by company |  | $ 0.4

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- Definition Common Stock Offering Issuance Costs + References No definition available. + Details
Name: | hrg_CommonStockOfferingIssuanceCosts
Namespace Prefix: | hrg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Related Party Transaction Agreement Prior Written Notice Period For Termination Of Agreement + References No definition available. + Details
Name: | hrg_RelatedPartyTransactionAgreementPriorWrittenNoticePeriodForTerminationOfAgreement
Namespace Prefix: | hrg_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Related Party Transaction Expenses + References No definition available. + Details
Name: | hrg_RelatedPartyTransactionExpenses
Namespace Prefix: | hrg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Secondary Offering Of Common Stock + References No definition available. + Details
Name: | hrg_SecondaryOfferingOfCommonStock
Namespace Prefix: | hrg_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_RelatedPartyTransactionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of selling, general and administrative expenses resulting from transactions, excluding transactions that are eliminated in consolidated or combined financial statements, with related party. + References No definition available. + Details
Name: | us-gaap_RelatedPartyTransactionSellingGeneralAndAdministrativeExpensesFromTransactionsWithRelatedParty
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration