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Commitments and Contingencies - Additional Information (Detail) (USD $) | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Dec. 31, 2014 | Sep. 30, 2014 | Apr. 06, 2011
Commitment And Contingencies [Line Items] |  |  |
Reserves for legal, environmental and regulatory matters | 21,200,000 hrg_ReservesForLegalEnvironmentalAndRegulatoryMatters |  |
Notional amount of unfunded, legally binding lending commitments | 217,900,000 hrg_CommitmentsNotionalAmountOfUnfundedLegallyBindingLending |  |
Expiration of partial amount of unfunded, legally binding lending commitments | 64,800,000 hrg_CommitmentsPartiallyAmountOfNotionalAmountOfUnfundedLegallyBindingLending |  |
Maximum [Member] |  |  |
Commitment And Contingencies [Line Items] |  |  |
Expiry date of partial amount of notional amount | 1 year |  |
Expiry date of remainder part of notional amount | 5 years |  |
Minimum [Member] |  |  |
Commitment And Contingencies [Line Items] |  |  |
Expiry date of remainder part of notional amount | 1 year |  |
FGLH [Member] |  |  |
Commitment And Contingencies [Line Items] |  |  |
Business Acquisition Fair Value Of Contingent Purchase Price Consideration Reduction |  |  | 50,000,000 hrg_BusinessAcquisitionFairValueOfContingentPurchasePriceConsiderationReduction / us-gaap_BusinessAcquisitionAxis = hrg_FidelityAndGuarantyLifeHoldingsMember
Accrued amount of guaranty fund assessments | 3,800,000 us-gaap_LossContingencyUndiscountedAmountOfInsuranceRelatedAssessmentLiability / us-gaap_BusinessAcquisitionAxis = hrg_FidelityAndGuarantyLifeHoldingsMember |  |
Estimated future premium tax deductions | 4,000,000 us-gaap_LossContingencyAccrualInsuranceRelatedAssessmentPremiumTaxOffset / us-gaap_BusinessAcquisitionAxis = hrg_FidelityAndGuarantyLifeHoldingsMember |  |
Spectrum Brands [Member] |  |  |
Commitment And Contingencies [Line Items] |  |  |
Environmental costs recognized, capitalized | 4,600,000 us-gaap_EnvironmentalCostsRecognizedCapitalized / us-gaap_BusinessAcquisitionAxis = hrg_SpectrumBrandsMember |  |
OMGUK CARVM financing fee [Member] |  |  |
Commitment And Contingencies [Line Items] |  |  |
Reserves for legal, environmental and regulatory matters | 6,100,000 hrg_ReservesForLegalEnvironmentalAndRegulatoryMatters / us-gaap_LitigationCaseAxis = hrg_OMGUKCARVMfinancingfeeMember |  |
Cressy Plaintiff [Member] |  |  |
Commitment And Contingencies [Line Items] |  |  |
Loss Contingency, Receivable | 4,400,000 us-gaap_LossContingencyReceivable / us-gaap_LitigationCaseAxis = hrg_CressyPlaintiffMember |  |
Litigation Settlement, Amount |  | 5,300,000 us-gaap_LitigationSettlementAmount / us-gaap_LitigationCaseAxis = hrg_CressyPlaintiffMember |
Loss Contingency Accrual, Provision | 9,000,000 us-gaap_LossContingencyAccrualProvision / us-gaap_LitigationCaseAxis = hrg_CressyPlaintiffMember |  |
Estimated Litigation Liability | 3,400,000 us-gaap_LitigationReserve / us-gaap_LitigationCaseAxis = hrg_CressyPlaintiffMember |  |
Unasserted Claim [Member] | FGLH [Member] |  |  |
Commitment And Contingencies [Line Items] |  |  |
Administrative costs and potential liabilities | 2,500,000 hrg_ContingentLiabilitiesEstablishedRelatedToAdministrativeCostsAndPotentialLiabilitiesDueToAuditsAndExaminations / us-gaap_BusinessAcquisitionAxis = hrg_FidelityAndGuarantyLifeHoldingsMember / us-gaap_LossContingenciesByNatureOfContingencyAxis = us-gaap_UnassertedClaimMember |  |
Loss Contingency Accrual, Payments | 1.1 us-gaap_LossContingencyAccrualCarryingValuePayments / us-gaap_BusinessAcquisitionAxis = hrg_FidelityAndGuarantyLifeHoldingsMember / us-gaap_LossContingenciesByNatureOfContingencyAxis = us-gaap_UnassertedClaimMember |  |

X
- Definition Business acquisition fair value of contingent purchase price consideration reduction. + References No definition available. + Details
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Balance Type: | credit
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- Details
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- Definition Notional amount of unfunded, legally binding lending commitments. + References No definition available. + Details
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Namespace Prefix: | hrg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Partially amount of notional amount of unfunded, legally binding lending commitments. + References No definition available. + Details
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- Definition Contingent Liabilities Established Related To Administrative Costs And Potential Liabilities Due To Audits And Examinations + References No definition available. + Details
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Period Type: | instant

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- Definition Expiry Dated Of Partial Amount Of Notional Amount + References No definition available. + Details
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- Definition Expiry date of remainder part of notional amount. + References No definition available. + Details
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- Definition Reserves for legal, environmental and regulatory matters. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Amount of costs recognized in the balance sheet for known or estimated future costs arising from requirements to perform activities to remediate one or more sites. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 25 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=39739230&loc=d3e11660-110855 + Details
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Balance Type: | debit
Period Type: | instant

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- Definition Aggregate carrying amount of the estimated litigation liability for known or estimated probable loss from litigation, which may include attorneys' fees and other litigation costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.25) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of judgment or settlement awarded to (against) the entity in respect of litigation. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- Definition Amount of payments made reducing loss contingency liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349 + Details
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- Definition The amount of insurance-related assessment liability that is expected to be recovered through a premium tax offset based on current laws applied to in-force policies. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 405 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6392405&loc=d3e24119-109301 + Details
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- Definition Amount charged against operating income increasing loss contingency liability, after adjustments to reduce previously estimated charges. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349 + Details
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- Definition Amount of receivable related to a loss contingency accrual. For example, an insurance recovery receivable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12053-110248 + Details
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- Definition The liability as of the balance sheet date representing required funding mandated by statute or regulatory authority that is related directly or indirectly to underwriting activities, including pools for self-insurance and excluding premium taxes and income taxes. The funds derived from the assessments generally enable a government guarantor to pay insurance claims in the event that the underwriting insurer is insolvent or otherwise unable to meet its payment obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 405 -SubTopic 30 -Section 15 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=9154593&loc=d3e23169-109297 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 405 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6392405&loc=d3e24119-109301 + Details
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- Details
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- Details
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- Details
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Balance Type: |
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- Details
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- Details
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