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Investments - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2014 Investment industry | Dec. 31, 2013 | Sep. 30, 2014
Schedule of Available-for-sale Securities [Line Items] |  |  |
Document Period End Date | Dec. 31, 2014 |  |
Asset-backed loans | $ 791.9 hrg_AssetBackedLoansAndOtherInvestedAssets |  | $ 811.6 hrg_AssetBackedLoansAndOtherInvestedAssets
Significant investment, number of industries | 1 hrg_SignificantInvestmentNumberOfIndustries |  |
Industry holdings, number of top investments | 10 hrg_IndustryHoldingsNumberOfTopInvestments |  |
Equity Securities Holdings Exposure Amount of Single Issuer Greater than Stated Percentage of Total Investments | 39.30%hrg_EquitySecuritiesHoldingsExposureAmountofSingleIssuerGreaterthanStatedPercentageofTotalInvestments |  |
Total investments, Carrying Value | 19,740.3 hrg_AvailableForSaleSecuritiesCarryingValue |  | 19,252.5 hrg_AvailableForSaleSecuritiesCarryingValue
Loans Receivable, Gross, Commercial, Mortgage | 206.8 us-gaap_LoansReceivableCommercialMortgage |  | 136.2 us-gaap_LoansReceivableCommercialMortgage
Commercial Mortgage Receivable, Percentage of Total | 100.00%hrg_CommercialMortgageReceivablePercentageofTotal |  | 100.00%hrg_CommercialMortgageReceivablePercentageofTotal
Financing Receivable, Recorded Investment, 1 to 29 Days Past Due | 206.8 us-gaap_FinancingReceivableRecordedInvestment1To29DaysPastDue |  | 136.2 us-gaap_FinancingReceivableRecordedInvestment1To29DaysPastDue
Non Agency Residential Mortgage Backed Securities [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Unrealized gains included in AOCI related to the non-credit portion of other than-temporary impairments on non-agency residential-mortgage-backed securities | 0.9 hrg_UnrealizedGainRelatedToNonCreditPortionOfOtherThanTemporaryImpairmentsIncludedInAccumulatedOtherComprehensiveIncome / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = hrg_NonAgencyResidentialMortgageBackedSecuritiesMember |  |
Unrealized losses included in AOCI related to the non-credit portion of other than-temporary impairments on non-agency residential-mortgage-backed securities | (1.9)hrg_UnrealizedLossesRelatedToNonCreditPortionOfOtherThanTemporaryImpairmentsIncludedInAccumulatedOtherComprehensiveIncome / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = hrg_NonAgencyResidentialMortgageBackedSecuritiesMember |  |
Other Marketable Securities, Current | 15,555.0 us-gaap_OtherMarketableSecuritiesCurrent / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = hrg_NonAgencyResidentialMortgageBackedSecuritiesMember |  | 15,009.3 us-gaap_OtherMarketableSecuritiesCurrent / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = hrg_NonAgencyResidentialMortgageBackedSecuritiesMember
FGLH [Member] | Stockholders' Equity, Total [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Fair value of investment | 1,011.0 us-gaap_InvestmentsFairValueDisclosure / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_StockholdersEquityTotalMember / dei_LegalEntityAxis = hrg_FidelityAndGuarantyLifeHoldingsMember |  | 768.5 us-gaap_InvestmentsFairValueDisclosure / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_StockholdersEquityTotalMember / dei_LegalEntityAxis = hrg_FidelityAndGuarantyLifeHoldingsMember
Percentage of fair value of the invested assets portfolio | 5.10%hrg_PercentageOfInvestmentsFairValueInRelationToInvestedAssetsPortfolio / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_StockholdersEquityTotalMember / dei_LegalEntityAxis = hrg_FidelityAndGuarantyLifeHoldingsMember |  | 4.00%hrg_PercentageOfInvestmentsFairValueInRelationToInvestedAssetsPortfolio / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_StockholdersEquityTotalMember / dei_LegalEntityAxis = hrg_FidelityAndGuarantyLifeHoldingsMember
Investment in issuers | 6 hrg_NumberOfInvestmentIssuers / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_StockholdersEquityTotalMember / dei_LegalEntityAxis = hrg_FidelityAndGuarantyLifeHoldingsMember |  | 4 hrg_NumberOfInvestmentIssuers / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_StockholdersEquityTotalMember / dei_LegalEntityAxis = hrg_FidelityAndGuarantyLifeHoldingsMember
Percentage of stockholders equity | 10.00%hrg_EquityInvestmentOwnershipPercentage / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_StockholdersEquityTotalMember / dei_LegalEntityAxis = hrg_FidelityAndGuarantyLifeHoldingsMember |  |
Investment Income [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Available-for-sale Securities, Gross Realized Losses | (14.3)us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses / us-gaap_IncomeStatementLocationAxis = us-gaap_InvestmentIncomeMember | (12.0)us-gaap_AvailableForSaleSecuritiesGrossRealizedLosses / us-gaap_IncomeStatementLocationAxis = us-gaap_InvestmentIncomeMember |
Available for sale securities on fixed maturity | 809.6 hrg_AvailableForSaleSecuritiesOnFixedMaturityUnderCommitmentAgreement / us-gaap_IncomeStatementLocationAxis = us-gaap_InvestmentIncomeMember | 1,705.9 hrg_AvailableForSaleSecuritiesOnFixedMaturityUnderCommitmentAgreement / us-gaap_IncomeStatementLocationAxis = us-gaap_InvestmentIncomeMember |
Available-for-sale Securities, Gross Realized Gains | 10.5 us-gaap_AvailableForSaleSecuritiesGrossRealizedGains / us-gaap_IncomeStatementLocationAxis = us-gaap_InvestmentIncomeMember | 21.8 us-gaap_AvailableForSaleSecuritiesGrossRealizedGains / us-gaap_IncomeStatementLocationAxis = us-gaap_InvestmentIncomeMember |
Concentration [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Investment Securities Held by Subsidiaries Subject to Specialized Industry Accounting Principles at Fair Value | 2,217.7 hrg_InvestmentSecuritiesHeldbySubsidiariesSubjecttoSpecializedIndustryAccountingPrinciplesatFairValue / us-gaap_FairValueConcentrationOfRiskDisclosureItemsAxis = us-gaap_FairValueConcentrationOfRiskAllFinancialInstrumentsMember |  | 2,240.3 hrg_InvestmentSecuritiesHeldbySubsidiariesSubjecttoSpecializedIndustryAccountingPrinciplesatFairValue / us-gaap_FairValueConcentrationOfRiskDisclosureItemsAxis = us-gaap_FairValueConcentrationOfRiskAllFinancialInstrumentsMember
Percentage of fair value of the invested assets portfolio | 11.20%hrg_PercentageOfInvestmentsFairValueInRelationToInvestedAssetsPortfolio / us-gaap_FairValueConcentrationOfRiskDisclosureItemsAxis = us-gaap_FairValueConcentrationOfRiskAllFinancialInstrumentsMember |  | 11.60%hrg_PercentageOfInvestmentsFairValueInRelationToInvestedAssetsPortfolio / us-gaap_FairValueConcentrationOfRiskDisclosureItemsAxis = us-gaap_FairValueConcentrationOfRiskAllFinancialInstrumentsMember
Number Of Issuers In Investment | 80 hrg_NumberOfIssuersInInvestment / us-gaap_FairValueConcentrationOfRiskDisclosureItemsAxis = us-gaap_FairValueConcentrationOfRiskAllFinancialInstrumentsMember |  |
Concentration [Member] | FGLH [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Fair value of investment | 250.0 us-gaap_InvestmentsFairValueDisclosure / us-gaap_FairValueConcentrationOfRiskDisclosureItemsAxis = us-gaap_FairValueConcentrationOfRiskAllFinancialInstrumentsMember / dei_LegalEntityAxis = hrg_FidelityAndGuarantyLifeHoldingsMember |  |
Percentage of fair value of the invested assets portfolio | 1.30%hrg_PercentageOfInvestmentsFairValueInRelationToInvestedAssetsPortfolio / us-gaap_FairValueConcentrationOfRiskDisclosureItemsAxis = us-gaap_FairValueConcentrationOfRiskAllFinancialInstrumentsMember / dei_LegalEntityAxis = hrg_FidelityAndGuarantyLifeHoldingsMember |  |
Asset based loan receivables [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Asset-backed loans | 150.0 hrg_AssetBackedLoansAndOtherInvestedAssets / us-gaap_FairValueConcentrationOfRiskDisclosureItemsAxis = hrg_AssetbasedloanreceivablesMember |  |
Insurance Segment [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Fair value on securities | 40.0 hrg_AvailableForSaleDepressedSecuritiesFairValueDisclosure / us-gaap_StatementBusinessSegmentsAxis = hrg_InsuranceSegmentMember |  | 0.2 hrg_AvailableForSaleDepressedSecuritiesFairValueDisclosure / us-gaap_StatementBusinessSegmentsAxis = hrg_InsuranceSegmentMember
Percentage of amortized cost |  |  | 20.00%hrg_PercentageOfAvailableForSaleDepressedSecuritiesAboveAmortizedCost / us-gaap_StatementBusinessSegmentsAxis = hrg_InsuranceSegmentMember
Percentage of carrying values of all investments (less than 1%) |  |  | 1.00%hrg_PercentageOfAvailableForSaleDepressedSecuritiesInRelationToCarryingValuesOfAllInvestments / us-gaap_StatementBusinessSegmentsAxis = hrg_InsuranceSegmentMember
FHLB of Atlanta Funding Agreement Collateral Held [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Investment Owned, at Fair Value | 566.1 us-gaap_SecuritiesReceivedAsCollateral / us-gaap_InvestmentTypeAxis = hrg_FHLBofAtlantaFundingAgreementCollateralHeldMember |  | 573.2 us-gaap_SecuritiesReceivedAsCollateral / us-gaap_InvestmentTypeAxis = hrg_FHLBofAtlantaFundingAgreementCollateralHeldMember
Fixed Maturities Available For Sale [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Total investments, Carrying Value | 17,677.8 hrg_AvailableForSaleSecuritiesCarryingValue / us-gaap_InformationByCategoryOfDebtSecurityAxis = hrg_FixedMaturitiesAvailableForSaleMember |  | 17,211.5 hrg_AvailableForSaleSecuritiesCarryingValue / us-gaap_InformationByCategoryOfDebtSecurityAxis = hrg_FixedMaturitiesAvailableForSaleMember
Fixed Maturities Available For Sale [Member] | Asset-backed Securities [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Total investments, Carrying Value | 1,839.1 hrg_AvailableForSaleSecuritiesCarryingValue / us-gaap_InformationByCategoryOfDebtSecurityAxis = hrg_FixedMaturitiesAvailableForSaleMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_AssetBackedSecuritiesMember |  | 1,792.9 hrg_AvailableForSaleSecuritiesCarryingValue / us-gaap_InformationByCategoryOfDebtSecurityAxis = hrg_FixedMaturitiesAvailableForSaleMember / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_AssetBackedSecuritiesMember
Commercial Mortgage Loan [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Loans and Leases Receivable, Ratio of Performing Loans to All Loans | 100.00%hrg_LoansandLeasesReceivableRatioofPerformingLoanstoAllLoans / us-gaap_GainLossOnInvestmentsByCategoryAxis = hrg_CommercialMortgageLoanMember |  |
Loan to Value, Maximum Threshold | 75.00%hrg_LoantoValueMaximumThreshold / us-gaap_GainLossOnInvestmentsByCategoryAxis = hrg_CommercialMortgageLoanMember |  |
Investments, Cost or Amortized, Percentage of Total | 1.00%hrg_InvestmentsCostorAmortizedPercentageofTotal / us-gaap_GainLossOnInvestmentsByCategoryAxis = hrg_CommercialMortgageLoanMember |  | 0.70%hrg_InvestmentsCostorAmortizedPercentageofTotal / us-gaap_GainLossOnInvestmentsByCategoryAxis = hrg_CommercialMortgageLoanMember
Asset based loan receivables [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Investments, Cost or Amortized, Percentage of Total | 31.60%hrg_InvestmentsCostorAmortizedPercentageofTotal / us-gaap_GainLossOnInvestmentsByCategoryAxis = hrg_AssetbasedloanreceivablesMember |  |
Industrial Property [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Loans Receivable, Gross, Commercial, Mortgage | 20.0 us-gaap_LoansReceivableCommercialMortgage / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_IndustrialPropertyMember |  | 0 us-gaap_LoansReceivableCommercialMortgage / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_IndustrialPropertyMember
Commercial Mortgage Receivable, Percentage of Total | 9.70%hrg_CommercialMortgageReceivablePercentageofTotal / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_IndustrialPropertyMember |  | 0.00%hrg_CommercialMortgageReceivablePercentageofTotal / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_IndustrialPropertyMember
Warehouse [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Loans Receivable, Gross, Commercial, Mortgage | 47.7 us-gaap_LoansReceivableCommercialMortgage / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_WarehouseMember |  | 48.0 us-gaap_LoansReceivableCommercialMortgage / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_WarehouseMember
Commercial Mortgage Receivable, Percentage of Total | 23.10%hrg_CommercialMortgageReceivablePercentageofTotal / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_WarehouseMember |  | 35.20%hrg_CommercialMortgageReceivablePercentageofTotal / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_WarehouseMember
Apartment Building [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Loans Receivable, Gross, Commercial, Mortgage | 29.9 us-gaap_LoansReceivableCommercialMortgage / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_ApartmentBuildingMember |  | 37.8 us-gaap_LoansReceivableCommercialMortgage / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_ApartmentBuildingMember
Commercial Mortgage Receivable, Percentage of Total | 14.50%hrg_CommercialMortgageReceivablePercentageofTotal / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_ApartmentBuildingMember |  | 27.80%hrg_CommercialMortgageReceivablePercentageofTotal / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_ApartmentBuildingMember
Office Building [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Loans Receivable, Gross, Commercial, Mortgage | 76.0 us-gaap_LoansReceivableCommercialMortgage / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_OfficeBuildingMember |  | 44.6 us-gaap_LoansReceivableCommercialMortgage / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_OfficeBuildingMember
Commercial Mortgage Receivable, Percentage of Total | 36.70%hrg_CommercialMortgageReceivablePercentageofTotal / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_OfficeBuildingMember |  | 32.70%hrg_CommercialMortgageReceivablePercentageofTotal / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_OfficeBuildingMember
Retail Site [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Loans Receivable, Gross, Commercial, Mortgage | 33.2 us-gaap_LoansReceivableCommercialMortgage / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_RetailSiteMember |  | 5.8 us-gaap_LoansReceivableCommercialMortgage / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_RetailSiteMember
Commercial Mortgage Receivable, Percentage of Total | 16.00%hrg_CommercialMortgageReceivablePercentageofTotal / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_RetailSiteMember |  | 4.30%hrg_CommercialMortgageReceivablePercentageofTotal / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_RetailSiteMember
East North Central US [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Loans Receivable, Gross, Commercial, Mortgage | 64.3 us-gaap_LoansReceivableCommercialMortgage / us-gaap_StatementGeographicalAxis = hrg_EastNorthCentralUSMember |  | 27.8 us-gaap_LoansReceivableCommercialMortgage / us-gaap_StatementGeographicalAxis = hrg_EastNorthCentralUSMember
Commercial Mortgage Receivable, Percentage of Total | 31.10%hrg_CommercialMortgageReceivablePercentageofTotal / us-gaap_StatementGeographicalAxis = hrg_EastNorthCentralUSMember |  | 20.40%hrg_CommercialMortgageReceivablePercentageofTotal / us-gaap_StatementGeographicalAxis = hrg_EastNorthCentralUSMember
Middle Atlantic US [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Loans Receivable, Gross, Commercial, Mortgage | 18.0 us-gaap_LoansReceivableCommercialMortgage / us-gaap_StatementGeographicalAxis = hrg_MiddleAtlanticUSMember |  | 10.9 us-gaap_LoansReceivableCommercialMortgage / us-gaap_StatementGeographicalAxis = hrg_MiddleAtlanticUSMember
Commercial Mortgage Receivable, Percentage of Total | 8.70%hrg_CommercialMortgageReceivablePercentageofTotal / us-gaap_StatementGeographicalAxis = hrg_MiddleAtlanticUSMember |  | 8.00%hrg_CommercialMortgageReceivablePercentageofTotal / us-gaap_StatementGeographicalAxis = hrg_MiddleAtlanticUSMember
Pacific US [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Loans Receivable, Gross, Commercial, Mortgage | 61.2 us-gaap_LoansReceivableCommercialMortgage / us-gaap_StatementGeographicalAxis = hrg_PacificUSMember |  | 61.5 us-gaap_LoansReceivableCommercialMortgage / us-gaap_StatementGeographicalAxis = hrg_PacificUSMember
Commercial Mortgage Receivable, Percentage of Total | 29.60%hrg_CommercialMortgageReceivablePercentageofTotal / us-gaap_StatementGeographicalAxis = hrg_PacificUSMember |  | 45.10%hrg_CommercialMortgageReceivablePercentageofTotal / us-gaap_StatementGeographicalAxis = hrg_PacificUSMember
South Atlantic US [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Loans Receivable, Gross, Commercial, Mortgage | 37.5 us-gaap_LoansReceivableCommercialMortgage / us-gaap_StatementGeographicalAxis = hrg_SouthAtlanticUSMember |  | 0 us-gaap_LoansReceivableCommercialMortgage / us-gaap_StatementGeographicalAxis = hrg_SouthAtlanticUSMember
Commercial Mortgage Receivable, Percentage of Total | 18.10%hrg_CommercialMortgageReceivablePercentageofTotal / us-gaap_StatementGeographicalAxis = hrg_SouthAtlanticUSMember |  | 0.00%hrg_CommercialMortgageReceivablePercentageofTotal / us-gaap_StatementGeographicalAxis = hrg_SouthAtlanticUSMember
West North Central US [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Loans Receivable, Gross, Commercial, Mortgage | 5.8 us-gaap_LoansReceivableCommercialMortgage / us-gaap_StatementGeographicalAxis = hrg_WestNorthCentralUSMember |  | 5.8 us-gaap_LoansReceivableCommercialMortgage / us-gaap_StatementGeographicalAxis = hrg_WestNorthCentralUSMember
Commercial Mortgage Receivable, Percentage of Total | 2.80%hrg_CommercialMortgageReceivablePercentageofTotal / us-gaap_StatementGeographicalAxis = hrg_WestNorthCentralUSMember |  | 4.30%hrg_CommercialMortgageReceivablePercentageofTotal / us-gaap_StatementGeographicalAxis = hrg_WestNorthCentralUSMember
West South Central US [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Loans Receivable, Gross, Commercial, Mortgage | 20.0 us-gaap_LoansReceivableCommercialMortgage / us-gaap_StatementGeographicalAxis = hrg_WestSouthCentralUSMember |  | 30.2 us-gaap_LoansReceivableCommercialMortgage / us-gaap_StatementGeographicalAxis = hrg_WestSouthCentralUSMember
Commercial Mortgage Receivable, Percentage of Total | 9.70%hrg_CommercialMortgageReceivablePercentageofTotal / us-gaap_StatementGeographicalAxis = hrg_WestSouthCentralUSMember |  | 22.20%hrg_CommercialMortgageReceivablePercentageofTotal / us-gaap_StatementGeographicalAxis = hrg_WestSouthCentralUSMember
Greater Than One Point Two Five [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Loans Receivable, Gross, Commercial, Mortgage | 186.0 us-gaap_LoansReceivableCommercialMortgage / hrg_DebtServiceCoverageAxis = hrg_GreaterThanOnePointTwoFiveMember |  | 135.4 us-gaap_LoansReceivableCommercialMortgage / hrg_DebtServiceCoverageAxis = hrg_GreaterThanOnePointTwoFiveMember
Greater Than One But Less Than One Point Two Five [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Loans Receivable, Gross, Commercial, Mortgage | 20.0 us-gaap_LoansReceivableCommercialMortgage / hrg_DebtServiceCoverageAxis = hrg_GreaterThanOneButLessThanOnePointTwoFiveMember |  | 0 us-gaap_LoansReceivableCommercialMortgage / hrg_DebtServiceCoverageAxis = hrg_GreaterThanOneButLessThanOnePointTwoFiveMember
Ratio Not Available [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Loans Receivable, Gross, Commercial, Mortgage | 0.8 us-gaap_LoansReceivableCommercialMortgage / hrg_DebtServiceCoverageAxis = hrg_RatioNotAvailableMember |  | 0.8 us-gaap_LoansReceivableCommercialMortgage / hrg_DebtServiceCoverageAxis = hrg_RatioNotAvailableMember
LTV Less Than 50 Percent [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Loans Receivable, Gross, Commercial, Mortgage | 45.1 us-gaap_LoansReceivableCommercialMortgage / hrg_LoantoValueAxis = hrg_LTVLessThan50PercentMember |  | 45.4 us-gaap_LoansReceivableCommercialMortgage / hrg_LoantoValueAxis = hrg_LTVLessThan50PercentMember
Commercial Mortgage Receivable, Percentage of Total | 21.80%hrg_CommercialMortgageReceivablePercentageofTotal / hrg_LoantoValueAxis = hrg_LTVLessThan50PercentMember |  | 33.30%hrg_CommercialMortgageReceivablePercentageofTotal / hrg_LoantoValueAxis = hrg_LTVLessThan50PercentMember
LTV Less Than 50 Percent [Member] | Greater Than One Point Two Five [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Loans Receivable, Gross, Commercial, Mortgage | 44.3 us-gaap_LoansReceivableCommercialMortgage / hrg_DebtServiceCoverageAxis = hrg_GreaterThanOnePointTwoFiveMember / hrg_LoantoValueAxis = hrg_LTVLessThan50PercentMember |  | 44.6 us-gaap_LoansReceivableCommercialMortgage / hrg_DebtServiceCoverageAxis = hrg_GreaterThanOnePointTwoFiveMember / hrg_LoantoValueAxis = hrg_LTVLessThan50PercentMember
LTV Less Than 50 Percent [Member] | Greater Than One But Less Than One Point Two Five [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Loans Receivable, Gross, Commercial, Mortgage | 0 us-gaap_LoansReceivableCommercialMortgage / hrg_DebtServiceCoverageAxis = hrg_GreaterThanOneButLessThanOnePointTwoFiveMember / hrg_LoantoValueAxis = hrg_LTVLessThan50PercentMember |  | 0 us-gaap_LoansReceivableCommercialMortgage / hrg_DebtServiceCoverageAxis = hrg_GreaterThanOneButLessThanOnePointTwoFiveMember / hrg_LoantoValueAxis = hrg_LTVLessThan50PercentMember
LTV Less Than 50 Percent [Member] | Ratio Not Available [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Loans Receivable, Gross, Commercial, Mortgage | 0.8 us-gaap_LoansReceivableCommercialMortgage / hrg_DebtServiceCoverageAxis = hrg_RatioNotAvailableMember / hrg_LoantoValueAxis = hrg_LTVLessThan50PercentMember |  | 0.8 us-gaap_LoansReceivableCommercialMortgage / hrg_DebtServiceCoverageAxis = hrg_RatioNotAvailableMember / hrg_LoantoValueAxis = hrg_LTVLessThan50PercentMember
LTV 50 to 60 Percent [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Loans Receivable, Gross, Commercial, Mortgage | 51.4 us-gaap_LoansReceivableCommercialMortgage / hrg_LoantoValueAxis = hrg_LTV50to60PercentMember |  | 19.9 us-gaap_LoansReceivableCommercialMortgage / hrg_LoantoValueAxis = hrg_LTV50to60PercentMember
Commercial Mortgage Receivable, Percentage of Total | 24.90%hrg_CommercialMortgageReceivablePercentageofTotal / hrg_LoantoValueAxis = hrg_LTV50to60PercentMember |  | 14.60%hrg_CommercialMortgageReceivablePercentageofTotal / hrg_LoantoValueAxis = hrg_LTV50to60PercentMember
LTV 50 to 60 Percent [Member] | Greater Than One Point Two Five [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Loans Receivable, Gross, Commercial, Mortgage | 51.4 us-gaap_LoansReceivableCommercialMortgage / hrg_DebtServiceCoverageAxis = hrg_GreaterThanOnePointTwoFiveMember / hrg_LoantoValueAxis = hrg_LTV50to60PercentMember |  | 19.9 us-gaap_LoansReceivableCommercialMortgage / hrg_DebtServiceCoverageAxis = hrg_GreaterThanOnePointTwoFiveMember / hrg_LoantoValueAxis = hrg_LTV50to60PercentMember
LTV 50 to 60 Percent [Member] | Greater Than One But Less Than One Point Two Five [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Loans Receivable, Gross, Commercial, Mortgage | 0 us-gaap_LoansReceivableCommercialMortgage / hrg_DebtServiceCoverageAxis = hrg_GreaterThanOneButLessThanOnePointTwoFiveMember / hrg_LoantoValueAxis = hrg_LTV50to60PercentMember |  | 0 us-gaap_LoansReceivableCommercialMortgage / hrg_DebtServiceCoverageAxis = hrg_GreaterThanOneButLessThanOnePointTwoFiveMember / hrg_LoantoValueAxis = hrg_LTV50to60PercentMember
LTV 50 to 60 Percent [Member] | Ratio Not Available [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Loans Receivable, Gross, Commercial, Mortgage | 0 us-gaap_LoansReceivableCommercialMortgage / hrg_DebtServiceCoverageAxis = hrg_RatioNotAvailableMember / hrg_LoantoValueAxis = hrg_LTV50to60PercentMember |  | 0 us-gaap_LoansReceivableCommercialMortgage / hrg_DebtServiceCoverageAxis = hrg_RatioNotAvailableMember / hrg_LoantoValueAxis = hrg_LTV50to60PercentMember
LTV 60 to 75 Percent [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Loans Receivable, Gross, Commercial, Mortgage | 110.3 us-gaap_LoansReceivableCommercialMortgage / hrg_LoantoValueAxis = hrg_LTV60to75PercentMember |  | 70.9 us-gaap_LoansReceivableCommercialMortgage / hrg_LoantoValueAxis = hrg_LTV60to75PercentMember
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Non-Qualifying Participation [Member] |  |  |
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