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Stock Compensation - Additional Information (Detail) (USD $)
In Millions, except Share data in Thousands, unless otherwise specified
3 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Sep. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Document Fiscal Year Focus 2015    
Stock-based compensation $ 20.1us-gaap_ShareBasedCompensation 23.4us-gaap_ShareBasedCompensation  
Document Period End Date Dec. 31, 2014    
Executive Bonus Plan [Member] | Minimum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 1 year    
Executive Bonus Plan [Member] | Maximum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 3 years    
HGI [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 3 years 3 years  
Compensation cost not yet recognized 35.0us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
   
Unrecognized compensation cost expected to recognized, years 1 year 10 months 2 days    
Granted $ 29,600,000.00us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
46,300,000.00us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
 
Exercised / Released $ 25,700,000.00us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
14,400,000.00us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
 
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value 2.2us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
0.9us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
 
Employee Service Share-based Compensation, Cash Received from Exercise of Stock Options 1.9us-gaap_EmployeeServiceShareBasedCompensationCashReceivedFromExerciseOfStockOptions
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
0.6us-gaap_EmployeeServiceShareBasedCompensationCashReceivedFromExerciseOfStockOptions
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
 
HGI [Member] | Stock option awards [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Weighted average remaining contractual term of outstanding stock option awards 8 years 3 months 11 days    
HGI [Member] | Restricted stock awards [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Equity intruments other than options granted 1,885us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
3,302us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
 
Granted $ 13.36us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
   
Exercised / Released $ 8.84us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
   
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number 4,876us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
  5,438us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
HGI [Member] | Restricted stock units [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Options, granted 6us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
   
Granted $ 13.36us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
   
Exercised / Released $ 0.00us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
   
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number 13us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
  7us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
HGI [Member] | Warrant [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Options, granted 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_AwardTypeAxis
= us-gaap_WarrantMember
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
   
Stock options vested and exercisable at December 31, 2014 600hrg_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExercisableNumber
/ us-gaap_AwardTypeAxis
= us-gaap_WarrantMember
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
   
HGI [Member] | Employee Stock Option [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Assumed dividend yield 0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
 
Options, granted 822us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
1,326us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
 
Stock options vested and exercisable at December 31, 2014 2,419hrg_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExercisableNumber
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
   
Spectrum Brands [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Time-based and vest over period of restricted stock units   1 year  
Spectrum Brands [Member] | Minimum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Time-based and vest over period of restricted stock units 1 year    
Spectrum Brands [Member] | Maximum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Time-based and vest over period of restricted stock units 3 years    
Spectrum Brands [Member] | Restricted stock units [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Equity intruments other than options granted 233us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ dei_LegalEntityAxis
= hrg_SpectrumBrandsMember
414us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ dei_LegalEntityAxis
= hrg_SpectrumBrandsMember
 
Stock Issued During Period, Value, Restricted Stock Award, Gross 21.1us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ dei_LegalEntityAxis
= hrg_SpectrumBrandsMember
29.0us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardGross
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ dei_LegalEntityAxis
= hrg_SpectrumBrandsMember
 
Compensation cost not yet recognized 17.1us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ dei_LegalEntityAxis
= hrg_SpectrumBrandsMember
   
Granted $ 90.40us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ dei_LegalEntityAxis
= hrg_SpectrumBrandsMember
   
Exercised / Released $ 69.12us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ dei_LegalEntityAxis
= hrg_SpectrumBrandsMember
   
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number 471us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ dei_LegalEntityAxis
= hrg_SpectrumBrandsMember
  827us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ dei_LegalEntityAxis
= hrg_SpectrumBrandsMember
Spectrum Brands [Member] | Immediate Vest Restricted Stock Units [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock Issued During Period, Shares, Restricted Stock Award, Gross 111us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross
/ us-gaap_AwardTypeAxis
= hrg_ImmediateVestRestrictedStockUnitsMember
/ dei_LegalEntityAxis
= hrg_SpectrumBrandsMember
81us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross
/ us-gaap_AwardTypeAxis
= hrg_ImmediateVestRestrictedStockUnitsMember
/ dei_LegalEntityAxis
= hrg_SpectrumBrandsMember
 
Spectrum Brands [Member] | Time Based Restricted Stock Units [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock Issued During Period, Shares, Restricted Stock Award, Gross 118us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross
/ us-gaap_AwardTypeAxis
= hrg_TimeBasedRestrictedStockUnitsMember
/ dei_LegalEntityAxis
= hrg_SpectrumBrandsMember
45us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross
/ us-gaap_AwardTypeAxis
= hrg_TimeBasedRestrictedStockUnitsMember
/ dei_LegalEntityAxis
= hrg_SpectrumBrandsMember
 
Spectrum Brands [Member] | Performance-based and Time-based Shares [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock Issued During Period, Shares, Restricted Stock Award, Gross 4us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross
/ us-gaap_AwardTypeAxis
= hrg_PerformancebasedandTimebasedSharesMember
/ dei_LegalEntityAxis
= hrg_SpectrumBrandsMember
288us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross
/ us-gaap_AwardTypeAxis
= hrg_PerformancebasedandTimebasedSharesMember
/ dei_LegalEntityAxis
= hrg_SpectrumBrandsMember
 
Time-based and vest over period of restricted stock units   2 years  
FGL [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term 4 years 6 months 4 years 6 months  
Vesting period 3 years 3 years  
Granted $ 7,800,000.00us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ dei_LegalEntityAxis
= hrg_FglMember
10,400,000.00us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ dei_LegalEntityAxis
= hrg_FglMember
 
FGL [Member] | Performance Restricted Stock Unit (PRSUs) [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Equity intruments other than options granted 40us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= hrg_PerformanceRestrictedStockUnitPRSUsMember
/ dei_LegalEntityAxis
= hrg_FglMember
469us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= hrg_PerformanceRestrictedStockUnitPRSUsMember
/ dei_LegalEntityAxis
= hrg_FglMember
 
Granted $ 20.36us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= hrg_PerformanceRestrictedStockUnitPRSUsMember
/ dei_LegalEntityAxis
= hrg_FglMember
   
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number 618us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= hrg_PerformanceRestrictedStockUnitPRSUsMember
/ dei_LegalEntityAxis
= hrg_FglMember
  578us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= hrg_PerformanceRestrictedStockUnitPRSUsMember
/ dei_LegalEntityAxis
= hrg_FglMember
FGL [Member] | Restricted stock awards [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Equity intruments other than options granted 250us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
/ dei_LegalEntityAxis
= hrg_FglMember
107us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
/ dei_LegalEntityAxis
= hrg_FglMember
 
Granted $ 24.34us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
/ dei_LegalEntityAxis
= hrg_FglMember
   
Exercised / Released $ 18.03us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
/ dei_LegalEntityAxis
= hrg_FglMember
   
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number 365us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
/ dei_LegalEntityAxis
= hrg_FglMember
  172us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
/ dei_LegalEntityAxis
= hrg_FglMember
FGL [Member] | Common Stock [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Granted   1,000,000.00us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_CommonStockMember
/ dei_LegalEntityAxis
= hrg_FglMember
 
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number   58us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= us-gaap_CommonStockMember
/ dei_LegalEntityAxis
= hrg_FglMember
 
FGL [Member] | Employee Stock Option [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Options, granted 176us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ dei_LegalEntityAxis
= hrg_FglMember
191us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ dei_LegalEntityAxis
= hrg_FglMember
 
Stock options vested and exercisable at December 31, 2014 78hrg_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExercisableNumber
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ dei_LegalEntityAxis
= hrg_FglMember
   
FGLH [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Assumed dividend yield   2.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
/ dei_LegalEntityAxis
= hrg_FidelityAndGuarantyLifeHoldingsMember
 
Compensation cost not yet recognized $ 20.2us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
/ dei_LegalEntityAxis
= hrg_FidelityAndGuarantyLifeHoldingsMember
   
Unrecognized compensation cost expected to recognized, years 1 year 10 months 24 days    
FGLH [Member] | Minimum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Assumed dividend yield 1.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
/ dei_LegalEntityAxis
= hrg_FidelityAndGuarantyLifeHoldingsMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
   
FGLH [Member] | Maximum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Assumed dividend yield 2.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
/ dei_LegalEntityAxis
= hrg_FidelityAndGuarantyLifeHoldingsMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
   
FGLH [Member] | Restricted stock units [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Granted $ 0.00us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ dei_LegalEntityAxis
= hrg_FidelityAndGuarantyLifeHoldingsMember
   
Exercised / Released $ 49.45us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ dei_LegalEntityAxis
= hrg_FidelityAndGuarantyLifeHoldingsMember
   
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number 14us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ dei_LegalEntityAxis
= hrg_FidelityAndGuarantyLifeHoldingsMember
  26us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ dei_LegalEntityAxis
= hrg_FidelityAndGuarantyLifeHoldingsMember
FGLH [Member] | Employee Stock Option [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Options, granted 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ dei_LegalEntityAxis
= hrg_FidelityAndGuarantyLifeHoldingsMember
   
Stock options vested and exercisable at December 31, 2014 166hrg_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExercisableNumber
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ dei_LegalEntityAxis
= hrg_FidelityAndGuarantyLifeHoldingsMember
   
Restricted stock awards [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 3,265us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_RestrictedStockMember
2,433us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_RestrictedStockMember
 
Stock option awards [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 1,500us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_StockOptionMember
1,200us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_StockOptionMember