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Basis of Presentation, Significant Accounting Polices and Practicies and Recent Accounting Pronouncements (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended
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Dec. 31, 2014
Reserve Quantities [Line Items] |
Document Period End Date | Dec. 31, 2014
Unamortized costs exceed ceiling limitations | $ 190.0 us-gaap_UnamortizedCostsCapitalizedLessRelatedDeferredIncomeTaxesExceedCeilingLimitationExpense
Spectrum Brands [Member] |
Reserve Quantities [Line Items] |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners | 41.40%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners / dei_LegalEntityAxis = hrg_SpectrumBrandsMember
FGL [Member] |
Reserve Quantities [Line Items] |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners | 19.90%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners / dei_LegalEntityAxis = hrg_FglMember
Natural Gas [Member] |
Reserve Quantities [Line Items] |
Average Sales Prices | 4.35 us-gaap_AverageSalesPrices / us-gaap_AverageSalesPriceAndProductionCostsPerUnitOfProductionProductionTypeAxis = us-gaap_NaturalGasReservesMember
Oil [Member] |
Reserve Quantities [Line Items] |
Average Sales Prices | 94.99 us-gaap_AverageSalesPrices / us-gaap_AverageSalesPriceAndProductionCostsPerUnitOfProductionProductionTypeAxis = us-gaap_OilReservesMember
Natural Gas Liquids [Member] |
Reserve Quantities [Line Items] |
Average Sales Prices | 42.55 us-gaap_AverageSalesPrices / us-gaap_AverageSalesPriceAndProductionCostsPerUnitOfProductionProductionTypeAxis = us-gaap_NaturalGasLiquidsReservesMember

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- Definition The end date of the period reflected on the cover page if a periodic report. For all other reports and registration statements containing historical data, it is the date up through which that historical data is presented. If there is no historical data in the report, use the filing date. The format of the date is CCYY-MM-DD. + References No definition available. + Details
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- Definition The revenues derived from sales of oil or gas in each geographic area during the reporting period divided by the number of barrels of oil produced or thousands of cubic feet of gas produced. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Industry Guide -Number 2 -Paragraph 3 -Subparagraph A + Details
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- Definition The excess of unamortized costs capitalized within a cost center, less related deferred income taxes, over the cost center ceiling limitation, which is charged to expense for oil and gas producing companies that use full cost method of accounting for investments in oil and gas producing properties. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 360 -Section S99 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=27015634&loc=d3e516453-122869 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 10 -Paragraph c -Subparagraph 4(ii) -Article 4 + Details
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