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Consolidating Financial Information Additional Information (Details) $ in Millions | Jun. 30, 2017 USD ($)
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Asset Management segment [Member] |
Condensed Financial Statements, Captions [Line Items] |
Fair Value, Net Asset (Liability) | $ 84.4

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_CondensedFinancialStatementsCaptionsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Fair value of asset after deduction of liability. + References No definition available. + Details
Name: | us-gaap_FairValueNetAssetLiability
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
Name: | dei_LegalEntityAxis=hrg_AssetManagementsegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |