v3.3.1.900
Document and Entity Information - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Mar. 31, 2016
Mar. 31, 2015
May. 05, 2016
Sep. 30, 2015
Document Information [Line Items]            
Financing Receivable, Allowance for Credit Losses, Write-downs   $ 51.1   $ 51.1    
Financing Receivable, Allowance for Credit Losses, Period Increase (Decrease) $ (4.1) (17.4) $ 0.1 (17.2)    
Provision for Loan, Lease, and Other Losses 6.7 68.5 15.1 68.3    
Asset-backed loans 136.8   $ 136.8     $ 226.7
Document Type     10-Q      
Amendment Flag     false      
Document Period End Date     Mar. 31, 2016      
Asset Backed Loans And Other Invested Assets Gross 184.6   $ 184.6     274.6
Less: Allowance for credit losses $ 47.8   $ 47.8     $ 47.9
Industry Holdings, Number of Top Investments 10   10      
Equity Securities Holdings Exposure Amount of Single Issuer Greater than Stated Percentage of Total Investments 10.00%   10.00%      
Document Fiscal Year Focus     2016      
Document Fiscal Period Focus     Q2      
Trading Symbol     HRG      
Entity Registrant Name     HRG GROUP, INC.      
Entity Central Index Key     0000109177      
Current Fiscal Year End Date     --09-30      
Entity Filer Category     Large Accelerated Filer      
Entity Common Stock, Shares Outstanding         200,694,218  
Spectrum Brands [Member]            
Document Information [Line Items]            
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net $ (5.4) 9.3 $ (0.8) 17.1    
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net $ 0.7 $ 7.0 $ 0.9 $ 11.8