Document and Entity Information $ in Millions	3 Months Ended			6 Months Ended
	Mar. 31, 2017 USD ($)		Mar. 31, 2016 USD ($)	Mar. 31, 2017 USD ($)		Mar. 31, 2016 USD ($)	May 02, 2017 shares
Document Information [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net	$ (2.4)	[1]		$ (29.5)	[2]
Document Type				10-Q
Amendment Flag				false
Document Period End Date				Mar. 31, 2017
Industry Holdings, Number of Top Investments	10			10
Document Fiscal Year Focus				2017
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 | shares							200,543,374
Spectrum Brands [Member]
Document Information [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net	$ (10.4)		$ (5.4)	$ 32.8		$ (0.8)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	$ 3.8		$ 0.7	$ 8.6		$ 0.9

[1] (a) During the three months ended March 31, 2017, the net transfer out of Level 3 was exclusively to Level 2.

[2] (a) During the six months ended March 31, 2017, the net transfer out of Level 3 was exclusively to Level 2.