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Earnings Per Share - SBH (Narrative) (Details) shares in Millions, $ in Millions			12 Months Ended
	Jul. 13, 2018 USD ($) shares	Jul. 12, 2018 USD ($)	Sep. 30, 2017
Upward adjustment	$ 200.0
Increase in total outstanding shares | shares	20.6
HRG [Member]
Net indebtedness and transaction expenses		$ 328.2
Upward adjustment		$ 200.0
Reverse stock split conversion			0.1613
HRG [Member] | HRG Common Stock [Member]
Reverse stock split conversion		0.1613

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- Definition

Ratio applied to the conversion of stock split, for example but not limited to, one share converted to two or two shares converted to one.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 4
-Subparagraph (SAB TOPIC 4.C)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187143-122770

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