Earnings Per Share - SBH (Schedule Of Weighted Average Shares) (Details) - shares shares in Millions	3 Months Ended	6 Months Ended
Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Basic
Basic, weighted average shares	51.8	32.5	52.6	32.4
Diluted
Diluted, weighted average shares	51.8	32.5	52.6	32.7
HRG [Member]
Basic
Basic, weighted average shares		201.6		201.1
Basic, share conversion at 1 to 0.1613		32.5		32.4
Diluted
Diluted, weighted average shares		201.6		201.1
Diluted, share conversion at 1 to 0.1613		32.5		32.4

Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=109260490&loc=d3e1448-109256

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

Name:	us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration