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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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