Acquisition and Related Charges (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Business Merger [Line Items]
Business Combination Acquisition And Integration Related Costs	$ 4.5	$ 3.3	$ 9.7	$ 6.6
HRG SPB Merger [Member]
Business Merger [Line Items]
Business Combination Acquisition And Integration Related Costs	4.5		4.8	0.9
Spectrum Brands [Member] | HRG SPB Merger [Member]
Business Merger [Line Items]
Business Combination Acquisition And Integration Related Costs	$ 11.6		$ 14.1	$ 2.6