Segment Information (Net Sales By Geographic Area) (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 3,145.9	$ 3,009.5	$ 3,029.4
SBH and SB/RH [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	3,145.9	3,009.5	3,029.4
SBH and SB/RH [Member] | United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	2,561.1	2,417.8	2,410.2
SBH and SB/RH [Member] | Europe/MEA [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	251.0	270.7	300.0
SBH and SB/RH [Member] | Latin America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	92.8	90.3	109.9
SBH and SB/RH [Member] | North America - Other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	154.6	144.7	129.8
SBH and SB/RH [Member] | Asia-Pacific [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 86.4	$ 86.0	$ 79.5