Segment Information (Net Sales By Geographic Area) (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 3,802.1	$ 3,808.7	$ 3,705.4
SBH And SB/RH [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	3,802.1	3,808.7	3,705.4
SBH And SB/RH [Member] | United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	2,649.5	2,627.2	2,543.2
SBH And SB/RH [Member] | Europe/MEA [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	656.6	669.4	653.2
SBH And SB/RH [Member] | Latin America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	205.4	212.1	207.5
SBH And SB/RH [Member] | North America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	168.5	173.9	174.4
SBH And SB/RH [Member] | Asia-Pacific [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 122.1	$ 126.1	$ 127.1