Basis Of Presentation And Significant Accounting Policies (Summary Of Transactions Related Charges) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Business Acquisition [Line Items]
Total transaction-related charges	$ 4.8	$ 5.5	$ 16.4	$ 20.4
HHI Integration [Member]
Business Acquisition [Line Items]
Total transaction-related charges		0.9	0.9	5.5
PetMatrix Integration [Member]
Business Acquisition [Line Items]
Total transaction-related charges		0.8		4.5
HPC Divestiture [Member]
Business Acquisition [Line Items]
Total transaction-related charges	0.6	2.4	6.1	7.8
GBL Post Divestiture Separation [Member]
Business Acquisition [Line Items]
Total transaction-related charges	3.3		5.8
GAC Post Divestiture Separation [Member]
Business Acquisition [Line Items]
Total transaction-related charges			0.4
Other Integration [Member]
Business Acquisition [Line Items]
Total transaction-related charges	$ 0.9	$ 1.4	$ 3.2	$ 2.6