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Significant Accounting Policies And Practices (Summary Of Transactions Related Charges) (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
Business Acquisition [Line Items]
Total transaction-related charges	$ 21.8	$ 30.2	$ 17.7
HHI Integration [Member]
Business Acquisition [Line Items]
Total transaction-related charges	0.9	6.0	5.9
PetMatrix Integration [Member]
Business Acquisition [Line Items]
Total transaction-related charges		4.9	4.5
HPC Divestiture [Member]
Business Acquisition [Line Items]
Total transaction-related charges	7.3	14.9
GBL Post Divestiture Separation [Member]
Business Acquisition [Line Items]
Total transaction-related charges	9.5
GAC Post Divestiture Separation [Member]
Business Acquisition [Line Items]
Total transaction-related charges	0.3
Other Integration [Member]
Business Acquisition [Line Items]
Total transaction-related charges	$ 3.8	$ 4.4	$ 7.3

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

Costs incurred to effect a business combination which have been expensed during the period. Such costs could include business integration costs, systems integration and conversion costs, and severance and other employee-related costs.

+ References

No definition available.

+ Details

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