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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

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