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Significant Accounting Policies And Practices (Summary Of Transactions Related Charges) (Details) - USD ($) $ in Millions | 12 Months Ended
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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 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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