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Acquisitions - Narrative (Details) $ in Millions |  | 3 Months Ended |  |
--- | --- | --- | --- | ---
Oct. 26, 2020 USD ($) | Jun. 30, 2021 USD ($) | Apr. 04, 2021 USD ($) | Sep. 30, 2020 USD ($)
Business Acquisition [Line Items] |  |  |  |
Goodwill |  |  | $ 1,434.6 | $ 1,332.0
Armitage |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Cash consideration | $ 187.7 |  |  |
Goodwill | $ 90.7 |  |  |
Armitage | Measurement Input, Royalty Rate | Valuation, Income Approach | Good Boy Trade Name |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Intangible asset, measurement input | 0.08 |  |  |
Armitage | Measurement Input, Royalty Rate | Valuation, Income Approach | Wildbird Trade Name |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Intangible asset, measurement input | 0.03 |  |  |
Armitage | Measurement Input, Discount Rate | Valuation Technique, Discounted Cash Flow |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Intangible asset, measurement input | 0.11 |  |  |
For Life Products, LLC | Forecast |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Cash consideration |  | $ 300.0 |  |

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