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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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