ACQUISITIONS - Schedule of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Millions	Sep. 30, 2021	May 28, 2021	Oct. 26, 2020	Sep. 30, 2020	Sep. 30, 2019
Business Acquisition [Line Items]
Goodwill	$ 867.2			$ 627.2	$ 626.0
For Life Products, LLC
Business Acquisition [Line Items]
Cash and cash equivalents		$ 1.4
Trade receivables, net		10.2
Inventories		15.4
Prepaid expenses and other current assets		0.3
Property, plant and equipment, net		0.4
Goodwill		147.0
Intangible assets, net		128.7
Accounts payable		(1.7)
Accrued wages and salaries		(0.1)
Other current liabilities		(0.1)
Net assets acquired		$ 301.5
Armitage
Business Acquisition [Line Items]
Cash and cash equivalents			$ 6.9
Trade receivables, net			16.7
Other receivables			1.9
Inventories			16.3
Prepaid expenses and other current assets			0.2
Property, plant and equipment, net			3.0
Operating lease assets			0.1
Deferred charges and other			0.9
Goodwill			90.7
Intangible assets, net			88.6
Accounts payable			(9.2)
Accrued wages and salaries			(1.5)
Other current liabilities			(7.0)
Long-term debt, net of current portion			(51.0)
Long-term operating lease liabilities			(0.1)
Deferred income taxes			(18.0)
Other long-term liabilities			(1.8)
Net assets acquired			$ 136.7