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Commitments and Contingencies d (Details) - USD ($) $ / shares in Units, $ in Millions			3 Months Ended
	Jun. 13, 2014	Feb. 03, 2014	Mar. 31, 2019	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Share repurchased, value	$ 130.0			$ 3,346.3	$ 3,382.4
Number of shares repurchased (in shares)	3,932,244		406,586
Shares acquired, average price per share (in usd per share)	$ 33.06
Settlement agreement (as defined therein) with taxing authority				1,490.0
Decrease in liability from prior year				525.0
William Russell Grace Asbestos PI Trust and William Russell Grace Asbestos PD Trust
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Original number of shares expected to be issued under settlement agreement adjusted		18,000,000
Diversey \| Tax Receivables
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Other receivables				$ 1.9
Diversey \| Guarantee Obligation Under Clawback Agreement
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Contractual obligation						$ 49.2
North American Foam Trays and Absorbent Pads
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of business		$ 929.7