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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 |  |  |  |

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