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Acquisitions (Schedule of Recognized Identified Assets Acquired and Liabilities Assumed) (Details) - USD ($) $ in Millions |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Feb. 13, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019 | Dec. 31, 2019
Business Acquisition [Line Items] |  |  |  |  |  |
Goodwill |  | $ 415.7 |  | $ 415.7 |  | $ 436.4
Amortization expense |  | 7.9 | $ 7.4 | 16.2 | $ 12.9 |
2020 amortization expense |  | 32.3 |  | 32.3 |  |
2021 amortization expense |  | 31.5 |  | 31.5 |  |
2022 amortization expense |  | 31.3 |  | 31.3 |  |
2023 amortization expense |  | 31.2 |  | 31.2 |  |
2024 amortization expense |  | 30.9 |  | 30.9 |  |
Cash and cash equivalents |  | 177.6 | 53.3 | 177.6 | 53.3 | $ 56.5
Caprolactone |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Cash and cash equivalents | $ 0.7 |  |  |  |  |
Accounts receivable | 15.7 |  |  |  |  |
Inventories | 21.7 |  |  |  |  |
Prepaid and other current assets | 1.9 |  |  |  |  |
Property, plant and equipment | 86.3 |  |  |  |  |
Operating lease assets, net | 1.8 |  |  |  |  |
Goodwill | 295.1 |  |  |  |  |
Other assets | 1.3 |  |  |  |  |
Total fair value of assets acquired | 715.8 |  |  |  |  |
Accounts payable | 13.6 |  |  |  |  |
Accrued expenses | 2.3 |  |  |  |  |
Long-term debt | 113.1 |  |  |  |  |
Operating lease liabilities | 1.7 |  |  |  |  |
Deferred income taxes | 45.7 |  |  |  |  |
Total fair value of liabilities assumed | 176.4 |  |  |  |  |
Cash and restricted cash acquired | 1.5 |  |  |  |  |
Total cash paid, less cash and restricted cash acquired | 537.9 |  |  |  |  |
Inventory step up |  |  | 8.4 |  | 8.4 |
Amortization expense |  | 4.7 | $ 3.9 | 9.5 | $ 5.8 |
2020 amortization expense |  | 19.0 |  | 19.0 |  |
2021 amortization expense |  | 19.0 |  | 19.0 |  |
2022 amortization expense |  | 18.9 |  | 18.9 |  |
2023 amortization expense |  | 18.8 |  | 18.8 |  |
2024 amortization expense |  | $ 18.8 |  | $ 18.8 |  |
Cash and cash equivalents | 0.7 |  |  |  |  |
Restricted cash | $ 0.8 |  |  |  |  |
Customer relationships | Caprolactone |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Weighted Average Amortization Period | 17 years |  |  |  |  |
Intangible assets | $ 159.0 |  |  |  |  |
Developed technology | Caprolactone |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Weighted Average Amortization Period | 12 years |  |  |  |  |
Intangible assets | $ 64.8 |  |  |  |  |
Brands | Caprolactone |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Weighted Average Amortization Period | 17 years |  |  |  |  |
Intangible assets | $ 67.0 |  |  |  |  |
Non-compete | Caprolactone |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Weighted Average Amortization Period | 3 years |  |  |  |  |
Intangible assets | $ 0.5 |  |  |  |  |

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