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Derivatives and Financial Instruments - Schedule of Changes in Level 3 Instruments (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |
Balance at January 1 | $ 0.9 |  |
Payments made during year | (0.5) |  |
Unwind of discount on deferred consideration | 0.2 | $ 0.2 | $ 0.2
Remeasurement of deferred consideration (recognized in acquisition-related costs) | (0.1) | (0.9) |
Balance at December 31 | 0.5 | $ 0.9 |
Total losses for the period included in profit and loss for assets held at the end at December 31 | 0.1 |  |
Change in unrealized (gains) or losses for the period included in profit and loss for assets held at the end at December 31 | $ 0.1 |  |

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- Definition Amount of increase (decrease) in the value of a contingent consideration liability, including, but not limited to, differences arising upon settlement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e7008-128479 + Details
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