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Segment Information - Acquisition Related Charges (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Segment Reporting Information [Line Items] |  |  |  |
Total Transaction-related charges | $ 25.0 | $ 48.8 | $ 149.1 | $ 78.7
Legal and Professional Fees |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total Transaction-related charges | 16.9 | 48.8 | 64.7 | 78.7
Inventory Fair Value Amortization |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total Transaction-related charges | 1.3 | 0.0 | 69.6 | 0.0
Selling, General and Administrative Expenses | Cheminova |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total Transaction-related charges | $ 6.8 | $ 0.0 | $ 14.8 | $ 0.0

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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=84229725&loc=d3e1043-128460 + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
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- Details
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Data Type: | na
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- Details
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Data Type: | na
Balance Type: |
Period Type: |