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Financial Instruments - Balance Sheet (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016
Derivatives, Fair Value [Line Items] |  |
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months | $ (3.1) |
Foreign currency contracts [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months | (3.1) |
Foreign currency contracts [Member] | Other non-current assets |  |
Derivatives, Fair Value [Line Items] |  |
Derivative assets | 0.8 | $ 0.0
Foreign currency contracts [Member] | Prepayments and other current assets |  |
Derivatives, Fair Value [Line Items] |  |
Derivative assets | 0.9 | 7.2
Foreign currency contracts [Member] | Accounts payable and accrued expenses |  |
Derivatives, Fair Value [Line Items] |  |
Derivative liabilities | 5.0 | 1.1
Commodity Contract [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months | 0.0 |
Commodity Contract [Member] | Prepayments and other current assets |  |
Derivatives, Fair Value [Line Items] |  |
Derivative assets | 0.0 | 0.1
Commodity Contract [Member] | Accounts payable and accrued expenses |  |
Derivatives, Fair Value [Line Items] |  |
Derivative liabilities | $ 0.0 | $ 0.0

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- Definition The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=35736893&loc=d3e80748-113994 + Details
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- Definition Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624163-113959 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=82849420&loc=SL20226000-175313 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 4D -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=82924980&loc=SL51823488-111719 + Details
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