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Financial Instruments - Balance Sheet (Details) - USD ($) $ in Millions | 6 Months Ended |
--- | --- | ---
Jun. 30, 2017 | Dec. 31, 2016
Derivatives, Fair Value [Line Items] |  |
Gain (loss) expected to be reclassified in one year or less | $ 1.5 |
Accumulated other comprehensive income (loss), cumulative changes in net gain (loss) from cash flow hedges, before tax | (20.7) | $ 35.0
Foreign currency |  |
Derivatives, Fair Value [Line Items] |  |
Gain (loss) expected to be reclassified in one year or less | 1.4 |
Accumulated other comprehensive income (loss), cumulative changes in net gain (loss) from cash flow hedges, before tax | 1.4 | 5.6
Foreign currency | Prepayments and other current assets |  |
Derivatives, Fair Value [Line Items] |  |
Derivative assets | 4.6 | 7.2
Foreign currency | Accounts payable and accrued expenses |  |
Derivatives, Fair Value [Line Items] |  |
Derivative liabilities | 8.6 | 1.1
Commodity contracts |  |
Derivatives, Fair Value [Line Items] |  |
Gain (loss) expected to be reclassified in one year or less | 0.1 |
Accumulated other comprehensive income (loss), cumulative changes in net gain (loss) from cash flow hedges, before tax | 0.1 | (0.1)
Commodity contracts | Prepayments and other current assets |  |
Derivatives, Fair Value [Line Items] |  |
Derivative assets | 0.1 | 0.1
Commodity contracts | Accounts payable and accrued expenses |  |
Derivatives, Fair Value [Line Items] |  |
Derivative liabilities | 0.0 | 0.0
Net investment hedge |  |
Derivatives, Fair Value [Line Items] |  |
Gain (loss) expected to be reclassified in one year or less | 0.0 |
Accumulated other comprehensive income (loss), cumulative changes in net gain (loss) from cash flow hedges, before tax | $ (22.2) | $ 29.5

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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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