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Financial Instruments - Derivatives (Details) € in Millions, ₩ in Millions, ¥ in Millions, ¥ in Millions, £ in Millions, SEK in Millions, PLN in Millions, $ in Millions | 9 Months Ended | 12 Months Ended |  |  |
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Sep. 30, 2017 PLN t | Dec. 31, 2016 PLN t | Sep. 30, 2017 USD ($) | Sep. 30, 2017 JPY (¥) | Sep. 30, 2017 KRW (₩) | Sep. 30, 2017 CNY (¥) | Sep. 30, 2017 SEK | Sep. 30, 2017 EUR (€) | Sep. 30, 2017 GBP (£) | Dec. 31, 2016 USD ($) | Dec. 31, 2016 JPY (¥) | Dec. 31, 2016 KRW (₩) | Dec. 31, 2016 CNY (¥) | Dec. 31, 2016 SEK | Dec. 31, 2016 EUR (€) | Dec. 31, 2016 GBP (£) | Jul. 20, 2016 USD ($)
Foreign currency | US dollar | Maturity December 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount of currency derivatives |  |  |  |  |  |  |  | € 100.0 |  |  |  |  |  |  | € 0.0 |  |
Foreign currency | Korean won | Maturity December 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount of currency derivatives |  |  | $ 5.1 | ¥ 208.5 |  |  |  | 3.2 |  | $ 14.2 | ¥ 539.9 |  |  |  | 0.0 |  |
Foreign currency | Japanese yen | Maturity December 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount of currency derivatives |  |  | 0.5 |  | ₩ 1,441.5 | ¥ 18.1 |  |  |  | 2.0 |  | ₩ 5,689.2 | ¥ 68.7 |  |  |  |
Foreign currency | Euro | Maturity December 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount of currency derivatives | PLN 33.6 | PLN 18.8 |  |  |  | ¥ 30.2 |  |  | £ 1.0 |  |  |  | ¥ 0.0 |  |  | £ 4.2 |
Foreign currency | Euro | Maturity May 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount of currency derivatives | SEK |  |  |  |  |  |  | SEK 267.4 |  |  |  |  |  |  | SEK 0.0 |  |  |
Foreign currency | Euro | Maturity December 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount of currency derivatives |  |  | 30.3 | ¥ 774.0 |  |  |  |  |  | 35.3 | ¥ 1,004.8 |  |  |  |  |  |
Foreign currency | Chinese renminbi | Maturity June 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount of currency derivatives |  |  |  |  |  |  |  | 31.8 |  |  |  |  |  |  | 0.0 |  |
Foreign currency | Chinese renminbi | Maturity November 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount of currency derivatives | $ |  |  | 49.0 |  |  |  |  |  |  | 33.5 |  |  |  |  |  |  |
Foreign currency | Swedish krona | Maturity December 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount of currency derivatives |  |  |  |  |  |  |  | 12.5 |  |  |  |  |  |  | 48.2 |  |
Foreign currency | Brazil, Brazil Real | Maturity January 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount of currency derivatives |  |  |  |  |  |  |  | € 1.1 |  |  |  |  |  |  | € 0.0 |  |
Foreign currency | Mexico, Pesos | Maturity December 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount of currency derivatives | $ |  |  | $ 4.9 |  |  |  |  |  |  | $ 10.5 |  |  |  |  |  |  |
Commodity contracts | Maturity December 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Mass | t | 49.1 | 213.8 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate swaps |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount of currency derivatives | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 384.0

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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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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- Definition Nominal mass used to calculate payments on a derivative instrument. + References No definition available. + Details
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