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Financial Instruments - Derivatives (Details) € in Millions, ₩ in Millions, ¥ in Millions, ¥ in Millions, £ in Millions, PLN in Millions, MXN in Millions, HUF in Millions, $ in Millions | 3 Months Ended | 12 Months Ended |  |
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Mar. 31, 2016 PLN t | Dec. 31, 2015 PLN t | Mar. 31, 2016 USD ($) | Mar. 31, 2016 HUF | Mar. 31, 2016 JPY (¥) | Mar. 31, 2016 KRW (₩) | Mar. 31, 2016 CNY (¥) | Mar. 31, 2016 EUR (€) | Mar. 31, 2016 MXN | Mar. 31, 2016 GBP (£) | Dec. 31, 2015 USD ($) | Dec. 31, 2015 HUF | Dec. 31, 2015 JPY (¥) | Dec. 31, 2015 KRW (₩) | Dec. 31, 2015 CNY (¥) | Dec. 31, 2015 EUR (€) | Dec. 31, 2015 MXN | Dec. 31, 2015 GBP (£)
Foreign currency | Chinese yuan | Maturity December 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount of currency derivatives | € |  |  |  |  |  |  |  | € 21.7 |  |  |  |  |  |  |  | € 30.5 |  |
Foreign currency | Chinese yuan | Maturity July 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount of currency derivatives |  |  | $ 15.1 |  |  |  |  |  |  |  | $ 13.8 |  |  |  |  |  |  |
Foreign currency | Euro | Maturity December 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount of currency derivatives | PLN 64.8 | PLN 0.0 | 39.8 | HUF 2,560.8 | ¥ 2,735.4 |  |  |  |  | £ 3.8 | 30.1 | HUF 3,434.5 | ¥ 487.1 |  |  |  |  | £ 0.0
Foreign currency | Japanese yen | Maturity December 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount of currency derivatives |  |  | 2.0 |  |  | ₩ 4,308.6 | ¥ 70.0 |  |  |  | 3.0 |  |  | ₩ 5,998.9 | ¥ 92.6 |  |  |
Foreign currency | Korean won | Maturity December 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount of currency derivatives |  |  | 62.5 |  | ¥ 483.2 |  |  | € 1.9 |  |  | $ 77.9 |  | ¥ 0.0 |  |  | € 2.5 |  |
Foreign currency | US dollar | Maturity September 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount of currency derivatives | MXN |  |  |  |  |  |  |  |  | MXN 314.8 |  |  |  |  |  |  |  | MXN 469.0 |
Commodity contracts | Maturity December 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative, Nonmonetary Notional Amount, Mass | t | 4,525.6 | 6,273.2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate swap |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount of currency derivatives |  |  | 384.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate swap | Maturity September 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount of currency derivatives |  |  | 250.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate swap | Maturity October 2019 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount of currency derivatives |  |  | $ 134.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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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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