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Financial Instruments - Foreign currency derivatives (Details) - Foreign currency contracts [Member] € in Millions, ₩ in Millions, ¥ in Millions, ¥ in Millions, £ in Millions, PLN in Millions, MXN in Millions, HUF in Millions, $ in Millions | Dec. 31, 2016 USD ($) | Dec. 31, 2016 PLN | Dec. 31, 2016 JPY (¥) | Dec. 31, 2016 KRW (₩) | Dec. 31, 2016 CNY (¥) | Dec. 31, 2016 EUR (€) | Dec. 31, 2016 GBP (£) | Dec. 31, 2015 USD ($) | Dec. 31, 2015 HUF | Dec. 31, 2015 JPY (¥) | Dec. 31, 2015 KRW (₩) | Dec. 31, 2015 CNY (¥) | Dec. 31, 2015 EUR (€) | Dec. 31, 2015 MXN
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Dec - 17 | Chinese yuan |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative, Notional Amount | $ | $ 33.5 |  |  |  |  |  |  | $ 13.8 |  |  |  |  |  |
Dec - 17 | Euro |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative, Notional Amount | 35.3 | PLN 18.8 | ¥ 1,004.8 |  |  |  | £ 4.2 | 30.1 |  | ¥ 487.1 |  |  |  |
Dec - 17 | Japanese yen |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative, Notional Amount | 2.0 |  |  | ₩ 5,689.2 | ¥ 68.7 |  |  | 3.0 |  |  | ₩ 5,998.9 | ¥ 92.6 |  |
Dec - 17 | Korean won |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative, Notional Amount | 14.2 |  | ¥ 539.9 |  |  |  |  | $ 77.9 |  |  |  |  |  |
Dec - 17 | Mexico, Pesos |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative, Notional Amount | $ | $ 10.5 |  |  |  |  |  |  |  |  |  |  |  |  |
Dec - 17 | Sweden, Kronor |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative, Notional Amount |  |  |  |  |  | € 48.2 |  |  |  |  |  |  |  |
Sept - 16 | US dollar |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative, Notional Amount | MXN |  |  |  |  |  |  |  |  |  |  |  |  |  | MXN 469.0
Dec - 16 | Chinese yuan |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative, Notional Amount |  |  |  |  |  |  |  |  |  |  |  |  | € 30.5 |
Dec - 16 | Euro |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative, Notional Amount | HUF |  |  |  |  |  |  |  |  | HUF 3,434.5 |  |  |  |  |
Dec - 16 | Korean won |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative, Notional Amount |  |  |  |  |  |  |  |  |  |  |  |  | € 2.5 |

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