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	6 Months Ended	12 Months Ended
	Jun. 30, 2016 PLN t	Dec. 31, 2015 PLN t	Jun. 30, 2016 USD ($)	Jun. 30, 2016 HUF	Jun. 30, 2016 JPY (¥)	Jun. 30, 2016 KRW (₩)	Jun. 30, 2016 CNY (¥)	Jun. 30, 2016 EUR (€)	Jun. 30, 2016 MXN	Jun. 30, 2016 GBP (£)	Dec. 31, 2015 USD ($)	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 | Swedish krona | Maturity December 2016
Derivative [Line Items]
Notional amount of currency derivatives | €								€ 2.1								€ 0.0
Foreign currency | Chinese renminbi | Maturity December 2016
Derivative [Line Items]
Notional amount of currency derivatives | €								11.8								30.5
Foreign currency | Chinese renminbi | Maturity July 2017
Derivative [Line Items]
Notional amount of currency derivatives			$ 24.3								$ 13.8
Foreign currency | Euro | Maturity December 2016
Derivative [Line Items]
Notional amount of currency derivatives	PLN 43.2	PLN 0.0	26.1	HUF 1,706.0	¥ 1,795.5					£ 2.5	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			1.3			₩ 2,555.6	¥ 46.9				3.0			₩ 5,998.9	¥ 92.6
Foreign currency | Korean won | Maturity December 2016
Derivative [Line Items]
Notional amount of currency derivatives			24.2		¥ 319.9			€ 1.2			$ 77.9		¥ 0.0			€ 2.5
Foreign currency | US dollar | Maturity September 2016
Derivative [Line Items]
Notional amount of currency derivatives | MXN									MXN 135.6								MXN 469.0
Commodity contracts | Maturity December 2016
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount, Mass | t	2,707.3	6,273.2
Interest rate swaps
Derivative [Line Items]
Notional amount of currency derivatives			384.0
Interest rate swaps | Maturity September 2020
Derivative [Line Items]
Notional amount of currency derivatives			250.0
Interest rate swaps | Maturity October 2019
Derivative [Line Items]
Notional amount of currency derivatives			$ 134.0