Financial Instruments - Derivatives (Details) € in Millions, ₩ in Millions, ¥ in Millions, ¥ in Millions, £ in Millions, SEK in Millions, PLN in Millions, $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2017 PLN t	Dec. 31, 2016 PLN t	Jun. 30, 2017 USD ($)	Jun. 30, 2017 JPY (¥)	Jun. 30, 2017 KRW (₩)	Jun. 30, 2017 CNY (¥)	Jun. 30, 2017 SEK	Jun. 30, 2017 EUR (€)	Jun. 30, 2017 GBP (£)	Dec. 31, 2016 USD ($)	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			$ 20.0	¥ 427.9				6.5		$ 14.2	¥ 539.9				0.0
Foreign currency | Japanese yen | Maturity December 2017
Derivative [Line Items]
Notional amount of currency derivatives			1.0		₩ 2,850.5	¥ 35.0				2.0		₩ 5,689.2	¥ 68.7
Foreign currency | Euro | Maturity December 2017
Derivative [Line Items]
Notional amount of currency derivatives	PLN 67.1	PLN 18.8	20.3	¥ 1,161.7		¥ 63.9			£ 2.0	35.3	¥ 1,004.8		¥ 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 | Chinese renminbi | Maturity December 2017
Derivative [Line Items]
Notional amount of currency derivatives | $			14.7							33.5
Foreign currency | Chinese renminbi | Maturity June 2018
Derivative [Line Items]
Notional amount of currency derivatives								43.8							0.0
Foreign currency | Swedish krona | Maturity December 2017
Derivative [Line Items]
Notional amount of currency derivatives								25.1							48.2
Foreign currency | Brazil, Brazil Real | Maturity January 2018
Derivative [Line Items]
Notional amount of currency derivatives								€ 1.9							€ 0.0
Foreign currency | Mexico, Pesos | Maturity December 2017
Derivative [Line Items]
Notional amount of currency derivatives | $			$ 7.9							$ 10.5
Commodity contracts | Maturity December 2017
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount, Mass | t	100.0	213.8
Interest rate swaps
Derivative [Line Items]
Notional amount of currency derivatives | $																	$ 384.0