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
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