Financial Instruments - Foreign currency derivatives (Details) - Foreign currency contracts [Member] € in Millions, ₩ in Millions, ¥ in Millions, ¥ in Millions, £ in Millions, MXN in Millions, HUF in Millions, $ in Millions	Dec. 31, 2015 USD ($)	Dec. 31, 2015 HUF	Dec. 31, 2015 JPY (¥)	Dec. 31, 2015 KRW (₩)	Dec. 31, 2015 CNY (¥)	Dec. 31, 2015 EUR (€)	Dec. 31, 2015 MXN	Dec. 31, 2014 USD ($)	Dec. 31, 2014 JPY (¥)	Dec. 31, 2014 KRW (₩)	Dec. 31, 2014 CNY (¥)	Dec. 31, 2014 EUR (€)	Dec. 31, 2014 GBP (£)
Dec - 16 | Chinese yuan
Derivative [Line Items]
Derivative, Notional Amount	$ 13.8					€ 30.5		$ 24.9
Dec - 16 | Euro
Derivative [Line Items]
Derivative, Notional Amount	30.1	HUF 3,434.5	¥ 487.1					23.5	¥ 4,371.8
Dec - 16 | Japanese yen
Derivative [Line Items]
Derivative, Notional Amount	3.0			₩ 5,998.9	¥ 92.6			3.8		₩ 6,712.5	¥ 88.6
Dec - 16 | Korean won
Derivative [Line Items]
Derivative, Notional Amount	$ 77.9					€ 2.5		22.7				€ 2.5
Sept - 16 | US dollar
Derivative [Line Items]
Derivative, Notional Amount | MXN							MXN 469.0
Dec - 15 | Euro
Derivative [Line Items]
Derivative, Notional Amount | £													£ 5.7
Dec - 15 | Korean won
Derivative [Line Items]
Derivative, Notional Amount | ¥									¥ 72.0
Dec - 15 | Mexican peso
Derivative [Line Items]
Derivative, Notional Amount | $								$ 22.6
Dec - 15 | Swedish krona
Derivative [Line Items]
Derivative, Notional Amount | €												€ 31.4