Financial Instruments - Derivatives (Details) € in Millions, ₩ in Millions, ¥ in Millions, ¥ in Millions, £ in Millions, $ in Millions	9 Months Ended
	Sep. 30, 2015 USD ($) t	Sep. 30, 2015 JPY (¥)	Sep. 30, 2015 KRW (₩)	Sep. 30, 2015 CNY (¥)	Sep. 30, 2015 EUR (€)	Sep. 30, 2015 GBP (£)	Dec. 31, 2014 USD ($)	Dec. 31, 2014 JPY (¥)	Dec. 31, 2014 KRW (₩)	Dec. 31, 2014 CNY (¥)	Dec. 31, 2014 EUR (€)	Dec. 31, 2014 GBP (£)
Foreign currency | Chinese yuan | Maturity December 2016
Derivative [Line Items]
Notional amount of currency derivatives	$ 17.0				€ 38.8		$ 24.9				€ 0.0
Foreign currency | Euro | Maturity December 2015
Derivative [Line Items]
Notional amount of currency derivatives | £						£ 1.4						£ 5.7
Foreign currency | Euro | Maturity February 2016
Derivative [Line Items]
Notional amount of currency derivatives | ¥		¥ 1,571.7						¥ 4,371.8
Foreign currency | Euro | Maturity December 2016
Derivative [Line Items]
Notional amount of currency derivatives	33.6						23.5
Foreign currency | Japanese yen | Maturity December 2015
Derivative [Line Items]
Notional amount of currency derivatives	1.0		₩ 1,641.2	¥ 23.4			3.8		₩ 6,712.5	¥ 88.6
Foreign currency | Korean won | Maturity December 2015
Derivative [Line Items]
Notional amount of currency derivatives		¥ 283.0			4.7			¥ 72.0			2.5
Foreign currency | Korean won | Maturity December 2016
Derivative [Line Items]
Notional amount of currency derivatives	28.6						22.7
Foreign currency | Mexican peso | Maturity December 2015
Derivative [Line Items]
Notional amount of currency derivatives	$ 3.4						$ 22.6
Foreign currency | Swedish krona | Maturity December 2015
Derivative [Line Items]
Notional amount of currency derivatives | €					8.0						31.4
Foreign currency | US dollar | Maturity December 2015
Derivative [Line Items]
Notional amount of currency derivatives | €					€ 500.0						€ 0.0
Commodity contracts | Maturity December 2016
Derivative [Line Items]
Notional amount of copper commodity contracts | t	362.2
Interest rate swap | Maturity September 2020
Derivative [Line Items]
Notional amount of currency derivatives	$ 250.0
Interest rate swap | Maturity October 2019
Derivative [Line Items]
Notional amount of currency derivatives	$ 134.0