Financial Instruments - Foreign currency derivatives (Details) (Foreign currency contracts [Member]) In Millions, unless otherwise specified	Dec. 31, 2012 Maturity Of Derivatives Period Three [Member] British pound EUR (€)	Dec. 31, 2013 Maturity Of Derivatives Period Three [Member] Euro USD ($)	Dec. 31, 2013 Maturity Of Derivatives Period Three [Member] Euro GBP (£)	Dec. 31, 2013 Maturity Of Derivatives Period Three [Member] Euro JPY (¥)	Dec. 31, 2013 Maturity Of Derivatives Period Three [Member] Euro PLN	Dec. 31, 2012 Maturity Of Derivatives Period Three [Member] Euro USD ($)	Dec. 31, 2012 Maturity Of Derivatives Period Three [Member] Euro GBP (£)	Dec. 31, 2012 Maturity Of Derivatives Period Three [Member] Euro JPY (¥)	Dec. 31, 2012 Maturity Of Derivatives Period Three [Member] Euro PLN	Dec. 31, 2013 Maturity Of Derivatives Period Three [Member] Japanese yen USD ($)	Dec. 31, 2012 Maturity Of Derivatives Period Three [Member] Japanese yen USD ($)	Dec. 31, 2012 Maturity Of Derivatives Period Three [Member] Korean won USD ($)	Dec. 31, 2012 Maturity Of Derivatives Period Three [Member] Mexican peso USD ($)	Dec. 31, 2013 Maturity Of Derivatives Period Three [Member] US dollar JPY (¥)	Dec. 31, 2012 Maturity Of Derivatives Period Three [Member] US dollar JPY (¥)	Dec. 31, 2013 Maturity Of Derivatives Period Five [Member] Korean won EUR (€)	Dec. 31, 2012 Maturity Of Derivatives Period Five [Member] Korean won EUR (€)	Dec. 31, 2013 Maturity Of Derivatives Period Two [Member] Japanese yen KRW	Dec. 31, 2013 Maturity Of Derivatives Period Two [Member] Korean won JPY (¥)	Dec. 31, 2013 Maturity Of Derivatives Period Two [Member] Swedish krona EUR (€)	Dec. 31, 2013 Maturity Of Derivatives Period One [Member] Euro HUF	Dec. 31, 2013 Maturity Of Derivatives Period One [Member] Euro KRW	Dec. 31, 2012 Maturity Of Derivatives Period One [Member] Euro HUF	Dec. 31, 2013 Maturity Of Derivatives Period One [Member] Japanese yen CNY	Dec. 31, 2012 Maturity Of Derivatives Period Four [Member] US dollar INR
Derivative [Line Items]
Notional in traded currency	€ 28.8	$ 29.4	£ 3.0	¥ 5,830.7	96.0	$ 15.2	£ 4.7	¥ 6,760.0	87.4	$ 4.2	$ 9.5	$ 17.5	$ 20.9	¥ 3,209.3	¥ 3,000.0	€ 23.6	€ 32.4	5,715.5	¥ 380.5	€ 33.7	6,430.5	663.1	9,300.0	84.0	111.1