Financial Instruments - Foreign Currency Derivatives (Details) (Foreign currency contracts) In Millions, unless otherwise specified	Mar. 31, 2013 Brazil real Maturity December 2013 USD ($)	Dec. 31, 2012 Brazil real Maturity December 2013 USD ($)	Mar. 31, 2013 British pound Maturity December 2013 EUR (€)	Dec. 31, 2012 British pound Maturity December 2013 EUR (€)	Mar. 31, 2013 China, Yuan Renminbi Maturity February 2014 JPY (¥)	Dec. 31, 2012 China, Yuan Renminbi Maturity February 2014 JPY (¥)	Mar. 31, 2013 China, Yuan Renminbi Maturity December 2014 USD ($)	Dec. 31, 2012 China, Yuan Renminbi Maturity December 2014 USD ($)	Mar. 31, 2013 Euro Maturity December 2013 USD ($)	Mar. 31, 2013 Euro Maturity December 2013 GBP (£)	Mar. 31, 2013 Euro Maturity December 2013 JPY (¥)	Mar. 31, 2013 Euro Maturity December 2013 PLN	Dec. 31, 2012 Euro Maturity December 2013 USD ($)	Dec. 31, 2012 Euro Maturity December 2013 GBP (£)	Dec. 31, 2012 Euro Maturity December 2013 JPY (¥)	Dec. 31, 2012 Euro Maturity December 2013 PLN	Mar. 31, 2013 Euro Maturity November 2013 HUF	Dec. 31, 2012 Euro Maturity November 2013 HUF	Mar. 31, 2013 Hungary, Forint Maturity December 2013 EUR (€)	Dec. 31, 2012 Hungary, Forint Maturity December 2013 EUR (€)	Mar. 31, 2013 Japanese yen Maturity December 2013 USD ($)	Dec. 31, 2012 Japanese yen Maturity December 2013 USD ($)	Mar. 31, 2013 Korean won Maturity December 2013 USD ($)	Dec. 31, 2012 Korean won Maturity December 2013 USD ($)	Mar. 31, 2013 Korean won Maturity December 2014 EUR (€)	Dec. 31, 2012 Korean won Maturity December 2014 EUR (€)	Mar. 31, 2013 Mexican peso Maturity December 2013 USD ($)	Dec. 31, 2012 Mexican peso Maturity December 2013 USD ($)	Mar. 31, 2013 Sweden, Kronor Maturity December 2013 EUR (€)	Dec. 31, 2012 Sweden, Kronor Maturity December 2013 EUR (€)	Mar. 31, 2013 US dollar Maturity December 2013 JPY (¥)	Dec. 31, 2012 US dollar Maturity December 2013 JPY (¥)	Mar. 31, 2013 US dollar Maturity October 2013 INR	Dec. 31, 2012 US dollar Maturity October 2013 INR
Derivative [Line Items]
Notional Amount of Foreign Currency Derivatives	$ 8.3	$ 0	€ 21.6	€ 28.8	¥ 1,788.9	¥ 0	$ 26.1	$ 0	$ 17.2	£ 3.5	¥ 4,863.1	49.0	$ 15.2	£ 4.7	¥ 6,760.0	87.4	6,200.0	9,300.0	€ 4.6	€ 0	$ 7.3	$ 9.5	$ 13.0	$ 17.5	€ 27.4	€ 32.4	$ 18.5	$ 20.9	€ 16.3	€ 0	¥ 3,305.8	¥ 3,000.0	65.8	111.1