Debt (Details) In Millions, unless otherwise specified	Dec. 31, 2012 USD ($)	Dec. 31, 2011 USD ($)	Dec. 31, 2012 Senior A Notes Due 2022 [Member]	Dec. 31, 2012 Senior B Notes Due 2024 [Member]	Dec. 31, 2012 Senior C Notes Due 2027 [Member]	Dec. 31, 2012 Series A Floating Rate Notes Due 2012 [Member] USD ($)	Dec. 31, 2011 Series A Floating Rate Notes Due 2012 [Member] USD ($)	Dec. 31, 2012 Revolving Credit Facility Due 2014 [Member] USD ($)	Dec. 31, 2011 Revolving Credit Facility Due 2014 [Member] USD ($)	Dec. 31, 2012 EURO Note A Due 2013 [Member] USD ($)	Dec. 31, 2012 EURO Note A Due 2013 [Member] EUR (€)	Dec. 31, 2011 EURO Note A Due 2013 [Member] USD ($)	Dec. 31, 2012 Term Loan Due 2014 [Member] USD ($)	Dec. 31, 2011 Term Loan Due 2014 [Member] USD ($)	Dec. 31, 2012 Series B Floating Rate Notes Due 2015 [Member] USD ($)	Dec. 31, 2011 Series B Floating Rate Notes Due 2015 [Member] USD ($)	Dec. 31, 2012 EURO Note B Due 2016 [Member] USD ($)	Dec. 31, 2012 EURO Note B Due 2016 [Member] EUR (€)	Dec. 31, 2011 EURO Note B Due 2016 [Member] USD ($)	Dec. 31, 2012 Capital leases Due through 2016 [Member] USD ($)	Dec. 31, 2011 Capital leases Due through 2016 [Member] USD ($)	Dec. 31, 2012 Revolving Credit Facility Due 2017 [Member] USD ($)	Dec. 31, 2012 Revolving Credit Facility Due 2017 [Member] JPY (¥)	Dec. 31, 2011 Revolving Credit Facility Due 2017 [Member] USD ($)	Dec. 31, 2012 Term Loan Due 2018 [Member] USD ($)	Dec. 31, 2011 Term Loan Due 2018 [Member] USD ($)	Dec. 31, 2012 Senior Notes [Member] USD ($)	Dec. 31, 2012 Senior Notes [Member] Senior A Notes Due 2022 [Member] USD ($)	Dec. 31, 2011 Senior Notes [Member] Senior A Notes Due 2022 [Member] USD ($)	Dec. 31, 2012 Senior Notes [Member] Senior B Notes Due 2024 [Member] USD ($)	Dec. 31, 2011 Senior Notes [Member] Senior B Notes Due 2024 [Member] USD ($)	Dec. 31, 2012 Senior Notes [Member] Senior C Notes Due 2027 [Member] USD ($)	Dec. 31, 2011 Senior Notes [Member] Senior C Notes Due 2027 [Member] USD ($)	Dec. 31, 2012 Convertible Debt Due 2047 [Member] USD ($)	Dec. 31, 2011 Convertible Debt Due 2047 [Member] USD ($)
Debt Instrument [Line Items]
Long-term debt	$ 411.5	$ 349.4							$ 6.4	$ 26.9		$ 26.3	$ 0.2	$ 0.2		$ 25.0	$ 80.8		$ 79.0			$ 71.5	¥ 5.8		$ 35.3		$ 168.0	$ 42.0		$ 53.0		$ 73.0		$ 3.1	$ 161.5
Debt Instrument, face amount							50.0				20.4				25.0			61.1
Capital leases																				0.7	1.0
Current portion of long-term debt	32.7	50.1
Long-term debt, excluding current portion	$ 378.8	$ 299.3
Debt instrument, stated interest rate			3.67%	3.82%	4.02%					4.215%	4.215%		8.40%		1.21%		4.38%	4.38%		6.00%		1.71%	1.71%		5.41%			3.67%		3.82%		4.02%		4.00%