Other Expense, net (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Other Income and Expenses [Abstract]
Translation effects-intercompany loans	$ (5.6)	$ 11.7	$ 25.2
Value of currency forward contracts-intercompany loans	3.7	(9.3)	(25.4)
Other currency transaction effects	2.2	3.2	4.6
Interest income	(1.0)	(1.2)	(1.0)
Net loss (gain) on sales of investments and disposals of assets	0.7	(3.0)
Other miscellaneous (income) expense	(4.4)	3.3	(3.4)
Total other (income) expense, net	$ (4.4)	$ 4.7	$ 0