Restructuring (2010 Restructuring) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Restructuring charges	$ 11.6	$ 1.2	$ 28.7
Restructuring Plan for 2010 [Member]
Restructuring charges			28.7
Severance Costs			19.4
Other Restructuring Costs			9.3
Professional Employees [Member] | Restructuring Plan for 2010 [Member]
Employees affected			1,000
Non-Salaried Employees [Member] | Restructuring Plan for 2010 [Member]
Employees affected			1,400
Facility Charge [Member]
Other Restructuring Costs	$ 0.2	$ 0	$ 9.3