Restructuring Costs (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
	Oct. 02, 2011	Oct. 02, 2011
Year 2007 Restructuring Program [Member]
Restructuring liability [Roll Forward]
Balance, beginning of period		$ 1.3
Additional Provisions (Reversals)		0.7
Cash expenditures		(1.2)
Balance, end of period	0.8	0.8
Year 2007 Restructuring Program [Member] | Contract Termination Costs [Member]
Restructuring liability [Roll Forward]
Balance, beginning of period		1.3
Additional Provisions (Reversals)		(0.2)
Cash expenditures		(0.3)
Balance, end of period	0.8	0.8
Reduction in workforce (in numer of employees)		250
Year 2007 Restructuring Program [Member] | Other Exit Costs [Member]
Restructuring liability [Roll Forward]
Balance, beginning of period		0
Additional Provisions (Reversals)		0.9
Cash expenditures		(0.9)
Balance, end of period	0	0
Year 2009 Restructuring Program [Member]
Restructuring liability [Roll Forward]
Balance, beginning of period		2.0
Additional Provisions (Reversals)		(0.1)
Cash expenditures		(1.1)
Balance, end of period	0.8	0.8
Year 2009 Restructuring Program [Member] | Employee Severance and Other Employee Benefits [Member]
Restructuring liability [Roll Forward]
Balance, beginning of period		2.0
Additional Provisions (Reversals)		(0.1)
Cash expenditures	(0.6)	(1.1)
Balance, end of period	0.8	0.8
Reduction in workforce (in numer of employees)		200
Other Restructuring Program [Member]
Restructuring liability [Roll Forward]
Balance, beginning of period		0.1
Additional Provisions (Reversals)		(0.1)
Cash expenditures		0
Balance, end of period	0	0
Other Restructuring Program [Member] | Employee Severance and Other Employee Benefits [Member]
Restructuring liability [Roll Forward]
Balance, beginning of period		0.1
Additional Provisions (Reversals)		(0.1)
Balance, end of period	$ 0	$ 0