Restructuring Costs (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
	Jul. 01, 2012	Jul. 01, 2012
Restructuring liability [Roll Forward]
Balance, beginning of period		$ 1.4
Cash expenditures	(0.2)	(0.8)
Balance, end of period	0.6	0.6
Other Restructuring Program [Member] | Contract costs [Member]
Restructuring liability [Roll Forward]
Balance, beginning of period		0.8
Cash expenditures		(0.3)
Balance, end of period	0.5	0.5
Other Restructuring Program [Member] | Severance and other employee benefits [Member]
Restructuring liability [Roll Forward]
Balance, beginning of period		0.6
Cash expenditures		(0.5)
Balance, end of period	$ 0.1	$ 0.1