Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 25, 2012
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]
Balance at beginning of the period	$ 4.9	$ 4.3
Costs accrued and revenues deferred	0.2	0.2
Warranty liabilities assumed from acquisitions	0	0.5
Settlements made (in cash or kind) and revenues recognized	0	(0.3)
Balance at end of period	5.1	4.7
Less: Current portion	4.8	4.4
Noncurrent accrued product warranty and deferred warranty revenue	$ 0.3	$ 0.3
Product Warranties | Minimum
Warranty Coverage Period [Line Items]
Warranty coverage period	1 year
Product Warranties | Maximum
Warranty Coverage Period [Line Items]
Warranty coverage period	10 years