Commitments and Contingencies (Details) $ in Millions	9 Months Ended
	Sep. 27, 2015 USD ($)	Sep. 28, 2014 USD ($)	Sep. 27, 2015 USD ($)	Jul. 28, 2015 subsidiary	Sep. 28, 2014 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Number of subsidiaries with certain unallowable costs | subsidiary				1
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]
Balance at beginning of the period	$ 4.9	$ 4.7
Costs accrued and revenues deferred	0.2	0.8
Settlements made (in cash or kind), revenues recognized and other	(0.5)	(0.5)
Balance at end of period	$ 4.9	$ 4.7	$ 4.6		$ 5.0
Less: Current portion			(4.2)		(4.6)
Non-current accrued product warranty and deferred warranty revenue			$ 0.4		$ 0.4
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