Commitments and Contingencies (Details) $ in Millions	6 Months Ended
	Jun. 28, 2015 USD ($)	Jun. 29, 2014 USD ($)	Jul. 28, 2015 subsidiary	Jun. 28, 2015 USD ($)	Jun. 29, 2014 USD ($)
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	0.1	0.6
Settlements made (in cash or kind), revenues recognized and other	(0.4)	(0.4)
Balance at end of period	$ 4.9	$ 4.7		$ 4.6	$ 4.9
Less: Current portion				(4.1)	(4.4)
Non-current accrued product warranty and deferred warranty revenue				$ 0.5	$ 0.5
Subsequent Event
Loss Contingencies [Line Items]
Number of subsidiaries with certain unallowable costs | subsidiary			1
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