Restructuring Charges (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 02, 2016	Mar. 28, 2015
Restructuring Reserve [Roll Forward]
Beginning balance	$ 20.7	$ 3.2
Additional charges	5.4	1.1
Payments	(18.2)	(0.7)
Non-cash adjustments	5.1	0.0
Ending balance	13.0	$ 3.6
Employee severance
Restructuring Cost and Reserve [Line Items]
Business exit costs	7.2
Lease exit
Restructuring Cost and Reserve [Line Items]
Business exit costs	$ 5.8