Business Acquisitions (Additional Information) (Details) - USD ($) $ in Millions		12 Months Ended
	Oct. 09, 2012	Dec. 31, 2016	Jan. 02, 2016	Jan. 03, 2015
Business Acquisition [Line Items]
Business acquisition price paid in cash	$ 1,249.5
Acquisition-related transaction and integration costs		$ 0.0	$ 0.0	$ 15.2
Compensation Expense [Member]
Business Acquisition [Line Items]
Acquisition-related transaction and integration costs				3.9
Purchased Services [Member]
Business Acquisition [Line Items]
Acquisition-related transaction and integration costs				1.1
Other Integration Costs [Member]
Business Acquisition [Line Items]
Acquisition-related transaction and integration costs				$ 10.2