Cost Reduction Actions (Details) $ in Millions	3 Months Ended		6 Months Ended
Cost Reduction Actions (Details) $ in Millions	Jul. 01, 2017 USD ($)	Jul. 02, 2016 USD ($)	Jul. 01, 2017 USD ($) item	Jul. 02, 2016 USD ($)
Restructuring charges:
Charges (Reversals), net			$ 13.3
Asset impairment charges and lease cancellation costs
Restructuring charges:
Charges (Reversals), net	$ 0.3	$ 2.8	0.3	$ 3.2
2015/2016 Actions
Restructuring charges:
Charges (Reversals), net			$ 13.6
Number of positions reduced as a result of Cost Reduction Actions \| item			380