Restructuring Activities (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 03, 2015	Sep. 27, 2014	Oct. 03, 2015	Sep. 27, 2014
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	$ 1.2	$ 3.0	$ 4.6	$ 10.8
Expected future restructuring charges	12.2		12.2
Cost of Sales
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	1.2	3.0	3.5	10.5
Operating Expense
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	0.0	0.0	1.1	0.3
Employee termination expenses
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	0.0	1.8	0.1	5.2
Expected future restructuring charges	6.4		6.4
Facility and other related costs
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	0.2	$ 0.8	0.7	$ 3.7
Expected future restructuring charges	$ 5.8		$ 5.8