Restructuring Activities (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 04, 2015	Jun. 28, 2014	Jul. 04, 2015	Jun. 28, 2014
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	$ 2.2	$ 3.6	$ 3.4	$ 7.8
Expected future restructuring charges	5.4		5.4
Cost of Sales
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	2.0	3.3	2.3	7.5
Operating Expense
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	0.2	0.3	1.1	0.3
Employee termination expenses
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	(0.1)	2.0	0.1	3.4
Expected future restructuring charges	1.0		1.0
Facility and other related costs
Restructuring Cost and Reserve [Line Items]
Restructuring expenses	0.3	$ 1.3	0.5	$ 2.9
Expected future restructuring charges	$ 4.4		$ 4.4