Industry Segments (Sales) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				12 Months Ended
	Mar. 30, 2014		Mar. 31, 2013		Dec. 29, 2013
Revenue from External Customer [Line Items]
Net sales	$ 573.5		$ 569.4
Instrumentation [Member]
Revenue from External Customer [Line Items]
Net sales	258.9	[1]	232.7	[1]	9.4
Instrumentation [Member] | Environmental Instrumentation [Member]
Revenue from External Customer [Line Items]
Net sales	61.3		60.1
Instrumentation [Member] | Marine Instrumentation [Member]
Revenue from External Customer [Line Items]
Net sales	150.6		127.1
Instrumentation [Member] | Test and Measurement Instrumentation [Member]
Revenue from External Customer [Line Items]
Net sales	47.0		45.5
Engineered Systems [Member]
Revenue from External Customer [Line Items]
Net sales	59.4		71.2
Engineered Systems [Member] | Engineered Products and Services [Member]
Revenue from External Customer [Line Items]
Net sales	47.6		58.6
Engineered Systems [Member] | Turbine Engines [Member]
Revenue from External Customer [Line Items]
Net sales	6.1		6.0
Engineered Systems [Member] | Energy Systems [Member]
Revenue from External Customer [Line Items]
Net sales	$ 5.7		$ 6.6

[1] Our previously reported 2013 segment data has been restated to reflect a revised segment reporting structure adopted in the second quarter of 2013. The change only impacted the Instrumentation and Aerospace and Defense Electronics segments.