Segment Information (Sales) (Details) - USD ($) $ in Millions		3 Months Ended
		Apr. 03, 2016	Mar. 29, 2015
Revenue from External Customer [Line Items]
Net sales	[1]	$ 530.5	$ 565.0
Operating Segments | Instrumentation
Revenue from External Customer [Line Items]
Net sales	[1]	223.7	270.3
Operating Segments | Instrumentation | Marine Instrumentation
Revenue from External Customer [Line Items]
Net sales		112.9	159.5
Operating Segments | Instrumentation | Environmental Instrumentation
Revenue from External Customer [Line Items]
Net sales		68.7	67.7
Operating Segments | Instrumentation | Test and Measurement Instrumentation
Revenue from External Customer [Line Items]
Net sales		42.1	43.1
Operating Segments | Engineered Systems
Revenue from External Customer [Line Items]
Net sales	[1]	64.3	63.1
Operating Segments | Engineered Systems | Engineered Products and Services
Revenue from External Customer [Line Items]
Net sales		52.8	49.1
Operating Segments | Engineered Systems | Turbine Engines
Revenue from External Customer [Line Items]
Net sales		5.0	5.6
Operating Segments | Engineered Systems | Energy Systems
Revenue from External Customer [Line Items]
Net sales		$ 6.5	$ 8.4

[1] (a)Net sales excludes inter-segment sales of $5.1 million and $4.9 million for the first quarter of 2016 and 2015, respectively.