Segment Information (Sales) (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 27, 2015	Sep. 28, 2014	Sep. 27, 2015	Sep. 28, 2014
Revenue from External Customer [Line Items]
Net sales	[1]	$ 555.4	$ 601.1	$ 1,698.1	$ 1,771.7
Instrumentation
Revenue from External Customer [Line Items]
Net sales	[1]	243.2	280.4	784.8	815.9
Instrumentation | Marine Instrumentation
Revenue from External Customer [Line Items]
Net sales		136.5	167.4	457.8	478.1
Instrumentation | Environmental Instrumentation
Revenue from External Customer [Line Items]
Net sales		67.4	66.1	202.8	196.8
Instrumentation | Test and Measurement Instrumentation
Revenue from External Customer [Line Items]
Net sales		39.3	46.9	124.2	141.0
Engineered Systems
Revenue from External Customer [Line Items]
Net sales	[1]	65.2	73.3	196.9	197.3
Engineered Systems | Engineered Products and Services
Revenue from External Customer [Line Items]
Net sales		53.1	57.1	155.7	155.0
Engineered Systems | Turbine Engines
Revenue from External Customer [Line Items]
Net sales		4.1	6.2	13.7	19.0
Engineered Systems | Energy Systems
Revenue from External Customer [Line Items]
Net sales		$ 8.0	$ 10.0	$ 27.5	$ 23.3

[1] (a)Net sales excludes inter-segment sales of $4.8 million and $14.7 million for the third quarter and nine months ended September 27, 2015, respectively, and $4.9 million and $14.8 million for the third quarter and nine months ended September 28, 2014, respectively.