Segment Information Narrative (Details) $ in Millions	3 Months Ended
	Mar. 31, 2017 USD ($) segment	Apr. 01, 2016 USD ($)
Segment Reporting [Abstract]
Number of operating segments | segment	2
Segment Reporting Information [Line Items]
Sales	$ 1,535.2	$ 1,474.7
Operating profit	294.9	263.0
Operating Segments | Professional Instrumentation
Segment Reporting Information [Line Items]
Sales	716.1	697.4
Operating profit	158.0	146.0
Operating Segments | Industrial Technologies
Segment Reporting Information [Line Items]
Sales	819.1	777.3
Operating profit	152.6	130.7
Other
Segment Reporting Information [Line Items]
Operating profit	$ (15.7)	$ (13.7)