Restructuring and Other Related Charges Restructuring and Other Related Charges by Segment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 19.0	$ 22.1	$ 24.3
Operating Segments [Member] | Professional Instrumentation [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	12.8	6.8	9.4
Operating Segments [Member] | Industrial Technologies [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 6.2	$ 15.3	$ 14.9