Segment Information - Detailed Segment Data (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 29, 2019	Mar. 30, 2018
Segment Reporting Information [Line Items]
Sales	$ 1,592.9	$ 1,492.2
Operating profit	217.3	277.9
Interest expense, net	(25.3)	(23.3)
Other non-operating income (expenses), net	0.4	(0.7)
Earnings from continuing operations before income taxes	192.4	253.9
Professional Instrumentation
Segment Reporting Information [Line Items]
Sales	947.3	871.7
Industrial Technologies
Segment Reporting Information [Line Items]
Sales	645.6	620.5
Operating Segments \| Professional Instrumentation
Segment Reporting Information [Line Items]
Sales	947.3	871.7
Operating profit	136.2	206.4
Operating Segments \| Industrial Technologies
Segment Reporting Information [Line Items]
Sales	645.6	620.5
Operating profit	105.3	94.2
Corporate, Non-Segment
Segment Reporting Information [Line Items]
Operating profit	$ (24.2)	$ (22.7)

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