Segment Information - Detailed Segment Data (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 28, 2019	Jun. 29, 2018	Jun. 28, 2019	Jun. 29, 2018	Dec. 31, 2018
Segment Reporting Information [Line Items]
Sales	$ 1,864.7	$ 1,601.8	$ 3,457.6	$ 3,094.0
Operating profit	249.5	324.4	466.8	602.3
Interest expense, net	(44.4)	(23.9)	(69.7)	(47.2)
Other non-operating expenses, net	(0.8)	(1.1)	(0.4)	(1.8)
Earnings from continuing operations before income taxes	204.3	299.4	396.7	553.3
Assets	16,468.1		16,468.1		$ 12,905.6
Professional Instrumentation
Segment Reporting Information [Line Items]
Sales	1,133.3	889.0	2,080.6	1,760.7
Industrial Technologies
Segment Reporting Information [Line Items]
Sales	731.4	712.8	1,377.0	1,333.3
Operating Segments \| Professional Instrumentation
Segment Reporting Information [Line Items]
Sales	1,133.3	889.0	2,080.6	1,760.7
Operating profit	122.0	216.7	258.2	423.1
Assets	12,178.4		12,178.4		8,592.6
Operating Segments \| Industrial Technologies
Segment Reporting Information [Line Items]
Sales	731.4	712.8	1,377.0	1,333.3
Operating profit	152.9	134.6	258.2	228.8
Assets	3,010.5		3,010.5		3,011.2
Other
Segment Reporting Information [Line Items]
Operating profit	(25.4)	$ (26.9)	(49.6)	$ (49.6)
Assets	1,257.8		1,257.8		1,271.8
Discontinued Operations
Segment Reporting Information [Line Items]
Assets	$ 21.4		$ 21.4		$ 30.0

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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