Acquisitions (Pro Forma Financial Information) (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended			9 Months Ended
	Oct. 02, 2020	Jul. 03, 2020	Sep. 27, 2019	Oct. 02, 2020	Sep. 27, 2019
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Pretax gain on sale of product lines	$ 0.0	$ 455.0	$ 0.0	$ 454.6	$ 0.0
Gain on sale of product lines, net of tax		$ 305.0
Gain on sale of product lines, net of tax, per diluted common share		$ 0.42
Cytiva
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Pretax gain on sale of product lines				455.0
Cytiva | Fair value adjustment to inventory
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Pro forma earnings, adjustments			43.0		480.0
Cytiva | Acquisition-related transaction costs
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Pro forma earnings, adjustments			$ 30.0	$ 59.0	$ 63.0