Acquisitions (Pro Forma Financial Information) (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jul. 03, 2020	Jun. 28, 2019	Jul. 03, 2020	Jun. 28, 2019
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Pretax gain on sale of product lines	$ 454.6	$ 0.0	$ 454.6	$ 0.0
Gain on sale of product lines, net of tax	$ 305.0		$ 305.0
Gain on sale of product lines, net of tax, per diluted common share	$ 0.42		$ 0.42
Cytiva | Fair value adjustment to inventory
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Pro forma earnings, adjustments		167.0		391.0
Cytiva | Acquisition-related transaction costs
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Pro forma earnings, adjustments		$ 18.0	$ 59.0	$ 33.0