Acquisitions (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions				3 Months Ended		6 Months Ended			12 Months Ended
	Apr. 30, 2020	Mar. 31, 2020	Mar. 01, 2019	Jul. 03, 2020	Jun. 28, 2019	Jul. 03, 2020	Dec. 31, 2019	Jun. 28, 2019	Dec. 31, 2019
Business Acquisition [Line Items]
Disposal group, product lines, revenues									$ 170.0
Proceeds from sale of product lines	$ 810.0					$ 809.8		$ 0.0
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
Goodwill						$ 10,179.5
Cytiva
Business Acquisition [Line Items]
Net cash consideration		$ 20,700.0
Cash acquired		100.0
Pension liabilities		422.8
Revenue reported by acquired entity for last annual period		3,300.0
Proceeds from underwritten public offerings of Common Stock and Mandatory Convertible Preferred Stock Series A			$ 3,000.0
Proceeds from term debt							$ 10,800.0
Proceeds from CP borrowings, Five-year facility borrowings and cash on hand									$ 6,900.0
Goodwill		$ 10,179.5