Goodwill and Other Intangible Assets (Goodwill by Segment) (Details) - USD ($) $ in Millions	Jul. 03, 2020	Dec. 31, 2019
Goodwill [Line Items]
Total goodwill	$ 33,227.1	$ 22,712.5
Operating segments | Life Sciences
Goodwill [Line Items]
Total goodwill	24,033.5	13,471.8
Operating segments | Diagnostics
Goodwill [Line Items]
Total goodwill	6,869.7	6,901.2
Operating segments | Environmental & Applied Solutions
Goodwill [Line Items]
Total goodwill	$ 2,323.9	$ 2,339.5