Goodwill (Goodwill by Segment) (Details) - USD ($) $ in Millions	Jun. 28, 2019	Dec. 31, 2018
Goodwill [Line Items]
Total goodwill	$ 26,074.5	$ 25,906.0
Operating segments | Life Sciences
Goodwill [Line Items]
Total goodwill	13,488.0	13,311.0
Operating segments | Diagnostics
Goodwill [Line Items]
Total goodwill	6,919.1	6,925.6
Operating segments | Dental
Goodwill [Line Items]
Total goodwill	3,321.9	3,325.5
Operating segments | Environmental & Applied Solutions
Goodwill [Line Items]
Total goodwill	$ 2,345.5	$ 2,343.9