Goodwill and Other Intangible Assets (Goodwill by Segment) (Details) - USD ($) $ in Millions	Mar. 29, 2024	Dec. 31, 2023
Goodwill [Line Items]
Total goodwill	$ 40,846	$ 41,608
Operating segments | Biotechnology
Goodwill [Line Items]
Total goodwill	21,892	22,477
Operating segments | Life Sciences
Goodwill [Line Items]
Total goodwill	12,111	12,221
Operating segments | Diagnostics
Goodwill [Line Items]
Total goodwill	$ 6,843	$ 6,910