Goodwill and Other Intangible Assets (Goodwill by Segment) (Details) - USD ($) $ in Millions	Sep. 26, 2025	Dec. 31, 2024
Goodwill [Line Items]
Total goodwill	$ 42,948	$ 40,497
Operating segments | Biotechnology
Goodwill [Line Items]
Total goodwill	23,145	21,437
Operating segments | Life Sciences
Goodwill [Line Items]
Total goodwill	12,837	12,305
Operating segments | Diagnostics
Goodwill [Line Items]
Total goodwill	$ 6,966	$ 6,755