Goodwill and Other Intangible Assets (Rollforward of Goodwill) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Goodwill [Roll Forward]
Balance at beginning of year	$ 40,497	$ 41,608
Attributable to acquisitions		305
Adjustments due to finalization of purchase price allocations	9	(23)
Foreign currency translation and other	2,645	(1,393)
Balance at end of year	43,151	40,497
Operating segments | Biotechnology
Goodwill [Roll Forward]
Balance at beginning of year	21,437	22,477
Attributable to acquisitions		0
Adjustments due to finalization of purchase price allocations	0	0
Foreign currency translation and other	1,876	(1,040)
Balance at end of year	23,313	21,437
Operating segments | Life Sciences
Goodwill [Roll Forward]
Balance at beginning of year	12,305	12,221
Attributable to acquisitions		305
Adjustments due to finalization of purchase price allocations	9	(23)
Foreign currency translation and other	542	(198)
Balance at end of year	12,856	12,305
Operating segments | Diagnostics
Goodwill [Roll Forward]
Balance at beginning of year	6,755	6,910
Attributable to acquisitions		0
Adjustments due to finalization of purchase price allocations	0	0
Foreign currency translation and other	227	(155)
Balance at end of year	$ 6,982	$ 6,755