Goodwill and Other Intangible Assets (Narrative) (Details)	3 Months Ended		12 Months Ended
	Dec. 31, 2024 USD ($)	Sep. 27, 2024 USD ($)	Dec. 31, 2024 USD ($) reportingUnit	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Goodwill [Line Items]
Reporting units | reportingUnit			5
Goodwill	$ 40,497,000,000		$ 40,497,000,000	$ 41,608,000,000	$ 37,276,000,000
Impairment loss			$ 0	0	0
Finite-lived intangible assets, weighted-average life (in years)			11 years
Impairment charges			$ 265,000,000	77,000,000	0
Amortization of intangible assets			1,631,000,000	$ 1,491,000,000	$ 1,434,000,000
Estimated amortization expense, 2025	1,600,000,000		1,600,000,000
Estimated amortization expense, 2026	1,600,000,000		1,600,000,000
Estimated amortization expense, 2027	1,500,000,000		1,500,000,000
Estimated amortization expense, 2028	1,500,000,000		1,500,000,000
Estimated amortization expense, 2029	1,400,000,000		1,400,000,000
Life Sciences | Genomics
Goodwill [Line Items]
Impairment loss		$ 0
Impairment charges		0
Life Sciences | Trade Names
Goodwill [Line Items]
Impairment charges			222,000,000
Impairment charges, after tax			169,000,000
Indefinite-lived intangibles, gross carrying amount		$ 508,000,000
Diagnostics | Trade Names
Goodwill [Line Items]
Impairment charges	43,000,000
Minimum
Goodwill [Line Items]
Goodwill	1,200,000,000		1,200,000,000
Maximum
Goodwill [Line Items]
Goodwill	$ 22,500,000,000		$ 22,500,000,000