Goodwill and Other Intangible Assets (Narrative) (Details)	3 Months Ended		6 Months Ended
	Sep. 26, 2025 reportingUnit	Jun. 27, 2025 USD ($)	Jun. 27, 2025 USD ($)	Jun. 28, 2024 USD ($)	Dec. 31, 2024 USD ($)
Property, Plant and Equipment [Line Items]
Impairment charges		$ 432,000,000	$ 447,000,000	$ 0
Goodwill impairment		0
Goodwill		42,991,000,000	42,991,000,000		$ 40,497,000,000
Reporting Unit, Change In Businesses | Subsequent event
Property, Plant and Equipment [Line Items]
Goodwill reporting units | reportingUnit	2
Reporting Units-Total | Subsequent event
Property, Plant and Equipment [Line Items]
Goodwill reporting units | reportingUnit	5
Minimum
Property, Plant and Equipment [Line Items]
Goodwill		1,200,000,000	1,200,000,000
Maximum
Property, Plant and Equipment [Line Items]
Goodwill		23,100,000,000	23,100,000,000
Facility
Property, Plant and Equipment [Line Items]
Impairment charges			15,000,000
Life Sciences
Property, Plant and Equipment [Line Items]
Impairment charges		0
Goodwill impairment		0
Life Sciences | Trade Names
Property, Plant and Equipment [Line Items]
Finite-lived intangible assets, net		$ 76,000,000	$ 76,000,000
Finite-lived intangible asset, useful life		8 years	8 years
Life Sciences | Trade Names
Property, Plant and Equipment [Line Items]
Impairment charges		$ 432,000,000	$ 432,000,000
Impairment charges, after tax		$ 328,000,000	$ 328,000,000