Acquisitions (Narrative) (Details) $ / shares in Units, $ in Millions				12 Months Ended
	Aug. 30, 2021 USD ($)	Apr. 30, 2020 USD ($) $ / shares	Mar. 31, 2020 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2022 USD ($) businessSegment	Dec. 31, 2022 USD ($) segment	Dec. 31, 2022 USD ($) business	Dec. 31, 2021 USD ($) business segment	Dec. 31, 2020 USD ($) business	Dec. 31, 2019 USD ($)	Sep. 30, 2022 USD ($)
Business Acquisition [Line Items]
Net cash consideration				$ 637				$ 10,961	$ 20,971
Number of segments					4	4		4
Goodwill				39,752	$ 39,752	$ 39,752	$ 39,752	$ 41,184	35,420		$ 38,251
Proceeds from sale of product lines		$ 826		0				26	826
Gains on sale of product lines		455		0				13	455
Gain on sale of product lines, net of tax		$ 305						10
Gain on sale of product lines, net of tax, per diluted common share | $ / shares		$ 0.42
Certain product lines, revenues									$ 88	$ 170
Aldevron
Business Acquisition [Line Items]
Net cash consideration	$ 9,600							9,561
Goodwill								6,149
Revenue reported by acquired entity for last annual period								300
Transaction costs								$ 28
Other Business Acquisitions
Business Acquisition [Line Items]
Number of businesses acquired | business							10	13	4
Net cash consideration								$ 1,400	$ 256
Goodwill				427	$ 427	$ 427	$ 427	1,086	231
Revenue reported by acquired entity for last annual period				$ 91				100
Pension liabilities assumed									0
Cytiva
Business Acquisition [Line Items]
Net cash consideration									20,715
Goodwill									10,171
Consideration transferred			$ 20,700
Acquired cash			100
Pension liabilities assumed			$ 400						423
Proceeds from underwritten public offerings of common stock and mandatory convertible preferred stock series A										3,000
Proceeds from issuance of debt										10,800
Proceeds from commercial paper borrowings, borrowings under the Five Year Facility and cash on hand										$ 6,900
Transaction costs									$ 59
Cytiva & Series of Individually Immaterial Business Acquisitions
Business Acquisition [Line Items]
Number of businesses acquired | business									5
Revenue reported by acquired entity for last annual period									$ 3,300
Fair value adjustment to inventory | Aldevron
Business Acquisition [Line Items]
Net income (loss), including portion attributable to noncontrolling interest								30
Fair value adjustment to inventory | Cytiva
Business Acquisition [Line Items]
Net income (loss), including portion attributable to noncontrolling interest								$ 46	$ 509