Acquisitions (Narrative) (Details) $ / shares in Units, $ in Millions			12 Months Ended
	Apr. 30, 2020 USD ($) $ / shares	Mar. 31, 2020 USD ($)	Dec. 31, 2021 USD ($) Business_Segments Businesses	Dec. 31, 2020 USD ($) Business	Dec. 31, 2019 USD ($) Business Business_Segments
Business Acquisition [Line Items]
Net cash consideration			$ 10,961	$ 20,971	$ 331
Goodwill			$ 7,235	$ 10,402	$ 217
Number of businesses acquired | Business				5
Number of segments | Business_Segments			3		3
Pension liabilities assumed			$ 0	$ 423	$ 0
Proceeds from sale of product lines	$ 826		26	826	0
Gains on sale of product lines	455		13	455	0
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			9,561
Revenue reported by acquired entity for last annual period			300
Goodwill			6,149
Transaction costs			28
Other businesses acquired
Business Acquisition [Line Items]
Net cash consideration			1,400	256	331
Revenue reported by acquired entity for last annual period			100		72
Goodwill			$ 1,086	$ 231	$ 217
Number of businesses acquired			13	4	5
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	$ 93
Cytiva & Series of Individually Immaterial Business Acquisitions
Business Acquisition [Line Items]
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