Acquisitions (Fair Values Of The Assets Acquired And Liabilities) (Details) - USD ($) $ in Millions		12 Months Ended
	Apr. 13, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Mar. 31, 2020
Business Acquisition [Line Items]
Trade accounts receivable		$ 487	$ 9	$ 41
Inventories		934	9	15
Property, plant and equipment		690	4	88
Goodwill		10,402	217	1,276
Other intangible assets, primarily technology, customer relationships and trade names		10,712	113	851
Trade accounts payable		(250)	(3)	(7)
Pension liabilities		(423)	0	0
Deferred tax liabilities		(1,167)	0	(21)
Other assets and liabilities, net		(414)	(18)	(46)
Net assets acquired		20,971	331	2,197
Less: noncash consideration		0	0	(24)
Net cash consideration		20,971	$ 331	2,173
Cytiva
Business Acquisition [Line Items]
Trade accounts receivable		482
Inventories		930
Property, plant and equipment		689
Goodwill		10,171
Other intangible assets, primarily technology, customer relationships and trade names		10,656
Trade accounts payable		(247)
Pension liabilities		(423)			$ (400)
Deferred tax liabilities		(1,157)
Other assets and liabilities, net		(386)
Net cash consideration		20,715
Other businesses acquired
Business Acquisition [Line Items]
Trade accounts receivable		5		5
Inventories		4		0
Property, plant and equipment		1		0
Goodwill		231		63
Other intangible assets, primarily technology, customer relationships and trade names		56		40
Trade accounts payable		(3)		(1)
Pension liabilities		0
Deferred tax liabilities		(10)		0
Other assets and liabilities, net		(28)		(12)
Net assets acquired				95
Less: noncash consideration				0
Net cash consideration		$ 256		95
IDT
Business Acquisition [Line Items]
Trade accounts receivable				36
Inventories				15
Property, plant and equipment				88
Goodwill	$ 1,200			1,213
Other intangible assets, primarily technology, customer relationships and trade names				811
Trade accounts payable				(6)
Deferred tax liabilities				(21)
Other assets and liabilities, net				(34)
Net assets acquired				2,102
Less: noncash consideration				(24)
Net cash consideration	$ 2,100			$ 2,078