Goodwill And Other Intangible Assets (Rollforward Of Goodwill) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Goodwill [Roll Forward]
Balance at beginning of year	$ 35,420	$ 22,713
Attributable to acquisitions	7,235	10,402	$ 217
Attributable to divestitures	(12)	(181)
Adjustments due to finalization of purchase price allocations	(11)	(3)
Foreign currency translation and other	(1,448)	2,489
Balance at end of year	41,184	35,420	22,713
Operating segments | Life Sciences
Goodwill [Roll Forward]
Balance at beginning of year	25,812	13,472
Attributable to acquisitions	7,077	10,291
Attributable to divestitures	0	(181)
Adjustments due to finalization of purchase price allocations	(11)	(3)
Foreign currency translation and other	(1,240)	2,233
Balance at end of year	31,638	25,812	13,472
Operating segments | Diagnostics
Goodwill [Roll Forward]
Balance at beginning of year	7,082	6,901
Attributable to acquisitions	110	0
Attributable to divestitures	0	0
Adjustments due to finalization of purchase price allocations	0	0
Foreign currency translation and other	(148)	181
Balance at end of year	7,044	7,082	6,901
Operating segments | Environmental & Applied Solutions
Goodwill [Roll Forward]
Balance at beginning of year	2,526	2,340
Attributable to acquisitions	48	111
Attributable to divestitures	(12)	0
Adjustments due to finalization of purchase price allocations	0	0
Foreign currency translation and other	(60)	75
Balance at end of year	$ 2,502	$ 2,526	$ 2,340