Goodwill And Other Intangible Assets (Rollforward Of Goodwill) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Goodwill [Roll Forward]
Balance at beginning of year	$ 22,580.5	$ 21,768.6
Attributable to acquisitions	217.1	1,275.4	$ 264.8
Adjustments due to finalization of purchase price adjustments	(6.9)	7.5
Foreign currency translation and other	(78.2)	(471.0)
Balance at end of year	22,712.5	22,580.5	21,768.6
Operating segments | Life Sciences
Goodwill [Roll Forward]
Balance at beginning of year	13,311.0	12,335.5
Attributable to acquisitions	213.4	1,212.6
Adjustments due to finalization of purchase price adjustments	(6.9)	2.8
Foreign currency translation and other	(45.7)	(239.9)
Balance at end of year	13,471.8	13,311.0	12,335.5
Operating segments | Diagnostics
Goodwill [Roll Forward]
Balance at beginning of year	6,925.6	7,079.5
Attributable to acquisitions	2.6	0.0
Adjustments due to finalization of purchase price adjustments	0.0	0.0
Foreign currency translation and other	(27.0)	(153.9)
Balance at end of year	6,901.2	6,925.6	7,079.5
Operating segments | Environmental & Applied Solutions
Goodwill [Roll Forward]
Balance at beginning of year	2,343.9	2,353.6
Attributable to acquisitions	1.1	62.8
Adjustments due to finalization of purchase price adjustments	0.0	4.7
Foreign currency translation and other	(5.5)	(77.2)
Balance at end of year	$ 2,339.5	$ 2,343.9	$ 2,353.6