Goodwill And Other Intangible Assets (Rollforward Of Goodwill) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Goodwill [Roll Forward]
Balance at beginning of year	$ 23,826.9	$ 21,014.9
Attributable to acquisitions	267.6	3,061.8	$ 9,841.0
Adjustments due to finalization of purchase price adjustments	(49.9)	92.6
Foreign currency translation and other	1,094.0	(342.4)
Balance at end of year	25,138.6	23,826.9	21,014.9
Operating segments | Life Sciences
Goodwill [Roll Forward]
Balance at beginning of year	11,610.3	11,308.5
Attributable to acquisitions	95.5	438.6
Adjustments due to finalization of purchase price adjustments	(19.1)	89.7
Foreign currency translation and other	648.8	(226.5)
Balance at end of year	12,335.5	11,610.3	11,308.5
Operating segments | Diagnostics
Goodwill [Roll Forward]
Balance at beginning of year	6,903.0	4,387.4
Attributable to acquisitions		2,590.5
Adjustments due to finalization of purchase price adjustments	(39.6)	(2.2)
Foreign currency translation and other	216.1	(72.7)
Balance at end of year	7,079.5	6,903.0	4,387.4
Operating segments | Dental
Goodwill [Roll Forward]
Balance at beginning of year	3,215.6	3,236.1
Attributable to acquisitions	2.8	4.2
Adjustments due to finalization of purchase price adjustments	8.8	0.0
Foreign currency translation and other	142.8	(24.7)
Balance at end of year	3,370.0	3,215.6	3,236.1
Operating segments | Environmental & Applied Solutions
Goodwill [Roll Forward]
Balance at beginning of year	2,098.0	2,082.9
Attributable to acquisitions	169.3	28.5
Adjustments due to finalization of purchase price adjustments	0.0	5.1
Foreign currency translation and other	86.3	(18.5)
Balance at end of year	$ 2,353.6	$ 2,098.0	$ 2,082.9