Acquisitions (Fair Values Of The Assets Acquired And Liabilities) (Details) - USD ($) $ in Millions		12 Months Ended
	Apr. 13, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Trade accounts receivable		$ 41.1	$ 21.6	$ 97.8
Inventories		14.8	21.3	204.8
Property, plant and equipment		88.4	9.1	161.8
Goodwill		1,275.4	267.6	3,061.8
Other intangible assets, primarily customer relationships, trade names and technology		850.7	155.1	1,867.0
In-process research and development		0.0	0.0	65.0
Trade accounts payable		(6.7)	(9.9)	(50.7)
Other assets and liabilities, net		(66.5)	(75.0)	(518.0)
Assumed debt		0.0	0.0	(1.0)
Attributable to noncontrolling interest		0.0	(4.0)	0.0
Net assets acquired		2,197.2	385.8	4,888.5
Less: noncash consideration		(23.9)	0.0	(8.4)
Net cash consideration		2,173.3	385.8	4,880.1
IDT
Business Acquisition [Line Items]
Trade accounts receivable		36.0
Inventories		14.8
Property, plant and equipment		88.2
Goodwill	$ 1,200.0	1,212.6
Other intangible assets, primarily customer relationships, trade names and technology		811.0
Trade accounts payable		(5.5)
Other assets and liabilities, net		(55.0)
Net assets acquired		2,102.1
Less: noncash consideration		(23.9)
Net cash consideration	$ 2,100.0	2,078.2
Others
Business Acquisition [Line Items]
Trade accounts receivable		5.1		36.4
Inventories		0.0		39.0
Property, plant and equipment		0.2		17.3
Goodwill		62.8	268.0	477.8
Other intangible assets, primarily customer relationships, trade names and technology		39.7		387.0
In-process research and development				0.0
Trade accounts payable		(1.2)		(9.5)
Other assets and liabilities, net		(11.5)		(65.6)
Assumed debt				0.0
Net assets acquired		95.1		882.4
Less: noncash consideration		0.0		0.0
Net cash consideration		$ 95.1	$ 386.0	882.4
Cepheid
Business Acquisition [Line Items]
Trade accounts receivable				61.4
Inventories				165.8
Property, plant and equipment				144.5
Goodwill				2,584.0
Other intangible assets, primarily customer relationships, trade names and technology				1,480.0
In-process research and development				65.0
Trade accounts payable				(41.2)
Other assets and liabilities, net				(452.4)
Assumed debt				(1.0)
Net assets acquired				4,006.1
Less: noncash consideration				(8.4)
Net cash consideration				$ 3,997.7