Goodwill and Other Intangible Assets - Goodwill Rollforward (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017
Goodwill [Roll Forward]
Goodwill, beginning of period	$ 4,560.3	$ 3,445.1
Goodwill attributable to acquisitions	1,601.2	1,035.2
Foreign currency translation & other	(28.4)	80.0
Goodwill, end of period	6,133.1	4,560.3
Professional Instrumentation
Goodwill [Roll Forward]
Goodwill, beginning of period	3,331.0	2,423.7
Goodwill attributable to acquisitions	1,571.8	851.8
Foreign currency translation & other	(8.2)	55.5
Goodwill, end of period	4,894.6	3,331.0
Industrial Technologies
Goodwill [Roll Forward]
Goodwill, beginning of period	1,229.3	1,021.4
Goodwill attributable to acquisitions	29.4	183.4
Foreign currency translation & other	(20.2)	24.5
Goodwill, end of period	$ 1,238.5	$ 1,229.3

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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