Goodwill and Other Intangible Assets, Goodwill (Details) $ in Millions	3 Months Ended
Mar. 31, 2019 USD ($)
Goodwill.
Goodwill, Beginning Balance	$ 4,103.2
Acquisition-related	347.1
Foreign currency translation	(10.4)
Goodwill, Ending Balance	4,439.9
Interconnect Products and Assemblies
Goodwill.
Goodwill, Beginning Balance	3,956.7
Acquisition-related	347.1
Foreign currency translation	(10.4)
Goodwill, Ending Balance	4,293.4
Cable Products and Solutions
Goodwill.
Goodwill, Beginning Balance	146.5
Goodwill, Ending Balance	$ 146.5

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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-Section 45
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-URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266

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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
-Name Accounting Standards Codification
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-Section 50
-Paragraph 1
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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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