Reportable Business Segments (Details) $ in Millions	3 Months Ended
Mar. 31, 2018 USD ($) segment	Mar. 31, 2017 USD ($)
Segment reporting information
Number of reportable business segments \| segment	2
Net sales	$ 1,866.9	$ 1,560.1
Segment operating income	376.9	314.1
Operating Segment
Segment reporting information
Segment operating income	402.4	337.6
Operating Segment \| Interconnect Products and Assemblies
Segment reporting information
Net sales	1,770.0	1,463.5
Segment operating income	391.1	323.9
Operating Segment \| Cable Products and Solutions
Segment reporting information
Net sales	96.9	96.6
Segment operating income	11.3	13.7
Inter-Segment
Segment reporting information
Net sales	11.5	12.5
Inter-Segment \| Interconnect Products and Assemblies
Segment reporting information
Net sales	2.6	2.3
Inter-Segment \| Cable Products and Solutions
Segment reporting information
Net sales	$ 8.9	$ 10.2

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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The net result for the period of deducting operating expenses from operating revenues.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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