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Goodwill and Other Intangible Assets (Tables) | 9 Months Ended
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Sep. 30, 2019
Goodwill and Other Intangible Assets |
Schedule of changes in the carrying amount of goodwill by segment | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Interconnect |  | Cable |  | ​ | ​ |
​ | ​ | Products and | ​ | Products and | ​ | ​ | ​ |
​ | ​ | Assemblies | ​ | Solutions | ​ | Total |
Goodwill at December 31, 2018 | ​ | $ | 3,956.7 | ​ | $ | 146.5 | ​ | $ | 4,103.2 | ​
Acquisition-related | ​ |  | 703.5 | ​ |  | 10.6 | ​ |  | 714.1 | ​
Foreign currency translation | ​ |  | (67.3) | ​ |  | — | ​ |  | (67.3) | ​
Goodwill at September 30, 2019 | ​ | $ | 4,592.9 | ​ | $ | 157.1 | ​ | $ | 4,750.0 | ​
Summary of the Company's intangible assets | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | September 30, 2019 | ​ | December 31, 2018
​ | Weighted | ​ | Gross |  | ​ |  | Net |  | Gross |  | ​ |  | Net
​ | Average | ​ | Carrying | ​ | Accumulated | ​ | Carrying | ​ | Carrying | ​ | Accumulated | ​ | Carrying
​ | Life (years) | ​ | Amount | ​ | Amortization | ​ | Amount | ​ | Amount | ​ | Amortization | ​ | Amount
Customer relationships | 9 | ​ | $ | 440.3 | ​ | $ | 260.6 | ​ | $ | 179.7 | ​ | $ | 399.2 | ​ | $ | 234.7 | ​ | $ | 164.5
Proprietary technology | 11 | ​ |  | 155.9 | ​ |  | 70.6 | ​ | ​ | 85.3 | ​ |  | 107.5 | ​ |  | 60.5 | ​ | ​ | 47.0
Backlog and other | 2 | ​ |  | 49.7 | ​ |  | 49.4 | ​ | ​ | 0.3 | ​ |  | 34.0 | ​ |  | 33.7 | ​ | ​ | 0.3
Total intangible assets (definite-lived) | 9 | ​ | ​ | 645.9 | ​ | ​ | 380.6 | ​ | ​ | 265.3 | ​ | ​ | 540.7 | ​ | ​ | 328.9 | ​ | ​ | 211.8
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Trade names (indefinite-lived) | ​ | ​ | ​ | 186.1 | ​ | ​ | ​ | ​ | ​ | 186.1 | ​ | ​ | 186.1 | ​ | ​ | ​ | ​ | ​ | 186.1
​ | ​ | ​ | $ | 832.0 | ​ | $ | 380.6 | ​ | $ | 451.4 | ​ | $ | 726.8 | ​ | $ | 328.9 | ​ | $ | 397.9

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- Definition Tabular disclosure of amortizable finite-lived intangible assets, in total and by major class, including the gross carrying amount and accumulated amortization, and indefinite-lived intangible assets not subject to amortization, excluding goodwill, in total and by major class. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company. + References No definition available. + Details
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- References No definition available. + Details
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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13854-109267 + Details
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