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Goodwill and Intangible Assets (Narrative) (Details) - USD ($) | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Dec. 31, 2014 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Sep. 19, 2016
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Goodwill impairment test discount rate |  | 10.50% | 11.00% |  |
Goodwill impairment test long term growth rate |  | 3.00% | 3.00% |  |
Impairment of intangible assets |  | $ 43,300,000 | $ 41,400,000 |  |
Fairchild [Member] |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Acquired intangible assets |  | 547,800,000 |  |  |
Intangible assets acquired |  | 413,600,000 |  |  | $ 423,400,000
Standard Products Group [Member] |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Goodwill impairment |  | 0 |  |  |
Analog Solutions Group [Member] |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Goodwill impairment |  |  |  | $ 8,700,000 |
Impairment of intangible assets |  |  |  | $ 900,000 |
Impairment of long-lived assets | $ 4,700,000 |  |  |  |
In Process Research and Development [Member] |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Impairment of intangible assets |  | 6,000,000 | $ 3,800,000 |  |
IPRD projects reclassified to developed technology |  | 21,600,000 |  |  |
Image Sensor Group [Member] | In Process Research and Development [Member] |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Impairment of intangible assets |  | $ 2,200,000 |  |  |

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- Definition Amount of intangible assets, excluding goodwill, acquired at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=73530397&loc=d3e4845-128472 + Details
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- Definition Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13777-109266 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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