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Summary of Significant Accounting Policies (Details) $ in Millions |  | 12 Months Ended
--- | --- | ---
Jul. 01, 2015 USD ($) | Dec. 31, 2016 USD ($) item segment | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($)
Summary of Significant Accounting Policies |  |  |  |
Number of reportable business segments | segment |  | 2 |  |
Number of reporting units | item |  | 2 |  |
Goodwill impairment | $ 0.0 | $ 0.0 | $ 0.0 | $ 0.0
Impairment of intangible assets |  | $ 0.0 | $ 0.0 | $ 0.0
Revenue Recognition |  |  |  |
Percentage of net sales attributable to broadband communication market (as a percent) |  | 6.00% |  |
Weighted-average assumptions: |  |  |  |
Risk free interest rate (as a percent) |  | 1.30% | 1.40% | 1.60%
Expected life |  | 4 years 7 months 6 days | 4 years 7 months 6 days | 4 years 7 months 6 days
Expected volatility (as a percent) |  | 15.00% | 17.00% | 21.00%
Expected dividend yield (as a percent) |  | 1.00% | 1.00% | 1.00%
Income tax |  |  |  |
Undistributed earnings of foreign affiliated companies |  | $ 4,182.5 |  |
Research and Development |  |  |  |
Research and development expenses for the creation of new and improved products and processes |  | $ 166.1 | $ 124.7 | $ 114.8

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