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Discontinued Operations (Narrative) (Details) - High-Speed Converter Business - USD ($)
$ in Millions
3 Months Ended
Jan. 01, 2017
Apr. 02, 2017
Apr. 27, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Gain on divestiture $ 1.3    
Discontinued Operations, Held-for-sale or Disposed of by Sale      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Sale of remaining HSC business to eSilicon   $ 1.5 $ 1.5
Cash proceeds from sale (including amounts held in escrow) 1.5    
Gain on divestiture $ 1.4    
Carrying value of asset sold   $ 0.1