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Acquisitions (Details) - Linear Technology Corporation [Member]
$ / shares in Units, $ in Millions
3 Months Ended 6 Months Ended
Jul. 26, 2016
$ / shares
Apr. 29, 2017
USD ($)
Apr. 29, 2017
USD ($)
Mar. 10, 2017
$ / shares
Business Acquisition [Line Items]        
Revenue   $ 147.5 $ 147.5  
Transaction-related costs   $ 38.8 $ 46.8  
Common Stock [Member]        
Business Acquisition [Line Items]        
Common stock price (in dollars per share) | $ / shares $ 46     $ 82.20
Conversion ratio 0.2321