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Commitments and Contingencies (Litigations and Patent Reexaminations) (Details)
 9 Months Ended 12 Months Ended
Oct. 31, 2017
patent
Sep. 01, 2016
patent
Sep. 28, 2019
USD ($)
claim
patent
Dec. 29, 2018
USD ($)
Dec. 30, 2017
USD ($)
Commitments and Contingencies          
Legal expenses excluded as a result of TRGP's payment of these expenses under the TRGP Agreement | $     $ 0 $ 1,800,000 $ 10,200,000
Inphi Litigation          
Commitments and Contingencies          
Number of patents claimed to be invalid     3    
912 Patent Reexamination          
Commitments and Contingencies          
Number of claims rejected | claim     11    
SK Hynix Litigation          
Commitments and Contingencies          
Number of patents infringed upon 2 6