Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies Legal Proceedings (Details)

Commitments and Contingencies Legal Proceedings (Details) - USD ($)
$ in Millions
12 Months Ended
Sep. 27, 2015
Sep. 29, 2013
Legal Proceedings [Line Items]    
Assessment of SEC and DOJ investigation As previously disclosed, the Company discovered, and as a part of its cooperation with these investigations informed the SEC and the DOJ of, instances in which special hiring consideration, gifts or other benefits (collectively, benefits) were provided to several individuals associated with Chinese state-owned companies or agencies. Based on the facts currently known, the Company believes the aggregate monetary value of the benefits in question to be less than $250,000, excluding employment compensation.  
Other Operating Income (Expense) [Member]    
Legal Proceedings [Line Items]    
ParkerVision verdict amount   $ 173