Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies Legal Proceedings (Details)

Commitments and Contingencies Legal Proceedings (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended 12 Months Ended
Mar. 29, 2015
Mar. 27, 2016
Sep. 29, 2013
Legal Proceedings [Line Items]      
Gain Contingency, Description   Although the Company believed LGE’s claims were without merit, it deferred the recognition of revenue related to CDMA subscriber unit royalties reported and paid by LGE in the first and second quarters of fiscal 2016 because, among other reasons, the matter was submitted to arbitration for resolution. As a result of the settlement, commencing with the third quarter of fiscal 2016, the Company will no longer defer royalty revenues reported by LGE and will record greater than $200 million of revenues that were previously deferred.  
Resolution of governmental investigation, Amount $ 975.0 $ 7.5  
Other Operating Income (Expense) [Member]      
Legal Proceedings [Line Items]      
ParkerVision verdict amount     $ 173.0