Basis of Presentation and Significant Accounting Policies (Concentration Risk) (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended		12 Months Ended
	Jul. 01, 2017	Oct. 01, 2016	Jul. 02, 2016	Jul. 01, 2017	Jul. 02, 2016	Dec. 31, 2016
Risks and Uncertainties [Abstract]
Allowance for doubtful accounts	$ 9.3			$ 9.3		$ 9.3
Increase in allowance for doubtful accounts		$ 9.0
Product revenue | Sell-Through Distributors Concentration Risk
Risks and Uncertainties [Abstract]
Concentration Risk	75.00%			71.00%		66.00%
Revenue | Sell-Through Distributors Concentration Risk
Risks and Uncertainties [Abstract]
Concentration Risk	66.00%		59.00%	63.00%	56.00%	60.00%
Top Five Customers | Revenue | Customer Concentration Risk
Risks and Uncertainties [Abstract]
Concentration Risk	27.00%		20.00%	32.00%	22.00%
Largest Customer | Revenue | Customer Concentration Risk
Risks and Uncertainties [Abstract]
Concentration Risk	9.00%		7.00%	10.00%	6.00%
Largest Distributor Group | Trade receivables | Sell-Through Distributors Concentration Risk
Risks and Uncertainties [Abstract]
Concentration Risk				37.00%		38.00%
Second Largest Distributor Group | Trade receivables | Sell-Through Distributors Concentration Risk
Risks and Uncertainties [Abstract]
Concentration Risk				30.00%		24.00%