Basis of Presentation and Significant Accounting Policies (Concentration Risk) (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Apr. 01, 2017	Dec. 30, 2017
Risks and Uncertainties [Abstract]
Revenue recognized on shipments to distributors	$ 8.3
Allowance for doubtful accounts	$ 9.4		$ 9.4
Revenue | Sell-Through Distributors Concentration Risk
Risks and Uncertainties [Abstract]
Concentration Risk	87.00%	71.00%
Top Five Customers | Revenue | Customer Concentration Risk
Risks and Uncertainties [Abstract]
Concentration Risk	16.00%	37.00%
Largest Customer | Revenue | Customer Concentration Risk
Risks and Uncertainties [Abstract]
Concentration Risk	4.00%	12.00%
Largest Distributor Group | Trade receivables | Sell-Through Distributors Concentration Risk
Risks and Uncertainties [Abstract]
Concentration Risk	52.00%		54.00%
Second Largest Distributor Group | Trade receivables | Sell-Through Distributors Concentration Risk
Risks and Uncertainties [Abstract]
Concentration Risk	15.00%		2.00%