Income Taxes (Schedule Of Difference Between The Tax Provision At The Statutory Federal Income Tax Rate And The Tax Provision As A Percentage Of Income Before Taxes (Effective Tax Rate)) (Details)	12 Months Ended
Jan. 03, 2020	Dec. 28, 2018	Dec. 29, 2017
Income Tax Disclosure [Abstract]
Statutory federal income tax rate	21.00%	21.00%	35.00%
Foreign income taxed at different rates	(7.00%)	(7.00%)	(15.00%)
U.S. State income taxes	2.00%	1.00%	1.00%
U.S. Federal research and development credits	(3.00%)	(4.00%)	(3.00%)
Stock-based compensation	1.00%	1.00%	2.00%
Excess tax benefit related to stock-based compensation	(2.00%)	(3.00%)	(4.00%)
Effect of U.S. tax law change	0.00%	(8.00%)	33.00%
Other US taxes on foreign operations	1.00%	2.00%
Tax reserve releases	(5.00%)	(9.00%)
Intercompany transfer of intellectual property	(60.00%)	0.00%	0.00%
Other	3.00%	4.00%	3.00%
Effective tax rate	(49.00%)	(2.00%)	52.00%

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the valuation allowance for deferred tax assets.

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