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Income Taxes (Reconciliation Of Income Tax Provision) (Details) | 12 Months Ended
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Dec. 28, 2019 | Dec. 29, 2018 | Dec. 30, 2017
Income Taxes [Abstract] |  |  |
Statutory U.S. federal income tax rate | 21.00% | 21.00% | 35.00%
State income taxes, net of federal tax benefit | 0.30% | 0.30% | (0.20%)
Excess tax benefits on equity awards |  |  | (3.40%)
Permanent tax differences |  | 0.40% | 0.30%
Excess foreign tax credits | (13.00%) | (14.70%) |
Net increase in valuation allowance | 11.70% | 15.80% |
Foreign income tax rate differences | 4.30% | 4.20% | (0.20%)
Foreign withholding taxes | 8.60% | 8.10% | 9.30%
U.S. tax reform |  |  | 13.10%
All other, net | 0.30% | (1.00%) | (0.30%)
Total | 33.20% | 34.10% | 53.60%

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