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Income Tax - Reconciliation of Statutory Federal Rate to Effective Rate (Detail) | 12 Months Ended
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Jan. 02, 2021 | Dec. 28, 2019 | Dec. 29, 2018 | Dec. 30, 2017
Effective Income Tax Rate Continuing Operations Tax Rate Reconciliation [Abstract] |  |  |  |
Federal statutory income tax rate | 21.00% | 21.00% | 21.00% | 35.00%
Stock compensation | 0.70% | 7.20% | 0.70% |
Non-deductible expenses | 1.90% | 0.80% | 0.60% |
Federal rate change effect on deferred taxes |  |  | (1.20%) |
Change in tax contingencies | 0.90% |  | (2.50%) |
Charitable product donations | (0.20%) | (5.60%) | (0.60%) |
Other, net | (1.00%) | (2.40%) | (0.90%) |
Federal loss carryback | (11.90%) |  |  |
State taxes, net of federal income tax benefit | 1.70% | (36.10%) | 1.70% |
Tax credits | (2.00%) | (50.40%) | (1.80%) |
Effective income tax rate | 11.10% | (65.50%) | 17.00% |

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- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 6.I.Fact.4) -URI http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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- Definition 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 income tax rates. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 6.I.Fact.4) -URI http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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