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Taxes on Income - Reconciliation of Statutory Federal Rate to Effective Rate (Detail)
12 Months Ended
Dec. 31, 2016
Jan. 02, 2016
Jan. 03, 2015
Effective Income Tax Rate Continuing Operations Tax Rate Reconciliation [Abstract]      
Federal statutory income tax rate 35.00% 35.00% 35.00%
State taxes, net of federal income tax benefit 2.50% 1.60% 2.90%
Charitable product donations (0.50%) (0.30%) (0.40%)
Changes in tax contingencies   (0.10%) (2.70%)
Domestic production activities deduction (0.30%) (0.20%) (0.20%)
Non-deductible expenses 0.50% 0.40% 0.90%
Other, net (0.60%) 0.60% (0.90%)
Effective income tax rate 36.60% 37.00% 34.60%