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INCOME TAXES - Effective Income Tax Rate Reconciliation (Details)	12 Months Ended
	Dec. 26, 2020	Dec. 28, 2019	Dec. 29, 2018
Effective income tax rate reconciliation
Statutory federal income tax rate	21.00%	21.00%	21.00%
State and local taxes (net of federal benefits)	3.40%	3.90%	3.80%
Effect of noncontrolling owned interest in earnings of partnerships		(0.10%)	(0.10%)
Tax credits, including foreign tax credit	(0.90%)	(1.30%)	(1.60%)
Change in uncertain tax positions reserve	(0.10%)	(0.10%)	0.10%
Other permanent differences	0.60%	0.50%	0.60%
Other, net	1.50%	0.30%	(0.70%)
Impact of Tax Act and reduction of corporate tax rate			(0.10%)
Effective income tax rate	25.50%	24.20%	23.00%

X

- Definition

The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate attributable to permanent differences, not otherwise listed in the existing taxonomy.

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Percentage of reported income tax expense (benefit) in excess of (less than) expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operations, attributable to the total of all provisions of the Tax Cuts and Jobs Act of 2017.

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

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-Name Accounting Standards Codification
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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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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 noncontrolling interest income (loss) exempt from income taxes.

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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 other adjustments.

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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 applicable to state and local income tax expense (benefit), net of federal tax expense (benefit).

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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 income tax contingencies. Includes, but not limited to, domestic tax contingency, foreign tax contingency, state and local tax contingency, and other contingencies.

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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 tax credits. Including, but not limited to, research credit, foreign tax credit, investment tax credit, and other tax credits.

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