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NATURE OF OPERATIONS (Details) - Restaurant	Dec. 31, 2025	Dec. 25, 2024
Class of Stock [Line Items]
Number of restaurants	659
Shake Shack Inc.
Class of Stock [Line Items]
Ownership percent of noncontrolling interest	94.30%	94.20%
United States | Company-operated
Class of Stock [Line Items]
Number of restaurants	373

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