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NON-CONTROLLING INTERESTS - Redemption of LLC Interests (Details) - shares	12 Months Ended
	Dec. 31, 2025	Dec. 25, 2024	Dec. 27, 2023
Limited Liability Company
Class of Stock [Line Items]
Number of LLC Interests received by Shake Shack Inc. (in shares)	186,213
Number of units redeemed (in shares)	20,924	378,800	35,000
Stock options
Class of Stock [Line Items]
Number of LLC Interests received by Shake Shack Inc. (in shares)	165,289	214,953	154,317
Redemptions by NCI Holders | Limited Liability Company
Class of Stock [Line Items]
Number of units redeemed (in shares)	20,924	378,800	35,000
Common stock | Class A Common Stock
Class of Stock [Line Items]
Shares of Class A common stock issued in connection with redemptions of LLC Interests (in shares)	20,924	378,800	35,000
Common stock | Class B Common Stock
Class of Stock [Line Items]
Shares of Class A common stock issued in connection with redemptions of LLC Interests (in shares)	(20,924)	(378,800)	(35,000)
Shares of Class B common stock surrendered and canceled (in shares)	20,924	378,800	35,000

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