NON-CONTROLLING INTERESTS - Redemption of LLC Interests (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 27, 2023	Sep. 28, 2022	Sep. 27, 2023	Sep. 28, 2022
Limited Liability Company
Class of Stock [Line Items]
Number of LLC Interests received by Shake Shack Inc. (in shares)			181,270
Number of units redeemed (in shares)	10,000	2,000	35,000	52,074
Stock options
Class of Stock [Line Items]
Number of LLC Interests received by Shake Shack Inc. (in shares)	7,022	11,029	146,270	85,228
Redemptions by NCI Holders | Limited Liability Company
Class of Stock [Line Items]
Number of units redeemed (in shares)	10,000	2,000	35,000	52,074
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)	10,000	2,000	35,000	52,074
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)	(10,000)	(2,000)	(35,000)	(52,074)
Shares of Class B common stock surrendered and canceled (in shares)	10,000	2,000	35,000	52,074