NON-CONTROLLING INTERESTS - Ownership Interest in SSE Holdings (Details) - shares	Mar. 30, 2022	Dec. 29, 2021
Noncontrolling Interest [Line Items]
Number of LLC Interests held by Shake Shack Inc. (in shares)	39,218,290	39,142,397
Number of LLC Interests held by non-controlling interest holders (in shares)	2,911,587	2,921,587
Total LLC Interests outstanding (in shares)	42,129,877	42,063,984
Total LLC Interests outstanding (as a percentage)	100.00%	100.00%
Shake Shack Inc.
Noncontrolling Interest [Line Items]
Number of LLC Interests held by Shake Shack Inc. (as a percentage)	93.10%	93.10%
Non-Controlling Interest Holders
Noncontrolling Interest [Line Items]
Number of LLC Interests held by non-controlling interest holders (as a percentage)	6.90%	6.90%