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NON-CONTROLLING INTERESTS - Ownership Interest in SSE Holdings (Details) - shares	Mar. 31, 2021	Dec. 30, 2020
Noncontrolling Interest [Line Items]
Number of LLC Interests held by Shake Shack Inc. (in shares)	39,103,239	38,717,790
Number of LLC Interests held by non-controlling interest holders (in shares)	2,921,588	2,951,188
Total LLC Interests outstanding (in shares)	42,024,827	41,668,978
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)	93.00%	92.90%
Non-Controlling Interest Holders
Noncontrolling Interest [Line Items]
Number of LLC Interests held by non-controlling interest holders (as a percentage)	7.00%	7.10%

X

- Definition

Consolidation, Less than Wholly Owned Subsidiary, Number of Shares

+ References

No definition available.

+ Details

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Period Type:	instant

X

- Definition

Consolidation, Less than Wholly Owned Subsidiary, Number of Shares Held by Noncontrolling Owners

+ References

No definition available.

+ Details

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X

- Definition

Consolidation, Less than Wholly Owned Subsidiary, Number of Shares Held by Parent

+ References

No definition available.

+ Details

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X

- Definition

Noncontrolling Interest, Total Ownership Percentage

+ References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

+ References

No definition available.

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- Definition

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

+ References

No definition available.

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- Details

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