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NON-CONTROLLING INTERESTS - Ownership Interest in SSE Holdings (Details) - shares	Dec. 26, 2018	Dec. 27, 2017
Noncontrolling Interest [Abstract]
Number of LLC Interests held by Shake Shack Inc. (in shares)	29,520,833	26,527,477
Number of LLC Interests held by Shake Shack Inc. (in percentage)	79.60%	72.10%
Number of LLC Interests held by non-controlling interest holders (in shares)	7,557,347	10,250,007
Number of LLC Interests held by non-controlling interest holders (in percentage)	20.40%	27.90%
Total LLC Interests outstanding (in shares)	37,078,180	36,777,484
Total LLC Interests outstanding (in percentage)	100.00%	100.00%

X

- Definition

Consolidation, Less than Wholly Owned Subsidiary, Number of Shares

+ References

No definition available.

+ Details

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Data Type:	xbrli:sharesItemType
Balance Type:	na
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

No definition available.

+ Details

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Period Type:	instant

X

- Definition

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

+ References

No definition available.

+ Details

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- Definition

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

+ References

No definition available.

+ Details

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- References

No definition available.

+ Details

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