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NON-CONTROLLING INTERESTS - Ownership Interest in SSE Holdings (Details) - shares | Dec. 31, 2025 | Dec. 25, 2024
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Noncontrolling Interest [Line Items] |  |
Number of LLC Interests held by Shake Shack Inc. (in shares) | 40,254,281 | 40,068,068
Number of LLC Interests held by non-controlling interest holders (in shares) | 2,434,789 | 2,455,713
Total LLC Interests outstanding (in shares) | 42,689,070 | 42,523,781
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) | 94.30% | 94.20%
Non-Controlling Interest Holders |  |
Noncontrolling Interest [Line Items] |  |
Number of LLC Interests held by non-controlling interest holders (as a percentage) | 5.70% | 5.80%

X
- Definition Consolidation, Less than Wholly Owned Subsidiary, Number of Shares + References No definition available. + Details
Name: | shak_ConsolidationLessthanWhollyOwnedSubsidiaryNumberofShares
Namespace Prefix: | shak_
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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Namespace Prefix: | shak_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Consolidation, Less than Wholly Owned Subsidiary, Number of Shares Held by Parent + References No definition available. + Details
Name: | shak_ConsolidationLessthanWhollyOwnedSubsidiaryNumberofSharesHeldbyParent
Namespace Prefix: | shak_
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Balance Type: | na
Period Type: | instant

X
- Definition Noncontrolling Interest, Total Ownership Percentage + References No definition available. + Details
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Balance Type: | na
Period Type: | instant

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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. + References No definition available. + Details
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- 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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Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
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- Details
Name: | srt_OwnershipAxis=shak_ShakeShackInc.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_OwnershipAxis=shak_NonControllingInterestHoldersMember
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