SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	3 Months Ended
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	Apr. 01, 2026
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited Condensed Consolidated Financial Statements include the accounts of Shake Shack Inc. and its subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation. These interim Condensed Consolidated Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") and on a basis consistent in all material respects with the accounting policies described in its Annual Report on Form 10-K for the fiscal year ended December 31, 2025 ("2025 Form 10-K"). Certain information and footnote disclosures normally presented in annual financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to the rules and regulations of the SEC. These interim Condensed Consolidated Financial Statements should be read in conjunction with the consolidated financial statements and related notes thereto included in the Company's 2025 Form 10-K. In the Company's opinion, all adjustments, which are normal and recurring in nature, necessary for a fair presentation of the financial position and results of operation have been included. Operating results for interim periods are not necessarily indicative of the results that may be expected for the full fiscal year. SSE Holdings is considered a variable interest entity. Shake Shack Inc. is the primary beneficiary as the Company has the majority economic interest in SSE Holdings and, as the sole managing member, has decision making authority that significantly affects the economic performance of the entity, while the limited partners have no substantive kick-out or participating rights. As a result, the Company consolidates SSE Holdings. The assets and liabilities of SSE Holdings represent substantially all of the Company's consolidated assets and liabilities with the exception of certain deferred taxes and liabilities under the Tax Receivable Agreement. As of April 1, 2026 and December 31, 2025, the net assets of SSE Holdings were $505,666 and $500,732, respectively. The assets of SSE Holdings are subject to certain restrictions in SSE Holdings' revolving credit agreement.
Fiscal Year	Fiscal Year The Company operates on a 52/53 week fiscal year ending on the last Wednesday of December. Fiscal 2026 contains 52 weeks and ends on December 30, 2026. Fiscal 2025 contained 53 weeks and ended on December 31, 2025. Unless otherwise stated, references to years in this report relate to fiscal years.
Use of Estimates	Use of Estimates The preparation of these Condensed Consolidated Financial Statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of sales and expenses during the reporting period. Actual results could differ from those estimates.
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements The Company reviewed all recently issued accounting pronouncements and concluded that they were not applicable or not expected to have a significant impact on its Condensed Consolidated Financial Statements.

Disclosure of accounting policy for the use of estimates in the preparation of financial statements in conformity with generally accepted accounting principles.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
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-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-05(b)(2))
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 275
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Reference 5: http://www.xbrl.org/2003/role/exampleRef
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Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 275
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 275
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Name Accounting Standards Codification
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-URI https://asc.fasb.org/1943274/2147482861/275-10-50-1

+ Details

Shake Shack Inc. 10-Q