v3.26.1
Cover - shares
 6 Months Ended
Jul. 01, 2026
Jul. 29, 2026
Document Information [Line Items]    
Document type 10-Q  
Document Quarterly Report true  
Document Period End Date Jul. 01, 2026  
Document Transition Report false  
Entity File Number 001-36823  
Entity registrant name SHAKE SHACK INC.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 47-1941186  
Entity Address, Address Line One 225 Varick Street  
Entity Address, Address Line Two Suite 301  
Entity Address, City or Town New York,  
Entity Address, State or Province NY  
Entity Address, Postal Zip Code 10014  
City Area Code 646  
Local Phone Number 747-7200  
Title of 12(b) Security Class A Common Stock, par value $0.001  
Trading Symbol SHAK  
Security Exchange Name NYSE  
Entity current reporting status Yes  
Entity Interactive Data Current Yes  
Entity filer category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Amendment flag false  
Document fiscal year focus 2026  
Document fiscal period focus Q2  
Entity central index key 0001620533  
Current fiscal year end date --12-30  
Class A Common Stock    
Document Information [Line Items]    
Entity common stock, shares outstanding (in shares)   40,408,149
Class B Common Stock    
Document Information [Line Items]    
Entity common stock, shares outstanding (in shares)   2,390,789