v3.2.0.727
Document and Entity Information Document - shares
6 Months Ended
Jul. 01, 2015
Aug. 05, 2015
Document Information [Line Items]    
Document type 10-Q  
Amendment flag false  
Document period end date Jul. 01, 2015  
Document fiscal year focus 2015  
Document fiscal period focus Q2  
Entity registrant name Shake Shack Inc.  
Entity central index key 0001620533  
Current fiscal year end date --12-30  
Entity filer category Non-accelerated Filer  
Entity current reporting status Yes  
Class A Common Stock    
Document Information [Line Items]    
Entity common stock, shares outstanding   12,058,147
Class B Common Stock    
Document Information [Line Items]    
Entity common stock, shares outstanding   24,191,853