v3.3.1.900
Document and Entity Information - shares
3 Months Ended
Mar. 31, 2016
May. 05, 2016
Entity Information [Line Items]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Mar. 31, 2016  
Document Fiscal Year Focus 2016  
Document Fiscal Period Focus Q1  
Trading Symbol SHLX  
Entity Registrant Name Shell Midstream Partners, L.P.  
Entity Central Index Key 0001610466  
Current Fiscal Year End Date --12-31  
Entity Filer Category Large Accelerated Filer  
Common Units    
Entity Information [Line Items]    
Entity Common Stock, Shares Outstanding (in shares)   97,767,376
Subordinated Units    
Entity Information [Line Items]    
Entity Common Stock, Shares Outstanding (in shares)   67,475,068