v3.5.0.2
Document and Entity Information - shares
6 Months Ended
Jun. 30, 2016
Aug. 03, 2016
Document Information [Line Items]    
Entity Registrant Name TALLGRASS ENERGY GP, LP  
Entity Central Index Key 0001633651  
Current Fiscal Year End Date --12-31  
Entity Filer Category Non-accelerated Filer  
Document Type 10-Q  
Document Period End Date Jun. 30, 2016  
Document Fiscal Year Focus 2016  
Document Fiscal Period Focus (Q1,Q2,Q3,FY) Q2  
Trading Symbol TEGP  
Amendment Flag false  
Capital Unit, Class A    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   47,725,000
Capital Unit, Class B    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   109,504,440