v3.25.2
Cover Page - shares
 6 Months Ended
Jun. 30, 2025
Jul. 31, 2025
Document Information [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2025  
Document Transition Report false  
Entity File Number 001-42201  
Entity Registrant Name Summit Midstream Corporation  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 99-3056990  
Entity Address, Address Line One 910 Louisiana Street  
Entity Address, Address Line Two Suite 4200  
Entity Address, City or Town Houston  
Entity Address, State or Province TX  
Entity Address, Postal Zip Code 77002  
City Area Code 832  
Local Phone Number 413-4770  
Title of 12(b) Security Common Stock, par value $0.01 per share  
Trading Symbol SMC  
Security Exchange Name NYSE  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Central Index Key 0002024218  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q2  
Common Stock    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   12,241,864
Common Class B    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   6,524,467