v3.24.0.1
Cover
Feb. 20, 2024
Cover [Abstract]  
Document Type 8-K
Document Period End Date Feb. 20, 2024
Entity Registrant Name Equitrans Midstream Corporation
Entity Incorporation, State or Country Code PA
Entity File Number 001-38629
Entity Tax Identification Number 83-0516635
Entity Address, Address Line One 2200 Energy Drive
Entity Address, Postal Zip Code 15317
Entity Address, City or Town Canonsburg,
Entity Address, State or Province PA
City Area Code 724
Local Phone Number 271-7600
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common Stock, no par value
Trading Symbol ETRN
Security Exchange Name NYSE
Entity Emerging Growth Company false
Entity Central Index Key 0001747009
Amendment Flag false