Cover Page - USD ($) $ in Billions	12 Months Ended
	Dec. 31, 2020	Feb. 12, 2021	Jun. 30, 2020
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2020
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	001-03551
Entity Registrant Name	EQT CORPORATION
Entity Incorporation, State or Country Code	PA
Entity Tax Identification Number	25-0464690
Entity Address, Address Line One	625 Liberty Avenue
Entity Address, Address Line Two	Suite 1700
Entity Address, City or Town	Pittsburgh
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	15222
City Area Code	412
Local Phone Number	553-5700
Title of 12(b) Security	Common Stock, no par value
Trading Symbol	EQT
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 3.0
Entity Common Stock, Shares Outstanding		278,854,465
Documents Incorporated by Reference	EQT Corporation's definitive proxy statement relating to its 2021 annual meeting of shareholders will be filed with the Securities and Exchange Commission within 120 days after the close of EQT Corporation's fiscal year ended December 31, 2020 and is incorporated by reference in Part III to the extent described therein.
Entity Central Index Key	0000033213
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Amendment Flag	false