COVER PAGE - shares	3 Months Ended
	Mar. 31, 2020	May 01, 2020
Cover [Abstract]
Entity Registrant Name	CONSOL Energy Inc.
Document Transition Report	false
Title of 12(b) Security	Common Stock, $0.01 par value
Entity Incorporation, State or Country Code	DE
Document Quarterly Report	true
Entity Central Index Key	0001710366
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2020
Entity File Number	001-38147
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q1
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Amendment Flag	false
Entity Common Stock, Shares Outstanding		26,029,202
Entity Tax Identification Number	82-1954058
Entity Address, Address Line One	1000 CONSOL Energy Drive
Entity Address, Address Line Two	Suite 100
Entity Address, City or Town	Canonsburg
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	15317-6506
City Area Code	724
Local Phone Number	416-8300
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Trading Symbol	CEIX
Security Exchange Name	NYSE