Cover Page - shares	9 Months Ended
	Sep. 30, 2019	Oct. 23, 2019
Cover page.
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2019
Document Transition Report	false
Entity File Number	1-10447
Entity Registrant Name	CABOT OIL & GAS CORPORATION
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	04-3072771
Entity Address, Address Line One	Three Memorial City Plaza
Entity Address, Address Line Two	840 Gessner Road,
Entity Address, Address Line Three	Suite 1400,
Entity Address, City or Town	Houston,
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	77024
City Area Code	281
Local Phone Number	589-4600
Title of 12(b) Security	Common Stock, par value $0.10 per share
Trading Symbol	COG
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Shell Company	false
Entity Central Index Key	0000858470
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	false
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Common Stock, Shares Outstanding		407,924,673