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Cover Page - USD ($)
$ in Billions
12 Months Ended
Dec. 31, 2022
Feb. 24, 2023
Jun. 30, 2022
Cover [Abstract]      
Document Type 10-K    
Document Period End Date Dec. 31, 2022    
Current Fiscal Year End Date --12-31    
Entity File Number 1-10447    
Entity Registrant Name COTERRA ENERGY INC.    
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 CTRA    
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     $ 20.2
Entity Common Stock, Shares Outstanding   768,258,911  
Documents Incorporated by Reference Portions of the Proxy Statement for the Annual Meeting of Stockholders to be held May 4, 2023 are incorporated by reference into Part III of this report.    
Entity Central Index Key 0000858470    
Document Annual Report true    
Document Transition Report false    
Document Fiscal Year Focus 2022    
Document Fiscal Period Focus FY    
Amendment Flag false