Quarterly report pursuant to Section 13 or 15(d)


Cover - shares
9 Months Ended
Sep. 30, 2021
Oct. 22, 2021
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Sep. 30, 2021  
Document Transition Report false  
Entity File Number 001-5507  
Entity Filer Category Non-accelerated Filer  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 06-0842255  
Entity Address, Address Line One 1201 Louisiana Street,  
Entity Address, Address Line Two Suite 3100,  
Entity Address, City or Town Houston,  
Entity Address, State or Province TX  
Entity Address, Postal Zip Code 77002  
City Area Code 832  
Local Phone Number 962-4000  
Title of 12(b) Security Common stock, par value $0.01 per share  
Trading Symbol TELL  
Security Exchange Name NYSE  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Small Business true  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   479,005,062
Amendment Flag false  
Document Fiscal Year Focus 2021  
Document Fiscal Period Focus Q3  
Entity Registrant Name TELLURIAN INC. /DE/  
Entity Central Index Key 0000061398  
Current Fiscal Year End Date --12-31