v3.26.3
Cover Page - shares
9 Months Ended
Sep. 30, 2026
Oct. 09, 2026
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Sep. 30, 2026  
Document Transition Report false  
Entity File Number 001-37835  
Registrant Name Indivior Pharmaceuticals, Inc.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 41-2520873  
Entity Address, Address Line One 10710 Midlothian Turnpike, Suite 125  
Entity Address, City or Town North Chesterfield  
Entity Address, State or Province VA  
Entity Address, Postal Zip Code 23235  
City Area Code 804  
Local Phone Number 379-1090  
Title of 12(b) Security Common stock, $0.001 par value per share  
Trading Symbol INDV  
Security Exchange Name NASDAQ  
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  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   118,035,272
Central Index Key 0001625297  
Document Fiscal Year Focus 2026  
Current Fiscal Year End Date --12-31  
Document Fiscal Period Focus Q3  
Amendment Flag false