v3.25.1
Document and Entity Information - shares
 3 Months Ended
Mar. 31, 2025
May 02, 2025
Document and Entity Information    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Mar. 31, 2025  
Document Transition Report false  
Entity File Number 001-36033  
Entity Registrant Name THERAVANCE BIOPHARMA, INC.  
Entity Incorporation, State or Country Code KY  
Entity Tax Identification Number 98-1226628  
Entity Address, Address Line One C/O Theravance Biopharma US, LLC  
Entity Address, Address Line Two 901 Gateway Boulevard  
Entity Address, City or Town South San Francisco  
Entity Address, State or Province CA  
Entity Address, Postal Zip Code 94080  
City Area Code 650  
Local Phone Number 808-6000  
Title of 12(b) Security Ordinary Share $0.00001 Par Value  
Trading Symbol TBPH  
Security Exchange Name NASDAQ  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   50,001,332
Entity Central Index Key 0001583107  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q1  
Amendment Flag false