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Share-Based Compensation - Theravance Biopharma Equity Plans (Details)
12 Months Ended
Jun. 02, 2014
plan
Dec. 31, 2014
Dec. 31, 2013
item
shares
Dec. 31, 2023
shares
Share-Based Compensation        
Number of plans | plan 3      
Total number of shares available for future issuance       8,139,725
2013 Equity Incentive Plan        
Share-Based Compensation        
Total number of shares available for future issuance       5,339,942
2013 Equity Incentive Plan | Employee Stock Option [Member]        
Share-Based Compensation        
Term (in years)     10 years  
Vesting period     4 years  
Period of forfeiture of unvested option upon termination of service     3 months  
2013 Equity Incentive Plan | Employee Stock Option [Member] | Vesting after one year        
Share-Based Compensation        
Vesting period     1 year  
Vesting of RSU (as a percent)     25.00%  
2013 Equity Incentive Plan | Employee Stock Option [Member] | Monthly vesting over the remaining three years        
Share-Based Compensation        
Vesting period     3 years  
Vesting of RSU (as a percent)     75.00%  
2013 Employee Share Purchase Plan        
Share-Based Compensation        
Automatic increase in number of shares that may be issued     571,428  
Purchase price as a percentage of fair market value of stock     85.00%  
Consecutive and overlapping offering periods     24 months  
Number of purchase periods | item     4  
Duration of purchase period     6 months  
Maximum contribution as percent of compensation     15.00%  
Total number of shares available for future issuance       2,453,502
2013 Employee Share Purchase Plan | Maximum        
Share-Based Compensation        
Shares that may be issued as percent of prior year outstanding shares     1.00%  
2014 NEEIP        
Share-Based Compensation        
Total number of shares available for future issuance       346,281
2014 NEEIP | Employee Stock Option [Member]        
Share-Based Compensation        
Term (in years)   10 years    
Vesting period   4 years    
Period of forfeiture of unvested option upon termination of service   3 months    
2014 NEEIP | Employee Stock Option [Member] | Vesting after one year        
Share-Based Compensation        
Vesting period   1 year    
Vesting of RSU (as a percent)   25.00%    
2014 NEEIP | Employee Stock Option [Member] | Monthly vesting over the remaining three years        
Share-Based Compensation        
Vesting period   3 years    
Vesting of RSU (as a percent)   75.00%