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Document and Entity Information - shares
 9 Months Ended
Sep. 30, 2021
Oct. 29, 2021
Cover [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Sep. 30, 2021  
Document Fiscal Year Focus 2021  
Document Fiscal Period Focus Q3  
Trading Symbol BBIO  
Entity Registrant Name BridgeBio Pharma, Inc.  
Entity Central Index Key 0001743881  
Current Fiscal Year End Date --12-31  
Entity Filer Category Large Accelerated Filer  
Entity Current Reporting Status Yes  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity File Number 001-38959  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 84-1850815  
Entity Address, Address Line One 421 Kipling Street  
Entity Address, City or Town Palo Alto  
Entity Address, State or Province CA  
Entity Address, Postal Zip Code 94301  
City Area Code (650)  
Local Phone Number 391-9740  
Entity Common Stock, Shares Outstanding   147,166,573
Document Quarterly Report true  
Document Transition Report false  
Entity Interactive Data Current Yes  
Title of 12(b) Security Common Stock  
Security Exchange Name NASDAQ