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Stock-Based Compensation - Additional Information (Details)			3 Months Ended		6 Months Ended
	Nov. 18, 2020 USD ($) Grantee shares	Apr. 22, 2020 USD ($) Grantee shares	Jun. 30, 2022 USD ($) Employee shares	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($) Employee $ / shares shares	Jun. 30, 2021 USD ($)	Dec. 31, 2021 shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation			$ 28,305,000	$ 32,035,000	$ 52,586,000	$ 66,931,000
Employee Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted-average grand date fair value of options granted | $ / shares					$ 6.72
2020 Stock and Equity Award Exchange Program
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation cost associated with performance-based milestone awards			$ 3,400,000	13,300,000	$ 2,500,000	27,800,000
Maximum potential milestone performance-based awards to be settled in fully-vested RSA	$ 11,700,000	$ 183,400,000
Performance-based milestone awards		$ 17,400,000
2020 Stock and Equity Award Exchange Program | Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Performance-based milestone awards period for recognition		8 months 12 days
2020 Stock and Equity Award Exchange Program | Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Performance-based milestone awards period for recognition		1 year 8 months 12 days
Employee Stock Options | 2020 Stock and Equity Award Exchange Program
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of options issued in exchange of subsidiary equity | shares	70,436	1,268,110
Restricted Stock Awards | 2020 Stock and Equity Award Exchange Program
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of RSAs issued in exchange of subsidiary equity | shares		50,145
Performance based milestone awards compensation expense settled with equity				2,500,000		6,000,000.0
Performance-Based RSAs | 2020 Stock and Equity Award Exchange Program
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Performance-Based RSAs issued in exchange of subsidiary equity | shares		22,611
Performance-Based Stock Options | 2020 Stock and Equity Award Exchange Program
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of Performance-Based stock options issued in exchange of subsidiary equity | shares	10,772
A&R 2019 Plan | 2020 Stock and Equity Award Exchange Program
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of grantees | Grantee	16	149
Number of shares issued in exchange of subsidiary equity | shares	24,924	554,064
2021 A&R Plan | Common Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common shares reserved for future issuance | shares			6,827,622		6,827,622
2019 Inducement Plan | Common Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common shares reserved for future issuance | shares			180,857		180,857
Eidos Award Exchange Plan | Common Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common shares reserved for future issuance | shares							2,802,644
A&R 2019 Plan and 2019 Inducement Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted-average grand date fair value of options granted | $ / shares					$ 5.24
Total intrinsic value of options exercised					$ 800,000
Stock-based compensation			$ 1,483,000
A&R 2019 Plan and 2019 Inducement Plan | Employee Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period					4 years
Stock-based compensation			9,400,000		$ 20,200,000
Unrecognized compensation cost			79,700		$ 79,700
Unrecognized compensation cost, period for recognition					2 years 3 months 18 days
A&R 2019 Plan and 2019 Inducement Plan | Restricted Stock Awards
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation					$ 2,968,000
Unrecognized compensation cost, period for recognition					1 year 6 months
Unrecognized compensation cost			7,200		$ 7,200
A&R 2019 Plan and 2019 Inducement Plan | Restricted Stock Units (RSUs)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation			12,100,000		24,000,000.0
Unrecognized compensation cost			126,100,000		$ 126,100,000
Unrecognized compensation cost, period for recognition					2 years 6 months
BridgeBio Equity Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Performance-based milestone awards compensation expense				1,900,000	$ 200,000	3,200,000
Stock-based compensation			$ 28,145,000	$ 31,695,000	$ 52,326,000	$ 62,726,000
BridgeBio Equity Plan | 2019 Employee Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common shares reserved for future issuance | shares			4,107,805		4,107,805
Stock-based compensation			$ 700,000		$ 1,400,000
Eidos | Eidos 2016 and 2018 Plans
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of options issued in exchange of subsidiary equity | shares					2,776,672
Number of RSUs issued in exchange of subsidiary equity | shares					25,972
Number of employees for replacement awards | Employee			88		88
Incremental compensation cost for awards modification			$ 0		$ 0

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