XML 67 R56.htm IDEA: XBRL DOCUMENT
v3.25.2

Debt - Additional Information (Details) |  |  |  |  |  |  | 1 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Feb. 28, 2025 USD ($) TradingDay shares $ / shares | Jan. 17, 2024 USD ($) | Jan. 28, 2021 USD ($) TradingDay shares $ / shares | Jan. 25, 2021 USD ($) $ / shares shares | Mar. 09, 2020 USD ($) shares TradingDay $ / shares | Mar. 04, 2020 USD ($) $ / shares shares | Feb. 28, 2025 USD ($) $ / shares shares | Jan. 31, 2024 USD ($) | Jan. 17, 2024 USD ($) | Jun. 30, 2025 USD ($) | Jun. 30, 2024 USD ($) | Jun. 30, 2025 USD ($) | Jun. 30, 2024 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2024 USD ($) | Feb. 02, 2021 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repurchase of common stock |  |  |  |  |  |  |  |  |  |  |  | $ 48,276,000 | $ 0 |  |  |  |
Interest expense |  |  |  |  |  |  |  |  |  | $ 11,592,000 | $ 8,578,000 | 21,186,000 | 17,152,000 |  |  |  |
Amortization of debt discount and issuance costs |  |  |  |  |  |  |  |  |  | 1,436,000 | 937,000 | 2,548,000 | 1,868,000 |  |  |  |
Interest payable |  |  |  |  |  |  |  |  |  | 14,411,000 |  | 14,411,000 |  |  |  | $ 11,056,000 |
Debt instrument prepaid includes final payment charge and prepayment fee |  |  |  |  |  |  |  |  |  |  |  | 459,000,000 | 473,417,000 |  |  |  |
Loss on extinguishment of debt |  |  |  |  |  |  |  |  |  | 0 | 0 | 21,155,000 | 26,590,000 |  |  |  |
Financing Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest expense |  |  |  |  |  |  |  |  |  |  | 14,300,000 | 8,500,000 | 26,200,000 |  |  |  |
Amortization of debt discount and issuance costs |  |  |  |  |  |  |  |  |  |  | 700,000 | 500,000 | 1,400,000 |  |  |  |
Interest payable | $ 8,000,000 |  |  |  |  |  | $ 8,000,000 |  |  |  |  |  |  |  |  |  |
Debt instrument prepaid includes final payment charge and prepayment fee | 467,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Prepayment fee | 9,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss on extinguishment of debt | 21,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate description |  | the sum of (i) the base rate plus (ii) 5.75% and (B) in the case of Term Loans bearing interest based on the three-month forward-looking term secured overnight financing rate administered by the Federal Reserve Bank of New York (“Term SOFR”), the sum of (i) three-month Term SOFR (subject to 1.00% per annum floor), plus (ii) 6.75%. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal payments | $ 450,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Base Rate plus Interest | Financing Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate |  | 5.75% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
SOFR | Financing Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate |  | 1.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
SOFR plus Interest | Financing Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate |  | 6.75% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loan Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest expense |  |  |  |  |  |  |  |  | $ 3,000,000 |  |  |  |  |  |  |  |
Amortization of debt discount and issuance costs |  |  |  |  |  |  |  |  | 400,000 |  |  |  |  |  |  |  |
Interest payable |  | $ 2,400,000 |  |  |  |  |  |  | 2,400,000 |  |  |  |  |  |  |  |
Debt instrument prepaid includes final payment charge and prepayment fee |  | 475,800,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Prepayment fee |  | 9,100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exit cost |  | 8,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Transaction-related fees |  | 300,000 |  |  |  |  |  |  | 300,000 |  |  |  |  |  |  |  |
Loss on extinguishment of debt |  | 26,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal payments |  | $ 455,400,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loan Agreement | Financing Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Prepayment percentage |  | 3.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share Repurchase Transactions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repurchase of common stock |  |  |  |  |  |  | $ 48,300,000 |  |  |  |  |  |  |  |  |  |
Stock repurchased during period, shares | shares |  |  |  |  |  |  | 1,405,411 |  |  |  |  |  |  |  |  |  |
Repurchase of common stock price per share | $ / shares | $ 34.35 |  |  |  |  |  | $ 34.35 |  |  |  |  |  |  |  |  |  |
Maximum | Financing Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument face amount |  | $ 750,000,000 |  |  |  |  |  |  | 750,000,000 |  |  |  |  |  |  |  |
Interest rate |  | 2.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2031 Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument face amount | $ 575,000,000 |  |  |  |  |  | $ 575,000,000 |  |  | $ 575,000,000 |  | $ 575,000,000 |  |  |  | 0 |
Proceeds from exercise of option to purchase additional notes | $ 75,000,000 |  |  |  |  |  | $ 75,000,000 |  |  |  |  |  |  |  |  |  |
Debt instrument issuance date | Feb. 28, 2025 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maturity year | 2031 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, frequency of interest payment | semiannually |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest payable beginning date | Sep. 01, 2025 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stated interest rate | 1.75% |  |  |  |  |  | 1.75% |  |  | 1.75% |  | 1.75% |  |  |  |  |
Maturity date | Mar. 01, 2031 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of payment terms of notes |  |  |  |  |  |  |  |  |  |  |  | The 2031 Notes are senior, unsecured obligations of BridgeBio and will accrue interest payable semiannually in arrears on March 1 and September 1 of each year, beginning on September 1, 2025, at a rate of 1.75% per year. The 2031 Notes will mature on March 1, 2031, unless earlier converted, redeemed or repurchased. |  |  |  |  |
Proceeds from issuance of notes after deducting discount and offering expenses | $ 563,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repurchase of common stock | 48,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Denomination of the principal amount of debt in consideration conversion of the notes | $ 1,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, convertible, threshold trading days | TradingDay | 20 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, convertible, threshold consecutive trading days | TradingDay | 30 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, convertible, threshold percentage of stock price trigger | 130.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of consecutive trading day period (Measurement period) for conversion of notes | 5 days |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of business days in consideration of conversion of notes | 5 days |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Threshold percentage of stock price trigger in measurement period | 98.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion rate | 20.0773 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Initial conversion price per share | $ / shares | $ 49.81 |  |  |  |  |  | $ 49.81 |  |  |  |  |  |  |  |  |  |
Debt instrument, conversion, equivalent shares of common stock | shares | 11,544,448 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of principal amount to be repurchased in fundamental change | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum threshold percentage of aggregate principal by trustee or holders | 25.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt issuance costs including initial purchasers discounts, legal and other professional fees | $ 12,000,000 |  |  |  |  |  | $ 12,000,000 |  |  |  |  |  |  |  |  |  |
Expected life of notes | 6 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest expense |  |  |  |  |  |  |  |  |  | $ 2,989,000 |  | $ 3,985,000 |  |  |  |  |
Amortization of debt discount and issuance costs |  |  |  |  |  |  |  |  |  | 474,000 |  | 631,000 |  |  |  |  |
Interest payable |  |  |  |  |  |  |  |  |  | 3,400,000 |  | 3,400,000 |  |  |  |  |
2031 Notes | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, increase in conversion rate, number of shares issuable | shares | 16,739,400 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2029 Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument face amount |  |  | $ 717,500,000 |  |  |  |  |  |  | $ 747,500,000 |  | $ 747,500,000 |  |  |  | 747,500,000 | $ 747,500,000
Proceeds from exercise of option to purchase additional notes |  |  | 67,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument option to purchase additional notes |  |  | 97,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from exercise of remaining portion of option to purchase additional notes |  |  | $ 30,000,000.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument issuance date |  |  | Jan. 28, 2021 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maturity year |  |  | 2029 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, frequency of interest payment |  |  | semiannually |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest payable beginning date |  |  | Aug. 01, 2021 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stated interest rate |  |  | 2.25% |  |  |  |  |  |  | 2.25% |  | 2.25% |  |  |  |  |
Maturity date |  |  | Feb. 01, 2029 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of payment terms of notes |  |  |  |  |  |  |  |  |  |  |  | The 2029 Notes are senior, unsecured obligations of BridgeBio and will accrue interest payable semiannually in arrears on February 1 and August 1 of each year, beginning on August 1, 2021, at a rate of 2.25% per year. The 2029 Notes will mature on February 1, 2029, unless earlier converted, redeemed or repurchased. |  |  |  |  |
Proceeds from issuance of notes after deducting discount and offering expenses |  |  | $ 731,400,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Direct offering expense |  |  | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase of capped calls |  |  | 61,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repurchase of common stock |  |  | 50,000,000.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Denomination of the principal amount of debt in consideration conversion of the notes |  |  | $ 1,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, convertible, threshold trading days | TradingDay |  |  | 20 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, convertible, threshold consecutive trading days | TradingDay |  |  | 30 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, convertible, threshold percentage of stock price trigger |  |  | 130.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of consecutive trading day period (Measurement period) for conversion of notes |  |  | 5 days |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of business days in consideration of conversion of notes |  |  | 5 days |  |  |  |  |  |  |  |  |  |  |  |  |  |
Threshold percentage of stock price trigger in measurement period |  |  | 98.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Conversion rate |  |  | 10.3050 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Initial conversion price per share | $ / shares |  |  | $ 97.04 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, conversion, equivalent shares of common stock | shares |  |  | 7,702,988 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of principal amount to be repurchased in fundamental change |  |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum threshold percentage of aggregate principal by trustee or holders |  |  | 25.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt issuance costs including initial purchasers discounts, legal and other professional fees |  |  | $ 16,100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected life of notes |  |  | 8 years |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest expense |  |  |  |  |  |  |  |  |  | $ 4,706,000 | 4,694,000 | $ 9,411,000 | 9,386,000 |  |  |  |
Amortization of debt discount and issuance costs |  |  |  |  |  |  |  |  |  | 502,000 | 490,000 | 1,002,000 | 977,000 |  |  |  |
Interest payable |  |  |  |  |  |  |  |  |  | 7,000,000 |  | 7,000,000 |  |  |  | 7,000,000 |
2029 Notes | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, increase in conversion rate, number of shares issuable | shares |  |  | 11,361,851 |  |  |  |  |  |  |  |  |  |  |  |  |  |
2027 Notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument face amount |  |  |  |  | $ 550,000,000.0 |  |  |  |  | $ 550,000,000 |  | $ 550,000,000 |  |  |  | 550,000,000 |
Proceeds from exercise of option to purchase additional notes |  |  |  |  | $ 75,000,000.0 |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument issuance date |  |  |  |  | Mar. 09, 2020 |  |  |  |  |  |  |  |  |  |  |  |
Maturity year |  |  |  |  | 2027 |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, frequency of interest payment |  |  |  |  | semi-annually |  |  |  |  |  |  |  |  |  |  |  |
Interest payable beginning date |  |  |  |  | Sep. 15, 2020 |  |  |  |  |  |  |  |  |  |  |  |
Stated interest rate |  |  |  |  | 2.50% |  |  |  |  | 2.50% |  | 2.50% |  |  |  |  |
Maturity date |  |  |  |  | Mar. 15, 2027 |  |  |  |  |  |  |  |  |  |  |  |
Description of payment terms of notes |  |  |  |  |  |  |  |  |  |  |  | The 2027 Notes will accrue interest payable semi-annually in arrears on March 15 and September 15 of each year, beginning on September 15, 2020, at a rate of 2.50% per year. The 2027 Notes will mature on March 15, 2027, unless earlier converted or repurchased |  |  |  |  |
Proceeds from issuance of notes after deducting discount and offering expenses |  |  |  |  | $ 537,000,000.0 |  |  |  |  |  |  |  |  |  |  |  |
Purchase of capped calls |  |  |  |  | 49,300,000 |  |  |  |  |  |  |  |  |  |  |  |
Repurchase of common stock |  |  |  |  | 75,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Denomination of the principal amount of debt in consideration conversion of the notes |  |  |  |  | $ 1,000 |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, convertible, threshold trading days | TradingDay |  |  |  |  | 20 |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, convertible, threshold consecutive trading days | TradingDay |  |  |  |  | 30 |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, convertible, threshold percentage of stock price trigger |  |  |  |  | 130.00% |  |  |  |  |  |  |  |  |  |  |  |
Number of consecutive trading day period (Measurement period) for conversion of notes |  |  |  |  | 5 days |  |  |  |  |  |  |  |  |  |  |  |
Number of business days in consideration of conversion of notes |  |  |  |  | 5 days |  |  |  |  |  |  |  |  |  |  |  |
Threshold percentage of stock price trigger in measurement period |  |  |  |  | 98.00% |  |  |  |  |  |  |  |  |  |  |  |
Conversion rate |  |  |  |  | 23.4151 |  |  |  |  |  |  |  |  |  |  |  |
Initial conversion price per share | $ / shares |  |  |  |  | $ 42.71 |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, conversion, equivalent shares of common stock | shares |  |  |  |  | 12,878,305 |  |  |  |  |  |  |  |  |  |  |  |
Percentage of principal amount to be repurchased in fundamental change |  |  |  |  | 100.00% |  |  |  |  |  |  |  |  |  |  |  |
Minimum threshold percentage of aggregate principal by trustee or holders |  |  |  |  | 25.00% |  |  |  |  |  |  |  |  |  |  |  |
Debt issuance costs including initial purchasers discounts, legal and other professional fees |  |  |  |  | $ 13,000,000.0 |  |  |  |  |  |  |  |  |  |  |  |
Expected life of notes |  |  |  |  | 7 years |  |  |  |  |  |  |  |  |  |  |  |
Interest expense |  |  |  |  |  |  |  |  |  | $ 3,897,000 | 3,884,000 | $ 7,790,000 | 7,766,000 |  |  |  |
Amortization of debt discount and issuance costs |  |  |  |  |  |  |  |  |  | 460,000 | $ 447,000 | 915,000 | $ 891,000 |  |  |  |
Interest payable |  |  |  |  |  |  |  |  |  | $ 4,000,000 |  | $ 4,000,000 |  |  |  | $ 4,000,000 |
2027 Notes | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument, increase in conversion rate, number of shares issuable | shares |  |  |  |  | 17,707,635 |  |  |  |  |  |  |  |  |  |  |  |
2021 Capped Call Transactions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase of capped calls |  |  |  | $ 61,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Initial conversion price per share | $ / shares |  |  |  | $ 97.04 |  |  |  |  |  |  |  |  |  |  |  |  |
Capped call transaction, cap price per share | $ / shares |  |  |  | $ 131.58 |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares covered by capped calls | shares |  |  |  | 7,702,988 |  |  |  |  |  |  |  |  |  |  |  |  |
Adjustments to additional paid in capital related to premium payments |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 61,300,000 |  |  |
2021 Capped Call Transactions | Share Repurchase Transactions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repurchase of common stock |  |  |  | $ 50,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Stock repurchased during period, shares | shares |  |  |  | 759,993 |  |  |  |  |  |  |  |  |  |  |  |  |
Repurchase of common stock price per share | $ / shares |  |  |  | $ 65.79 |  |  |  |  |  |  |  |  |  |  |  |  |
2020 Capped Call Transactions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase of capped calls |  |  |  |  |  | $ 49,300,000 |  |  |  |  |  |  |  |  |  |  |
Initial conversion price per share | $ / shares |  |  |  |  |  | $ 42.71 |  |  |  |  |  |  |  |  |  |  |
Capped call transaction, cap price per share | $ / shares |  |  |  |  |  | $ 62.12 |  |  |  |  |  |  |  |  |  |  |
Premium over last reported sale price percentage |  |  |  |  |  | 100.00% |  |  |  |  |  |  |  |  |  |  |
Number of shares covered by capped calls | shares |  |  |  |  |  | 12,878,305 |  |  |  |  |  |  |  |  |  |  |
Adjustments to additional paid in capital related to premium payments |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 49,300,000 |  |
2020 Capped Call Transactions | Share Repurchase Transactions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repurchase of common stock |  |  |  |  |  | $ 75,000,000 |  |  |  |  |  |  |  |  |  |  |
Stock repurchased during period, shares | shares |  |  |  |  |  | 2,414,681 |  |  |  |  |  |  |  |  |  |  |
Repurchase of common stock price per share | $ / shares |  |  |  |  |  | $ 31.06 |  |  |  |  |  |  |  |  |  |  |
Initial Term Loan | Financing Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument face amount |  | $ 450,000,000 |  |  |  |  |  |  | 450,000,000 |  |  |  |  |  |  |  |
Proceeds from term loan, net of issuance costs |  |  |  |  |  |  |  | $ 16,000,000 |  |  |  |  |  |  |  |  |
Initial Term Loan | Loan Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of Term Loans after deducting debt discount and issuance costs |  |  |  |  |  |  |  | $ 434,000,000 |  |  |  |  |  |  |  |  |
Incremental Term Loan | Financing Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument face amount |  | $ 300,000,000 |  |  |  |  |  |  | $ 300,000,000 |  |  |  |  |  |  |  |

X
- Definition Adjustments to additional paid in capital related to premium payments. + References No definition available. + Details
Name: | bbio_AdjustmentsToAdditionalPaidInCapitalRelatedToPremiumPayments
Namespace Prefix: | bbio_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Debt instrument capped call transaction cap price per share. + References No definition available. + Details
Name: | bbio_DebtInstrumentCappedCallTransactionCapPricePerShare
Namespace Prefix: | bbio_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Debt instrument, convertible, increase in conversion rate, number of common stock issuable. + References No definition available. + Details
Name: | bbio_DebtInstrumentConvertibleIncreaseInConversionRateNumberOfCommonStockIssuable
Namespace Prefix: | bbio_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Debt instrument convertible threshold business days. + References No definition available. + Details
Name: | bbio_DebtInstrumentConvertibleThresholdBusinessDays
Namespace Prefix: | bbio_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Debt instrument convertible threshold consecutive trading day period. + References No definition available. + Details
Name: | bbio_DebtInstrumentConvertibleThresholdConsecutiveTradingDayPeriod
Namespace Prefix: | bbio_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Debt instrument option to purchase additional notes. + References No definition available. + Details
Name: | bbio_DebtInstrumentOptionToPurchaseAdditionalNotes
Namespace Prefix: | bbio_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Debt Instrument Option to Purchase Additional Notes Exercised. + References No definition available. + Details
Name: | bbio_DebtInstrumentOptionToPurchaseAdditionalNotesExercised
Namespace Prefix: | bbio_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Debt instrument, option to purchase additional notes remaining portion exercised. + References No definition available. + Details
Name: | bbio_DebtInstrumentOptionToPurchaseAdditionalNotesRemainingPortionExercised
Namespace Prefix: | bbio_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Debt instrument prepayment percentage. + References No definition available. + Details
Name: | bbio_DebtInstrumentPrepaymentPercentage
Namespace Prefix: | bbio_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Debt instrument principal amount denomination for conversion into common stock. + References No definition available. + Details
Name: | bbio_DebtInstrumentPrincipalAmountDenominationForConversionIntoCommonStock
Namespace Prefix: | bbio_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Debt instruments maturity year. + References No definition available. + Details
Name: | bbio_DebtInstrumentsMaturityYear
Namespace Prefix: | bbio_
Data Type: | xbrli:gYearItemType
Balance Type: | na
Period Type: | duration

X
- Definition Direct offering expense. + References No definition available. + Details
Name: | bbio_DirectOfferingExpense
Namespace Prefix: | bbio_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Exit cost. + References No definition available. + Details
Name: | bbio_ExitCost
Namespace Prefix: | bbio_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Minimum threshold percentage of aggregate principal by trustee or holders. + References No definition available. + Details
Name: | bbio_MinimumThresholdPercentageOfAggregatePrincipalByTrusteeOrHolders
Namespace Prefix: | bbio_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of shares covered by capped calls. + References No definition available. + Details
Name: | bbio_NumberOfSharesCoveredByCappedCalls
Namespace Prefix: | bbio_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of principal amount to be repurchased in fundamental change. + References No definition available. + Details
Name: | bbio_PercentageOfPrincipalAmountToBeRepurchasedInFundamentalChange
Namespace Prefix: | bbio_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Prepayment fee. + References No definition available. + Details
Name: | bbio_PrepaymentFee
Namespace Prefix: | bbio_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Proceeds from issuance of notes after deducting discount and offering expenses. + References No definition available. + Details
Name: | bbio_ProceedsFromIssuanceOfNotesAfterDeductingDiscountAndOfferingExpenses
Namespace Prefix: | bbio_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Proceeds from issuance of term loans after deducting debt discount and issuance costs. + References No definition available. + Details
Name: | bbio_ProceedsFromIssuanceOfTermLoansAfterDeductingDebtDiscountAndIssuanceCosts
Namespace Prefix: | bbio_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Purchase of capped calls. + References No definition available. + Details
Name: | bbio_PurchaseOfCappedCalls
Namespace Prefix: | bbio_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Sale of stock premium over last reported sale price percentage. + References No definition available. + Details
Name: | bbio_SaleOfStockPremiumOverLastReportedSalePricePercentage
Namespace Prefix: | bbio_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Threshold percentage of stock price trigger in measurement period. + References No definition available. + Details
Name: | bbio_ThresholdPercentageOfStockPriceTriggerInMeasurementPeriod
Namespace Prefix: | bbio_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of amortization expense attributable to debt discount (premium) and debt issuance costs. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69E -Publisher FASB -URI https://asc.fasb.org/1943274/2147481568/470-20-55-69E Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69F -Publisher FASB -URI https://asc.fasb.org/1943274/2147481568/470-20-55-69F Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1F -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1F Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482925/835-30-45-3 + Details
Name: | us-gaap_AmortizationOfFinancingCostsAndDiscounts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The price per share of the conversion feature embedded in the debt instrument. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-5 + Details
Name: | us-gaap_DebtInstrumentConvertibleConversionPrice1
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Ratio applied to the conversion of debt instrument into equity with equity shares divided by debt principal amount. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)(a)(5)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-3 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-7 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-6 + Details
Name: | us-gaap_DebtInstrumentConvertibleConversionRatio1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of equity instruments that the holder of the debt instrument would receive if the debt was converted to equity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)(a)(5)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-3 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-7 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-6 + Details
Name: | us-gaap_DebtInstrumentConvertibleNumberOfEquityInstruments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Threshold period of specified consecutive trading days within which common stock price to conversion price of convertible debt instrument must exceed threshold percentage for specified number of trading days to trigger conversion feature. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentConvertibleThresholdConsecutiveTradingDays1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Minimum percentage of common stock price to conversion price of convertible debt instruments to determine eligibility of conversion. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Threshold number of specified trading days that common stock price to conversion price of convertible debt instruments must exceed threshold percentage within a specified consecutive trading period to trigger conversion feature. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentConvertibleThresholdTradingDays
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Date the debt agreement requires the first payment to be made, in YYYY-MM-DD format. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477734/942-470-50-3 + Details
Name: | us-gaap_DebtInstrumentDateOfFirstRequiredPayment1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Description of reference rate used for variable rate of debt instrument. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentDescriptionOfVariableRateBasis
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 55 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482949/835-30-55-8 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69B -Publisher FASB -URI https://asc.fasb.org/1943274/2147481568/470-20-55-69B Reference 4: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69C -Publisher FASB -URI https://asc.fasb.org/1943274/2147481568/470-20-55-69C Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482900/835-30-50-1 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482925/835-30-45-2 + Details
Name: | us-gaap_DebtInstrumentFaceAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of the fee that accompanies borrowing money under the debt instrument. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)(b)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_DebtInstrumentFeeAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Description of the frequency of periodic payments (monthly, quarterly, annual). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477734/942-470-50-3 + Details
Name: | us-gaap_DebtInstrumentFrequencyOfPeriodicPayment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)(a)(1)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B + Details
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 55 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482949/835-30-55-8 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(f)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04(a)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-3 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B Reference 5: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69B -Publisher FASB -URI https://asc.fasb.org/1943274/2147481568/470-20-55-69B Reference 6: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69C -Publisher FASB -URI https://asc.fasb.org/1943274/2147481568/470-20-55-69C Reference 7: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69E -Publisher FASB -URI https://asc.fasb.org/1943274/2147481568/470-20-55-69E Reference 8: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69F -Publisher FASB -URI https://asc.fasb.org/1943274/2147481568/470-20-55-69F Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B Reference 11: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B Reference 14: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (h) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B Reference 15: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1D -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1D Reference 16: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1D -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1D Reference 17: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1D -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1D Reference 18: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1E -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1E Reference 19: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1E -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1E Reference 20: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1E -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1E Reference 21: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1F -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1F Reference 22: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1F -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1F Reference 23: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1F -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1F Reference 24: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1F -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1F Reference 25: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1I -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1I Reference 26: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482925/835-30-45-2 Reference 27: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482900/835-30-50-1 + Details
Name: | us-gaap_DebtInstrumentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Date when the debt instrument is scheduled to be fully repaid, in YYYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(2)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)(a)(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1B + Details
Name: | us-gaap_DebtInstrumentMaturityDate
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Date the debt instrument was offered for sale, in YYYY-MM-DD format. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-3 + Details
Name: | us-gaap_DebtInstrumentOfferingDate1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Description of the payment terms of the debt instrument (for example, whether periodic payments include principal and frequency of payments) and discussion about any contingencies associated with the payment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)(a)(3)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477734/942-470-50-3 + Details
Name: | us-gaap_DebtInstrumentPaymentTerms
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of principal of debt repaid. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.6-03(i)(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479886/946-10-S99-3 + Details
Name: | us-gaap_DebtInstrumentRepaidPrincipal
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentTerm
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 1A -Publisher FASB -URI https://asc.fasb.org/1943274/2147482925/835-30-45-1A Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482925/835-30-45-2 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482900/835-30-50-1 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1D -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1D + Details
Name: | us-gaap_DeferredFinanceCostsNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481303/470-50-40-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481303/470-50-40-4 + Details
Name: | us-gaap_GainsLossesOnExtinguishmentOfDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of the cost of borrowed funds accounted for as interest expense for debt. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(8)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69E -Publisher FASB -URI https://asc.fasb.org/1943274/2147481568/470-20-55-69E Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69F -Publisher FASB -URI https://asc.fasb.org/1943274/2147481568/470-20-55-69F Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1F -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-1F Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-6 + Details
Name: | us-gaap_InterestExpenseDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Carrying value as of the balance sheet date of [accrued] interest payable on all forms of debt, including trade payables, that has been incurred and is unpaid. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(20)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_InterestPayableCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The cash outflow to reacquire common stock during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 15 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-15 + Details
Name: | us-gaap_PaymentsForRepurchaseOfCommonStock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The cash outflow for loan and debt issuance costs. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-15 + Details
Name: | us-gaap_PaymentsOfFinancingCosts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 15 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-15 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.6-03(i)(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479886/946-10-S99-3 + Details
Name: | us-gaap_RepaymentsOfLongTermDebt
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Price of a single share of a number of saleable stocks of a company. + References No definition available. + Details
Name: | us-gaap_SharePrice
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -SubTopic 10 -Topic 505 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 505 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478448/946-505-50-2 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.6-09(4)(b)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479134/946-220-S99-3 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.6-03(i)(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479886/946-10-S99-3 Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480008/505-10-S99-1 + Details
Name: | us-gaap_StockRepurchasedDuringPeriodShares
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_CreditFacilityAxis=bbio_FinancingAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_VariableRateAxis=bbio_BaseRatePlusInterestMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_VariableRateAxis=us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_VariableRateAxis=bbio_SofrPlusInterestMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LineOfCreditFacilityAxis=bbio_LoanAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ShareRepurchaseProgramAxis=bbio_ShareRepurchaseTransactionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=bbio_OnePointSevenFivePercentageConvertibleSeniorNotesDueTwoThousandAndThirtyOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=bbio_TwoPointTwoFivePercentageConvertibleSeniorNotesDueTwoThousandAndTwentyNineMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=bbio_TwoPointFiveZeroPercentageConvertibleSeniorNotesDueTwoThousandAndTwentySevenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=bbio_TwoThousandTwentyOneCappedCallTransactionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=bbio_CappedCallTransactionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=bbio_InitialTermLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=bbio_IncrementalTermLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |