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Share-Based Payments - Additional Information (Details) € / shares in Units, $ / shares in Units, € in Millions |  |  | 1 Months Ended | 12 Months Ended |  |  |  |  |  |
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Aug. 19, 2019 | Aug. 18, 2017 USD ($) $ / shares | May 31, 2022 EUR (€) | May 31, 2021 EUR (€) | Sep. 30, 2019 EUR (€) shares € / shares | Sep. 30, 2019 USD ($) shares $ / shares | Dec. 31, 2023 EUR (€) shares € / shares | Dec. 31, 2023 USD ($) shares $ / shares | Dec. 31, 2022 EUR (€) shares € / shares | Dec. 31, 2021 EUR (€) shares | Dec. 31, 2020 | Oct. 09, 2023 shares | Jan. 31, 2023 EUR (€) | May 30, 2022 shares | May 17, 2021 shares | May 12, 2021 shares | Feb. 29, 2020 shares
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Share-based payments |  |  |  |  |  |  | € (766.2) |  | € (51.8) | € (13.4) |  |  |  |  |  |  |
Cash outflow to tax authority |  |  |  |  |  |  | 213.0 |  |  |  |  |  |  |  |  |  |
Liabilities from share-based payment arrangements |  |  |  |  |  |  | € 29.0 |  | € 36.2 |  |  |  |  |  |  |  |
Applicable wage taxes and social security contributions resulting from and withheld upon exercise |  |  |  |  |  |  |  |  |  |  |  |  | € 724.0 |  |  |  |
LTI Program |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Option rights vesting period (in years) |  |  |  |  |  |  |  |  | 4 years | 4 years | 4 years |  |  |  |  |  |
Weighted average share price (in euros per share) | € / shares |  |  |  |  |  |  | € 171.40 |  |  |  |  |  |  |  |  |  |
LTI-plus program |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Option rights vesting period (in years) |  |  |  |  |  |  |  |  | 2 years |  |  |  |  |  |  |  |
Share options outstanding (in shares) | shares |  |  |  |  |  |  | 0 |  | 0 | 372,011 |  |  |  |  |  |  |
BioNTech 2020 Restricted Stock Unit Plan For North America Employees |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Option rights vesting period (in years) |  |  |  |  |  |  |  |  |  |  | 4 years |  |  |  |  |  |
Cash outflow for share based payment exercise |  |  |  |  |  |  | € 10.0 |  | € 9.4 | € 10.1 |  |  |  |  |  |  |
Liabilities from share-based payment arrangements |  |  |  |  |  |  | € 14.4 |  | 13.4 |  |  |  |  |  |  |  |
BioNTech 2020 Restricted Stock Unit Plan For North America Employees | One year |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vesting percentage after one year (as a percent) |  |  |  |  |  |  |  |  |  |  | 25.00% |  |  |  |  |  |
Management Board Grant |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Option rights vesting period (in years) |  |  |  |  |  |  | 4 years | 4 years |  |  |  |  |  |  |  |  |
Liabilities from share-based payment arrangements |  |  |  |  |  |  | € 2.1 |  | € 2.3 |  |  |  |  |  |  |  |
Percentage of ADS to ordinary shares (as a percent) |  |  |  |  |  |  | 50.00% | 50.00% |  |  |  |  |  |  |  |  |
Option rights exercisable period (in years) |  |  |  |  | 10 years | 10 years | 4 years | 4 years |  |  |  |  |  |  |  |  |
Percentage of exercise price increase (as a percent) |  |  |  |  |  |  | 7.00% | 7.00% |  |  |  |  |  |  |  |  |
Threshold amount of dividend by number of shares outstanding immediately following initial public offering |  |  |  |  |  |  | € 8,500.0 |  |  |  |  |  |  |  |  |  |
Percentage of target share price applicable for prior twelve month period (as a percent) |  |  |  |  |  |  | 107.00% | 107.00% |  |  |  |  |  |  |  |  |
Reclassification for share-based payment arrangement |  |  | € 3.3 | € 1.1 |  |  |  |  |  |  |  |  |  |  |  |  |
Price of ADS as a percentage of exercise price, maximum (as a percent) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 800.00%
Maximum economic benefits of options exercised | $ |  |  |  |  |  |  |  | $ 246.24 |  |  |  |  |  |  |  |  |
Effective exercise price maximum (in dollars per share) | $ / shares |  |  |  |  |  |  |  | $ 30.78 |  |  |  |  |  |  |  |  |
Options outstanding, weighted-average expected life (in years) |  |  |  |  |  |  | 4 years 1 month 6 days | 4 years 1 month 6 days | 4 years |  |  |  |  |  |  |  |
Liability related to the phantom option awards |  |  |  |  |  |  | € 3.6 |  | € 5.6 |  |  |  |  |  |  |  |
Share options outstanding (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  |  |  | 86,118 | 6,463 | 45,279 | 248,096
Management Board Grant | Prof. Ugur Sahin, M.D. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum cash payment |  |  |  |  |  |  | 20.0 |  |  |  |  |  |  |  |  |  |
Management Board Grant | Sierk Poetting, Ph.D. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum cash payment |  |  |  |  |  |  | € 10.0 |  |  |  |  |  |  |  |  |  |
Chief Executive Officer Grant |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of exercise price increase (as a percent) |  |  |  |  | 7.00% | 7.00% |  |  |  |  |  |  |  |  |  |  |
Price of ADS as a percentage of exercise price, maximum (as a percent) |  |  |  |  | 800.00% | 800.00% |  |  |  |  |  |  |  |  |  |  |
Maximum economic benefits of options exercised | $ |  |  |  |  |  | $ 240.00 |  |  |  |  |  |  |  |  |  |  |
Effective exercise price maximum (in dollars per share) | $ / shares |  |  |  |  |  | $ 30.00 |  |  |  |  |  |  |  |  |  |  |
Options outstanding, weighted-average expected life (in years) |  |  |  |  |  |  | 1 year 1 month 6 days | 1 year 1 month 6 days | 2 years 1 month 6 days |  |  |  |  |  |  |  |
Chief Executive Officer Grant | Ordinary shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Option rights vesting period (in years) |  |  |  |  | 4 years | 4 years |  |  |  |  |  |  |  |  |  |  |
Option rights exercisable period (in years) |  |  |  |  | 4 years | 4 years |  |  |  |  |  |  |  |  |  |  |
Threshold amount of dividend by number of shares outstanding immediately following initial public offering |  |  |  |  | € 8,500.0 |  |  |  |  |  |  |  |  |  |  |  |
Percentage of target share price applicable for prior twelve month period (as a percent) |  |  |  |  | 107.00% | 107.00% |  |  |  |  |  |  |  |  |  |  |
Option to purchase ordinary shares (in shares) | shares |  |  |  |  | 4,374,963 | 4,374,963 |  |  |  |  |  |  |  |  |  |  |
Exercise price in translation for IPO (in dollar per share and euro per share) | (per share) |  |  |  |  | € 13.60 | $ 15.00 |  |  |  |  |  |  |  |  |  |  |
Chief Executive Officer Grant | Ordinary shares | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Option rights exercisable period (in years) |  |  |  |  | 10 years | 10 years |  |  |  |  |  |  |  |  |  |  |
Employee Stock Ownership Plan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of exercise price increase (as a percent) | 7.00% | 8.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Price of ADS as a percentage of exercise price, maximum (as a percent) |  | 800.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum economic benefits of options exercised | $ |  | $ 240 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Effective exercise price maximum (in dollars per share) | $ / shares |  | $ 30.00 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Options outstanding, weighted-average expected life (in years) |  |  |  |  |  |  | 9 months 18 days | 9 months 18 days | 1 year 8 months 12 days |  |  |  |  |  |  |  |
Number of share options exercisable in share-based payment arrangement (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  | 4,374,963 |  |  |  |  |
Minimum strike price (as a percent) | 28.00% | 32.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash-settled option rights, exercised (in shares) | shares |  |  |  |  |  |  | 39,785 | 39,785 | 583,383 |  |  |  |  |  |  |  |
Weighted average share price (in euros per share) | € / shares |  |  |  |  |  |  | € 96.49 |  | € 160.44 |  |  |  |  |  |  |  |
Share options outstanding (in shares) | shares |  |  |  |  |  |  | 17,799 |  | 57,584 | 642,007 |  |  |  |  |  |  |
Employee Stock Ownership Plan | Ordinary shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Option rights vesting period (in years) |  | 4 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Option rights exercisable period (in years) |  | 4 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash-Settled Share-Based Payment Arrangement | Employee Stock Option Plan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Liabilities from share-based payment arrangements |  |  |  |  |  |  | € 8.5 |  | € 14.5 |  |  |  |  |  |  |  |
Exercise price of phantom options granted (in euro per share) | € / shares |  |  |  |  |  |  |  |  | € 10.14 |  |  |  |  |  |  |  |
Cash-settled option rights, exercised (in shares) | shares |  |  |  |  |  |  | 52,100 | 52,100 | 289,168 |  |  |  |  |  |  |  |
Cash outflow |  |  |  |  |  |  | € 4.5 |  | € 42.2 |  |  |  |  |  |  |  |
Weighted average share price (in euros per share) | € / shares |  |  |  |  |  |  | € 96.25 |  | € 155.39 |  |  |  |  |  |  |  |
Share options outstanding (in shares) | shares |  |  |  |  |  |  | 109,651 |  |  |  |  |  |  |  |  |  |
Cash-settled related to rights vested and exercisable |  |  |  |  |  |  | € 8.3 |  | € 11.2 |  |  |  |  |  |  |  |

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