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Issued Capital and Reserves - Additional Information (Details) € / shares in Units, € in Millions, $ in Billions | 1 Months Ended | 3 Months Ended | 4 Months Ended | 5 Months Ended | 12 Months Ended |
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Mar. 31, 2023 EUR (€) | Jun. 30, 2022 EUR (€) € / shares | Mar. 31, 2022 EUR (€) shares | Mar. 31, 2022 USD ($) shares | Feb. 28, 2022 EUR (€) | Jan. 31, 2022 EUR (€) shares | Mar. 17, 2023 USD ($) | Mar. 22, 2023 EUR (€) | Oct. 10, 2022 USD ($) | Dec. 31, 2023 EUR (€) shares | Dec. 31, 2022 EUR (€) shares | Dec. 31, 2021 EUR (€) | Mar. 24, 2022 EUR (€) shares
Disclosure of reserves within equity [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares outstanding (in shares) | shares |  |  |  |  |  |  |  |  |  | 237,725,735 | 243,215,169 |  |
Treasury shares (in shares) | shares |  |  |  |  |  |  |  |  |  | 10,826,465 | 5,337,031 |  |
Share repurchase program authorized amount | € 500.0 |  |  | $ 1.5 |  |  |  |  |  |  |  |  |
Shares issued (in shares) | shares |  |  | 1,744,392 | 1,744,392 |  |  |  |  |  |  |  |  |
Issueance of share capital |  |  |  |  |  |  |  |  |  |  | € 67.6 |  |
Share capital |  |  |  |  |  |  |  |  |  | € 248.6 | 248.6 |  |
Proposed dividends per share (in euros per share) | € / shares |  | € 2.00 |  |  |  |  |  |  |  |  |  |  |
Dividends paid, classified as financing activities |  | € 484.3 |  |  |  |  |  |  |  | € 0.0 | 484.3 | € 0.0 |
Share Repurchase Program, Tranche One |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of reserves within equity [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Share repurchase program authorized amount |  |  |  |  |  |  |  | € 1,000.0 | $ 1.0 |  |  |  |
Share Repurchase Program, Tranche Two |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of reserves within equity [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Share repurchase program authorized amount |  |  |  |  |  |  | $ 0.5 | € 500.0 |  |  |  |  |
Announcement Of Research, Development And Commercialization Collaboration Agreement |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of reserves within equity [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Shares issued (in shares) | shares |  |  |  |  |  |  |  |  |  |  |  |  | 497,727
Share capital |  |  |  |  | € 0.5 |  |  |  |  |  |  |  | € 0.5
Share capital |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of reserves within equity [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Issueance of share capital |  |  | € 1.8 |  |  |  |  |  |  |  | 0.5 |  |
Capital reserve |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of reserves within equity [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Issueance of share capital |  |  | € 233.2 |  | € 67.1 |  |  |  |  |  | 67.1 |  |
Pfizer Inc. |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of reserves within equity [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Shares issued (in shares) | shares |  |  |  |  |  | 497,727 |  |  |  |  |  |  |
Pfizer Inc. | Share capital |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of reserves within equity [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Issueance of share capital |  |  |  |  |  | € 110.6 |  |  |  |  |  |  |
Fair value measurement derivative |  |  |  |  |  |  |  |  |  |  | € 43.0 |  |

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