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Debt, cash and cash equivalents and lease liabilities - Summary of Debt by Interest Rate (Details) - EUR (€) € in Millions | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | [1]
Disclosure of financial instruments by type of interest rate [line items] |  |  |  |  |  |  |
Cash and cash equivalents |  | € (7,441) | € (8,710) | [1] | € (12,736) | [1] | € (10,098)
Net debt | [2] | 8,772 | € 7,793 |  | € 6,437 |  |
Value on redemption before derivative instruments |  |  |  |  |  |  |
Disclosure of financial instruments by type of interest rate [line items] |  |  |  |  |  |  |
Debt |  | € 16,158 |  |  |  |  |
Debt, percent |  | 100.00% |  |  |  |  |
Net debt |  | € 8,717 |  |  |  |  |
Value on redemption before derivative instruments | Fixed-rate debt |  |  |  |  |  |  |
Disclosure of financial instruments by type of interest rate [line items] |  |  |  |  |  |  |
Debt |  | € 14,592 |  |  |  |  |
Debt, percent |  | 90.00% |  |  |  |  |
Value on redemption before derivative instruments | Floating-rate debt |  |  |  |  |  |  |
Disclosure of financial instruments by type of interest rate [line items] |  |  |  |  |  |  |
Debt |  | € 1,566 |  |  |  |  |
Debt, percent |  | 10.00% |  |  |  |  |
Cash and cash equivalents |  | € (7,441) |  |  |  |  |
Value on redemption after derivative instruments |  |  |  |  |  |  |
Disclosure of financial instruments by type of interest rate [line items] |  |  |  |  |  |  |
Debt |  | 16,171 |  |  |  |  |
Debt, percent |  |  | 100.00% |  | 100.00% |  |
Cash and cash equivalents |  | (7,365) | € (8,738) |  | € (12,781) |  |
Net debt |  | 8,806 | € 7,835 |  | € 6,492 |  |
Value on redemption after derivative instruments | Fixed-rate debt |  |  |  |  |  |  |
Disclosure of financial instruments by type of interest rate [line items] |  |  |  |  |  |  |
Debt |  | € 11,098 |  |  |  |  |
Debt, percent |  | 69.00% | 69.00% |  | 85.00% |  |
Value on redemption after derivative instruments | Floating-rate debt |  |  |  |  |  |  |
Disclosure of financial instruments by type of interest rate [line items] |  |  |  |  |  |  |
Debt |  | € 5,074 |  |  |  |  |
Debt, percent |  | 31.00% | 31.00% |  | 15.00% |  |
Year 1 | Value on redemption before derivative instruments |  |  |  |  |  |  |
Disclosure of financial instruments by type of interest rate [line items] |  |  |  |  |  |  |
Debt |  | € 4,218 |  |  |  |  |
Net debt |  | (3,223) |  |  |  |  |
Year 1 | Value on redemption before derivative instruments | Fixed-rate debt |  |  |  |  |  |  |
Disclosure of financial instruments by type of interest rate [line items] |  |  |  |  |  |  |
Debt |  | 2,716 |  |  |  |  |
Year 1 | Value on redemption before derivative instruments | Floating-rate debt |  |  |  |  |  |  |
Disclosure of financial instruments by type of interest rate [line items] |  |  |  |  |  |  |
Debt |  | 1,502 |  |  |  |  |
Cash and cash equivalents |  | (7,441) |  |  |  |  |
Year 1 | Value on redemption after derivative instruments |  |  |  |  |  |  |
Disclosure of financial instruments by type of interest rate [line items] |  |  |  |  |  |  |
Debt |  | 4,231 |  |  |  |  |
Net debt |  | (3,134) |  |  |  |  |
Year 1 | Value on redemption after derivative instruments | Fixed-rate debt |  |  |  |  |  |  |
Disclosure of financial instruments by type of interest rate [line items] |  |  |  |  |  |  |
Debt |  | (778) |  |  |  |  |
Year 1 | Value on redemption after derivative instruments | Floating-rate debt |  |  |  |  |  |  |
Disclosure of financial instruments by type of interest rate [line items] |  |  |  |  |  |  |
Debt |  | 5,010 |  |  |  |  |
Cash and cash equivalents |  | (7,365) |  |  |  |  |
Year 2 | Value on redemption before derivative instruments |  |  |  |  |  |  |
Disclosure of financial instruments by type of interest rate [line items] |  |  |  |  |  |  |
Debt |  | 3,042 |  |  |  |  |
Net debt |  | 3,042 |  |  |  |  |
Year 2 | Value on redemption before derivative instruments | Fixed-rate debt |  |  |  |  |  |  |
Disclosure of financial instruments by type of interest rate [line items] |  |  |  |  |  |  |
Debt |  | 3,010 |  |  |  |  |
Year 2 | Value on redemption before derivative instruments | Floating-rate debt |  |  |  |  |  |  |
Disclosure of financial instruments by type of interest rate [line items] |  |  |  |  |  |  |
Debt |  | 32 |  |  |  |  |
Cash and cash equivalents |  | 0 |  |  |  |  |
Year 2 | Value on redemption after derivative instruments |  |  |  |  |  |  |
Disclosure of financial instruments by type of interest rate [line items] |  |  |  |  |  |  |
Debt |  | 3,042 |  |  |  |  |
Net debt |  | 3,042 |  |  |  |  |
Year 2 | Value on redemption after derivative instruments | Fixed-rate debt |  |  |  |  |  |  |
Disclosure of financial instruments by type of interest rate [line items] |  |  |  |  |  |  |
Debt |  | 3,010 |  |  |  |  |
Year 2 | Value on redemption after derivative instruments | Floating-rate debt |  |  |  |  |  |  |
Disclosure of financial instruments by type of interest rate [line items] |  |  |  |  |  |  |
Debt |  | 32 |  |  |  |  |
Cash and cash equivalents |  | 0 |  |  |  |  |
Year 3 | Value on redemption before derivative instruments |  |  |  |  |  |  |
Disclosure of financial instruments by type of interest rate [line items] |  |  |  |  |  |  |
Debt |  | 1,151 |  |  |  |  |
Net debt |  | 1,151 |  |  |  |  |
Year 3 | Value on redemption before derivative instruments | Fixed-rate debt |  |  |  |  |  |  |
Disclosure of financial instruments by type of interest rate [line items] |  |  |  |  |  |  |
Debt |  | 1,150 |  |  |  |  |
Year 3 | Value on redemption before derivative instruments | Floating-rate debt |  |  |  |  |  |  |
Disclosure of financial instruments by type of interest rate [line items] |  |  |  |  |  |  |
Debt |  | 1 |  |  |  |  |
Cash and cash equivalents |  | 0 |  |  |  |  |
Year 3 | Value on redemption after derivative instruments |  |  |  |  |  |  |
Disclosure of financial instruments by type of interest rate [line items] |  |  |  |  |  |  |
Debt |  | 1,151 |  |  |  |  |
Net debt |  | 1,151 |  |  |  |  |
Year 3 | Value on redemption after derivative instruments | Fixed-rate debt |  |  |  |  |  |  |
Disclosure of financial instruments by type of interest rate [line items] |  |  |  |  |  |  |
Debt |  | 1,150 |  |  |  |  |
Year 3 | Value on redemption after derivative instruments | Floating-rate debt |  |  |  |  |  |  |
Disclosure of financial instruments by type of interest rate [line items] |  |  |  |  |  |  |
Debt |  | 1 |  |  |  |  |
Cash and cash equivalents |  | 0 |  |  |  |  |
Year 4 | Value on redemption before derivative instruments |  |  |  |  |  |  |
Disclosure of financial instruments by type of interest rate [line items] |  |  |  |  |  |  |
Debt |  | 1,667 |  |  |  |  |
Net debt |  | 1,667 |  |  |  |  |
Year 4 | Value on redemption before derivative instruments | Fixed-rate debt |  |  |  |  |  |  |
Disclosure of financial instruments by type of interest rate [line items] |  |  |  |  |  |  |
Debt |  | 1,666 |  |  |  |  |
Year 4 | Value on redemption before derivative instruments | Floating-rate debt |  |  |  |  |  |  |
Disclosure of financial instruments by type of interest rate [line items] |  |  |  |  |  |  |
Debt |  | 1 |  |  |  |  |
Cash and cash equivalents |  | 0 |  |  |  |  |
Year 4 | Value on redemption after derivative instruments |  |  |  |  |  |  |
Disclosure of financial instruments by type of interest rate [line items] |  |  |  |  |  |  |
Debt |  | 1,667 |  |  |  |  |
Net debt |  | 1,667 |  |  |  |  |
Year 4 | Value on redemption after derivative instruments | Fixed-rate debt |  |  |  |  |  |  |
Disclosure of financial instruments by type of interest rate [line items] |  |  |  |  |  |  |
Debt |  | 1,666 |  |  |  |  |
Year 4 | Value on redemption after derivative instruments | Floating-rate debt |  |  |  |  |  |  |
Disclosure of financial instruments by type of interest rate [line items] |  |  |  |  |  |  |
Debt |  | 1 |  |  |  |  |
Cash and cash equivalents |  | 0 |  |  |  |  |
Year 5 | Value on redemption before derivative instruments |  |  |  |  |  |  |
Disclosure of financial instruments by type of interest rate [line items] |  |  |  |  |  |  |
Debt |  | 1,301 |  |  |  |  |
Net debt |  | 1,301 |  |  |  |  |
Year 5 | Value on redemption before derivative instruments | Fixed-rate debt |  |  |  |  |  |  |
Disclosure of financial instruments by type of interest rate [line items] |  |  |  |  |  |  |
Debt |  | 1,300 |  |  |  |  |
Year 5 | Value on redemption before derivative instruments | Floating-rate debt |  |  |  |  |  |  |
Disclosure of financial instruments by type of interest rate [line items] |  |  |  |  |  |  |
Debt |  | 1 |  |  |  |  |
Cash and cash equivalents |  | 0 |  |  |  |  |
Year 5 | Value on redemption after derivative instruments |  |  |  |  |  |  |
Disclosure of financial instruments by type of interest rate [line items] |  |  |  |  |  |  |
Debt |  | 1,301 |  |  |  |  |
Net debt |  | 1,301 |  |  |  |  |
Year 5 | Value on redemption after derivative instruments | Fixed-rate debt |  |  |  |  |  |  |
Disclosure of financial instruments by type of interest rate [line items] |  |  |  |  |  |  |
Debt |  | 1,300 |  |  |  |  |
Year 5 | Value on redemption after derivative instruments | Floating-rate debt |  |  |  |  |  |  |
Disclosure of financial instruments by type of interest rate [line items] |  |  |  |  |  |  |
Debt |  | 1 |  |  |  |  |
Cash and cash equivalents |  | 0 |  |  |  |  |
Year 5 and later | Value on redemption before derivative instruments |  |  |  |  |  |  |
Disclosure of financial instruments by type of interest rate [line items] |  |  |  |  |  |  |
Debt |  | 4,779 |  |  |  |  |
Net debt |  | 4,779 |  |  |  |  |
Year 5 and later | Value on redemption before derivative instruments | Fixed-rate debt |  |  |  |  |  |  |
Disclosure of financial instruments by type of interest rate [line items] |  |  |  |  |  |  |
Debt |  | 4,750 |  |  |  |  |
Year 5 and later | Value on redemption before derivative instruments | Floating-rate debt |  |  |  |  |  |  |
Disclosure of financial instruments by type of interest rate [line items] |  |  |  |  |  |  |
Debt |  | 29 |  |  |  |  |
Cash and cash equivalents |  | 0 |  |  |  |  |
Year 5 and later | Value on redemption after derivative instruments |  |  |  |  |  |  |
Disclosure of financial instruments by type of interest rate [line items] |  |  |  |  |  |  |
Debt |  | 4,779 |  |  |  |  |
Net debt |  | 4,779 |  |  |  |  |
Year 5 and later | Value on redemption after derivative instruments | Fixed-rate debt |  |  |  |  |  |  |
Disclosure of financial instruments by type of interest rate [line items] |  |  |  |  |  |  |
Debt |  | 4,750 |  |  |  |  |
Year 5 and later | Value on redemption after derivative instruments | Floating-rate debt |  |  |  |  |  |  |
Disclosure of financial instruments by type of interest rate [line items] |  |  |  |  |  |  |
Debt |  | 29 |  |  |  |  |
Cash and cash equivalents |  | 0 |  |  |  |  |
Euro | Value on redemption before derivative instruments |  |  |  |  |  |  |
Disclosure of financial instruments by type of interest rate [line items] |  |  |  |  |  |  |
Net debt |  | 10,681 |  |  |  |  |
Euro | Value on redemption before derivative instruments | Fixed-rate debt |  |  |  |  |  |  |
Disclosure of financial instruments by type of interest rate [line items] |  |  |  |  |  |  |
Debt |  | 13,626 |  |  |  |  |
Euro | Value on redemption before derivative instruments | Floating-rate debt |  |  |  |  |  |  |
Disclosure of financial instruments by type of interest rate [line items] |  |  |  |  |  |  |
Debt |  | 0 |  |  |  |  |
Cash and cash equivalents |  | (2,945) |  |  |  |  |
Euro | Value on redemption after derivative instruments |  |  |  |  |  |  |
Disclosure of financial instruments by type of interest rate [line items] |  |  |  |  |  |  |
Net debt |  | 7,285 | € 6,852 |  | € 10,489 |  |
Euro | Value on redemption after derivative instruments | Fixed-rate debt |  |  |  |  |  |  |
Disclosure of financial instruments by type of interest rate [line items] |  |  |  |  |  |  |
Debt |  | 11,098 |  |  |  |  |
Euro | Value on redemption after derivative instruments | Floating-rate debt |  |  |  |  |  |  |
Disclosure of financial instruments by type of interest rate [line items] |  |  |  |  |  |  |
Debt |  | 174 |  |  |  |  |
Cash and cash equivalents |  | (3,987) |  |  |  |  |
US dollar | Value on redemption before derivative instruments |  |  |  |  |  |  |
Disclosure of financial instruments by type of interest rate [line items] |  |  |  |  |  |  |
Net debt |  | (2,017) |  |  |  |  |
US dollar | Value on redemption before derivative instruments | Fixed-rate debt |  |  |  |  |  |  |
Disclosure of financial instruments by type of interest rate [line items] |  |  |  |  |  |  |
Debt |  | 966 |  |  |  |  |
US dollar | Value on redemption before derivative instruments | Floating-rate debt |  |  |  |  |  |  |
Disclosure of financial instruments by type of interest rate [line items] |  |  |  |  |  |  |
Debt |  | 1,221 |  |  |  |  |
Cash and cash equivalents |  | (4,204) |  |  |  |  |
US dollar | Value on redemption after derivative instruments |  |  |  |  |  |  |
Disclosure of financial instruments by type of interest rate [line items] |  |  |  |  |  |  |
Net debt |  | 2,502 | € 1,169 |  | € (2,404) |  |
US dollar | Value on redemption after derivative instruments | Fixed-rate debt |  |  |  |  |  |  |
Disclosure of financial instruments by type of interest rate [line items] |  |  |  |  |  |  |
Debt |  | 0 |  |  |  |  |
US dollar | Value on redemption after derivative instruments | Floating-rate debt |  |  |  |  |  |  |
Disclosure of financial instruments by type of interest rate [line items] |  |  |  |  |  |  |
Debt |  | 3,507 |  |  |  |  |
Cash and cash equivalents |  | (1,005) |  |  |  |  |
Singapore dollar | Value on redemption before derivative instruments |  |  |  |  |  |  |
Disclosure of financial instruments by type of interest rate [line items] |  |  |  |  |  |  |
Net debt |  | (3) |  |  |  |  |
Singapore dollar | Value on redemption after derivative instruments |  |  |  |  |  |  |
Disclosure of financial instruments by type of interest rate [line items] |  |  |  |  |  |  |
Net debt |  | (822) |  |  |  |  |
Singapore dollar | Value on redemption after derivative instruments | Floating-rate debt |  |  |  |  |  |  |
Disclosure of financial instruments by type of interest rate [line items] |  |  |  |  |  |  |
Cash and cash equivalents |  | € (822) |  |  |  |  |
[1] | Cash flows of the Opella business are presented separately in accordance with IFRS 5 (Non-Current Assets Held for Sale and Discontinued Operations).
[2] | (a)Net debt does not include lease liabilities, which amounted to €1,906 million as of December 31, 2024, €2,030 million as of December 31, 2023, and €2,181 million as of December 31, 2022 (see the maturity analysis at Note D.17.2.)

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