Investments accounted for using the equity method - Summary of Principal Transactions and Balances with Related Parties (Details) - EUR (€) € in Millions |
6 Months Ended | |||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Dec. 31, 2025 |
Oct. 31, 2024 |
|
| EUROAPI | ||||
| Disclosure of transactions between related parties [line items] | ||||
| Subordinate hybrid bond, related party transactions | € 200 | |||
| Associates and joint ventures | ||||
| Disclosure of transactions between related parties [line items] | ||||
| Sales | € 31 | € 29 | ||
| Royalties and other income | 142 | 63 | ||
| Purchases of goods and services (including research expenses) | 548 | € 371 | ||
| Accounts receivable and other receivables | 430 | € 588 | ||
| Other assets | 84 | 143 | ||
| Other liabilities | 379 | 710 | ||
| Associates and joint ventures | EUROAPI | ||||
| Disclosure of transactions between related parties [line items] | ||||
| Other assets | € 84 | € 143 | ||