Accounts receivable - Summary of Gross Value of Overdue Receivables (Details) - EUR (€) € in Millions |
Jun. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Disclosure of Financial Assets that are Either Past Due or Impaired [Line Items] | ||
| Overdue receivables gross value | € 522 | € 468 |
| Overdue by less than 1 month | ||
| Disclosure of Financial Assets that are Either Past Due or Impaired [Line Items] | ||
| Overdue receivables gross value | 183 | 184 |
| Overdue by 1-3 months | ||
| Disclosure of Financial Assets that are Either Past Due or Impaired [Line Items] | ||
| Overdue receivables gross value | 127 | 134 |
| Overdue by 3-6 months | ||
| Disclosure of Financial Assets that are Either Past Due or Impaired [Line Items] | ||
| Overdue receivables gross value | 142 | 71 |
| Overdue by 6-12 months | ||
| Disclosure of Financial Assets that are Either Past Due or Impaired [Line Items] | ||
| Overdue receivables gross value | 27 | 27 |
| Overdue by > 12 months | ||
| Disclosure of Financial Assets that are Either Past Due or Impaired [Line Items] | ||
| Overdue receivables gross value | € 43 | € 52 |