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Accounts receivable - Summary of Accounts Receivable (Details) - EUR (€) € in Millions | Jun. 30, 2026 | Dec. 31, 2025
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Disclosure of Accounts Receivable [Line Items] |  |
Accounts receivable | € 8,714 | € 8,410
Gross value |  |
Disclosure of Accounts Receivable [Line Items] |  |
Accounts receivable | 8,818 | 8,510
Allowances |  |
Disclosure of Accounts Receivable [Line Items] |  |
Accounts receivable | € 104 | € 100

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