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Accounts receivable - Summary of Gross Value of Overdue Receivables (Details) - EUR (€) € in Millions | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
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Disclosure of financial assets that are either past due or impaired [line items] |  |  |
Overdue receivables gross value | € 650 | € 689 | € 452
Less than 1 month |  |  |
Disclosure of financial assets that are either past due or impaired [line items] |  |  |
Overdue receivables gross value | 316 | 269 | 118
Overdue by 1 to 3 months |  |  |
Disclosure of financial assets that are either past due or impaired [line items] |  |  |
Overdue receivables gross value | 194 | 154 | 161
Overdue by 3 to 6 months |  |  |
Disclosure of financial assets that are either past due or impaired [line items] |  |  |
Overdue receivables gross value | 87 | 123 | 87
Overdue by 6 to 12 months |  |  |
Disclosure of financial assets that are either past due or impaired [line items] |  |  |
Overdue receivables gross value | 9 | 62 | 35
Later than 12 months |  |  |
Disclosure of financial assets that are either past due or impaired [line items] |  |  |
Overdue receivables gross value | € 44 | € 81 | € 51

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