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Operating income by geographic (Details) - EUR (€) | 1 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2024 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Disclosure of detailed information about revenue by geographic area [Line Items] |  |  |  |
Revenue | € 9,147,000,000 | € 9,147,000,000 | € 8,514,000,000 | € 7,551,000,000
Increase decrease in revenue by geographic area |  | 633,000,000 | 963,000,000 |
UNITED STATES |  |  |  |
Disclosure of detailed information about revenue by geographic area [Line Items] |  |  |  |
Revenue |  | 3,271,000,000 | 2,879,000,000 | 2,906,000,000
Increase decrease in revenue by geographic area |  | 392,000,000 | (27,000,000) |
POLAND |  |  |  |
Disclosure of detailed information about revenue by geographic area [Line Items] |  |  |  |
Revenue |  | 2,119,000,000 | 2,160,000,000 | 1,842,000,000
Increase decrease in revenue by geographic area |  | (41,000,000) | 318,000,000 |
SPAIN |  |  |  |
Disclosure of detailed information about revenue by geographic area [Line Items] |  |  |  |
Revenue |  | 1,582,000,000 | 1,475,000,000 | 1,154,000,000
Increase decrease in revenue by geographic area |  | 107,000,000 | 321,000,000 |
UNITED KINGDOM |  |  |  |
Disclosure of detailed information about revenue by geographic area [Line Items] |  |  |  |
Revenue |  | 809,000,000 | 771,000,000 | 708,000,000
Increase decrease in revenue by geographic area |  | 38,000,000 | 63,000,000 |
CANADA |  |  |  |
Disclosure of detailed information about revenue by geographic area [Line Items] |  |  |  |
Revenue |  | 246,000,000 | 161,000,000 | 100,000,000
Increase decrease in revenue by geographic area |  | 85,000,000 | 61,000,000 |
Other countries [Member] |  |  |  |
Disclosure of detailed information about revenue by geographic area [Line Items] |  |  |  |
Revenue |  | 1,120,000,000 | 1,068,000,000 | € 841,000,000
Increase decrease in revenue by geographic area |  | € 52,000,000 | € 227,000,000 |

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