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Financial risk and capital management infraestructure (Details) - EUR (€)
€ in Millions
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
The value of assets liabilities non controlling interests and shareholders funds attributed to the parent company [Line Items]      
Assets € 28,999 € 26,318  
Liabilities 20,879 20,439  
Equity attributable to owners of parent 6,075 3,766 € 4,233
Non-controlling interests 2,045 2,113 € 2,240
Euro Member Countries, Euro      
The value of assets liabilities non controlling interests and shareholders funds attributed to the parent company [Line Items]      
Assets 8,145 7,957  
Liabilities 4,815 5,996  
Equity attributable to owners of parent 3,119 1,780  
Non-controlling interests 211 181  
United Kingdom, Pounds      
The value of assets liabilities non controlling interests and shareholders funds attributed to the parent company [Line Items]      
Assets 602 715  
Liabilities 382 477  
Equity attributable to owners of parent 219 237  
Non-controlling interests 1 1  
United States of America, Dollars      
The value of assets liabilities non controlling interests and shareholders funds attributed to the parent company [Line Items]      
Assets 15,561 13,399  
Liabilities 13,131 11,294  
Equity attributable to owners of parent 796 408  
Non-controlling interests 1,634 1,696  
Canada, Dollars      
The value of assets liabilities non controlling interests and shareholders funds attributed to the parent company [Line Items]      
Assets 882 976  
Liabilities 457 469  
Equity attributable to owners of parent 425 507  
Non-controlling interests 0 0  
Australia, Dollars      
The value of assets liabilities non controlling interests and shareholders funds attributed to the parent company [Line Items]      
Assets 289 269  
Liabilities 215 225  
Equity attributable to owners of parent 74 44  
Non-controlling interests 0 0  
Poland, Zlotych      
The value of assets liabilities non controlling interests and shareholders funds attributed to the parent company [Line Items]      
Assets 1,918 2,011  
Liabilities 1,576 1,613  
Equity attributable to owners of parent 144 164  
Non-controlling interests 199 234  
Chile, Pesos      
The value of assets liabilities non controlling interests and shareholders funds attributed to the parent company [Line Items]      
Assets 251 301  
Liabilities 132 191  
Equity attributable to owners of parent 120 110  
Non-controlling interests 0 0  
Colombia, Pesos      
The value of assets liabilities non controlling interests and shareholders funds attributed to the parent company [Line Items]      
Assets 233 230  
Liabilities 133 142  
Equity attributable to owners of parent 100 89  
Non-controlling interests 0 0  
India, Rupees      
The value of assets liabilities non controlling interests and shareholders funds attributed to the parent company [Line Items]      
Assets 1,026 380  
Liabilities 3 4  
Equity attributable to owners of parent 1,023 376  
Non-controlling interests 0 0  
Other Currency [Member]      
The value of assets liabilities non controlling interests and shareholders funds attributed to the parent company [Line Items]      
Assets 91 81  
Liabilities 36 28  
Equity attributable to owners of parent 56 52  
Non-controlling interests € 0 € 1