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Note 20 Non current assets and disposal groups classified as held for sale breakdown by items (Details) - EUR (€)
€ in Millions
Jun. 30, 2023
Dec. 31, 2022
Non current assets and disposal groups classified as held for sale breakdown by items [Line Items]    
Non-current assets or disposal groups classified as held for sale € (966) € (1,022)
Liabilities included in disposal groups classified as held for sale 0 0
Foreclosures and recoveries [Member]    
Non current assets and disposal groups classified as held for sale breakdown by items [Line Items]    
Non-current assets or disposal groups classified as held for sale (993) (1,070)
Other assets from tangible assets [Member]    
Non current assets and disposal groups classified as held for sale breakdown by items [Line Items]    
Non-current assets or disposal groups classified as held for sale (1,037) (1,063)
Companies held for sale [Member]    
Non current assets and disposal groups classified as held for sale breakdown by items [Line Items]    
Non-current assets or disposal groups classified as held for sale (46) (40)
Liabilities included in disposal groups classified as held for sale 0 0
Other assets classified as held for sale [Member]    
Non current assets and disposal groups classified as held for sale breakdown by items [Line Items]    
Non-current assets or disposal groups classified as held for sale 0 0
Accrued amortization [Member]    
Non current assets and disposal groups classified as held for sale breakdown by items [Line Items]    
Non-current assets or disposal groups classified as held for sale (89) (93)
Impairment losses [Member]    
Non current assets and disposal groups classified as held for sale breakdown by items [Line Items]    
Non-current assets or disposal groups classified as held for sale € (1,020) € (1,057)