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Note 18 Reconciliation Of Changes In Goodwill (Details) - EUR (€)
€ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disclosure of reconciliation of changes in goodwill [line items]      
Goodwill at beginning of period € 910 € 4,955 € 6,180
Additional recognition, goodwill 0 0 0
Increase (decrease) through net exchange differences, goodwill (88) (208) 93
Impairment loss recognised in profit or loss, goodwill (4) (2,097) (1,318)
Increase Decrease Through Companies In The Process Of Sale Goodwill 0 (1,740)  
Increase (decrease) through transfers and other changes, intangible assets and goodwill 0 0 0
Goodwill at end of period 818 910 4,955
UNITED STATES      
Disclosure of reconciliation of changes in goodwill [line items]      
Goodwill at beginning of period [1] 0 3,846 5,066
Additional recognition, goodwill [1] 0 0 0
Increase (decrease) through net exchange differences, goodwill [1] 0 (22) 98
Impairment loss recognised in profit or loss, goodwill [1] 0 (2,084) (1,318)
Increase Decrease Through Companies In The Process Of Sale Goodwill [1] 0 (1,740)  
Increase (decrease) through transfers and other changes, intangible assets and goodwill [1] 0 0 0
Goodwill at end of period [1] 0 0 3,846
MEXICO      
Disclosure of reconciliation of changes in goodwill [line items]      
Goodwill at beginning of period 478 550 519
Additional recognition, goodwill 0 0 0
Increase (decrease) through net exchange differences, goodwill 26 (72) 31
Impairment loss recognised in profit or loss, goodwill 0 0 0
Increase Decrease Through Companies In The Process Of Sale Goodwill 0 0  
Increase (decrease) through transfers and other changes, intangible assets and goodwill 0 0 0
Goodwill at end of period 504 478 550
TURKEY      
Disclosure of reconciliation of changes in goodwill [line items]      
Goodwill at beginning of period 254 346 382
Additional recognition, goodwill 0 0 0
Increase (decrease) through net exchange differences, goodwill (102) (92) (36)
Impairment loss recognised in profit or loss, goodwill 0 0 0
Increase Decrease Through Companies In The Process Of Sale Goodwill 0 0  
Increase (decrease) through transfers and other changes, intangible assets and goodwill 0 0 0
Goodwill at end of period 152 254 346
COLOMBIA      
Disclosure of reconciliation of changes in goodwill [line items]      
Goodwill at beginning of period 143 164 161
Additional recognition, goodwill 0 0 0
Increase (decrease) through net exchange differences, goodwill (9) (21) 3
Impairment loss recognised in profit or loss, goodwill 0 0 0
Increase Decrease Through Companies In The Process Of Sale Goodwill 0 0  
Increase (decrease) through transfers and other changes, intangible assets and goodwill 0 0 0
Goodwill at end of period 134 143 164
CHILE      
Disclosure of reconciliation of changes in goodwill [line items]      
Goodwill at beginning of period 27 27 29
Additional recognition, goodwill 0 0 0
Increase (decrease) through net exchange differences, goodwill (3) 0 (2)
Impairment loss recognised in profit or loss, goodwill 0 0 0
Increase Decrease Through Companies In The Process Of Sale Goodwill 0 0  
Increase (decrease) through transfers and other changes, intangible assets and goodwill 0 0 0
Goodwill at end of period 24 27 27
Other Countries [Member]      
Disclosure of reconciliation of changes in goodwill [line items]      
Goodwill at beginning of period 8 22 23
Additional recognition, goodwill 0 0 0
Increase (decrease) through net exchange differences, goodwill 0 (1) (1)
Impairment loss recognised in profit or loss, goodwill (4) (13) 0
Increase Decrease Through Companies In The Process Of Sale Goodwill 0 0  
Increase (decrease) through transfers and other changes, intangible assets and goodwill 0 0 0
Goodwill at end of period € 4 € 8 € 22
[1] (*) Since the USA sale agreement, the United States is no longer considered a CGU (see Note 3).