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Note 18 Changes in other intangible assets (Details) - EUR (€)
€ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Other intangible assets [Line Items]      
Other intangible assets € 1,435 € 2,010  
Other intangible assets 1,379 1,435 € 2,010
Computer software [member]      
Other intangible assets [Line Items]      
Other intangible assets 1,202 1,598 1,605
Additions other than through business combinations, intangible assets other than goodwill 470 452 525
Amortisation, intangible assets other than goodwill (446) (448) (447)
Amortization transfer to discontinued operations [1] 0 (77) (106)
Increase (decrease) through net exchange differences, intangible assets and goodwill 29 (38) 32
Impairment (15) (6) (11)
Decreases by companies held for sale other intangible assets [1] 0 (279) 0
Other intangible assets 1,239 1,202 1,598
Other intangible assets [member]      
Other intangible assets [Line Items]      
Other intangible assets 233 412 529
Additions other than through business combinations, intangible assets other than goodwill 0 8 8
Amortisation, intangible assets other than goodwill (48) (59) (63)
Amortization transfer to discontinued operations [1] 0 (3) (4)
Increase (decrease) through net exchange differences, intangible assets and goodwill (45) (91) (58)
Impairment 0 0 (1)
Decreases by companies held for sale other intangible assets [1] 0 (34) 0
Other intangible assets 140 233 412
Total of intangible assets [Member]      
Other intangible assets [Line Items]      
Other intangible assets 1,435 2,010 2,134
Additions other than through business combinations, intangible assets other than goodwill 470 460 533
Amortisation, intangible assets other than goodwill (494) (507) (510)
Amortization transfer to discontinued operations [1] 0 (80) (110)
Increase (decrease) through net exchange differences, intangible assets and goodwill (16) (129) (25)
Impairment (15) (6) (12)
Decreases by companies held for sale other intangible assets [1] 0 (313) 0
Other intangible assets € 1,379 € 1,435 € 2,010
[1] (*) Amount is mainly due to the companies in the United States included in the USA Sale (see Notes 1.3, 3 and 21).