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Note 18 Other Intangible Assets (Details) - EUR (€)
€ in Millions
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Other intangible assets [Line Items]      
Other intangible assets € 1,379 € 1,435 € 2,010
Computer software [member]      
Other intangible assets [Line Items]      
Other intangible assets 1,239 1,202 1,598
Intangible Assets With Indefinite Useful Life      
Other intangible assets [Line Items]      
Other intangible assets 12 12 11
Intangible assets with definite useful life [Member]      
Other intangible assets [Line Items]      
Other intangible assets € 128 € 221 € 401