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Financial assets held for trading (Details) - EUR (€)
€ in Millions
Dec. 31, 2020
Dec. 31, 2019
Financial assets held for trading    
Financial assets held for trading € 5,502 € 6,760
Quoted bonds issued by sovereign state    
Financial assets held for trading    
Financial assets held for trading 1,223 1,462
Other    
Financial assets held for trading    
Financial assets held for trading € 4,279 € 5,298