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Trade and other receivables - Valuation allowance for doubtful accounts (Details) - Trade and other receivables - Accumulated impairment - EUR (€)
€ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Trade and other receivables    
Financial assets at beginning of period € 3,246 € 3,150
Deductions (357) (603)
Other changes (75) 79
Financial assets at end of period 3,157 3,246
Performing receivables    
Trade and other receivables    
Additions 112 95
Deductions (82) (119)
Defaulted receivables    
Trade and other receivables    
Additions 231 525
Deductions € (275) € (484)