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Provisions for employee benefits (Details) - EUR (€)
€ in Millions
Dec. 31, 2020
Dec. 31, 2019
Statement    
Provisions for employee benefits € 1,201 € 1,136
Other benefit plans    
Statement    
Provisions for employee benefits 268 278
Defined benefit plan    
Statement    
Provisions for employee benefits 933 858
Italian defined benefit plans    
Statement    
Provisions for employee benefits 258 269
Foreign defined benefit plan    
Statement    
Provisions for employee benefits 493 412
FISDE and other foreign medical plans    
Statement    
Provisions for employee benefits € 182 € 177