XML 253 R142.htm IDEA: XBRL DOCUMENT v3.21.1
Provisions for employee benefits - Actuarial assumptions used in the measurement of the liabilities (Details)
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Other benefit plans    
Statement    
Rate of price inflation 0.80% 0.70%
Other benefit plans | Minimum    
Statement    
Discount rate 0.00% 0.00%
Other benefit plans | Maximum    
Statement    
Discount rate 0.30% 0.70%
Italian defined benefit plans    
Statement    
Discount rate 0.30% 0.70%
Rate of compensation increase 1.80% 1.70%
Rate of price inflation 0.80% 0.70%
Foreign defined benefit plan | Minimum    
Statement    
Discount rate 0.10% 0.00%
Rate of compensation increase 1.30% 1.30%
Rate of price inflation 0.80% 0.80%
Life expectations on retirement at age 65 13 years 13 years
Foreign defined benefit plan | Maximum    
Statement    
Discount rate 14.70% 13.70%
Rate of compensation increase 12.50% 12.50%
Rate of price inflation 12.20% 11.30%
Life expectations on retirement at age 65 26 years 25 years
FISDE and other foreign medical plans    
Statement    
Discount rate 0.30% 0.70%
Rate of price inflation 0.80% 0.70%
Life expectations on retirement at age 65 24 years 24 years