XML 142 R123.htm IDEA: XBRL DOCUMENT v3.21.1
Post-employment Benefits - Actuarial assumptions (Details)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Post-employment Benefits    
Actuarial assumption of retirement age 65 years 65 years
Discount rate (as a percent) 6.60% 7.00%
Salary increase (as a percent) 5.00% 5.00%
Inflation rate (as a percent) 3.50% 3.50%