XML 199 R99.htm IDEA: XBRL DOCUMENT v3.22.0.1
Pensions - Actuarial assumptions (Details)
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Weighted-average duration of the defined benefit obligation 15 years 2 months 12 days 15 years 7 months 6 days
Description of Expected attrition Expected attrition at 31 December 2021 was 0.3% and 3.9% for employees between 50-59 years and 60-67 years, and 0.3% and 3.6% in 2020. The attrition rate for the age group 60-67 years represents employees with immediate withdrawal of vested pension, thus remaining in the scheme.  
Employee age group (50-59 years) [Member]    
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Expected attrition rate of employees 0.30% 0.30%
Employee age group (60-67 years) [Member]    
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Expected attrition rate of employees 3.90% 3.60%
Discount rate [member]    
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Assumptions used to determine benefit costs 1.75% 2.25%
Percentage Actuarial Assumption To Determine Defined Benefit Obligations 2.00% 1.75%
Rate of compensation increase [member]    
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Assumptions used to determine benefit costs 2.00% 2.25%
Percentage Actuarial Assumption To Determine Defined Benefit Obligations 2.50% 2.00%
Expected rate of pension increase [member]    
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Assumptions used to determine benefit costs 1.25% 1.50%
Percentage Actuarial Assumption To Determine Defined Benefit Obligations 1.75% 1.25%
Expected increase of social security base amount (G-amount) [member]    
Disclosure of sensitivity analysis for actuarial assumptions [line items]    
Assumptions used to determine benefit costs 2.00% 2.25%
Percentage Actuarial Assumption To Determine Defined Benefit Obligations 2.25% 2.00%