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30. EMPLOYEE BENEFITS (Details 8) | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Plan covering 35% Of The Average Salary [member] | Male [member] |  |
Disclosure of defined benefit plans [line items] |  |
Average life expectancy of employees (in years) | 18.38 | 18.38
Average life expectancy in years of employees who are 40 (in years) | 40.15 | 40.15
Plan covering 35% Of The Average Salary [member] | Female [member] |  |
Disclosure of defined benefit plans [line items] |  |
Average life expectancy of employees (in years) | 18.38 | 18.38
Average life expectancy in years of employees who are 40 (in years) | 40.15 | 40.15
Average Salary Supplementation Plan [member] | Male [member] |  |
Disclosure of defined benefit plans [line items] |  |
Average life expectancy of employees (in years) | 18.75 | 18.75
Average life expectancy in years of employees who are 40 (in years) | 40.60 | 40.60
Average Salary Supplementation Plan [member] | Female [member] |  |
Disclosure of defined benefit plans [line items] |  |
Average life expectancy of employees (in years) | 21.41 | 21.41
Average life expectancy in years of employees who are 40 (in years) | 44.41 | 44.41
Mixed Supplementary Benefit Plan [member] | Male [member] |  |
Disclosure of defined benefit plans [line items] |  |
Average life expectancy of employees (in years) | 21.47 | 20.45
Average life expectancy in years of employees who are 40 (in years) | 44.07 | 42.70
Mixed Supplementary Benefit Plan [member] | Female [member] |  |
Disclosure of defined benefit plans [line items] |  |
Average life expectancy of employees (in years) | 23.34 | 23.02
Average life expectancy in years of employees who are 40 (in years) | 46.68 | 46.28

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