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EMPLOYEE BENEFITS - Defined benefit pension plan - Variation of the plan assets (Details) - Defined benefit pension plan - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
EMPLOYEE BENEFITS      
Fair value of the plan assets at the beginning of the year R$ (1,441,592)    
Return of the plan assets 136,933 R$ 156,475 R$ 163,148
Fair value of plan assets at the end of the year (1,083,719) (1,441,592)  
Plan assets      
EMPLOYEE BENEFITS      
Fair value of the plan assets at the beginning of the year 4,652,000 3,656,891 3,568,934
Return of the plan assets 136,933 156,475 163,148
Contributions from sponsors 244,123 224,979 162,650
Settlement (228,034) (179,339) (493,781)
Payment of benefits (486,310) (434,650) (309,817)
Remeasurement 25,498 334,675 386,767
Exchange Variance 303,151 892,969 178,990
Fair value of plan assets at the end of the year 4,647,361 4,652,000 R$ 3,656,891
Value of shares included in fair value of plan assets R$ 17,785 R$ 8,745