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EMPLOYEE BENEFITS (Tables) | 12 Months Ended
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Dec. 31, 2021
EMPLOYEE BENEFITS |
Schedule of total assets and liabilities of all types of employee benefits granted | ​
​ | ​ | ​ | ​ | ​
​ |  | 2021 |  | 2020
Plan assets - Defined contribution pension plan |  | 4,942 | ​ | 39,196
Total assets |  | 4,942 | ​ | 39,196
Actuarial liabilities - Defined benefit pension plan |  | 1,083,719 | ​ | 1,441,592
Acturial liabilities - Post-employment health care benefit |  | 318,181 | ​ | 362,944
Retirement and termination benefit liabilities |  | 13,290 | ​ | 56,903
Total liabilities |  | 1,415,190 | ​ | 1,861,439
Current |  | 39 | ​ | 208
Non-current |  | 1,415,151 | ​ | 1,861,231
Post-employment defined benefit pension plans |
EMPLOYEE BENEFITS |
Summary of sensitivity analysis | ​
​ | ​ | ​ | ​ | ​
​ |  | 1% Increase |  | 1% Decrease
Discount rate |  | (17,822) |  | 10,392
Defined benefit pension plan |
EMPLOYEE BENEFITS |
Schedule of current expenses of benefit plans | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2021 |  | 2020 |  | 2019
Cost of current service |  | 74,840 | ​ | 69,323 |  | 54,518
Interest expense |  | 170,897 | ​ | 191,326 |  | 189,544
Return on plan assets |  | (136,933) | ​ | (156,475) |  | (163,148)
Past service cost |  | 7,093 | ​ | 3,967 |  | 2,302
Settlement |  | (847) | ​ | (11,609) |  | (4,712)
Interest cost on unrecoverable surplus |  | 4,371 | ​ | 7,413 |  | 16,247
Net pension cost |  | 119,421 | ​ | 103,945 |  | 94,751
Schedule of reconciliations of assets and liabilities of benefit plans | ​
​ | ​ | ​ | ​ | ​
​ |  | 2021 |  | 2020
Present value of defined benefit obligation |  | (5,409,065) | ​ | (5,921,285)
Fair value of plan assets |  | 4,647,361 | ​ | 4,652,000
Asset ceiling restrictions on recognition of net funded assets |  | (322,015) | ​ | (172,307)
Net |  | (1,083,719) | ​ | (1,441,592)
Defined benefit obligation |  | (1,083,719) | ​ | (1,441,592)
Schedule of variation of plan obligations and assets | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2021 |  | 2020 |  | 2019
Variation of the plan obligations | ​ | ​ | ​ | ​ | ​ | ​
Obligation at the begining of the year |  | 5,921,285 |  | 4,601,965 |  | 4,391,251
Cost of service |  | 74,840 | ​ | 69,323 |  | 54,518
Interest expense |  | 170,897 | ​ | 191,326 |  | 189,544
Payments of the benefits |  | (486,310) | ​ | (434,650) |  | (309,817)
Past service cost |  | 7,093 | ​ | 3,967 |  | 2,302
Settlement |  | (228,881) | ​ | (190,948) |  | (498,493)
Acturial remeasurements |  | (457,421) | ​ | 467,106 |  | 546,911
Exchange Variance |  | 407,562 | ​ | 1,213,196 |  | 225,749
Obligation at the end of the year |  | 5,409,065 |  | 5,921,285 |  | 4,601,965
​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2021 |  | 2020 |  | 2019
Variation of the plan assets | ​ | ​ | ​ | ​ | ​ | ​
Fair value of the plan assets at the begining 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)
Payments 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 |  | 3,656,891
Summary of actuarial gains and losses recognized in other comprehensive income | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2021 |  | 2020 |  | 2019
Remeasurements | ​ | (25,498) | ​ | (334,675) |  | (386,767)
Actuarial Remeasurements |  | (457,421) | ​ | 467,106 |  | 546,911
Restriction recognized in Other Comprehensive Income |  | 178,941 | ​ | (42,317) |  | (94,198)
Remeasurements recognized in Other Comprehensive Income |  | (303,978) | ​ | 90,114 |  | 65,946
Summary of historical actuarial remeasurements | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2021 |  | 2020 |  | 2019 |  | 2018 |  | 2017
Present value of defined benefit obligation |  | (5,409,065) | ​ | (5,921,285) | ​ | (4,601,965) |  | (4,391,251) |  | (4,314,592)
Fair value of the plan assets |  | 4,647,361 | ​ | 4,652,000 | ​ | 3,656,891 |  | 3,568,934 |  | 3,456,613
Surplus (Deficit) |  | (761,704) | ​ | (1,269,285) | ​ | (945,074) |  | (822,317) |  | (857,979)
Experience adjustments on plan liabilities (Gain) |  | (457,421) | ​ | 467,106 | ​ | 546,911 |  | (370,083) |  | 235,549
Experience adjustments on plan assets (Gain) |  | (25,498) | ​ | (334,675) | ​ | (386,767) |  | 253,301 |  | (232,214)
Summary of allocation for plan assets | ​
​ | ​ | ​ | ​ | ​
​ | ​ | 2021
​ |  | Brazilian Plans |  | American Plans
Fixed income |  | 99.2% | ​ | 50.4%
Variable income |  | — | ​ | 43.0%
Others |  | 0.8% | ​ | 6.6%
Total |  | 100.0% | ​ | 100.0%
​
​ | ​ | ​ | ​ | ​
​ | ​ | 2020
​ |  | Brazilian Plans |  | American Plans
Fixed income |  | 99.1% | ​ | 46.6%
Variable income |  | — | ​ | 47.1%
Others |  | 0.9% | ​ | 6.3%
Total |  | 100.0% | ​ | 100.0%
Summary of assumptions | ​
​ | ​ | ​ | ​ | ​
​ |  | 2021
​ | ​ | Brazilian Plan |  | North America Plan
Average discount rate |  | 8.82% | ​ | 2.80% -2.90%
Rate of increase in compensation |  | Not applicable |  | 3.00%
Mortality table |  | AT-2000 per sex |  | RP-2006 and MP-2021
Mortality table of disabled |  | AT-2000 per sex |  | RP-2006 and MP-2021
Rate of rotation |  | Null |  | Based on age and/or the service
​
​ | ​ | ​ | ​ | ​
​ | ​ | 2020
​ |  | Brazilian Plan |  | North America Plan
Average discount rate |  | 6.56% | ​ | 2.25% - 2.50%
Rate of increase in compensation |  | Not applicable |  | 3.00%
Mortality table |  | AT-2000 per sex |  | RP-2006 and MP-2020
Mortality table of disabled |  | AT-2000 per sex |  | RP-2006 and MP-2020
Rate of rotation |  | Null |  | Based on age and/or the service
Post-employment health care benefit |
EMPLOYEE BENEFITS |
Schedule of current expenses of benefit plans | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2021 |  | 2020 |  | 2019
Current service cost |  | 3,458 | ​ | 4,964 |  | 3,302
Interest expense |  | 8,239 | ​ | 11,311 |  | 10,656
Past service cost |  | (32,434) | ​ | (660) |  | (2,717)
Net cost pension benefit |  | (20,737) | ​ | 15,615 |  | 11,241
Schedule of reconciliations of assets and liabilities of benefit plans | ​
​ | ​ | ​ | ​ | ​
​ |  | 2021 |  | 2020
Present value of obligations |  | (318,181) | ​ | (362,944)
Total net liabilities |  | (318,181) | ​ | (362,944)
Schedule of variation of plan obligations and assets | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2021 |  | 2020 |  | 2019
Change in benefit obligation | ​ | ​ | ​ | ​ | ​ | ​
Benefit obligation at beginning of the year |  | 362,944 |  | 298,989 |  | 272,959
Cost of service |  | 3,458 | ​ | 4,964 |  | 3,302
Interest expense |  | 8,239 | ​ | 11,311 |  | 10,656
Past service cost |  | (32,434) | ​ | (660) |  | (2,717)
Contributions from participants |  | 2,032 | ​ | 2,349 |  | 2,088
Payment of benefits |  | (17,431) | ​ | (20,870) |  | (15,331)
Remeasurements |  | (36,938) | ​ | (23,533) |  | 11,202
Exchange variations |  | 28,311 | ​ | 90,394 |  | 16,830
Benefit obligation at the end of the year |  | 318,181 | ​ | 362,944 |  | 298,989
​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2021 |  | 2020 |  | 2019
Change in plan assets | ​ | ​ | ​ | ​ | ​ | ​
Contributions from sponsors |  | 24,713 | ​ | 19,150 |  | 13,243
Contributions from participants |  | 2,032 | ​ | 2,349 |  | 2,088
Payments of benefits |  | (26,745) | ​ | (21,499) |  | (15,331)
Fair value of plan assets at end of the year |  | — | ​ | — |  | —
Summary of actuarial gains and losses recognized in other comprehensive income | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2021 |  | 2020 |  | 2019
Losses / Gains on actuarial obligation |  | (36,938) | ​ | (23,533) | ​ | 11,202
Actuarial losses recognized in Equity |  | (36,938) | ​ | (23,533) | ​ | 11,202
Summary of historical actuarial remeasurements | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2021 |  | 2020 |  | 2019 |  | 2018 |  | 2017
Present value of defined benefit obligation |  | (318,181) | ​ | (362,944) | ​ | (298,989) |  | (272,959) |  | (316,364)
Deficit |  | (318,181) | ​ | (362,944) | ​ | (298,989) |  | (272,959) |  | (316,364)
Experience adjustments on plan liabilities |  | (36,938) | ​ | (23,533) | ​ | 11,202 |  | (40,841) |  | (14,452)
Summary of assumptions | ​
​ | ​ | ​ | ​ | ​
​ |  | 2021 |  | 2020
Average discount rate |  | 2.80% - 2.90% | ​ | 2.25% - 2.50%
Health treatment - rate assumed next year |  | 4.99% - 6.20% | ​ | 6.10% - 6.50%
Health treatment - Assumed rate of decline in the cost to achieve in the years of 2028 to 2041 |  | 3.20% - 4.50% | ​ | 4.00% - 4.40%
Summary of sensitivity analysis | ​
​ | ​ | ​ | ​ | ​
​ |  | 1% Increase |  | 1% Decrease
Effect over total service costs and interest costs |  | 1,710 |  | (1,327)
Effect over benefit plan obligations |  | 32,082 |  | (26,573)

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