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EMPLOYEES BENEFITS PLANS (Details) - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
F A F [Member]    
IfrsStatementLineItems [Line Items]    
Present value of actuarial liabilities R$ 3,121,348 R$ 3,340,497
Fair value of assets (3,603,611) (3,547,727)
(Surplus) Deficit (482,263) (207,230)
Irrecoverable surplus - (asset ceiling) 482,263 207,230
Beginning balance of irrecoverable surplus 207,230 175,981
Ending balance of irrecoverable surplus 482,263 207,230
Interest on irrecoverable surplus 18,152 13,181
Changes in irrecoverable surplus during the year 256,881 18,068
Ending balance of irrecoverable surplus 482,263 207,230
Beginning balance of the present value of liabilities 3,340,497 3,377,234
Ending balance of actuarial liabilities 3,121,348 3,340,497
Interest on actuarial obligations 283,241 246,073
Current service cost 23,189 26,741
Past service cost - plan changes (32,526)  
Benefit paid (213,804) (169,962)
Actuarial losses - experience (36,292) 325,778
Actuarial losses - hypothesis (242,957) (465,367)
Ending balance of actuarial liabilities 3,121,348 3,340,497
Beginning balance of the fair value of plan assets (3,547,727) (3,553,215)
Ending Balance of the fair value of the assets (3,603,611) (3,547,727)
Interest income on assets plan (301,394) (259,254)
Benefit paid 213,804 169,962
Return on assets higher (lower) than projection 31,706 94,780
Ending Balance of the fair value of the assets (3,603,611) (3,547,727)
Beginning balance 26,741 37,883
Ending balance 23,190 26,741
Reversion to accumulated losses (26,741) (37,883)
Actuarial gains (losses) 311,776 139,589
Return on assets higher (lower) than projection (31,705) (94,780)
Changes on irrecoverable surplus (256,881) (18,068)
Ending balance 23,190 26,741
Current service costs (23,190) (26,741)
Interest on actuarial obligations (283,241) (246,073)
Projected return on assets 301,394 259,254
Interest on irrecoverable surplus (18,153) (13,181)
Costs recognized in statement of income (23,190) (26,741)
Costs of defined benefit (18,153) (23,190)
Estimated costs for the next period (18,153) (23,190)
Plan I I [Member]    
IfrsStatementLineItems [Line Items]    
Present value of actuarial liabilities 20,822 23,981
Fair value of actuarial assets (22,745) (22,298)
(Surplus) Deficit (1,923) 1,683
Irrecoverable surplus - (asset ceiling) 1,923  
Net acturial asset   1,683
Beginning balance of irrecoverable surplus   167
Ending balance of irrecoverable surplus 1,923  
Interest on irrecoverable surplus   12
Changes in irrecoverable surplus during the year 1,923 (179)
Ending balance of irrecoverable surplus 1,923  
Beginning balance of the present value of liabilities 23,981 23,256
Ending balance of actuarial liabilities 20,822 23,981
Interest on actuarial obligations 1,997 1,627
Past service cost - plan changes (546)  
Benefit paid (1,838) (1,712)
Actuarial losses - experience (1,358) 4,278
Actuarial losses - hypothesis (1,414) (3,468)
Ending balance of actuarial liabilities 20,822 23,981
Beginning balance of the fair value of plan assets (22,298) (24,170)
Ending Balance of the fair value of the assets (22,745) (22,298)
Interest income on assets plan (1,851) (1,694)
Benefit paid 1,838 1,712
Return on assets higher (lower) than projection (434) 1,854
Ending Balance of the fair value of the assets (22,745) (22,298)
Beginning balance (2,485) (2,734)
Ending balance 3,385 (2,485)
Reversion to accumulated losses 2,485 2,734
Actuarial gains (losses) 2,772 (810)
Return on assets higher (lower) than projection 434 (1,854)
Changes on irrecoverable surplus 179 179
Ending balance 3,385 (2,485)
Interest on actuarial obligations (1,997) (1,627)
Projected return on assets 1,851 1,694
Interest on irrecoverable surplus   (12)
Costs recognized in statement of income R$ (146) R$ 55