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Costs and expenses by nature (Tables)
 12 Months Ended
Dec. 31, 2023
Notes and other explanatory information [abstract]  
Schedule of cost of sales
     
  2023 2022 2021
Raw material, products for resale, materials and third-party services (1) (23,858) (32,354) (20,869)
Depreciation, depletion and amortization (10,779) (10,514) (9,277)
Production taxes (12,108) (14,953) (11,136)
Employee compensation (1,690) (1,665) (1,882)
Total (48,435) (59,486) (43,164)
(1) It Includes short-term leases and inventory turnover.      
Schedule of selling expenses
     
  2023 2022 2021
Materials, third-party services, freight, rent and other related costs (4,296) (3,987) (3,542)
Depreciation, depletion and amortization (609) (789) (610)
Allowance for expected credit losses (22) (58) 12
Employee compensation (111) (97) (89)
Total (5,038) (4,931) (4,229)
Schedule of general and administrative expenses
     
  2023 2022 2021
Employee compensation (1,036) (865) (834)
Materials, third-party services, rent and other related costs (435) (362) (256)
Depreciation, depletion and amortization (123) (105) (86)
Total (1,594) (1,332) (1,176)