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Supplemental information on statement of cash flows (Tables)
6 Months Ended
Jun. 30, 2023
Supplemental Information On Statement Of Cash Flows  
Summary of supplemental information on statement of cash flows
   
  Jan-Jun/2023 Jan-Jun/2022
Amounts paid/received during the period:    
Withholding income tax paid on behalf of third-parties 679 604
Transactions  not involving cash    
Purchase of property, plant and equipment on credit 19
Lease 7,249 3,168
Provision for decommissioning costs 6 10
Use of tax credits and judicial deposit for the payment of contingency 51 1,137
Remeasurement of property, plant and equipment acquired in previous periods 12 38
Summary of cash and cash equivalents in the statement of cash flows
   
  Jan-Jun/2023 Jan-Jun/2022
Reconciliation of the balance at the beginning of the period    
Cash and cash equivalents in statements of financial position 7,996 10,467
Cash and cash equivalents classified as assets held for sale 13
Cash and cash equivalents according to Statements of Cash Flows (opening balance) 7,996 10,480
Reconciliation of the balance at the end of the period    
Cash and cash equivalents in statements of financial position 10,351 16,287
Cash and cash equivalents classified as assets held for sale 7
Cash and cash equivalents according to Statements of Cash Flows (closing balance) 10,351 16,294
Summary of Reconciliation of Depreciation, depletion and amortization with Statements of Cash Flows
   
  Jan-Jun/2023 Jan-Jun/2022
Depreciation of Property, plant and equipment 7,145 7,361
Amortization of Intangible assets 48 37
Capitalized depreciation (940) (696)
Depreciation of right of use - recovery of PIS/COFINS (80) (72)
Depreciation, depletion and amortization in the Statements of Cash Flows 6,173 6,630