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Supplemental information on statement of cash flows (Tables)
 12 Months Ended
Dec. 31, 2022
Supplemental Information On Statement Of Cash Flows  
Schedule of supplemental information on statement of cash flows
     
  2022 2021 2020
Amounts paid/received during the year:      
Withholding income tax paid on behalf of third-parties 1,413 904 770
Transactions  not involving cash      
Purchase of property, plant and equipment on credit 19 − 310
Lease 6,923 6,945 4,255
Provision/(reversals) for decommissioning costs 3,260 (1,082) 5,174
Use of tax credits and judicial deposit for the payment of contingency 1,236 1,173 2
Assets received due to the increase of interest in concessions without disbursement − 165 −
Remeasurement of property, plant and equipment acquired in previous periods 24 − −
Earn Out related to Atapu and Sépia groups 694 54 −
Schedule of cash and cash equivalents in the statement of cash flows
   
  2022 2021
Reconciliation of the balance at the beginning of the period     
Cash and cash equivalents in statements of financial position 10,467 11,711
Cash and cash equivalents classified as assets held for sale (note 30) 13 14
Cash and cash equivalents according to Statements of Cash Flows (opening balance) 10,480 11,725
Reconciliation of the balance at the end 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 (note 30) − 13
Cash and cash equivalents according to Statements of Cash Flows (closing balance) 7,996 10,480
Schedule of Reconciliation of Depreciation, depletion and amortization with Statements of Cash Flows
     
 
 2022 2021 2020
Depreciation of Property, plant and equipment 14,618 12,955 12,326
Amortization of Intangible assets 77 60 66
Capitalized depreciation (1,343) (1,240) (973)
Depreciation of right of use - recovery of PIS/COFINS (134) (80) 26
Depreciation, depletion and amortization in the Statements of Cash Flows 13,218 11,695 11,445