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Property, plant and equipment (Tables)
 12 Months Ended
Dec. 31, 2023
Notes and other explanatory information [abstract]  
Schedule of property, plant and equipment by class of assets
           
 

Land, buildings

and

improvement

 Equipment and other assets (1)

Assets under

construction (2)

 Exploration and development costs (3) Right-of-use assets Total
Balance at January 1, 2023 2,538 55,147 14,838 38,434 19,212 130,169
Cost 4,343 105,429 23,938 67,581 29,670 230,961
Accumulated depreciation and impairment (4) (1,805) (50,282) (9,100) (29,147) (10,458) (100,792)
Additions − 528 11,919 12 15,177 27,636
Decommissioning costs - Additions to / review of estimates − − − 2,672 − 2,672
Capitalized borrowing costs − − 1,277 − − 1,277
Signature Bonuses Transfers (5) − − − 16 − 16
Write-offs (11) (304) (86) (74) (156) (631)
Transfers (6) 58 5,531 (7,058) 1,754 1 286
Transfers to assets held for sale (16) (36) 99 (241) (85) (279)
Depreciation, amortization and depletion (84) (5,079) − (4,711) (5,432) (15,306)
Impairment recognition (note 26) − (1,689) (883) (314) (39) (2,925)
Impairment reversal (note 26) 3 101 9 1 28 142
Translation adjustment 199 4,210 1,401 2,883 1,674 10,367
Balance at December 31, 2023 2,687 58,409 21,516 40,432 30,380 153,424
Cost 4,634 118,173 31,467 74,809 44,829 273,912
Accumulated depreciation and impairment (4) (1,947) (59,764) (9,951) (34,377) (14,449) (120,488)

 

             
Balance at January 1, 2022 2,383 53,126 16,922 35,847 17,052 125,330
Cost 4,080 98,085 25,954 61,906 26,382 216,407
Accumulated depreciation and impairment (4) (1,697) (44,959) (9,032) (26,059) (9,330) (91,077)
Additions − 841 7,525 48 7,126 15,540
Decommissioning costs - Additions to / review of estimates − − − 3,269 − 3,269
Capitalized borrowing costs − − 1,021 − − 1,021
Signature Bonuses Transfers (5) − − − 1,177 − 1,177
Write-offs               (20) (746) (2,152) (667) (1,469) (5,054)
Transfers (6) 130 5,162 (8,611) 3,617 2 300
Transfers to assets held for sale (27) (1,874) (410) (1,976) (140) (4,427)
Depreciation, amortization and depletion (88) (4,746) − (5,306) (4,478) (14,618)
Impairment recognition (note 26) − (693) (605) (142) (13) (1,453)
Impairment reversal (note 26) − 223 15 52 − 290
Translation adjustment 160 3,854 1,133 2,515 1,132 8,794
Balance at December 31, 2022 2,538 55,147 14,838 38,434 19,212 130,169
Cost 4,343 105,429 23,938 67,581 29,670 230,961
Accumulated depreciation and impairment (4) (1,805) (50,282) (9,100) (29,147) (10,458) (100,792)
(1) It is composed of production platforms, refineries, thermoelectric power plants, natural gas processing plants, pipelines, and other operating, storage and production plants, including subsea equipment for the production and flow of oil and gas, depreciated based on the units of production method.
(2) See note 13 for assets under construction by operating segment.
(3) It is composed of exploration and production assets related to wells, abandonment and dismantling of areas, signature bonuses associated with proved reserves and other costs directly associated with the exploration and production of oil and gas.
(4) In the case of land and assets under construction, it refers only to impairment losses.
(5)  Transfers from intangible assets.  In 2023, it refers to the declaration of commerciality of the Manjuba, Espadim, Raia Manta and Raia Pintada fields. In 2022, it relates to Itapu, Sépia and Atapu.
(6) It mainly includes transfers between classes of assets and transfers from advances to suppliers.
Schedule of useful life of assets
 
Asset Weighted average useful life in years
Buildings and improvement 40  (between 25 and 50)
Equipment and other assets 20 (between 3 to 31) - except assets by the units of production method
Exploration and development costs Units of production method
Right-of-use 8 (between 2 and 47)
Schedule of estimated useful life of buildings and improvements, equipment and other assets
     
  Buildings and improvements, equipment and other assets
       
Estimated useful life Cost Accumulated  depreciation Balance at December 31, 2023
5  years or less 6,065 (5,111) 954
6 - 10 years 8,312 (6,477) 1,835
11 - 15 years 5,811 (2,357) 3,454
16 - 20 years 31,428 (19,908) 11,520
21 - 25 years 33,217 (9,294) 23,923
25 - 30 years 12,915 (4,270) 8,645
30 years or more 5,417 (2,138) 3,279
Units of production method 19,503 (12,150) 7,353
Total 122,668 (61,705) 60,963
Buildings and improvements 4,495 (1,941) 2,554
Equipment and other assets 118,173 (59,764) 58,409
       
Schedule of accumulated depreciation and impairment
       
  Platforms Vessels Properties Total
Balance at December 31, 2023 19,056 9,204 2,120 30,380
Cost 23,859 18,000 2,970 44,829
Accumulated depreciation and impairment (4,803) (8,796) (850) (14,449)
Without contractual readjustment clauses − (7,103) (168) (7,271)
With contractual readjustment clauses  - Brazil (4,803) (225) − (5,028)
With contractual readjustment clauses – abroad − (1,468) (682) (2,150)
Balance at December 31, 2022 9,211 8,254 1,747 19,212
Cost 12,604 14,788 2,278 29,670
Accumulated depreciation and impairment (3,393) (6,534) (531) (10,458)
Without contractual readjustment clauses − (5,322) (64) (5,386)
With contractual readjustment clauses  - Brazil (3,393) (218) − (3,611)
With contractual readjustment clauses – abroad − (994) (467) (1,461)