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Employee benefits (Details Narrative)
$ in Millions
 12 Months Ended
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
IfrsStatementLineItems [Line Items]    
Payment relating to the PPP provisioned $ 85 $ 507
Provision relating to PPP 553  
Payment relating to the PRL provisioned 132 129
Temination benefits $ 11,688 11,418
Description of installments As of December 31, 2022, from the balance of US$ 192, US$ 22 refers to the second installment of 426 retired employees and US$ 170 refers to 1,651 employees enrolled in voluntary severance programs with expected termination by September 2025.  
Net defined benefit liability (asset) at beginning of period $ 20,447 27,217
Exchange Rate Cross Currency Swap [Member] 2,397 3,035
Increase (decrease) in net defined benefit liability (asset) resulting from interest expense (income) 2,268 1,992
Increase in net defined benefit liability (asset) resulting from current service cost 129 199
Increase (decrease) in net defined benefit liability (asset) resulting from past service cost   844
Disclosure Of Foreign Currency Exchange Exposure [line items] 1,446 (5,786)
Increase (decrease) in reimbursement rights related to defined benefit obligation, resulting from gain (loss) on remeasurement 1,872 (546)
Decrease (increase) in net defined benefit liability (asset) resulting from actuarial gains (losses) arising from changes in demographic assumptions (15) 91
Decrease (increase) in net defined benefit liability (asset) resulting from actuarial gains (losses) arising from changes in financial assumptions (411) (5,331)
Others   (4,019)
Benefits Paid Fair Value Of Plan Assets (1,923) (1,645)
Contributions Paid By Participants 29 33
Transfer And Contribution For PP   (711)
Cumulative Translation Adjustments 1,417 (1,696)
Net defined benefit liability (asset) at end of period 23,805 20,447
Common Shares [Member]    
IfrsStatementLineItems [Line Items]    
Investment portfolio 2 243
Debentures [Member]    
IfrsStatementLineItems [Line Items]    
Investment portfolio $ 1 1
Profit sharing [member]    
IfrsStatementLineItems [Line Items]    
Percentage of net income distributed to shareholders 6.25%  
Percentage of dividend distributed to shareholders 25.00%  
Profit sharing [member] | Top of range [member]    
IfrsStatementLineItems [Line Items]    
Adjustment to profit sharing distribution 0.05  
Line of credit facility amount withdrawn    
IfrsStatementLineItems [Line Items]    
Net defined benefit liability (asset) at beginning of period $ 11,481 [1] 15,847 [2]
Exchange Rate Cross Currency Swap [Member] 1,277 [3] 1,178 [2]
Increase (decrease) in net defined benefit liability (asset) resulting from interest expense (income) 1,267 [3] 1,166 [2]
Increase in net defined benefit liability (asset) resulting from current service cost 10 [3] 13 [2]
Increase (decrease) in net defined benefit liability (asset) resulting from past service cost [2]   (1)
Disclosure Of Foreign Currency Exchange Exposure [line items] 281 [3] (2,969) [2]
Increase (decrease) in reimbursement rights related to defined benefit obligation, resulting from gain (loss) on remeasurement 1,367 [3] (313) [2]
Decrease (increase) in net defined benefit liability (asset) resulting from actuarial gains (losses) arising from changes in financial assumptions (1,086) [3] (2,656) [2]
Others [2]   (2,575)
Benefits Paid Fair Value Of Plan Assets (1,088) [3] (952) [2]
Contributions Paid By Participants 23 [3] 26 [2]
Transfer And Contribution For PP [2]   (680)
Cumulative Translation Adjustments 797 [3] (969) [2]
Net defined benefit liability (asset) at end of period 12,771 [3],[4] 11,481 [1]
Petroleo Brasileiro S-A [member]    
IfrsStatementLineItems [Line Items]    
Net defined benefit liability (asset) at beginning of period 3,485 [1] 4,811 [2]
Exchange Rate Cross Currency Swap [Member] 382 [3] 355 [2]
Increase (decrease) in net defined benefit liability (asset) resulting from interest expense (income) 381 [3] 354 [2]
Increase in net defined benefit liability (asset) resulting from current service cost 1 [3] 1 [2]
Disclosure Of Foreign Currency Exchange Exposure [line items] 380 [3] (1,041) [2]
Increase (decrease) in reimbursement rights related to defined benefit obligation, resulting from gain (loss) on remeasurement 687 [3] (301) [2]
Decrease (increase) in net defined benefit liability (asset) resulting from actuarial gains (losses) arising from changes in demographic assumptions [3] 4  
Decrease (increase) in net defined benefit liability (asset) resulting from actuarial gains (losses) arising from changes in financial assumptions (311) [3] (740) [2]
Others [2]   (640)
Benefits Paid Fair Value Of Plan Assets (379) [3] (319) [2]
Contributions Paid By Participants 6 [3] 7 [2]
Transfer And Contribution For PP [2]   (31)
Cumulative Translation Adjustments 245 [3] (297) [2]
Net defined benefit liability (asset) at end of period 4,119 [3],[4] 3,485 [1]
Pension Plans Petros Two [Member]    
IfrsStatementLineItems [Line Items]    
Net defined benefit liability (asset) at beginning of period 987 1,177
Exchange Rate Cross Currency Swap [Member] 129 122
Increase (decrease) in net defined benefit liability (asset) resulting from interest expense (income) 116 85
Increase in net defined benefit liability (asset) resulting from current service cost 13 37
Disclosure Of Foreign Currency Exchange Exposure [line items] (6) (168)
Increase (decrease) in reimbursement rights related to defined benefit obligation, resulting from gain (loss) on remeasurement 95 315
Decrease (increase) in net defined benefit liability (asset) resulting from actuarial gains (losses) arising from changes in demographic assumptions 6 (5)
Decrease (increase) in net defined benefit liability (asset) resulting from actuarial gains (losses) arising from changes in financial assumptions (107) (478)
Others   (144)
Benefits Paid Fair Value Of Plan Assets (72) (65)
Cumulative Translation Adjustments 63 (79)
Net defined benefit liability (asset) at end of period 1,102 987
Collaboration arrangements [domain]    
IfrsStatementLineItems [Line Items]    
Net defined benefit liability (asset) at beginning of period 4,485 5,356
Exchange Rate Cross Currency Swap [Member] 609 1,388
Increase (decrease) in net defined benefit liability (asset) resulting from interest expense (income) 504 385
Increase in net defined benefit liability (asset) resulting from current service cost 105 158
Increase (decrease) in net defined benefit liability (asset) resulting from past service cost   845
Disclosure Of Foreign Currency Exchange Exposure [line items] 791 (1,601)
Increase (decrease) in reimbursement rights related to defined benefit obligation, resulting from gain (loss) on remeasurement (277) (239)
Decrease (increase) in net defined benefit liability (asset) resulting from actuarial gains (losses) arising from changes in demographic assumptions (25) 96
Decrease (increase) in net defined benefit liability (asset) resulting from actuarial gains (losses) arising from changes in financial assumptions 1,093 (1,458)
Others   (658)
Benefits Paid Fair Value Of Plan Assets (384) (309)
Cumulative Translation Adjustments 312 (349)
Net defined benefit liability (asset) at end of period 5,813 4,485
Other plans [member]    
IfrsStatementLineItems [Line Items]    
Net defined benefit liability (asset) at beginning of period 9 26
Exchange Rate Cross Currency Swap [Member]   (8)
Increase (decrease) in net defined benefit liability (asset) resulting from interest expense (income)   2
Increase in net defined benefit liability (asset) resulting from current service cost   (10)
Disclosure Of Foreign Currency Exchange Exposure [line items]   (7)
Increase (decrease) in reimbursement rights related to defined benefit obligation, resulting from gain (loss) on remeasurement   (8)
Decrease (increase) in net defined benefit liability (asset) resulting from actuarial gains (losses) arising from changes in financial assumptions   1
Others 2 (2)
Cumulative Translation Adjustments   (2)
Net defined benefit liability (asset) at end of period   $ 9
P P 1 [Member]    
IfrsStatementLineItems [Line Items]    
Post-employment benefit expense, defined contribution plans 2,130  
P P 2 [Member]    
IfrsStatementLineItems [Line Items]    
Post-employment benefit expense, defined contribution plans 197  
P P 3 [Member]    
IfrsStatementLineItems [Line Items]    
Post-employment benefit expense, defined contribution plans $ 2  
[1] It includes the balance of PPSP-R pre-70 and PPSP-NR pre-70.
[2] It includes the balance of PPSP-R pre-70 and PPSP-NR pre-70.
[3] It includes the balance of PPSP-R pre-70 and PPSP-NR pre-70.
[4] It includes the balance of PPSP-R pre-70 and PPSP-NR pre-70.