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Employee benefits (Details 6)
 12 Months Ended
Dec. 31, 2023
PPSP-R [member]  
IfrsStatementLineItems [Line Items]  
Modality Defined Benefit
Participants of the plan Generally covers employees and former employees who joined the company after 1970 that agreed with changes proposed by the Company in its original pension plan (P0) and amendments.
New enrollments Closed
Indexation of Retirement payments by the plan Based on the Nationwide Consumer Price Index.
Parity contributions made by participants and the Company to the plans i) normal contributions that covers expected cost of the plans in the long term; and
Terms of Financial Commitment Financial obligations with a principal amounting to US$131 at 12/31/2023.
PPSP-R Pre-70 [member]  
IfrsStatementLineItems [Line Items]  
Modality Defined Benefit
Participants of the plan Generally covers employees and former employees hired prior to July 1, 1970, who enrolled in the P0 until January 1, 1996 and remained continuously linked to the original sponsor obtaining the condition of assisted.
New enrollments Closed
Parity contributions made by participants and the Company to the plans normal contributions that covers expected cost of the plans in the long term.
Terms of Financial Commitment Financial obligations with a principal amounting to US$390 at 12/31/2023.
PPSP-NR [member]  
IfrsStatementLineItems [Line Items]  
Modality Defined Benefit
Participants of the plan Generally covers employees and former employees who joined the company after 1970 that did not agree with changes proposed by the Company in its original pension plan (P0) and amendments
New enrollments Closed
Indexation of Retirement payments by the plan Based on the current index levels applicable to active employees’ salaries and the indexes set out by the Brazilian National Institute of Social Security.
Parity contributions made by participants and the Company to the plans i) normal contributions that covers expected cost of the plans in the long term; and
Terms of Financial Commitment Financial obligations settled early in 2021.
PPSP-NR Pre-70 [member]  
IfrsStatementLineItems [Line Items]  
Modality Defined Benefit
Participants of the plan Generally covers employees and former employees hired prior to July 1, 1970, who enrolled in the P0 until January 1, 1996 and remained continuously linked to the original sponsor obtaining the condition of assisted and did not agreed with changes in in its original pension plan (P0) and amendments.
New enrollments Closed
Parity contributions made by participants and the Company to the plans normal contributions that covers expected cost of the plans in the long term.
Terms of Financial Commitment Financial obligations with a principal amounting to US$267 at 12/31/2023.
PP-2 [member]  
IfrsStatementLineItems [Line Items]  
Modality Variable Contribution (defined benefit and defined contribution portions)
Participants of the plan This Plan was established in 2007, also covering employees and former employees that moved from other existing plans.
New enrollments Open
Retirement payments Lifetime defined benefit monthly payments or non- defined benefit monthly payments in accordance with the participant's election.
Indexation of Retirement payments by the plan Lifetime monthly payments: based on the Nationwide Consumer Price Index
Parity contributions made by participants and the Company to the plans i) normal contributions that covers expected cost of the plans in the long term; and
PP-3 [member]  
IfrsStatementLineItems [Line Items]  
Modality Defined Contribution
Participants of the plan This plan was implemented in 2021, exclusive option for voluntary migration of employees and retirees from the PPSP-R and PPSP-NR plans.
New enrollments Closed
Retirement payments Undefined benefit with monthly payments, in accordance with the participant election.
Other general benefits Lump sum death benefit (insured capital) and monthly payments related to the following events: death, disability, sickness, and seclusion.
Indexation of Retirement payments by the plan Undefined benefit monthly payments: based on the variation of individual account quota.
Parity contributions made by participants and the Company to the plans Regular contributions during the employment relationship, saving for the undefined benefit, accumulated in individual accounts
P P S P [Member]  
IfrsStatementLineItems [Line Items]  
Retirement payments Lifetime monthly payments supplementing the benefit granted by the Brazilian National Institute of Social Security.
Terms of Financial Commitment Annually remeasured in accordance with actuarial assumptions, with semi-annual payment of interest based on the updated balance and maturing in 2028.
P P S P And P P [Member]  
IfrsStatementLineItems [Line Items]  
Other general benefits Lump sum death benefit (insured capital) and monthly payments related to the following events: death, disability, sickness, and seclusion.
PPSP-R One [member]  
IfrsStatementLineItems [Line Items]  
Parity contributions made by participants and the Company to the plans ii) extraordinary contributions that covers additional costs that are generally derived from actuarial deficits.
PPSP-R Pre-70 One[member]  
IfrsStatementLineItems [Line Items]  
Parity contributions made by participants and the Company to the plans Participants are exempt from paying any extraordinary contributions in case of deficit until the settlement of the TFC.
PPSP-NR One [member]  
IfrsStatementLineItems [Line Items]  
Parity contributions made by participants and the Company to the plans ii) extraordinary contributions that covers additional costs that are generally derived from actuarial deficits.
PPSP-NR Pre-70 One [member]  
IfrsStatementLineItems [Line Items]  
Parity contributions made by participants and the Company to the plans Participants are exempt from paying any extraordinary contributions in case of deficit until the settlement of the TFC.
PP-2 One [member]  
IfrsStatementLineItems [Line Items]  
Parity contributions made by participants and the Company to the plans ii) extraordinary contributions that covers additional costs that are generally derived from actuarial deficits (these contributions are not currently being made but may occur in the future).