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Equity - Share buyback and treasury shares (Details)
R$ in Millions, $ in Millions
 1 Months Ended 12 Months Ended
Jun. 30, 2022
USD ($)
Jun. 30, 2022
BRL (R$)
Dec. 31, 2022
USD ($)
shares
Dec. 31, 2021
USD ($)
shares
Apr. 27, 2022
shares
Oct. 28, 2021
shares
Apr. 02, 2021
shares
IfrsStatementLineItems [Line Items]              
Number of shares repurchased [1]     178,627,077        
Number of shares repurchased [1]            
Purchase of treasury shares $ 1,291 R$ 6,520 $ 2,785 [1] [1]      
Share buyback program number of shares authorized to be repurchased [1]     357,442,577 291,184,500      
Share buyback program number of value authorized to be repurchased | $ [1]     $ 6,036 $ 5,546      
Ordinary shares [member] | Treasury shares [member]              
IfrsStatementLineItems [Line Items]              
Share buyback program, number of shares authorized to be repurchased         500,000,000   270,000,000
Acquired Parent [Member]              
IfrsStatementLineItems [Line Items]              
Number of shares repurchased [2]     81,855,600        
Number of shares repurchased [2]       139,018,347      
Purchase of treasury shares | $ [2]     $ 1,501 $ 3,008      
Acquired By Wholly Owned Subsidiaries [Member]              
IfrsStatementLineItems [Line Items]              
Number of shares repurchased [2]     96,959,900        
Number of shares repurchased [2]       152,166,153      
Purchase of treasury shares | $ [2]     $ 1,750 $ 2,538      
Shares Buyback Program [Member]              
IfrsStatementLineItems [Line Items]              
Number of shares repurchased [2]     178,815,500        
Number of shares repurchased [2]       291,184,500      
Purchase of treasury shares | $ [2]       $ 5,546      
Shares Buyback Program 1 [Member]              
IfrsStatementLineItems [Line Items]              
Purchase of treasury shares | $ [2]     $ 3,251        
Acquired Parent 1 [Member]              
IfrsStatementLineItems [Line Items]              
Number of shares repurchased [1]     87,779,900        
Number of shares repurchased [1]            
Purchase of treasury shares | $ [1]     $ 1,375      
Acquired By Wholly Owned Subsidiaries 1 [Member]              
IfrsStatementLineItems [Line Items]              
Number of shares repurchased [1]     90,847,177        
Number of shares repurchased [1]            
Purchase of treasury shares | $ [1]     $ 1,410      
Wholly-owned subsidiaries | ADR [Member]              
IfrsStatementLineItems [Line Items]              
Share buyback program, number of shares authorized to be repurchased           200,000,000  
[1] On April 27, 2022, the Board of Directors approved the common shares buyback program, limited to a maximum of 500,000,000 common shares or their respective ADRs.
[2] On April 1, 2021, the Board of Directors approved the common shares buyback program, limited to a maximum of 270,000,000 common shares or their respective ADRs. Continuing the previous program, the Board of Directors approved a new shares buyback program on October 28, 2021, with a limit of up to 200,000,000 common shares or their respective ADRs. Both programs were concluded in 2022.