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Financial risk management (Details 12)
$ in Millions
Jun. 30, 2024
USD ($)
Probable Scenario Twelve [Member]  
IfrsStatementLineItems [Line Items]  
Increase Decrease In Risk Exposure Associated With Interst Rate Management $ 832
Reasonably Possible Scenario [Member]  
IfrsStatementLineItems [Line Items]  
Increase Decrease In Risk Exposure Associated With Interst Rate Management 1,130
Remote Scenario [Member]  
IfrsStatementLineItems [Line Items]  
Increase Decrease In Risk Exposure Associated With Interst Rate Management 1,428
LIBOR 6M [Member] | Probable Scenario Twelve [Member]  
IfrsStatementLineItems [Line Items]  
Increase Decrease In Risk Exposure Associated With Interst Rate Management 4
LIBOR 6M [Member] | Reasonably Possible Scenario [Member]  
IfrsStatementLineItems [Line Items]  
Increase Decrease In Risk Exposure Associated With Interst Rate Management 5
LIBOR 6M [Member] | Remote Scenario [Member]  
IfrsStatementLineItems [Line Items]  
Increase Decrease In Risk Exposure Associated With Interst Rate Management 5
SOFR 3M [Member] | Probable Scenario Twelve [Member]  
IfrsStatementLineItems [Line Items]  
Increase Decrease In Risk Exposure Associated With Interst Rate Management 109
SOFR 3M [Member] | Reasonably Possible Scenario [Member]  
IfrsStatementLineItems [Line Items]  
Increase Decrease In Risk Exposure Associated With Interst Rate Management 141
SOFR 3M [Member] | Remote Scenario [Member]  
IfrsStatementLineItems [Line Items]  
Increase Decrease In Risk Exposure Associated With Interst Rate Management 173
SOFR 6M [Member] | Probable Scenario Twelve [Member]  
IfrsStatementLineItems [Line Items]  
Increase Decrease In Risk Exposure Associated With Interst Rate Management 106
SOFR 6M [Member] | Reasonably Possible Scenario [Member]  
IfrsStatementLineItems [Line Items]  
Increase Decrease In Risk Exposure Associated With Interst Rate Management 126
SOFR 6M [Member] | Remote Scenario [Member]  
IfrsStatementLineItems [Line Items]  
Increase Decrease In Risk Exposure Associated With Interst Rate Management 146
SOFR ON [Member] | Probable Scenario Twelve [Member]  
IfrsStatementLineItems [Line Items]  
Increase Decrease In Risk Exposure Associated With Interst Rate Management 251
SOFR ON [Member] | Reasonably Possible Scenario [Member]  
IfrsStatementLineItems [Line Items]  
Increase Decrease In Risk Exposure Associated With Interst Rate Management 351
SOFR ON [Member] | Remote Scenario [Member]  
IfrsStatementLineItems [Line Items]  
Increase Decrease In Risk Exposure Associated With Interst Rate Management 452
CDI [Member] | Probable Scenario Twelve [Member]  
IfrsStatementLineItems [Line Items]  
Increase Decrease In Risk Exposure Associated With Interst Rate Management 208
CDI [Member] | Reasonably Possible Scenario [Member]  
IfrsStatementLineItems [Line Items]  
Increase Decrease In Risk Exposure Associated With Interst Rate Management 291
CDI [Member] | Remote Scenario [Member]  
IfrsStatementLineItems [Line Items]  
Increase Decrease In Risk Exposure Associated With Interst Rate Management 374
TR [Member] | Probable Scenario Twelve [Member]  
IfrsStatementLineItems [Line Items]  
Increase Decrease In Risk Exposure Associated With Interst Rate Management 5
TR [Member] | Reasonably Possible Scenario [Member]  
IfrsStatementLineItems [Line Items]  
Increase Decrease In Risk Exposure Associated With Interst Rate Management 7
TR [Member] | Remote Scenario [Member]  
IfrsStatementLineItems [Line Items]  
Increase Decrease In Risk Exposure Associated With Interst Rate Management 9
TJLP [Member] | Probable Scenario Twelve [Member]  
IfrsStatementLineItems [Line Items]  
Increase Decrease In Risk Exposure Associated With Interst Rate Management 55
TJLP [Member] | Reasonably Possible Scenario [Member]  
IfrsStatementLineItems [Line Items]  
Increase Decrease In Risk Exposure Associated With Interst Rate Management 77
TJLP [Member] | Remote Scenario [Member]  
IfrsStatementLineItems [Line Items]  
Increase Decrease In Risk Exposure Associated With Interst Rate Management 99
IPCA [Member] | Probable Scenario Twelve [Member]  
IfrsStatementLineItems [Line Items]  
Increase Decrease In Risk Exposure Associated With Interst Rate Management 94
IPCA [Member] | Reasonably Possible Scenario [Member]  
IfrsStatementLineItems [Line Items]  
Increase Decrease In Risk Exposure Associated With Interst Rate Management 132
IPCA [Member] | Remote Scenario [Member]  
IfrsStatementLineItems [Line Items]  
Increase Decrease In Risk Exposure Associated With Interst Rate Management $ 170