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Risk management (Details 10)
$ in Millions
Dec. 31, 2022
USD ($)
Probable Scenario Twelve [Member]  
IfrsStatementLineItems [Line Items]  
Increase Decrease In Risk Exposure Associated With Interst Rate Management $ 1,115
Reasonably Possible Scenario [Member]  
IfrsStatementLineItems [Line Items]  
Increase Decrease In Risk Exposure Associated With Interst Rate Management 1,550
Remote Scenario [Member]  
IfrsStatementLineItems [Line Items]  
Increase Decrease In Risk Exposure Associated With Interst Rate Management 1,987
L I B O R 3 M [Member] | Probable Scenario Twelve [Member]  
IfrsStatementLineItems [Line Items]  
Increase Decrease In Risk Exposure Associated With Interst Rate Management 12
L I B O R 3 M [Member] | Reasonably Possible Scenario [Member]  
IfrsStatementLineItems [Line Items]  
Increase Decrease In Risk Exposure Associated With Interst Rate Management 16
L I B O R 3 M [Member] | Remote Scenario [Member]  
IfrsStatementLineItems [Line Items]  
Increase Decrease In Risk Exposure Associated With Interst Rate Management 19
L I B O R 6 M [Member] | Probable Scenario Twelve [Member]  
IfrsStatementLineItems [Line Items]  
Increase Decrease In Risk Exposure Associated With Interst Rate Management 655
L I B O R 6 M [Member] | Reasonably Possible Scenario [Member]  
IfrsStatementLineItems [Line Items]  
Increase Decrease In Risk Exposure Associated With Interst Rate Management 917
L I B O R 6 M [Member] | Remote Scenario [Member]  
IfrsStatementLineItems [Line Items]  
Increase Decrease In Risk Exposure Associated With Interst Rate Management 1,179
S O F R 3 M M [Member] | Probable Scenario Twelve [Member]  
IfrsStatementLineItems [Line Items]  
Increase Decrease In Risk Exposure Associated With Interst Rate Management 84
S O F R 3 M M [Member] | Reasonably Possible Scenario [Member]  
IfrsStatementLineItems [Line Items]  
Increase Decrease In Risk Exposure Associated With Interst Rate Management 109
S O F R 3 M M [Member] | Remote Scenario [Member]  
IfrsStatementLineItems [Line Items]  
Increase Decrease In Risk Exposure Associated With Interst Rate Management 135
S O F R 6 M [Member] | Probable Scenario Twelve [Member]  
IfrsStatementLineItems [Line Items]  
Increase Decrease In Risk Exposure Associated With Interst Rate Management 17
S O F R 6 M [Member] | Reasonably Possible Scenario [Member]  
IfrsStatementLineItems [Line Items]  
Increase Decrease In Risk Exposure Associated With Interst Rate Management 23
S O F R 6 M [Member] | Remote Scenario [Member]  
IfrsStatementLineItems [Line Items]  
Increase Decrease In Risk Exposure Associated With Interst Rate Management 30
C D I [Member] | Probable Scenario Twelve [Member]  
IfrsStatementLineItems [Line Items]  
Increase Decrease In Risk Exposure Associated With Interst Rate Management 181
C D I [Member] | Reasonably Possible Scenario [Member]  
IfrsStatementLineItems [Line Items]  
Increase Decrease In Risk Exposure Associated With Interst Rate Management 253
C D I [Member] | Remote Scenario [Member]  
IfrsStatementLineItems [Line Items]  
Increase Decrease In Risk Exposure Associated With Interst Rate Management 325
T J L P [Member] | Probable Scenario Twelve [Member]  
IfrsStatementLineItems [Line Items]  
Increase Decrease In Risk Exposure Associated With Interst Rate Management 70
T J L P [Member] | Reasonably Possible Scenario [Member]  
IfrsStatementLineItems [Line Items]  
Increase Decrease In Risk Exposure Associated With Interst Rate Management 98
T J L P [Member] | Remote Scenario [Member]  
IfrsStatementLineItems [Line Items]  
Increase Decrease In Risk Exposure Associated With Interst Rate Management 126
Ibiritermo S.A. [member] | Probable Scenario Twelve [Member]  
IfrsStatementLineItems [Line Items]  
Increase Decrease In Risk Exposure Associated With Interst Rate Management 96
Ibiritermo S.A. [member] | Reasonably Possible Scenario [Member]  
IfrsStatementLineItems [Line Items]  
Increase Decrease In Risk Exposure Associated With Interst Rate Management 134
Ibiritermo S.A. [member] | Remote Scenario [Member]  
IfrsStatementLineItems [Line Items]  
Increase Decrease In Risk Exposure Associated With Interst Rate Management $ 173