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Provision for de-characterization of dam structures and asset retirement obligations (Details 1) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
IfrsStatementLineItems [Line Items]    
Other provisions $ 3,060 $ 3,312
Total other provisions 4,279 3,882
Provision For Decommissioning Restoration And Rehabilitation Costs And Environmental Provisions [Member]    
IfrsStatementLineItems [Line Items]    
Other provisions 4,279 3,882
Provision For Decommissioning Restoration And Rehabilitation Costs And Environmental Provisions [Member] | Country Of Brazil [Member]    
IfrsStatementLineItems [Line Items]    
Other provisions $ 2,415 $ 1,863
Discount rate 5.47% 6.20%
Cash flow maturity $ 2,132 $ 2,096
Provision For Decommissioning Restoration And Rehabilitation Costs And Environmental Provisions [Member] | Country Of Canada [Member]    
IfrsStatementLineItems [Line Items]    
Other provisions $ 1,592 $ 1,683
Discount rate 1.30% 1.11%
Cash flow maturity $ 2,150 $ 2,151
Provision For Decommissioning Restoration And Rehabilitation Costs And Environmental Provisions [Member] | Country Of Oman [Member]    
IfrsStatementLineItems [Line Items]    
Other provisions $ 158 $ 114
Discount rate 3.19% 3.90%
Cash flow maturity $ 2,035 $ 2,035
Provision For Decommissioning Restoration And Rehabilitation Costs And Environmental Provisions [Member] | Country Of Indonesia [Member]    
IfrsStatementLineItems [Line Items]    
Other provisions $ 73
Discount rate 4.33%
Cash flow maturity $ 2,061
Provision For Decommissioning Restoration And Rehabilitation Costs And Environmental Provisions [Member] | Other Regions [Member]    
IfrsStatementLineItems [Line Items]    
Other provisions $ 114 $ 149
Discount rate 2.04% 1.92%
Operating Plants [Member]    
IfrsStatementLineItems [Line Items]    
Other provisions $ 3,155 $ 2,971
Closed Plants [Member]    
IfrsStatementLineItems [Line Items]    
Other provisions $ 1,124 $ 911