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Equity (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
IfrsStatementLineItems [Line Items]    
Beginning balance $ 72,641 $ 66,434
Additional dividends proposed (7,178) (6,864)
Transfer to reserves 130 10,137
Dividends (4,147) 2,934
Ending balance 61,446 72,641
Legal [Member]    
IfrsStatementLineItems [Line Items]    
Beginning balance 12,846 11,574
Transfer to reserves   1,272
Ending balance 12,846 12,846
Research Development Reserve [Member]    
IfrsStatementLineItems [Line Items]    
Beginning balance 3,397 3,281
Transfer to reserves   116
Ending balance 3,397 3,397
Capital Remuneration [Member]    
IfrsStatementLineItems [Line Items]    
Beginning balance 8,428  
Additional dividends proposed (4,244)  
Transfer to reserves   8,428
Dividends (4,184)  
Ending balance   8,428
Tax Incentives [Member]    
IfrsStatementLineItems [Line Items]    
Beginning balance 1,998 1,677
Transfer to reserves 130 321
Ending balance 2,128 1,998
Profit Retention [Member]    
IfrsStatementLineItems [Line Items]    
Beginning balance 43,038 43,038
Dividends (1,440)  
Ending balance 41,598 43,038
Additional Dividends Proposed [Member]    
IfrsStatementLineItems [Line Items]    
Beginning balance 2,934 6,864
Additional dividends proposed (2,934) (6,864)
Dividends 1,477 2,934
Ending balance $ 1,477 $ 2,934