v3.26.1
Earnings per share (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Earnings per share [line items]          
Payments to acquire or redeem entity's shares $ 0 $ 1,063 $ 562 $ 2,910  
Profit (loss), attributable to owners of parent 3,911 1,629 7,753 2,316  
Adjustment to profit (loss) for preference share dividends 1 1 1 1  
Loss (gain) on redemption of other changes, equity, net of tax 65 0 65 0  
Profit (loss), attributable to ordinary equity holders of parent entity $ 3,845 $ 1,628 $ 7,687 $ 2,315  
Ordinary shares [member]          
Earnings per share [line items]          
Weighted average number of ordinary shares outstanding 15,522,233,000 15,645,561,000 15,496,928,000 15,711,554,000  
Adjusted weighted average number of ordinary shares outstanding 15,667,335,000 15,854,588,000 15,691,289,000 16,026,670,000  
Number Of Shares Outstanding And Reserved For Future Issuance 15,546,713,000 15,596,112,000 15,546,713,000 15,596,112,000  
Number of shares issued 15,702,899,365   15,702,899,365   15,628,880,285
Treasury stock, shares 783,413,629   783,413,629   857,432,709
ADS [Member]          
Earnings per share [line items]          
Weighted average number of ordinary shares outstanding 2,587,038,000 2,607,593,000 2,582,821,000 2,618,592,000  
Adjusted weighted average number of ordinary shares outstanding 2,611,222,000 2,642,431,000 2,615,214,000 2,671,111,000  
Number Of Shares Outstanding And Reserved For Future Issuance 2,591,118,000 2,599,352,000 2,591,118,000 2,599,352,000