v3.25.4
Debt - Narrative (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2025
USD ($)
program
Sep. 30, 2025
USD ($)
banks
Dec. 31, 2024
USD ($)
Disclosure of detailed information about borrowings [line items]      
CP programmes | program 2    
Debt issued $ 75,643   $ 77,078
Fair value of debt excluding finance lease liabilities 43,142   44,119
Short term commercial paper programme      
Disclosure of detailed information about borrowings [line items]      
Maximum issuance of debt, short-term $ 10,000    
Short term commercial paper programme | Bottom of range      
Disclosure of detailed information about borrowings [line items]      
Debt maturity period, long-term debt 183 days    
Short term commercial paper programme | Top of range      
Disclosure of detailed information about borrowings [line items]      
Debt maturity period, long-term debt 364 days    
EMTN      
Disclosure of detailed information about borrowings [line items]      
Debt issued $ 0   0
US shelf registration      
Disclosure of detailed information about borrowings [line items]      
Debt issued $ 2,350   0
Frequency of updates to borrowings 3 years    
Committed credit facility, due In 2026      
Disclosure of detailed information about borrowings [line items]      
Number of banks | banks   26  
Maximum borrowing capacity   $ 8,000 $ 8,000