v3.25.2
Debt - Narrative (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2024
USD ($)
program
Dec. 31, 2023
USD ($)
Disclosure of detailed information about borrowings [line items]    
CP programmes | program 2  
Debt issued $ 77,078 $ 81,541
Fair value of debt excluding finance lease liabilities $ 44,119 50,866
Long term commercial paper programme    
Disclosure of detailed information about borrowings [line items]    
Debt maturity period, long-term debt 397 days  
Maximum issuance of debt, long-term $ 10,000  
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 $ 0 0
Frequency of updates to borrowings 3 years  
Committed credit facility, due in 2023    
Disclosure of detailed information about borrowings [line items]    
Maximum borrowing capacity $ 1,920  
Committed credit facility, due In 2026    
Disclosure of detailed information about borrowings [line items]    
Maximum borrowing capacity $ 8,000 $ 8,000