XML 189 R102.htm IDEA: XBRL DOCUMENT v3.20.4
Provisions and other liabilities - Expected timing of cash outflows (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Disclosure of other provisions and other liabilities [line items]    
Total provision $ 22,380 $ 19,163
KrasGeoNaC [member]    
Disclosure of other provisions and other liabilities [line items]    
Contingent consideration $ 145  
Proportion of voting rights held in associate 49.00%  
2021 - 2025 [member]    
Disclosure of other provisions and other liabilities [line items]    
Total provision $ 5,080  
2026 - 2030 [Member]    
Disclosure of other provisions and other liabilities [line items]    
Total provision 1,900  
2031 - 2035 [Member]    
Disclosure of other provisions and other liabilities [line items]    
Total provision 5,895  
2036 - 2040 [Member]    
Disclosure of other provisions and other liabilities [line items]    
Total provision 2,598  
Thereafter [Member]    
Disclosure of other provisions and other liabilities [line items]    
Total provision 6,908  
Asset retirement obligations [Member]    
Disclosure of other provisions and other liabilities [line items]    
Total provision 17,292 $ 14,719
Asset retirement obligations [Member] | 2021 - 2025 [member]    
Disclosure of other provisions and other liabilities [line items]    
Total provision 883  
Asset retirement obligations [Member] | 2026 - 2030 [Member]    
Disclosure of other provisions and other liabilities [line items]    
Total provision 1,634  
Asset retirement obligations [Member] | 2031 - 2035 [Member]    
Disclosure of other provisions and other liabilities [line items]    
Total provision 5,716  
Asset retirement obligations [Member] | 2036 - 2040 [Member]    
Disclosure of other provisions and other liabilities [line items]    
Total provision 2,557  
Asset retirement obligations [Member] | Thereafter [Member]    
Disclosure of other provisions and other liabilities [line items]    
Total provision 6,502  
Other provisions, including claims and litigations [Member]    
Disclosure of other provisions and other liabilities [line items]    
Total provision 5,089  
Other provisions, including claims and litigations [Member] | 2021 - 2025 [member]    
Disclosure of other provisions and other liabilities [line items]    
Total provision 4,197  
Other provisions, including claims and litigations [Member] | 2026 - 2030 [Member]    
Disclosure of other provisions and other liabilities [line items]    
Total provision 266  
Other provisions, including claims and litigations [Member] | 2031 - 2035 [Member]    
Disclosure of other provisions and other liabilities [line items]    
Total provision 178  
Other provisions, including claims and litigations [Member] | 2036 - 2040 [Member]    
Disclosure of other provisions and other liabilities [line items]    
Total provision 41  
Other provisions, including claims and litigations [Member] | Thereafter [Member]    
Disclosure of other provisions and other liabilities [line items]    
Total provision 406  
Onerous contracts, cancellation fees and other [Member]    
Disclosure of other provisions and other liabilities [line items]    
Total provision $ 166