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Finance debt - Non-current debt maturity profile (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Non-current finance debt maturity profile [abstract]      
Total repayment of non-current finance debt $ 27,404 [1] $ 29,118 [1] $ 21,754
Weighted average [member]      
Non-current finance debt maturity profile [abstract]      
Weighted average maturity (years) 10 10  
Weighted average [member] | Interest Rate Non Current Debt [Member]      
Non-current finance debt maturity profile [abstract]      
Weighted average annual interest rate (%) 3.33% 3.38%  
Year 2 and 3 [member]      
Non-current finance debt maturity profile [abstract]      
Total repayment of non-current finance debt $ 5,015 $ 3,705  
Year 4 and 5 [member]      
Non-current finance debt maturity profile [abstract]      
Total repayment of non-current finance debt 4,731 4,927  
After 5 years [member]      
Non-current finance debt maturity profile [abstract]      
Total repayment of non-current finance debt $ 17,659 $ 20,485  
[1]
1) Restated 1 January 2020 and 31 December
 
2020 figures due to a policy change affecting ARO,
 
see note 2 Significant accounting policies
and note 21 Provisions and other liabilities.