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Leases - Non-current debt maturity profile (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Lease liabilities [abstract]      
Total repayment of non-current lease liability $ 2,449 [1] $ 3,220 [1] $ 3,191
Year 2 and 3 [member]      
Lease liabilities [abstract]      
Total repayment of non-current lease liability 1,164 1,513  
Year 4 and 5 [member]      
Lease liabilities [abstract]      
Total repayment of non-current lease liability 586 748  
After 5 years [member]      
Lease liabilities [abstract]      
Total repayment of non-current lease liability $ 699 $ 959  
[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.