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Leases - Information related to lease payments and lease liabilities (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Lease liabilities [abstract]      
Lease interest $ 93 $ 104 $ 126
Current leases, presented within current Finance debt 1,113 [1] 1,186 [1] 1,148
Noncurrent Leases 2,449 [1] 3,220 [1] 3,191
Lease liabilities [member]      
Lease liabilities [abstract]      
Liabilities arising from financing activities, beginning balance 4,406 4,339  
New leases, Including remeasurements and cancelations 476 1,349  
Gross lease payments (1,350) (1,415)  
Lease interest 91 102  
Lease repayments (1,259) (1,313)  
Foreign currency translation effects (61) 31  
Liabilities arising from financing activities, ending balance $ 3,562 $ 4,406 $ 4,339
[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.