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Capital structure and financing - C.1. Share capital and other equity reserves (Details)
$ / shares in Units, $ in Millions
 12 Months Ended
May 23, 2022
shareRight
$ / shares
shares
May 23, 2022
shareRight
kr / shares
shares
May 18, 2022
USD ($)
shares
Dec. 31, 2022
USD ($)
$ / shares
shares
Dec. 31, 2021
USD ($)
$ / shares
shares
Dec. 31, 2020
USD ($)
shares
Feb. 28, 2022
USD ($)
$ / shares
shares
Dec. 13, 2021
USD ($)
$ / shares
shares
Dec. 31, 2019
USD ($)
shares
Disclosure of reserves within equity [line items]                  
Authorized and registered share capital (in shares) | shares       200,000,000 133,333,200        
Subscribed and fully paid up share capital (in shares) | shares       172,096,305 101,739,217        
Par value per share (usd per share) | $ / shares       $ 1.50 $ 1.50   $ 1.50 $ 1.50  
Share capital       $ 258 $ 153        
Share premium       1,085 476        
Share capital and premium       1,343 628 [1]        
Share capital, increase             $ 300 $ 300  
Number of shares authorised, increase | shares             200,000,000 200,000,000,000,000  
Effects of rights offering (in shares) | shares     70,357,088            
Subscribed by exercise of basic subscription rights (in shares) | shares     68,822,675            
Allotment to investors who subscribed over subscription privileges (in shares) | shares     1,534,413            
Effects of rights offering [2]       717          
Underwriting commissions and other offering expenses     $ 28            
Equity       3,634 2,740 [1] $ 2,274     $ 2,680
Other Reserves [Roll Forward]                  
Other equity reserves, beginning balance [1]       (594)          
Share based compensation [3]       26 19 24      
Issuance of shares       1 1 1      
Remeasurements of post-employment benefit obligations       (2) 1 (2)      
Cash flow hedge reserve movement       9 17 (1)      
Currency translation movement       19 (51) (19)      
Other equity reserves, ending balance       (559) (594) [1]        
Share Right                  
Disclosure of reserves within equity [line items]                  
Number of subscription rights for each share (in share rights) | shareRight 1 1              
Number of subscription rights required for share issuance (in shares) | shares 10 10              
Number of shares issued in exchange for subscription rights (in shares) | shares 7 7              
Subscription price (in dollars per share) | $ / shares $ 10.61                
Swedish Depositary Receipts (SDRs)                  
Disclosure of reserves within equity [line items]                  
Number of subscription rights for each share (in share rights) | shareRight 1 1              
Number of subscription rights required for share issuance (in shares) | shares 10 10              
Number of shares issued in exchange for subscription rights (in shares) | shares 7 7              
Subscription price (in dollars per share) | kr / shares   kr 106              
Legal reserve                  
Other Reserves [Roll Forward]                  
Other equity reserves, beginning balance       16 16 16      
Other equity reserves, ending balance       16 16 16      
Equity settled transaction reserve                  
Other Reserves [Roll Forward]                  
Other equity reserves, beginning balance       43 50 52      
Share based compensation       25 18 24      
Issuance of shares       (17) (25) (26)      
Other equity reserves, ending balance       51 43 50      
Hedge reserve                  
Other Reserves [Roll Forward]                  
Other equity reserves, beginning balance       (3) (19) (18)      
Cash flow hedge reserve movement       8 14 (1)      
Currency translation movement         1 0      
Other equity reserves, ending balance       5 (3) (19)      
Currency translation reserve                  
Other Reserves [Roll Forward]                  
Other equity reserves, beginning balance       (646) (605) (593)      
Currency translation movement       20 (41) (12)      
Other equity reserves, ending balance       (626) (646) (605)      
Pension obligation reserve                  
Other Reserves [Roll Forward]                  
Other equity reserves, beginning balance       (3) (4) (2)      
Remeasurements of post-employment benefit obligations       (2) 2 (2)      
Cash flow hedge reserve movement       1          
Other equity reserves, ending balance       (4) (3) (4)      
Total                  
Disclosure of reserves within equity [line items]                  
Effects of rights offering     $ 717 717 [2]          
Equity       3,605 2,583 2,059     $ 2,409
Other Reserves [Roll Forward]                  
Share based compensation [3]       25 18 24      
Issuance of shares       $ 1 $ 1 $ 1      
Share capital                  
Disclosure of reserves within equity [line items]                  
Effects of rights offering (in shares) | shares [2],[4]       70,357,000          
Effects of rights offering [2],[5]       $ 106          
Number of shares (in shares) | shares [4]       172,096,305 101,739,217 101,739,000     101,739,000
Equity [5]       $ 258 $ 153 $ 153     $ 153
Share premium                  
Disclosure of reserves within equity [line items]                  
Effects of rights offering [2],[5]       611          
Equity [5]       1,085 476 478     480
Other Reserves [Roll Forward]                  
Issuance of shares [5]       (2) (2) (2)      
Other reserves                  
Disclosure of reserves within equity [line items]                  
Equity [6]       (559) (594) (562)     $ (544)
Other Reserves [Roll Forward]                  
Other equity reserves, beginning balance       (593) (562) (544)      
Share based compensation [3],[6]       25 18 24      
Issuance of shares [6]       (17) (25) (26)      
Remeasurements of post-employment benefit obligations       (2) 2 (2)      
Cash flow hedge reserve movement       9 14 (1)      
Currency translation movement       20 (41) (12)      
Other equity reserves, ending balance       $ (559) $ (593) $ (562)      
[1] Restated after the finalization of the Guatemala purchase accounting. See note A.1.2. for further details.
[2] See note C.1.
[3] Share-based compensation – see note C.1.
[4] The authorized share capital amounts to $300 million divided into 200 million shares with a par value of $1.50 each following the extraordinary general meeting held on February 28, 2022.
[5] Share capital and share premium – see note C.1.
[6] Other reserves – see note C.1.