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Property, Plant and Equipment (Information) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disclosure of detailed information about property, plant and equipment [line items]      
Balance at beginning of year $ 5,550    
IFRS 16 initial implementation     $ 339
Reversal of impairment (9) $ 0 (10)
Balance at end of year 5,754 5,550  
Depreciated balance at end of year 5,754 5,550  
Gross [Member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance at beginning of year 12,017 11,194  
Additions in respect of business combinations 125    
Additions 642 675  
Disposals (73) (69)  
Exit from consolidation (33) (26)  
Translation differences (187) 243  
Balance at end of year 12,491 12,017 11,194
Depreciated balance at end of year 12,491 12,017 11,194
Accumulated depreciation [Member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance at beginning of year (6,467) (5,863)  
Depreciation 454 461  
Reversal of impairment 6    
Disposals 62 59  
Impairment   (85)  
Exit from consolidation (22) (10)  
Translation differences (94) 127  
Balance at end of year (6,737) (6,467) (5,863)
Depreciated balance at end of year (6,737) (6,467) (5,863)
Land and buildings [Member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance at beginning of year 389    
Balance at end of year 605 389  
Depreciated balance at end of year 605 389  
Land and buildings [Member] | Gross [Member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance at beginning of year 880 804  
Additions in respect of business combinations 85    
Additions 193 63  
Disposals (2) (7)  
Exit from consolidation (9) (14)  
Translation differences (40) 34  
Balance at end of year 1,107 880 804
Depreciated balance at end of year 1,107 880 804
Land and buildings [Member] | Accumulated depreciation [Member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance at beginning of year (491) (445)  
Depreciation 30 35  
Reversal of impairment 0    
Disposals 5 6  
Impairment   0  
Exit from consolidation (3) (2)  
Translation differences (11) 19  
Balance at end of year (502) (491) (445)
Depreciated balance at end of year (502) (491) (445)
Technical equipment and machinery [Member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance at beginning of year 3,119    
Balance at end of year 3,254 3,119  
Depreciated balance at end of year 3,254 3,119  
Technical equipment and machinery [Member] | Gross [Member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance at beginning of year 7,419 6,865  
Additions in respect of business combinations 20    
Additions 382 467  
Disposals (44) (34)  
Exit from consolidation (21) (5)  
Translation differences (92) 126  
Balance at end of year 7,664 7,419 6,865
Depreciated balance at end of year 7,664 7,419 6,865
Technical equipment and machinery [Member] | Accumulated depreciation [Member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance at beginning of year (4,300) (3,950)  
Depreciation 227 246  
Reversal of impairment (6)    
Disposals 34 31  
Impairment   58  
Exit from consolidation (19) (4)  
Translation differences (58) 81  
Balance at end of year (4,410) (4,300) (3,950)
Depreciated balance at end of year (4,410) (4,300) (3,950)
Dikes and evaporating ponds [Member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance at beginning of year 678    
Balance at end of year 668 678  
Depreciated balance at end of year 668 678  
Dikes and evaporating ponds [Member] | Gross [Member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance at beginning of year 1,441 1,392  
Additions in respect of business combinations 0    
Additions 51 21  
Disposals (1) 0 [1]  
Exit from consolidation 0 0 [1]  
Translation differences (26) 28  
Balance at end of year 1,465 1,441 1,392
Depreciated balance at end of year 1,465 1,441 1,392
Dikes and evaporating ponds [Member] | Accumulated depreciation [Member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance at beginning of year (763) (666)  
Depreciation 55 47  
Reversal of impairment 0    
Disposals 0 0  
Impairment   27  
Exit from consolidation 0 0  
Translation differences (21) 23  
Balance at end of year (797) (763) (666)
Depreciated balance at end of year (797) (763) (666)
Plants under construction [Member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance at beginning of year [1] 778    
Balance at end of year [1] 664 778  
Depreciated balance at end of year [1] 664 778  
Plants under construction [Member] | Gross [Member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance at beginning of year [1] 778 765  
Additions in respect of business combinations [1] 9    
Additions [1] (99) (24)  
Disposals [1] 0    
Exit from consolidation [1] 0    
Translation differences [1] (24) 37  
Balance at end of year [1] 664 778 765
Depreciated balance at end of year [1] 664 778 765
Plants under construction [Member] | Accumulated depreciation [Member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance at beginning of year [1] 0 0  
Depreciation [1] 0 0  
Reversal of impairment [1] 0    
Disposals [1] 0 0  
Impairment [1]   0  
Exit from consolidation [1] 0 0  
Translation differences [1] 0 0  
Balance at end of year [1] 0 0 0
Depreciated balance at end of year [1] 0 0 0
Other [Member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance at beginning of year 186    
Balance at end of year 192 186  
Depreciated balance at end of year 192 186  
Other [Member] | Gross [Member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance at beginning of year 1,003 945  
Additions in respect of business combinations 2    
Additions 78 68  
Disposals (6) (7)  
Exit from consolidation (1) (6)  
Translation differences (3) 3  
Balance at end of year 1,073 1,003 945
Depreciated balance at end of year 1,073 1,003 945
Other [Member] | Accumulated depreciation [Member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance at beginning of year (817) (760)  
Depreciation 71 66  
Reversal of impairment 0    
Disposals 4 7  
Impairment   0  
Exit from consolidation 0 (4)  
Translation differences (3) 2  
Balance at end of year (881) (817) (760)
Depreciated balance at end of year (881) (817) (760)
Right of use assets [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance at beginning of year 400    
Balance at end of year 371 400  
Depreciated balance at end of year 371 400  
Right of use assets [member] | Gross [Member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance at beginning of year 496 423  
Additions in respect of business combinations 9    
Additions 37 80  
Disposals (20) (21)  
Exit from consolidation (2) (1)  
Translation differences (2) 15  
Balance at end of year 518 496 423
Depreciated balance at end of year 518 496 423
Right of use assets [member] | Accumulated depreciation [Member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Balance at beginning of year (96) (42)  
Depreciation 71 67  
Reversal of impairment 0    
Disposals 19 15  
Impairment   0  
Exit from consolidation 0 0  
Translation differences (1) 2  
Balance at end of year (147) (96) (42)
Depreciated balance at end of year $ (147) $ (96) $ (42)
[1] The additions are presented net of items for which construction has been completed and accordingly were reclassified to other categories in the “property, plant and equipment” section.