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Litigations - Changes (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Changes in provision    
Balance at the beginning $ 4,522  
Balance at the end 4,580 $ 4,522
Current liabilities 1,045 1,664
Non-current liabilities 3,419 4,113
Legal proceedings reserved 402 423
Legal proceedings guaranteed 463 487
Provisions for litigation (note 28)    
Changes in provision    
Balance at the beginning 1,091 1,462
Additions and reversals, net 98 73
Payments (94) (112)
Indexation and interest 87 (28)
Translation adjustment (77) (304)
Acquisition of NLC 10  
Discontinued operations (10)  
Balance at the end 1,105 1,091
Current liabilities 93 87
Non-current liabilities 1,012 1,004
Provisions 1,105  
Tax litigation    
Changes in provision    
Balance at the beginning 485 696
Additions and reversals, net 4 29
Payments (10) (23)
Indexation and interest 10 (85)
Translation adjustment (33) (132)
Balance at the end 456 485
Current liabilities 14  
Non-current liabilities 442  
Provisions 456  
Civil litigation    
Changes in provision    
Balance at the beginning 260 300
Additions and reversals, net 19 26
Payments (22) (30)
Indexation and interest 45 30
Translation adjustment (18) (66)
Acquisition of NLC 2  
Discontinued operations (2)  
Balance at the end 284 260
Current liabilities 22  
Non-current liabilities 262  
Provisions 284  
Labor litigation    
Changes in provision    
Balance at the beginning 335 455
Additions and reversals, net 74 16
Payments (57) (59)
Indexation and interest 32 26
Translation adjustment (26) (103)
Acquisition of NLC 8  
Discontinued operations (8)  
Balance at the end 358 335
Current liabilities 56  
Non-current liabilities 302  
Provisions 358  
Environmental litigation    
Changes in provision    
Balance at the beginning 11 11
Additions and reversals, net 1 2
Payments (5)  
Indexation and interest 0 1
Translation adjustment   (3)
Balance at the end 7 $ 11
Current liabilities 1  
Non-current liabilities 6  
Provisions $ 7