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Schedule of class of assets (Details) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
DisclosureIntangibleAssetsLineItems [Line Items]    
Balance at December 31, 2020 $ 3,025 $ 14,948
Beginning balance 3,254 15,521
Addition 982 71
Capitalized borrowing costs 5 2
Write-offs (12) (7)
Transfers (11) (41)
Signature Bonuses Transfers [1] (840)  
Amortization (37) (32)
Impairment recognition (1)  
Cumulative  translation adjustment 143 580
Balance at June 30, 2021 3,254 15,521
Carrying amount1 [member]    
DisclosureIntangibleAssetsLineItems [Line Items]    
Balance at December 31, 2020 4,087  
Beginning balance 4,415 16,712
Balance at June 30, 2021 4,415 16,712
Accumulated depreciation, amortisation and impairment [member]    
DisclosureIntangibleAssetsLineItems [Line Items]    
Balance at December 31, 2020 (1,062)  
Beginning balance (1,161) (1,191)
Balance at June 30, 2021 (1,161) (1,191)
Service concession rights [member]    
DisclosureIntangibleAssetsLineItems [Line Items]    
Balance at December 31, 2020 [2] 2,695 14,714
Beginning balance [2] 2,851 15,243
Addition [2] 895 12
Capitalized borrowing costs [2]
Write-offs [2] (11) (7)
Transfers [2] (10) (43)
Signature Bonuses Transfers [1],[2] (840)  
Amortization [2] (2) (4)
Impairment recognition [2]  
Cumulative  translation adjustment [2] 124 571
Balance at June 30, 2021 [2] 2,851 15,243
Service concession rights [member] | Carrying amount1 [member]    
DisclosureIntangibleAssetsLineItems [Line Items]    
Balance at December 31, 2020 2,744  
Beginning balance 2,905 15,336
Balance at June 30, 2021 2,905 15,336
Service concession rights [member] | Accumulated depreciation, amortisation and impairment [member]    
DisclosureIntangibleAssetsLineItems [Line Items]    
Balance at December 31, 2020 (49)  
Beginning balance (54) (93)
Balance at June 30, 2021 (54) (93)
Software licenses [member]    
DisclosureIntangibleAssetsLineItems [Line Items]    
Balance at December 31, 2020 308 210
Beginning balance 380 253
Addition 87 59
Capitalized borrowing costs 5 2
Write-offs (1)
Transfers (1) 2
Signature Bonuses Transfers [1]  
Amortization (35) (28)
Impairment recognition (1)  
Cumulative  translation adjustment 18 8
Balance at June 30, 2021 $ 380 253
Estimated useful life in years 5 years  
Software licenses [member] | Carrying amount1 [member]    
DisclosureIntangibleAssetsLineItems [Line Items]    
Balance at December 31, 2020 $ 1,321  
Beginning balance 1,487 1,351
Balance at June 30, 2021 1,487 1,351
Software licenses [member] | Accumulated depreciation, amortisation and impairment [member]    
DisclosureIntangibleAssetsLineItems [Line Items]    
Balance at December 31, 2020 (1,013)  
Beginning balance (1,107) (1,098)
Balance at June 30, 2021 (1,107) (1,098)
Goodwill [member]    
DisclosureIntangibleAssetsLineItems [Line Items]    
Balance at December 31, 2020 22 24
Beginning balance 23 25
Addition
Capitalized borrowing costs
Write-offs
Transfers
Signature Bonuses Transfers [1]  
Amortization
Impairment recognition  
Cumulative  translation adjustment 1 1
Balance at June 30, 2021 23 25
Goodwill [member] | Carrying amount1 [member]    
DisclosureIntangibleAssetsLineItems [Line Items]    
Balance at December 31, 2020 22  
Beginning balance 23 25
Balance at June 30, 2021 $ 23 $ 25
[1] Transfer to PP&E relating to Sépia and Atapu.
[2] It comprises mainly signature bonuses (amounts paid in concession contracts for oil or natural gas exploration and production sharing), in addition to public service concessions, trademarks and patents and others.