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Schedule of adjustments to reconcile net profit (loss) to cash flows generated by operating activities (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Statement Of Cash Flows Complementary Information      
Income tax $ 77 $ 35 $ (130)
Accrued interest 141 132 110
Depreciations and amortizations 205 205 186
Share of profit from joint ventures and associates (117) (85) (101)
Results from property, plant and equipment sale and decreases (1) 5
Result from the sale of intangible assets (2)
Impairment of property, plant and equipment, intangible assets and inventories 4 139 62
Impairment of financial assets 2 9 (2)
Result from measurement at present value 1 (2) (55)
Changes in the fair value of financial instruments 24 (19) (88)
Net exchange differences (3) (14) 6
Results for the repurchase of corporate bonds (38) (25)
Constitution of allowances, net (3) 4
Provision for contingecies 3 5 4
Provision for environmental remediation 15
Recovery of tax charges (2)    
Accrual of defined benefit plans 11 11 11
Dividends received (1) (1)
Compensation agreements  2 1 (1)
Other 5 5 (8)
Adjustments to reconcile net profit to cash flows generated by operating activities $ 365 $ 380 $ (23)