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Income tax benefit expense (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Other Items Of Statement Of Comprehensive Income      
Current tax  $ 67 $ 13 $ 22
Deferred tax  10 22 (186)
Optional tax revaluation payment 34
Total  income tax - loss (income) 77 35 (130)
Profit before income tax $ 390 $ 159 $ 473
Current tax rate 35.00% 30.00% 30.00%
Result at the tax rate $ 138 $ 48 $ 142
Share of profit from associates and joint ventures (40) (26) (25)
Non-taxable results (1) (5) (38)
Effects of exchange differences and other results associated with the valuation of the currency, net 79 88 93
Effects of valuation of property, plant and equipment, intangible assets and financial assets (269) (156) (202)
Optional tax revaluation payment 34
Special tax, revaluation of property, plant and equipment (1) (169) [1]
Effect of tax rate change in deferred tax (6) 19 37
Adjustment effect for tax inflation  169 74 82
Unrecognized deferred assets 4
Difference in the estimate of previous fiscal year income tax and the income tax statement 1 (7) (86)
Non-deductible cost 3
Other $ (1) $ 2
[1] Relates to Pampa and CPB’s option to adhere, on March 27, 2019, to the optional tax revaluation regime under Title X of Law No. 27,430 on their existing assets as of December 31, 2017.