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Income tax (Details 5)
$ in Millions
Jun. 30, 2020
ARS ($)
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]  
Total cumulative tax loss carry-forwards $ 12,579
Do Not Expire [Member]  
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]  
Total cumulative tax loss carry-forwards 3,784
Argentina | 2016 [Member] | 2021 [Member]  
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]  
Total cumulative tax loss carry-forwards 3
Argentina | 2017 [Member] | 2022 [Member]  
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]  
Total cumulative tax loss carry-forwards 11
Argentina | 2018 [Member] | 2023 [Member]  
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]  
Total cumulative tax loss carry-forwards 2,785
Argentina | 2019 [Member] | 2024 [Member]  
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]  
Total cumulative tax loss carry-forwards 1,186
Bolivia | 2020 [Member] | 2025 [Member]  
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]  
Total cumulative tax loss carry-forwards 4,809
Brazil | 2011 To 2019 [Member] | Do Not Expire [Member]  
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]  
Total cumulative tax loss carry-forwards $ 1