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Income Tax - Summary of Tax Loss Carryforwards (Detail)
$ in Millions
 12 Months Ended
Dec. 31, 2020
ARS ($)
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]  
Date of the initial maturity 2021
Date of expiration 2025
Argentina [member]  
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]  
Amount $ 82,601
Tax loss carryforwards at the expected recovery date [member] | Argentina [member] | 2020 Expiration [member]  
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]  
Date of the initial maturity 2016
Date of expiration 2021
Jurisdiction Argentina
Amount $ 466
Tax loss carryforwards at the expected recovery date [member] | Argentina [member] | 2021 Expiration [member]  
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]  
Date of the initial maturity 2017
Date of expiration 2022
Jurisdiction Argentina
Amount $ 499
Tax loss carryforwards at the expected recovery date [member] | Argentina [member] | 2022 expiration [Member]  
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]  
Date of the initial maturity 2018
Date of expiration 2023
Jurisdiction Argentina
Amount $ 24,190
Tax loss carryforwards at the expected recovery date [member] | Argentina [member] | 2023 expiration [Member]  
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]  
Date of the initial maturity 2019
Date of expiration 2024
Jurisdiction Argentina
Amount $ 21,948
Tax loss carryforwards at the expected recovery date [member] | Argentina [member] | 2024 expiration [Member]  
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]  
Date of the initial maturity 2020
Date of expiration 2025
Jurisdiction Argentina
Amount $ 35,498