XML 164 R138.htm IDEA: XBRL DOCUMENT v3.21.1
31 Benefit plans (Details 2) - ARS ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Benefit Plans      
Cost $ 161 $ 150 $ 69
Interest 316 207 166
Actuarial results - Other comprehensive (income) loss (108) 10 12
Benefit plan charge $ 369 $ 367 $ 247