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Employee Benefits - Employee Benefit Expenses (Details) - MXN ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Classes of employee benefits expense [abstract]      
Wages and salaries $ 70,238 $ 68,312 $ 64,776
Social security costs 11,737 11,595 11,494
Employee profit sharing 2,035 1,112 1,205
Post-employment benefits 1,176 1,002 795
Share-based payments 854 575 200
Termination benefits 259 201 169
Employee benefits expense $ 86,299 $ 82,797 $ 78,639