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Post-employment Benefits - Sensitivity (Details) - MXN ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Sensitivity analysis
Discount rate (as a percent)	7.02%	8.37%
Discount rate
Sensitivity analysis
Decrease in actuarial assumption (in basis points)	0.50%	50.00%
Increase in actuarial assumption	$ 3,037,398	$ 2,601,278

X

- Definition

The discount rate used as the significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit obligation, at present value; Actuarial assumptions [member]]

+ References

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Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

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- Definition

The increase (decrease) in a defined benefit obligation that would have been caused by an increase in a significant actuarial assumption that was reasonably possible at the end of the reporting period. [Refer: Actuarial assumptions [member]]

+ References

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- Definition

The reasonably possible percentage of the decrease in the actuarial assumption used to determine the present value of defined benefit obligation. [Refer: Actuarial assumptions [member]]

+ References

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