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Pensions and Post-Employment Benefits - Sensitivity Analysis of Pension and Other Post-Employment Benefits (Detail) $ in Millions | Dec. 31, 2018 MXN ($)
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Actuarial assumption of discount rates [member] |
Disclosure of sensitivity analysis for actuarial assumptions [line items] |
Sensitivity, possible increase in actuarial assumption | $ (3,145)
Sensitivity, possible decrease in actuarial assumption | 3,386
Actuarial assumption of expected rates of salary increases [member] |
Disclosure of sensitivity analysis for actuarial assumptions [line items] |
Sensitivity, possible increase in actuarial assumption | 251
Sensitivity, possible decrease in actuarial assumption | (214)
Actuarial assumption of expected rates of pension increases [member] |
Disclosure of sensitivity analysis for actuarial assumptions [line items] |
Sensitivity, possible increase in actuarial assumption | 1,902
Sensitivity, possible decrease in actuarial assumption | (1,698)
Pension defined benefit plans [member] | Actuarial assumption of discount rates [member] |
Disclosure of sensitivity analysis for actuarial assumptions [line items] |
Sensitivity, possible increase in actuarial assumption | (3,074)
Sensitivity, possible decrease in actuarial assumption | 3,303
Pension defined benefit plans [member] | Actuarial assumption of expected rates of salary increases [member] |
Disclosure of sensitivity analysis for actuarial assumptions [line items] |
Sensitivity, possible increase in actuarial assumption | 205
Sensitivity, possible decrease in actuarial assumption | (177)
Pension defined benefit plans [member] | Actuarial assumption of expected rates of pension increases [member] |
Disclosure of sensitivity analysis for actuarial assumptions [line items] |
Sensitivity, possible increase in actuarial assumption | 1,902
Sensitivity, possible decrease in actuarial assumption | (1,698)
Other post employment benefits [Member] | Actuarial assumption of discount rates [member] |
Disclosure of sensitivity analysis for actuarial assumptions [line items] |
Sensitivity, possible increase in actuarial assumption | (71)
Sensitivity, possible decrease in actuarial assumption | 83
Other post employment benefits [Member] | Actuarial assumption of expected rates of salary increases [member] |
Disclosure of sensitivity analysis for actuarial assumptions [line items] |
Sensitivity, possible increase in actuarial assumption | 46
Sensitivity, possible decrease in actuarial assumption | (37)
Other post employment benefits [Member] | Actuarial assumption of expected rates of pension increases [member] |
Disclosure of sensitivity analysis for actuarial assumptions [line items] |
Sensitivity, possible increase in actuarial assumption | 0
Sensitivity, possible decrease in actuarial assumption | $ 0

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- Definition The increase (decrease) in a defined benefit obligation that would have been caused by a decrease in a significant actuarial assumption that was reasonably possible at the end of the reporting period. [Refer: Actuarial assumptions [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2018-01-01 -Paragraph 145 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2018-03-01&anchor=para_145_a&doctype=Standard -URIDate 2018-03-16 + Details
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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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2018-01-01 -Paragraph 145 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2018-03-01&anchor=para_145_a&doctype=Standard -URIDate 2018-03-16 + Details
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