XML 81 R45.htm IDEA: XBRL DOCUMENT
v3.19.1

Employee Benefits (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2018
Text block [abstract] |
Analysis of the Net Liability and Net Period Cost for Employee Benefit | An analysis of the net liability and net period cost for employee benefits is as follows:
|  | At December 31, |
|  | 2017 |  |  | 2018 |
Liability: |  |  |  |  |  |  |  |
Mexico |  | Ps. | 84,821,197 |  |  | Ps. | 85,517,190 |
Puerto Rico |  |  | 13,962,128 |  |  |  | 13,986,596 |
Europe |  |  | 14,833,840 |  |  |  | 12,705,926 |
Brazil |  |  | 6,276,780 |  |  |  | 5,666,694 |
Ecuador |  |  | 403,194 |  |  |  | 448,608 |
Total |  |  | Ps. 120,297,139 |  |  | Ps. | 118,325,014 |
|  | For the year ended December 31, |
|  | 2016 |  |  | 2017 |  |  | 2018 |
Net period cost (benefit) |  |  |  |  |  |  |  |  |  |  |  |
Mexico |  | Ps. | 12,281,154 |  |  | Ps. | 11,586,065 |  |  | Ps. | 12,046,208 |
Puerto Rico |  |  | 1,058,131 |  |  |  | 776,238 |  |  |  | 686,067 |
Europe |  |  | 226,447 |  |  |  | 385,689 |  |  |  | 619,039 |
Brazil |  |  | 633,159 |  |  |  | 735,855 |  |  |  | 579,432 |
Ecuador |  |  | 41,380 |  |  |  | 152,335 |  |  |  | 58,354 |
Total |  | Ps. | 14,240,271 |  |  | Ps. | 13,636,182 |  |  | Ps. | 13,989,100 |
Summary of Defined Benefit Obligation (DBO) and Plan Assets for the Pension and Other Benefit Obligation Plans | The defined benefit obligation (DBO) and plan assets for the pension and other benefit obligation plans, by country, are as follows:
|  | At December 31 |
|  | 2017 |  |  | 2018 |
|  | DBO |  |  | Plan Assets |  |  | Effect of asset celling |  |  | Net employee benefit liability |  |  | DBO |  |  | Plan Assets |  |  | Effect of asset celling |  |  | Net employee benefit liability |
Mexico |  | Ps. | 266,304,948 |  |  | Ps. | (182,539,376) |  |  | Ps. | — |  |  | Ps. | 83,765,572 |  |  | Ps. | 247,997,060 |  |  | Ps. | (163,404,418) |  |  | Ps. | — |  |  | Ps. | 84,592,642 |
Puerto Rico |  |  | 38,711,695 |  |  |  | ( 24,749,567) |  |  |  | — |  |  |  | 13,962,128 |  |  |  | 35,220,889 |  |  |  | ( 21,234,293) |  |  |  | — |  |  |  | 13,986,596 |
Brazil |  |  | 19,369,664 |  |  |  | ( 20,399,661) |  |  |  | 6,519,560 |  |  |  | 5,489,563 |  |  |  | 18,795,315 |  |  |  | ( 19,032,411) |  |  |  | 5,087,543 |  |  |  | 4,850,447 |
Europe |  |  | 4,554,912 |  |  |  | — |  |  |  | — |  |  |  | 4,554,912 |  |  |  | 4,477,042 |  |  |  | — |  |  |  | — |  |  |  | 4,477,042 |
Total |  | Ps. | 328,941,219 |  |  | Ps. | (227,688,604) |  |  | Ps. | 6,519,560 |  |  | Ps. | 107,772,175 |  |  | Ps. | 306,490,306 |  |  | Ps. | (203,671,122) |  |  | Ps. | 5,087,543 |  |  | Ps. | 107,906,727 |
Summary of the Actuarial Results Generated for the Pension and Retirement Plans as well as the Medical Services | Below is a summary of the actuarial results generated for the pension and retirement plans as well as the medical services in Puerto Rico and Brazil; the pension plans and seniority premiums related to Telmex; the pension plan, the service awards plan and severance in Austria corresponding to the years ended December 31, 2016, 2017 and 2018:
|  | At December 31, 2016 |
|  | DBO |  |  | Plan Assets |  |  | Effect of asset celling |  |  | Net employee benefit |
Balance at the beginning of the year |  | Ps. | 314,049,729 |  |  | Ps. | (212,234,440 | ) |  | Ps. | 4,823,147 |  |  | Ps. | 106,638,436 |
Current service cost |  |  | 4,606,856 |  |  |  |  |  |  |  |  |  |  |  | 4,606,856 |
Interest cost on projected benefit obligation |  |  | 27,275,363 |  |  |  |  |  |  |  |  |  |  |  | 27,275,363 |
Expected return on plan assets |  |  |  |  |  |  | (18,972,042 | ) |  |  |  |  |  |  | (18,972,042 | )
Changes in the asset ceiling during the period and others |  |  |  |  |  |  |  |  |  |  | 875,192 |  |  |  | 875,192 |
Past service costs and other |  |  |  |  |  |  | 165,851 |  |  |  |  |  |  |  | 165,851 |
Actuarial gain for changes in experience |  |  | (28,867 | ) |  |  |  |  |  |  |  |  |  |  | (28,867 | )
Actuarial loss from changes in financial assumptions |  |  | 7,784 |  |  |  |  |  |  |  |  |  |  |  | 7,784 |
Net period cost |  | Ps. | 31,861,136 |  |  | Ps. | (18,806,191 | ) |  | Ps. | 875,192 |  |  | Ps. | 13,930,137 |
Actuarial gain for changes in experience |  |  | (20,976,837 | ) |  |  |  |  |  |  |  |  |  |  | (20,976,837 | )
Actuarial loss from changes in demographic assumptions |  |  | 397,985 |  |  |  |  |  |  |  |  |  |  |  | 397,985 |
Actuarial loss from changes in financial assumptions |  |  | 1,718,189 |  |  |  |  |  |  |  |  |  |  |  | 1,718,189 |
Changes in the asset ceiling during the period and others |  |  |  |  |  |  |  |  |  |  | (754,535 | ) |  |  | (754,535 | )
Return on plan assets greater than discount rate |  |  |  |  |  |  | (4,724,041 | ) |  |  |  |  |  |  | (4,724,041 | )
Recognized in other comprehensive income |  | Ps. | (18,860,663 | ) |  | Ps. | (4,724,041 | ) |  | Ps. | (754,535 | ) |  | Ps. | (24,339,239 | )
Contributions made by plan participants |  |  | 255,760 |  |  |  | (255,760 | ) |  |  |  |  |  |  | — |
Contributions to the pension plan made by the Company |  |  |  |  |  |  | (2,756,519 | ) |  |  |  |  |  |  | (2,756,519 | )
Benefits paid |  |  | (25,694,301 | ) |  |  | 25,517,599 |  |  |  |  |  |  |  | (176,702 | )
Payments to employees |  |  | (525,612 | ) |  |  |  |  |  |  |  |  |  |  | (525,612 | )
Effect of translation |  |  | 12,196,546 |  |  |  | (9,086,269 | ) |  |  | 2,139,414 |  |  |  | 5,249,691 |
Others |  | Ps. | (13,767,607 | ) |  | Ps. | 13,419,051 |  |  | Ps. | 2,139,414 |  |  | Ps. | 1,790,858 |
Balance at the end of the year |  |  | 313,282,595 |  |  |  | (222,345,621 | ) |  |  | 7,083,218 |  |  |  | 98,020,192 |
Less short-term portion |  |  | (152,448 | ) |  |  |  |  |  |  |  |  |  |  | (152,448 | )
Non-current obligation |  | Ps. | 313,130,147 |  |  | Ps. | (222,345,621) |  |  | Ps. | 7,083,218 |  |  | Ps. | 97,867,744 |
|  | At December 31, 2017 |
|  | DBO |  |  | Plan Assets |  |  | Effect of asset celling |  |  | Net employee benefit liability |
Balance at the beginning of the year |  | Ps. | 313,282,595 |  |  | Ps. | (222,345,621 | ) |  | Ps. | 7,083,218 |  |  | Ps. | 98,020,192 |
Current service cost |  |  | 4,285,693 |  |  |  |  |  |  |  |  |  |  |  | 4,285,693 |
Interest cost on projected benefit obligation |  |  | 28,922,385 |  |  |  |  |  |  |  |  |  |  |  | 28,922,385 |
Expected return on plan assets |  |  |  |  |  |  | (20,916,104 | ) |  |  |  |  |  |  | (20,916,104 | )
Changes in the asset ceiling during the period and others |  |  |  |  |  |  |  |  |  |  | 716,330 |  |  |  | 716,330 |
Past service costs and other |  |  |  |  |  |  | 53,032 |  |  |  |  |  |  |  | 53,032 |
Actuarial gain for changes in experience |  |  | (35,145 | ) |  |  |  |  |  |  |  |  |  |  | (35,145 | )
Actuarial gain from changes in demographic assumptions |  |  | (85 | ) |  |  |  |  |  |  |  |  |  |  | (85 | )
Actuarial gain from changes in financial assumptions |  |  | (4,294 | ) |  |  |  |  |  |  |  |  |  |  | (4,294 | )
Net period cost |  | Ps. | 33,168,554 |  |  | Ps. | (20,863,072 | ) |  | Ps. | 716,330 |  |  | Ps. | 13,021,812 |
Actuarial loss for changes in experience |  |  | 11,671,860 |  |  |  |  |  |  |  |  |  |  |  | 11,671,860 |
Actuarial gain from changes in demographic assumptions |  |  | (381,172 | ) |  |  |  |  |  |  |  |  |  |  | (381,172 | )
Actuarial loss from changes in financial assumptions |  |  | 2,438,078 |  |  |  |  |  |  |  |  |  |  |  | 2,438,078 |
Changes in the asset ceiling during the period and others |  |  |  |  |  |  |  |  |  |  | (856,188 | ) |  |  | (856,188 | )
Return on plan assets greater than discount rate |  |  |  |  |  |  | (2,483,430 | ) |  |  |  |  |  |  | (2,483,430 | )
Recognized in other comprehensive income |  | Ps. | 13,728,766 |  |  | Ps. | (2,483,430 | ) |  | Ps. | (856,188 | ) |  | Ps. | 10,389,148 |
Contributions made by plan participants |  |  | 198,713 |  |  |  | (198,713 | ) |  |  |  |  |  |  | — |
Contributions to the pension plan made by the Company |  |  |  |  |  |  | (2,697,621 | ) |  |  |  |  |  |  | (2,697,621 | )
Benefits paid |  |  | (18,841,754 | ) |  |  | 18,841,754 |  |  |  |  |  |  |  | — |
Payments to employees |  |  | (9,843,743 | ) |  |  |  |  |  |  |  |  |  |  | (9,843,743 | )
Effect of translation |  |  | (2,579,506 | ) |  |  | 2,058,099 |  |  |  | (423,800 | ) |  |  | (945,207 | )
Others |  | Ps. | (31,066,290 | ) |  | Ps. | 18,003,519 |  |  | Ps. | (423,800 | ) |  | Ps. | (13,486,571 | )
Balance at the end of the year |  |  | 329,113,625 |  |  |  | (227,688,604 | ) |  |  | 6,519,560 |  |  |  | 107,944,581 |
Less short-term portion |  |  | (172,406 | ) |  |  |  |  |  |  |  |  |  |  | (172,406 | )
Non-current obligation |  | Ps. | 328,941,219 |  |  | Ps. | (227,688,604) |  |  | Ps. | 6,519,560 |  |  | Ps. | 107,772,175 |
|  | At December 31, 2018 |
|  | DBO |  |  | Plan Assests |  |  | Effect of asset celling |  |  | Net employee benefit liability |
Balance at the beginning of the year |  | Ps. | 329,113,625 |  |  | Ps. | (227,688,604 | ) |  | Ps. | 6,519,560 |  |  | Ps. | 107,944,581 |
Current service cost |  |  | 3,322,813 |  |  |  |  |  |  |  |  |  |  |  | 3,322,813 |
Interest cost on projected benefit obligation |  |  | 30,185,257 |  |  |  |  |  |  |  |  |  |  |  | 30,185,257 |
Expected return on plan assets |  |  |  |  |  |  | (20,804,104 | ) |  |  |  |  |  |  | (20,804,104 | )
Changes in the asset ceiling during the period and others |  |  |  |  |  |  |  |  |  |  | 587,373 |  |  |  | 587,373 |
Past service costs and other |  |  |  |  |  |  | 157,765 |  |  |  |  |  |  |  | 157,765 |
Actuarial gain for changes in experience |  |  | (7,222 | ) |  |  |  |  |  |  |  |  |  |  | (7,222 | )
Actuarial loss from changes in demographic assumptions |  |  | 134,625 |  |  |  |  |  |  |  |  |  |  |  | 134,625 |
Actuarial gain from changes in financial assumptions |  |  | (24,890 | ) |  |  |  |  |  |  |  |  |  |  | (24,890 | )
Net period cost |  | Ps. | 33,610,583 |  |  | Ps. | (20,646,339 | ) |  | Ps. | 587,373 |  |  | Ps. | 13,551,617 |
Actuarial gain for changes in experience |  |  | (21,283,470 | ) |  |  |  |  |  |  |  |  |  |  | (21,283,470 | )
Actuarial loss from changes in demographic assumptions |  |  | 68,482 |  |  |  |  |  |  |  |  |  |  |  | 68,482 |
Actuarial gain from changes in financial assumptions |  |  | (1,246,539 | ) |  |  |  |  |  |  |  |  |  |  | (1,246,539 | )
Changes in the asset ceiling during the period and others |  |  |  |  |  |  |  |  |  |  | (1,055,409 | ) |  |  | (1,055,409 | )
Return on plan assets greater than discount rate |  |  |  |  |  |  | 23,503,296 |  |  |  |  |  |  |  | 23,503,296 |
Recognized in other comprehensive income |  | Ps. | (22,461,527 | ) |  | Ps. | 23,503,296 |  |  | Ps. | (1,055,409 | ) |  | Ps. | (13,640 | )
Contributions made by plan participants |  |  | 173,722 |  |  |  | (173,722 | ) |  |  |  |  |  |  | — |
Contributions to the pension plan made by the Company |  |  |  |  |  |  | (1,565,792 | ) |  |  |  |  |  |  | (1,565,792 | )
Benefits paid |  |  | (19,546,541 | ) |  |  | 19,546,541 |  |  |  |  |  |  |  | — |
Payments to employees |  |  | (10,651,938 | ) |  |  |  |  |  |  |  |  |  |  | (10,651,938 | )
Effect of translation |  |  | (3,535,477 | ) |  |  | 3,353,498 |  |  |  | (963,981 | ) |  |  | (1,145,960 | )
Others |  | Ps. | (33,560,234 | ) |  | Ps. | 21,160,525 |  |  | Ps. | (963,981 | ) |  | Ps. | (13,363,690 | )
Balance at the end of the year |  |  | 306,702,447 |  |  |  | (203,671,122 | ) |  |  | 5,087,543 |  |  |  | 108,118,868 |
Less short-term portion |  |  | (212,141 | ) |  |  |  |  |  |  |  |  |  |  | (212,141 | )
Non-current obligation |  | Ps. | 306,490,306 |  |  | Ps. | (203,671,122 | ) |  | Ps. | 5,087,543 |  |  | Ps. | 107,906,727 |
Schedule of Plan Assets Invested | Plan assets are invested in:
|  | At December 31 |
|  | 2017 |  |  | 2018 |
|  | Puerto Rico |  |  | Brazil |  |  | Mexico |  |  | Puerto Rico |  |  | Brazil |  |  | Mexico |
Equity instruments |  |  | 37% |  |  |  | 6% |  |  |  | 61% |  |  |  | 37% |  |  |  | — |  |  |  | 39% |
Debt instruments |  |  | 61% |  |  |  | 88% |  |  |  | 39% |  |  |  | 60% |  |  |  | 94% |  |  |  | 61% |
Others |  |  | 2% |  |  |  | 6% |  |  |  | — |  |  |  | 3% |  |  |  | 6% |  |  |  | — |
|  |  | 100% |  |  |  | 100% |  |  |  | 100% |  |  |  | 100% |  |  |  | 100% |  |  |  | 100% |
Summary of Assumptions Used in Determining the Net Period Cost | The assumptions used in determining the net period cost were as follows:
|  | 2016 |  |  | 2017 |  |  | 2018 |
|  | Puerto Rico |  |  | Brazil |  |  | Mexico |  |  | Europe |  |  | Puerto Rico |  |  | Brazil |  |  | Mexico |  |  | Europe |  |  | Puerto Rico |  |  | Brazil |  |  | Mexico |  |  | Europe |
Discount rate and long- term rate return |  |  | 4.16 | % |  |  | 10.84 | % |  |  | 10.70 | % |  |  | 1.0%, 1.5% & 1.75% |  |  |  | 3.61% |  |  |  | 10.18 | % |  |  | 10.70% |  |  |  | 1.0%, 1.5% & 2.00% |  |  |  | 4.45% |  |  |  | 9.10 | % |  |  | 11.81% |  |  |  | 1.25%, 1.75% & 2.00% |
Rate of future salary increases |  |  | 3.50 | % |  |  | 4.85 | % |  |  | 4.50 | % |  |  | 3.0.%, 3.9% & 4.4% |  |  |  | 2.75% |  |  |  | 4.50 | % |  |  | 4.50% |  |  |  | 3.0.%, 3.5% & 4.4% |  |  |  | 2.75% |  |  |  | 4.00 | % |  |  | 3.55% |  |  |  | 3.0.%, 3.5% & 4.4% |
Percentage of increase in health care costs for the coming year |  |  | 4.20 | % |  |  | 11.35 | % |  |  |  |  |  |  |  |  |  |  | 3.57% |  |  |  | 11.00 | % |  |  |  |  |  |  |  |  |  |  | 3.87% |  |  |  | 10.50 | % |  |  |  |  |  |  |  |
Year to which this level will be maintained |  |  | N/A |  |  |  | 2017 |  |  |  |  |  |  |  |  |  |  |  | N/A |  |  |  | 2028 |  |  |  |  |  |  |  |  |  |  |  | N/A |  |  |  | 2029 |  |  |  |  |  |  |  |  |
Rate of increase of pensions |  |  |  |  |  |  |  |  |  |  | 3.83 | % |  |  | 1.60% |  |  |  |  |  |  |  |  |  |  |  | 3.83% |  |  |  | 1.60% |  |  |  |  |  |  |  |  |  |  |  | 3.47% |  |  |  | 1.60% |
Employee turnover rate* |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.0%-1.88% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.0%-1.72% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.0%-1.51% |
* | Depending on years of service
Summary of Increase (Decrease) Would Have Resulted in the DBO Pension and Other Benefits | The increase (decrease) would have resulted in the DBO pension and other benefits at December 31, 2018 are as follows:
|  | -100 points |  |  | +100 points |
Discount rate |  | Ps. | 37,185,664 |  |  | Ps. | (38,604,684 | )
Health care cost trend rate |  | Ps. | (651,697 | ) |  | Ps. | 761,278 |
Summary of Long-Term Direct Employee Benefits | Long- term direct employee benefits
|  | Balance at December 31, 2016 |  |  |  |  |  |  |  |  | Applications |  |  | Balance at December 31, 2017 |
|  | Effect of translation |  |  | Increase of the year |  |  | Payments |  |  | Reversals |
Long-term direct employee benefits |  | Ps. | 11,251,499 |  |  | Ps. | 795,581 |  |  | Ps. | 771,274 |  |  | Ps. | (2,077,632 | ) |  | Ps. | (582,686 | ) |  | Ps. | 10,158,036 |
|  | Balance at December 31, 2017 |  |  |  |  |  |  |  |  | Applications |  |  | Balance at December 31, 2018 |
|  | Effect of translation |  |  | Increase of the year |  |  | Payments |  |  | Reversals |
Long-term direct employee benefits |  | Ps. | 10,158,036 |  |  | Ps. | (493,795 | ) |  | Ps. | 1,750,831 |  |  | Ps. | (2,079,880 | ) |  | Ps. | (1,223,414 | ) |  | Ps. | 8,111,778 |

X
- Definition Disclosure of actuarial results generated for the pension and retirement plans explanatory. + References No definition available. + Details
Name: | amx_DisclosureOfActuarialResultsGeneratedForThePensionAndRetirementPlansExplanatory
Namespace Prefix: | amx_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition The disclosure of key financial actuarial assumptions. + References No definition available. + Details
Name: | amx_DisclosureOfKeyFinancialActuarialAssumptionsExplanatory
Namespace Prefix: | amx_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition The disclosure of long term direct employee benefits. + References No definition available. + Details
Name: | amx_DisclosureOfLongTermDirectEmployeeBenefitsExplanatory
Namespace Prefix: | amx_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Text block [abstract] + References No definition available. + Details
Name: | amx_TextBlockAbstract
Namespace Prefix: | amx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The disclosure of defined benefit plans. [Refer: Defined benefit plans [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2018-01-01 -Paragraph 138 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2018-03-01&anchor=para_138&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_DisclosureOfDefinedBenefitPlansExplanatory
Namespace Prefix: | ifrs-full_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition The disclosure of the fair value of defined benefit plan assets. [Refer: Plan assets [member]; Defined benefit plans [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2018-01-01 -Paragraph 142 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2018-03-01&anchor=para_142&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_DisclosureOfFairValueOfPlanAssetsExplanatory
Namespace Prefix: | ifrs-full_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition The disclosure of a net defined benefit liability (asset). [Refer: Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2018-01-01 -Paragraph 140 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2018-03-01&anchor=para_140_a&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_DisclosureOfNetDefinedBenefitLiabilityAssetExplanatory
Namespace Prefix: | ifrs-full_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition The disclosure of a sensitivity analysis for significant actuarial assumptions used to determine the present value of a defined benefit obligation. [Refer: Actuarial assumptions [member]; Defined benefit obligation, at present value] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2018-01-01 -Paragraph 145 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2018-03-01&anchor=para_145&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_DisclosureOfSensitivityAnalysisForActuarialAssumptionsExplanatory
Namespace Prefix: | ifrs-full_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration