XML 172 R116.htm IDEA: XBRL DOCUMENT v3.20.1

Employee Benefits - Schedule of Plan Assets Invested (Detail)	Dec. 31, 2019	Dec. 31, 2018
Puerto Rico [member]
Disclosure of fair value of plan assets [line items]
Equity instruments	41.00%	37.00%
Debt instruments	58.00%	60.00%
Others	1.00%	3.00%
Total	100.00%	100.00%
Brazil [member]
Disclosure of fair value of plan assets [line items]
Debt instruments	94.00%	94.00%
Others	6.00%	6.00%
Total	100.00%	100.00%
Mexico [member]
Disclosure of fair value of plan assets [line items]
Equity instruments	36.00%	39.00%
Debt instruments	64.00%	61.00%
Total	100.00%	100.00%

X

- Definition

Consolidated rate of contributed to fair value of plan assets.

+ References

No definition available.

+ Details

Name:	amx_ConsolidatedRateOfContributedToFairValueOfPlanAssets
Namespace Prefix:	amx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Debt instruments rate of contributed to fair value of plan assets.

+ References

No definition available.

+ Details

Name:	amx_DebtInstrumentsRateOfContributedToFairValueOfPlanAssets
Namespace Prefix:	amx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Equity instruments rate of contributed to fair value of plan assets.

+ References

No definition available.

+ Details

Name:	amx_EquityInstrumentsRateOfContributedToFairValueOfPlanAssets
Namespace Prefix:	amx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Other assets rate of contributed to fair value of plan assets.

+ References

No definition available.

+ Details

Name:	amx_OtherAssetsRateOfContributedToFairValueOfPlanAssets
Namespace Prefix:	amx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

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.

+ References

No definition available.

+ Details

Name:	ifrs-full_DisclosureOfFairValueOfPlanAssetsLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	ifrs-full_GeographicalAreasAxis=country_PR
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_GeographicalAreasAxis=country_BR
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_GeographicalAreasAxis=country_MX
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: