XML 204 R123.htm IDEA: XBRL DOCUMENT v3.8.0.1

Shareholders' Equity - Additional Information (Detail) - MXN ($) $ / shares in Units, $ in Thousands						12 Months Ended
	Nov. 13, 2017	Jul. 17, 2017	Apr. 05, 2017	Oct. 08, 2016	Apr. 18, 2016	Dec. 31, 2017	Dec. 31, 2016	Jan. 31, 2013
Disclosure of classes of share capital [line items]
Capital requirements						$ 362,873
Number of shares issued						95,489,724,196
Number of shares outstanding						66,069,035,539	65,798,000,000
Number of treasury shares held						29,420,688,657	29,691,724,196
Merger transaction description						any transaction representing 20% or more of the Company’s consolidated assets
Legal reserve						$ 358,440	$ 358,440
Amount of Mexican withholding tax						10.00%
Bottom of range [member] | Legal reserve [member]
Disclosure of classes of share capital [line items]
Increase in legal reserve						5.00%
Top of range [member] | Legal reserve [member]
Disclosure of classes of share capital [line items]
Increase in legal reserve						20.00%
Undated Subordinated Fixed Rate Bond [member]
Disclosure of classes of share capital [line items]
Face value of bond						$ 14,942,886	$ 13,715,747	$ 600,000
Amount of coupon						5.625%
Capital Stock Class AA Voting Rights [member]
Disclosure of classes of share capital [line items]
Number of shares issued						23,384,632,660
Capital Stock Class A Voting Rights [member]
Disclosure of classes of share capital [line items]
Number of shares issued						642,279,095
Capital Stock Class L Limited Voting Rights [member]
Disclosure of classes of share capital [line items]
Number of shares issued						71,462,812,441
Capital Stock Class Aa [member]
Disclosure of classes of share capital [line items]
Number of shares outstanding						20,601,632,660	20,634,632,660
Dividends paid			$ 0.30		$ 0.28
Capital Stock Class Aa [member] | Bottom of range [member]
Disclosure of classes of share capital [line items]
Percentage of capital stock						20.00%
Capital Stock Class Aa [member] | Top of range [member]
Disclosure of classes of share capital [line items]
Percentage of capital stock						51.00%
Capital Stock Class A [member]
Disclosure of classes of share capital [line items]
Number of shares outstanding						566,661,526	592,084,871
Dividends paid			0.30		0.28
Capital Stock Class A [member] | Bottom of range [member]
Disclosure of classes of share capital [line items]
Percentage of capital stock						19.60%
Capital Stock Class A [member] | Top of range [member]
Disclosure of classes of share capital [line items]
Percentage of capital stock						49.00%
Capital Stock Class L [member]
Disclosure of classes of share capital [line items]
Number of shares outstanding						44,900,741,353	44,571,282,469
Dividends paid			0.30		0.28
Periodic payment of dividend			$ 0.15		$ 0.14
Periodic payable date of dividend			July 17th and November 13th
Number of additional shares	16,905,414	325,264,125		397,909,031
Capital Stock Class L [member] | Top of range [member]
Disclosure of classes of share capital [line items]
Percentage of capital stock							80.00%
Class L [member]
Disclosure of classes of share capital [line items]
Number of treasury shares held						29,419,120,359	29,691,076,321
Class A [member]
Disclosure of classes of share capital [line items]
Number of treasury shares held						1,568,298	647,875

X

- Definition

Coupon rate.

+ References

No definition available.

+ Details

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

X

- Definition

Description of merger agreement.

+ References

No definition available.

+ Details

Name:	amx_DescriptionOfMergerAgreement
Namespace Prefix:	amx_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Dividend per share, periodic payment.

+ References

No definition available.

+ Details

Name:	amx_DividendPerSharePeriodicPayment
Namespace Prefix:	amx_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Dividends paid in ordinary shares.

+ References

No definition available.

+ Details

Name:	amx_DividendsPaidInOrdinaryShares
Namespace Prefix:	amx_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Legal reserves.

+ References

No definition available.

+ Details

Name:	amx_LegalReserves
Namespace Prefix:	amx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Minimum capital requirements.

+ References

No definition available.

+ Details

Name:	amx_MinimumCapitalRequirements
Namespace Prefix:	amx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Number of treasury shares.

+ References

No definition available.

+ Details

Name:	amx_NumberOfTreasuryShares
Namespace Prefix:	amx_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Percentage of capital stock.

+ References

No definition available.

+ Details

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

X

- Definition

Percentage of net profit to be transferred to reserve fund.

+ References

No definition available.

+ Details

Name:	amx_PercentageOfNetProfitToBeTransferredToReserveFund
Namespace Prefix:	amx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Periodic payable date of dividend.

+ References

No definition available.

+ Details

Name:	amx_PeriodicPayableDateOfDividend
Namespace Prefix:	amx_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Withholding tax rate on payment of dividend.

+ References

No definition available.

+ Details

Name:	amx_WithholdingTaxRateOnPaymentOfDividend
Namespace Prefix:	amx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The amount of bonds issued by the entity.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2017-01-01
-Paragraph 112
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_112_c&doctype=Standard
-URIDate 2017-03-09

+ Details

Name:	ifrs-full_BondsIssued
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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_DisclosureOfClassesOfShareCapitalLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The amount of dividends paid per ordinary share.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 34
-IssueDate 2017-01-01
-Paragraph 16A
-Subparagraph f
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=34&date=2017-03-01&anchor=para_16A_f&doctype=Standard
-URIDate 2017-03-09

+ Details

Name:	ifrs-full_DividendsPaidOrdinarySharesPerShare
Namespace Prefix:	ifrs-full_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The number of shares issued by the entity.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2017-01-01
-Paragraph 106
-Subparagraph d
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_106_d&doctype=Standard
-URIDate 2017-03-09

+ Details

Name:	ifrs-full_NumberOfSharesIssued
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The number of shares that have been authorised and issued, reduced by treasury shares held. [Refer: Treasury shares]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2017-01-01
-Paragraph 79
-Subparagraph a
-Clause iv
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_79_a_iv&doctype=Standard
-URIDate 2017-03-09

+ Details

Name:	ifrs-full_NumberOfSharesOutstanding
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	ifrs-full_RangeAxis=ifrs-full_BottomOfRangeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ReservesWithinEquityAxis=us-gaap_LegalReserveMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_RangeAxis=ifrs-full_TopOfRangeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_BorrowingsByNameAxis=amx_UndatedSubordinatedFixedRateBondMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfShareCapitalAxis=amx_CapitalStockClassAaVotingRightsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfShareCapitalAxis=amx_CapitalStockClassAVotingRightsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfShareCapitalAxis=amx_CapitalStockClassLLimitedVotingRightsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfShareCapitalAxis=amx_CapitalStockClassAaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfShareCapitalAxis=amx_CapitalStockClassAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfShareCapitalAxis=amx_CapitalStockClassLMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfShareCapitalAxis=amx_ClassLMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfShareCapitalAxis=amx_ClassAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: