XML 83 R10.htm IDEA: XBRL DOCUMENT
v3.21.1

Accounts receivable from subscribers, distributors, recoverable taxes contractual assets and other, net | 12 Months Ended
--- | ---
Dec. 31, 2020
Text block [abstract] |
Accounts receivable from subscribers, distributors, recoverable taxes contractual assets and other, net | 5. Accounts receivable from subscribers, distributors, recoverable taxes contractual assets and other, net a) An analysis of accounts receivable by component at December 31, 2019 and 2020 is as follows:
|  | At December 31, |
|  | 2019 |  |  | 2020 |
Subscribers and distributors |  |  | Ps.184,260,099 |  |  |  | Ps. 168,758,386 |
Telecommunications carriers for network interconnection and other services |  |  | 5,079,763 |  |  |  | 4,914,094 |
Recoverable taxes |  |  | 23,628,728 |  |  |  | 44,557,402 |
Sundry debtors |  |  | 12,084,050 |  |  |  | 12,504,566 |
Contract assets |  |  | 34,274,007 |  |  |  | 29,588,104 |
Impairment of trade receivables |  |  | (39,480,909 | ) |  |  | (44,551,735 | )
Total net |  |  | Ps.219,845,738 |  |  |  | Ps. 215,770,817 |
Non-current subscribers, distributors and contractual assets |  |  | Ps. 15,139,442 |  |  |  | Ps. 7,792,863 |
Total current subscribers, distributors and contractual assets |  |  | Ps.204,706,296 |  |  |  | Ps. 207,977,954 |
b) Changes in the impairment of trade receivables is as follows:
|  | For the years ended December 31, |
|  | 2018 |  |  | 2019 |  |  | 2020 |
Balance at beginning of year |  |  | Ps.(39,044,925 | ) |  |  | Ps.(40,798,025 | ) |  |  | Ps.(39,480,909 | )
Increases recorded in expenses |  |  | (19,535,707 | ) |  |  | (16,346,395 | ) |  |  | (19,112,635 | )
Adjustment on initial application of IFRS 9 |  |  | (2,400,783 | ) |  |  | — |  |  |  | — |
Write-offs |  |  | 15,497,254 |  |  |  | 17,839,957 |  |  |  | 11,953,227 |
Business combination |  |  |  |  |  |  | (3,265,490 | ) |  |  | (2,066 | )
Translation effect |  |  | 4,686,136 |  |  |  | 3,089,044 |  |  |  | 2,090,648 |
Balance at end of year |  |  | Ps.(40,798,025 | ) |  |  | Ps.(39,480,909 | ) |  |  | Ps.(44,551,735 | )
c) The following table shows the aging of accounts receivable at December 31, 2019 and 2020, for subscribers and distributors:
|  | Past due |
|  | Total |  |  | Unbilled services provided |  |  | a-30 days |  |  | 31-60 days |  |  | 61-90 days |  |  | Greater than 90 days |
December 31, 2019 |  | Ps. | 184,260,099 |  |  | Ps. | 76,223,243 |  |  | Ps. | 46,083,644 |  |  | Ps. | 6,076,281 |  |  | Ps. | 4,121,929 |  |  | Ps. | 51,755,002 |
December 31, 2020 |  | Ps. | 168,758,386 |  |  | Ps. | 75,972,811 |  |  | Ps. | 37,439,995 |  |  | Ps. | 5,325,264 |  |  | Ps. | 3,313,835 |  |  | Ps. | 46,706,481 |
d) The following table shows the accounts receivable from subscribers and distributors included in the impairments of trade receivables, as of December 31, 2019 and 202 0 :
|  | Total |  |  | 1-90 days |  |  | Greater than 90 days |
December 31, 2019 |  | Ps. | 39,480,909 |  |  | Ps. | 3,948,091 |  |  | Ps. | 35,532,818 |
December 31, 2020 |  | Ps. | 44,551,735 |  |  | Ps. | 4,455,174 |  |  | Ps. | 40,096,561 |
e) An analysis of contract assets and liabilities at December 31, 2019 and 2020 is as follows:
|  | 2019 |  |  | 2020 |
Contract Assets: |  |  |  |  |  |  |  |
Balance at the beginning of the year |  | Ps. | 34,718,749 |  |  | Ps. | 34,274,007 |
Additions |  |  | 34,877,851 |  |  |  | 27,242,031 |
Disposals |  |  | (2,658,641 | ) |  |  | (1,397,714 | )
Business Combination |  |  | 576,463 |  |  |  | — |
Amortization |  |  | (30,501,315 | ) |  |  | (29,002,995 | )
Translation effect |  |  | (2,739,100 | ) |  |  | (1,527,225 | )
Balance at the end of the year |  | Ps. | 34,274,007 |  |  | Ps. | 29,588,104 |
Non-current contract assets |  | Ps. | 1,786,560 |  |  | Ps. | 817,740 |
Current portion contracts assets |  | Ps. | 32,487,447 |  |  | Ps. | 28,770,364 |

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 trade and other receivables. [Refer: Trade and other receivables] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 10 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_10_e&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_DisclosureOfTradeAndOtherReceivablesExplanatory
Namespace Prefix: | ifrs-full_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration