América Móvil, S.A.B. de C.V. (AMX) 20-F 12 Apr 19 2018 FY Annual report (foreign) Financial data

Document and Entity Information

Document and Entity Information shares in Millions	12 Months Ended
	Dec. 31, 2018shares
Document Information [Line Items]
Document Type	20-F
Amendment Flag	false
Document Period End Date	Dec. 31, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	FY
Trading Symbol	AMX
Entity Registrant Name	AMERICA MOVIL SAB DE CV/
Entity Central Index Key	0001129137
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Emerging Growth Company	false
Entity Shell Company	false
AA Shares [member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding	20,602
A Shares [member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding	567
L Shares [member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding	44,887

Consolidated Statements of Fina

Consolidated Statements of Financial Position $ in Thousands, $ in Millions	Dec. 31, 2018MXN ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017MXN ($)
Current assets:
Cash and cash equivalents	$ 21,659,962	$ 1,100	$ 24,270,473
Equity investments at fair value through OCI and other short-term investments	49,015,934	2,490	59,120,676
Accounts receivable:
Subscribers, distributors, recoverable taxes, contract assets and other, net	216,226,920	10,986	193,776,144
Related parties	1,263,605	64	868,230
Derivative financial instruments	5,287,548	269	8,037,384
Inventories, net	40,305,362	2,048	38,809,565
Other current assets, net	15,296,193	777	17,352,746
Total current assets	349,055,524	17,734	342,235,218
Non-current assets:
Property, plant and equipment, net	640,000,720	32,516	676,343,198
Intangibles, net	122,137,703	6,205	143,539,626
Goodwill	145,566,497	7,396	151,463,232
Investments in associated companies	3,132,707	159	3,735,172
Deferred income taxes	111,186,768	5,649	116,571,349
Accounts receivable, subscriber, distributors and contract assets, net	15,681,872	797	9,786,581
Other assets, net	42,461,601	2,157	42,537,476
Total assets	1,429,223,392	72,613	1,486,211,852
Current liabilities:
Short-term debt and current portion of long-term debt	96,230,634	4,889	51,745,841
Accounts payable	221,957,267	11,277	212,673,407
Accrued liabilities	56,433,691	2,867	67,752,758
Income tax	19,232,191	977	9,362,009
Other taxes payable	23,979,334	1,218	24,387,484
Derivative financial instruments	13,539,716	688	10,602,539
Related parties	2,974,213	151	2,540,412
Deferred revenues	32,743,843	1,664	34,272,047
Total current liabilities	467,090,889	23,731	413,336,497
Non-current-liabilities:
Long-term debt	542,691,819	27,572	646,139,058
Deferred income taxes	24,573,441	1,248	11,997,364
Income tax	7,891,042	401	8,622,500
Deferred revenues	3,239,301	165	3,183,727
Derivative financial instruments	3,567,863	181	3,756,921
Asset retirement obligations	15,971,601	811	18,245,129
Employee benefits	118,325,014	6,012	120,297,139
Total non-current liabilities	716,260,081	36,390	812,241,838
Total liabilities	1,183,350,970	60,121	1,225,578,335
Equity:
Capital stock	96,338,378	4,895	96,338,508
Retained earnings:
Prior years	184,689,288	9,383	141,761,677
Profit for the year	52,566,197	2,670	29,325,921
Total retained earnings	237,255,485	12,053	171,087,598
Other comprehensive loss items	(137,598,218)	(6,990)	(73,261,794)
Equity attributable to equity holders of the parent	195,995,645	9,958	194,164,312
Non-controlling interests	49,876,777	2,534	66,469,205
Total equity	245,872,422	12,492	260,633,517
Total liabilities and equity	$ 1,429,223,392	$ 72,613	$ 1,486,211,852

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income $ in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2018MXN ($)$ / shares	Dec. 31, 2018USD ($)$ / shares	Dec. 31, 2017MXN ($)$ / shares	Dec. 31, 2016MXN ($)$ / shares
Operating revenues:
Revenues services	$ 863,647,642	$ 43,878	$ 878,411,323	$ 831,885,365
Sales of equipment	174,560,039	8,869	143,222,212	143,527,123
Operating revenues	1,038,207,681	52,747	1,021,633,535	975,412,488
Operating costs and expenses:
Cost of sales and services	508,822,430	25,851	496,335,746	485,060,579
Commercial, administrative and general expenses	227,192,478	11,543	240,634,431	228,101,116
Other expenses	6,923,022	352	24,345,113	4,114,562
Depreciation and amortization	155,712,580	7,911	160,174,942	148,525,921
Operating costs and expenses	898,650,510	45,657	921,490,232	865,802,178
Operating income	139,557,171	7,090	100,143,303	109,610,310
Interest income	10,646,169	541	2,925,648	4,192,595
Interest expense	(31,771,433)	(1,614)	(30,300,781)	(33,862,012)
Foreign currency exchange loss, net	(7,261,956)	(369)	(13,818,951)	(40,427,407)
Valuation of derivatives, interest cost from labor obligations and other financial items, net	(10,176,316)	(517)	(1,943,760)	(16,225,841)
Equity interest in net result of associated companies	267		91,385	189,950
Profit before income tax	100,993,902	5,131	57,096,844	23,477,595
Income tax	46,477,079	2,361	24,941,511	11,398,856
Net profit for the year	54,516,823	2,770	32,155,333	12,078,739
Net profit for the year attributable to:
Equity holders of the parent	52,566,197	2,670	29,325,921	8,649,427
Non-controlling interests	1,950,626	100	2,829,412	3,429,312
Net profit for the year	$ 54,516,823	$ 2,770	$ 32,155,333	$ 12,078,739
Basic and diluted earnings per share attributable to equity holders of the parent | (per share)	$ 0.79	$ 0.04	$ 0.44	$ 0.13
Net other comprehensive (loss) income that may be reclassified to profit or loss in subsequent years:
Effect of translation of foreign entities	$ (64,314,032)	$ (3,268)	$ (18,309,877)	$ 107,498,708
Effect of fair value of derivatives, net of deferred taxes			12,292	49,129
Items that will not be reclassified to (loss) or profit in subsequent years:
Re-measurement of defined benefit plan, net of deferred taxes	757,278	38	(7,046,089)	14,773,399
Unrealized (loss) gain on equity investments at fair value, net of deferred taxes	(3,765,688)	(191)	622,424	(6,673,731)
Total other comprehensive (loss) income items for the year, net of deferred taxes	(67,322,442)	(3,421)	(24,721,250)	115,647,505
Total comprehensive income (loss) for the year	(12,805,619)	(651)	7,434,083	127,726,244
Comprehensive income (loss) for the year attributable to:
Equity holders of the parent	(11,770,227)	(598)	1,201,698	120,974,842
Non-controlling interests	(1,035,392)	(53)	6,232,385	6,751,402
Total comprehensive income (loss) for the year	$ (12,805,619)	$ (651)	$ 7,434,083	$ 127,726,244

Consolidated Statements of Chan

Consolidated Statements of Changes in Shareholders' Equity $ in Thousands, $ in Millions	MXN ($)	USD ($)	Capital stock [member]MXN ($)	Legal reserve [member]MXN ($)	Retained earnings [member]MXN ($)	Effect of derivative financial instruments acquired for hedging purposes [member]MXN ($)	Reserve of gains and losses from investments in equity instruments [member]MXN ($)	Re-measurements of defined benefit plans [member]MXN ($)	Cumulative translation adjustment [member]MXN ($)	Total equity attributable to equity holders of the parent [member]MXN ($)	Non- controlling interests [member]MXN ($)
Beginning balance at Dec. 31, 2015	$ 160,854,186				$ 171,972,999		$ 4,011	$ (82,844,947)	$ (73,490,197)	$ 112,277,995	$ 48,576,191
Net profit for the year	12,078,739				8,649,427					8,649,427	3,429,312
Effect of fair value of derivatives, net of deferred taxes	49,129					$ 48,496				48,496	633
Unrealized gain or loss on equity investments at fair value, net of deferred taxes	(6,673,731)						(6,673,731)			(6,673,731)
Remeasurement of defined benefit plan, net of deferred taxes	14,773,399							14,771,770		14,771,770	1,629
Effect of translation of foreign entities	107,498,708								104,178,880	104,178,880	3,319,828
Total comprehensive income (loss) for the year	127,726,244				8,649,427	48,496	(6,673,731)	14,771,770	104,178,880	120,974,842	6,751,402
Dividends declared	(18,991,635)				(18,339,294)					(18,339,294)	(652,341)
Stock dividend (Note 19)	4,607,786		$ 1,512		4,606,274					4,607,786
Repurchase of shares	(7,215,872)		(2,475)		(7,213,397)					(7,215,872)
Partial sale of shares of Telekom Austria (Note 12)	6,323,336							68,127	(1,139,192)	(1,071,065)	7,394,401
Other acquisitions of non-controlling interests (Note 12)	(2,280,278)				(2,319,149)					(2,319,149)	38,871
Ending balance at Dec. 31, 2016	271,023,767		96,337,514	$ 358,440	157,356,860	(12,292)	(6,669,720)	(68,005,050)	29,549,491	208,915,243	62,108,524
Net profit for the year	32,155,333				29,325,921					29,325,921	2,829,412
Effect of fair value of derivatives, net of deferred taxes	12,292					12,292				12,292
Unrealized gain or loss on equity investments at fair value, net of deferred taxes	622,424						622,424			622,424
Remeasurement of defined benefit plan, net of deferred taxes	(7,046,089)							(7,075,606)		(7,075,606)	29,517
Effect of translation of foreign entities	(18,309,877)								(21,683,333)	(21,683,333)	3,373,456
Total comprehensive income (loss) for the year	7,434,083				29,325,921	$ 12,292	622,424	(7,075,606)	(21,683,333)	1,201,698	6,232,385
Dividends declared	(21,663,578)				(19,815,470)					(19,815,470)	(1,848,108)
Stock dividend (Note 19)	4,904,082		1,264		4,902,818					4,904,082
Repurchase of shares	(1,040,956)		(270)		(1,040,686)					(1,040,956)
Other acquisitions of non-controlling interests (Note 12)	(23,881)				(285)					(285)	(23,596)
Ending balance (Effect of adoption of new accounting standards [member]) at Dec. 31, 2017	20,116,789				19,598,349					19,598,349	518,440
Ending balance (Restated balance [member]) at Dec. 31, 2017	280,750,306		96,338,508	358,440	190,327,507		(6,047,296)	(75,080,656)	7,866,158	213,762,661	66,987,645
Ending balance at Dec. 31, 2017	260,633,517		96,338,508	$ 358,440	170,729,158		(6,047,296)	(75,080,656)	7,866,158	194,164,312	66,469,205
Net profit for the year	54,516,823				52,566,197					52,566,197	1,950,626
Unrealized gain or loss on equity investments at fair value, net of deferred taxes	(3,765,688)	$ (191)					(3,765,688)			(3,765,688)
Remeasurement of defined benefit plan, net of deferred taxes	757,278	38						652,722		652,722	104,556
Effect of translation of foreign entities	(64,314,032)								(61,223,458)	(61,223,458)	(3,090,574)
Total comprehensive income (loss) for the year	(12,805,619)	(651)			52,566,197		(3,765,688)	652,722	(61,223,458)	(11,770,227)	(1,035,392)
Dividends declared	(22,984,982)				(21,134,520)					(21,134,520)	(1,850,462)
Hyperinflation adjustment (Note 2i)	15,826,934				15,826,934					15,826,934
Repurchase of shares	(518,763)		$ (130)		(518,633)					(518,763)
Redemption of hybrid bond (Note 19)	(13,440,120)	(683)									(13,440,120)
Other acquisitions of non-controlling interests (Note 12)	(955,334)				$ (170,440)					(170,440)	(784,894)
Ending balance at Dec. 31, 2018	$ 245,872,422	$ 12,492					$ (9,812,984)	$ (74,427,934)	$ (53,357,300)	$ 195,995,645	$ 49,876,777

Consolidated Statements of Cash

Consolidated Statements of Cash Flows $ in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2018MXN ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017MXN ($)	Dec. 31, 2016MXN ($)
Operating activities
Profit before income tax	$ 100,993,902	$ 5,131	$ 57,096,844	$ 23,477,595
Items not requiring the use of cash:
Depreciation	129,115,727	6,560	135,206,080	127,662,344
Amortization of intangible and other assets	26,596,853	1,351	24,968,862	20,863,577
Equity interest in net income of associated companies	(267)		(91,385)	(189,950)
Loss on sale of property, plant and equipment	664,777	34	145,225	8,059
Net period cost of labor obligations	13,989,100	711	13,636,182	14,240,271
Foreign currency exchange loss, net	6,148,612	312	11,699,985	34,049,726
Interest income	(10,646,169)	(541)	(2,925,648)	(4,192,595)
Interest expense	31,771,433	1,614	30,300,781	33,862,012
Employee profit sharing	1,500,342	76	1,751,312	2,235,267
Loss (gain) in valuation of derivative financial instruments, capitalized interest expense and other, net	(7,518,445)	(382)	(19,010,851)	85,216
Gain on net monetary positions	(4,429,145)	(225)
Working capital changes:
Subscribers, distributors, recoverable taxes, contract assets and other, net	(15,420,291)	(783)	1,799,095	(14,192,651)
Prepaid expenses	3,264,685	166	4,588,584	792,979
Related parties	38,426	2	(558,651)	829,632
Inventories	(3,232,136)	(164)	(2,991,009)	3,076,159
Other assets	(6,081,740)	(309)	(4,763,394)	(2,944,581)
Employee benefits	(14,235,549)	(723)	(14,692,218)	(5,384,944)
Accounts payable and accrued liabilities	23,997,632	1,219	5,190,137	18,196,349
Employee profit sharing paid	(1,013,799)	(52)	(1,471,946)	(3,297,439)
Financial instruments and other	5,286,290	269	1,515,668	28,878,632
Deferred revenues	38,243	2	(452,913)	(972,376)
Interest received	1,215,800	62	819,940	3,239,845
Income taxes paid	(33,713,753)	(1,713)	(23,988,305)	(44,525,073)
Net cash flows provided by operating activities	248,330,528	12,617	217,772,375	235,798,054
Investing activities
Purchase of property, plant and equipment	(143,888,033)	(7,310)	(119,185,137)	(138,707,157)
Acquisition of intangibles	(7,933,647)	(403)	(17,538,541)	(16,316,738)
Dividends received	2,622,237	133	2,385,559	5,740,092
Proceeds from sale of plant, property and equipment	178,532	9	133,349	115,600
Acquisition of businesses, net of cash acquired	(310,604)	(16)	(6,878,793)	(1,823,813)
Partial sale of shares of associated company	548,484	28	340,040
Investments in associate companies				(3,487)
Net cash flows provided by (used in) investing activities	(148,783,031)	(7,559)	(140,743,523)	(150,995,503)
Financing activities
Loans obtained	155,263,221	7,888	143,607,726	64,281,631
Repayment of loans	(189,314,144)	(9,618)	(171,041,215)	(125,672,444)
Interest paid	(30,869,017)	(1,568)	(31,196,441)	(32,125,872)
Repurchase of shares	(511,421)	(26)	(1,233,371)	(7,021,247)
Dividends paid	(22,369,793)	(1,137)	(16,091,390)	(13,809,957)
Derivative financial instruments			(71,474)	(351,213)
Partial sale of shares in subsidiary				6,323,336
Redemption of hybrid bond	(13,440,120)	(683)
Acquisition of non-controlling interests	(115,821)	(6)	(11,930)	(2,280,278)
Net cash flows used in financing activities	(101,357,095)	(5,150)	(76,038,095)	(110,656,044)
Net (decrease) increase in cash and cash equivalents	(1,809,598)	(92)	990,757	(25,853,493)
Adjustment to cash flows due to exchange rate fluctuations, net	(800,913)	(41)	61,333	3,911,844
Cash and cash equivalents at beginning of the period	24,270,473	1,233	23,218,383	45,160,032
Cash and cash equivalents at end of the period	21,659,962	1,100	24,270,473	23,218,383
Non-cash transactions related to:
Acquisitions of property, plant and equipment in accounts payable at end year	19,099,066	970	18,869,210	13,497,804
Redemption of exchangeable bond	16,446,262	836
Non-cash transactions	$ 35,545,328	$ 1,806	$ 18,869,210	$ 13,497,804

Description of the Business and

Description of the Business and Relevant Events	12 Months Ended
	Dec. 31, 2018
Text block [abstract]
Description of the Business and Relevant Events	1. Description of the Business and Relevant Events I. Corporate Information América Móvil, S.A.B. de C.V. and subsidiaries (hereinafter, the “Company”, “América Móvil” or “AMX”) was incorporated under laws of Mexico on September 25, 2000. The Company provides telecommunications services in 25 countries throughout Latin America, the United States, the Caribbean and Europe. These telecommunications services include mobile and fixed-line voice services, wireless and fixed data services, internet access and Pay TV, over the top and other related services. The Company also sells equipment, accessories and computers. • Voice services provided by the Company, both wireless and fixed, mainly include the following: airtime, local, domestic and international long-distance services, and network interconnection services. • Data services include value added, corporate networks, data and Internet services. • Pay TV represents basic services, as well as pay per view and additional programming and advertising services. • AMX provides other related services to advertising in telephone directories, publishing and call center services. • The Company also provides video, audio and other media content that is delivered through the internet directly from the content provider to the end user. In order to provide these services, América Móvil has licenses, permits and concessions (collectively referred to herein as “licenses”) to build, install, operate and exploit public and/or private telecommunications networks and provide miscellaneous telecommunications services (mostly mobile and fixed voice and data services) and to operate frequency bands in the radio-electric spectrum for point-to-point point-to-multipoint Certain licenses require the payment to the respective governments of a share in sales determined as a percentage of revenues from services under concession. The percentage is set as either a fixed rate or in some cases based on certain size of the infrastructure in operation. The corporate offices of América Móvil are located in Mexico City, Mexico, at Lago Zurich 245, Colonia Ampliación Granada, Delegación Miguel Hidalgo, 11529, Mexico City, Mexico. The accompanying consolidated financial statements were approved for their issuance by the Company’s Chief Financial Officer on April 9, 2019, and subsequent events have been considered through that date.

Basis of Preparation of the Con

Basis of Preparation of the Consolidated Financial Statements and Summary of Significant Accounting Policies and Practices	12 Months Ended
	Dec. 31, 2018
Text block [abstract]
Basis of Preparation of the Consolidated Financial Statements and Summary of Significant Accounting Policies and Practices	2. Basis of Preparation of the Consolidated Financial Statements and Summary of Significant Accounting Policies and Practices a) Basis of preparation The accompanying consolidated financial statements have been prepared in conformity with International Financial Reporting Standards, as issued by the International Accounting Standards Board (“IASB”) (hereafter referred to as IFRS). The consolidated financial statements have been prepared on the historical cost basis, except for the derivative financial instruments, the trust assets of post-employment and other employee benefit plans and the investments in equity at fair value through OCI which are presented at their market value. Effectively July 1, 2018, the Argentinian economy is considered to be hyperinflationary in accordance with the criteria in IAS 29 “Financial Reporting in Hyperinflationary Economies” (“IAS 29”) The preparation of these consolidated financial statements under IFRS requires the use of critical estimates and assumptions that affect the amounts reported for certain assets, liabilities, income and expenses. It also requires that management exercise judgment in the application of the Company’s accounting policies. Actual results could differ from these estimates and assumptions. The Mexican peso is the functional currency of the Company’s Mexican operations and the consolidated reporting currency of the Company. i) Changes in Accounting Policies and Disclosures The Company applied IFRS 15 “Revenue from Contracts with Customers” Financial Instruments” The accounting policies applied in the preparation of the consolidated financial statements for the year ended December 31, 2018 are consistent with those used in the preparation of the Company´s consolidated annual financial statements for the years ended December 31, 2017 and 2016, with the exception of the following new standards and amendments to existing standards issued by the IASB, which were mandatory for annual periods beginning on or after January 1, 2018: a) IFRS 15 Revenue from contract with customer In May 2014, the IASB issued the new standard IFRS 15 IFRS 15 supersedes IAS 11 Construction Contracts Revenue IFRS 15 requires entities to exercise judgment, taking into consideration all of the relevant facts and circumstances when applying each step of the model to contracts with their customers. The standard also specifies the accounting for the incremental costs of obtaining a contract and the costs directly related to fulfilling a contract. In addition, the standard requires relevant disclosures. The Company adopted IFRS 15 using the modified retrospective method of adoption with the date of initial application on January 1, 2018. Under this method, the standard can be applied either to all contracts at the date of initial application or only to contracts that are not completed at this date. The Company elected to apply the standard to all contracts as of January 1, 2018. The cumulative effect of initially applying IFRS 15 was recognized at the date of initial application as an adjustment to the opening balance of retained earnings. Therefore, the comparative information was not restated and continues to be reported under IAS 11, IAS 18 and related Interpretations. The most significant changes in the implementation of IFRS 15 are the earlier recognition of revenue from the sale of goods, and the capitalization and deferral of the incremental contracts acquisition costs over the expected period of benefit. The effect of adopting IFRS 15 as of January 1, 2018 was, as follows: Reference Increase Assets: Subscribers, distributors, recoverable taxes, contract assets and other, net (a), (b), (c) Ps. 31,261,436 Liabilities: Current liabilities (c) Ps. 562,651 Deferred income taxes (d) 8,725,841 Ps. 9,288,492 Equity: Retained earnings (a), (b), (c), (d) 21,454,504 Non-controlling 518,440 Total equity 21,972,944 Total liabilities and equity Ps. 31,261,436 Set out below are, the impacts of adopting IFRS 15 on the Company´s consolidated financial statements for the year ended December 31, 2018: Reference As reported Figures without Adjustments Operating revenues: Revenues services (a), (b) Ps. 863,647,642 Ps. 881,530,167 Ps. (17,882,525 ) Sales of equipment (a), (b) 174,560,039 158,721,765 15,838,274 1,038,207,681 1,040,251,932 (2,044,251 ) Operating costs and expenses: Cost of sales and services Ps. 508,822,430 Ps. 509,100,174 Ps. (277,744 ) Commercial, administrative and general and other expenses (c) 234,115,500 240,010,631 (5,895,131 ) Depreciation and amortization 155,712,580 155,712,580 — 898,650,510 904,823,385 (6,172,875 ) 139,557,171 135,428,547 4,128,624 Financial items, net 38,563,536 38,356,359 207,177 Equity interest in net result of associated companies 267 267 — Income tax (d) 46,477,079 45,496,698 980,381 Non-controlling (1,950,626 ) (1,950,626 ) — Net profit for the year Ps. 52,566,197 Ps. 49,625,131 Ps. 2,941,066 Reference As reported Balances without Adjustments Assets: Current assets: Cash and cash equivalents and equity investments at fair value Ps. 70,675,896 Ps. 70,675,896 Ps. — Subscribers, distributors, recoverable taxes, contract assets and other, net (a), (b), (c) 216,226,920 185,303,634 30,923,286 Other current assets, net 62,152,708 62,152,708 — Total current assets 349,055,524 318,132,238 30,923,286 Non-current Property, plant and equipment, net 640,000,720 640,000,720 — Intangibles and other assets, net 424,485,276 424,485,276 — Subscribers, distributors, recoverable taxes, contract assets and other, net (a), (b), (c) 15,681,872 10,244,609 5,437,263 Total assets Ps. 1,429,223,392 Ps. 1,392,862,843 Ps. 36,360,549 Liabilities and equity: Current liabilities: Short-term debt and current portion of long-term debt Ps. 96,230,634 Ps. 96,230,634 Ps. — Accounts payable and other liabilities 338,116,412 337,448,940 667,472 Deferred revenues 32,743,843 32,315,690 428,153 Total current liabilities 467,090,889 465,995,264 1,095,625 Non-current-liabilities: Long-term debt 542,691,819 542,691,819 — Deferred income taxes (d) 24,573,441 15,382,500 9,190,941 Other liabilities 148,994,821 148,994,821 — Total liabilities 1,183,350,970 1,173,064,404 10,286,566 Total equity (d) 245,872,422 219,798,439 26,073,983 Total liabilities and equity Ps. 1,429,223,392 Ps. 1,392,862,843 Ps. 36,360,549 IFRS 15 Revenues from contracts with customers IFRS 15 establishes a comprehensive framework for determining when to recognize revenue and how much revenue to recognize. The principle core is that an entity should recognize revenue to depict the transfer of promised goods or services to the customer in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The most significant changes in the implementation of IFRS 15 are as follows: a. The Company provides fixed and mobile services. These services are offered independently in contracts with customers or together with the sale of handsets (mobile) under the postpaid model. In accordance with IFRS 15, the transaction price should be assigned to the different performance obligations based on their relative standalone selling price. The Company concluded that regarding the provided services, it has market observable information, to determine the standalone selling price of the services. On the other hand, in the case of the sale of bundled mobile phones sold (including service and handset) by the Company, the allocation of the sales is done based on their relative standalone selling price of each individual component related to the total bundled price. The result is that more equipment revenue is recognized at the moment of a sale and, therefore, less service revenue from the monthly fee are being recognized under the new standard. The Company concluded as well that the provided services are satisfied over the time of the contract period, given that the customer simultaneously receives and consumes the benefits provided by the Company. Such service bundles, voice and data, accomplish the criteria mentioned in IFRS 15 of being substantially similar and of having the same transfer pattern which is why the Company concluded that the revenue from these different services offered to its customers are considered as a single performance obligation with revenue being recognized over time, except for sales of equipment. b. Under IFRS 15, for those contracts with customers in which generally the sale of equipment and other electronic equipment is a single performance obligation, the Company recognizes the revenue at the moment when it transfers control to the customer which generally occurs when such goods are delivered. The latter is consistent with the previous accounting policy. c. The Company pays commissions to its distributors for obtaining new customers; such commissions were expensed as incurred under the previous accounting. Under IFRS 15, commissions are considered incremental contract acquisition costs that are capitalized and are amortized over the expected period of benefit, during the average duration of customer contracts. d. In addition to the adjustments described above, other items such as deferred taxes and non-controlling b) IFRS 9, Financial Instruments IFRS 9 was issued in July 2014 and replaced IAS 39 Financial Instruments The Company applied IFRS 9 prospectively, with an initial application date of January 1, 2018. The Company has not restated the comparative information, which continues to be reported under IAS 39. The effect of adopting IFRS 9 as of January 1, 2018 was, as follows: Adjustments January 1, 2018 Assets Trade receivables (a) Ps. (2,400,783 ) Deferred tax assets (b) 544,628 Total assets Ps. (1,856,155 ) Equity Retained earnings (a), (b) Ps. (1,856,155 ) Total adjustment on equity Ps. (1,856,155 ) IFRS 9 sets out the requirements for recognizing and measuring financial assets and financial liabilities. This new standard includes: a) Impairment The adoption of IFRS 9 has fundamentally changed the Company´s accounting for impairment losses for financial assets by replacing IAS 39’s incurred loss approach with a forward-looking expected credit loss approach. IFRS 9 requires the Company to recognize an allowance for expected credit loss for all debt instruments not held at fair value through profit or loss and contract assets. Upon adoption of IFRS 9 the Company recognized an impairment on the Company´s trade receivables at fair value Ps 2,400,783 as of January 1, 2018, which resulted in a decrease in Retained earnings. There were no impairment losses that impacted the carrying amount of debt instruments at fair value through OCI in the statements of financial position, which remains at fair value. b) Other adjustments In addition to the adjustments described above, other items such as deferred taxes and non-controlling The new requirements of IFRS 9 regarding hedge accounting do not have an effect on the consolidated financial statements as hedge accounting is not applied. The Company continues to consider the hedges to be under IAS 39 as allowed by IFRS 9. Compared to IAS 39, the application of IFRS 9 had an immaterial effect on the consolidated financial statements in 2018, including classification of financial assets and liabilities. c) Impact of the application for hyperinflation in Argentina In the recent years, the Argentina economy has shown high rates of inflation. Although inflation data has not been consistent in recent years and several indexes have coexisted, inflation in Argentina indicates that the three-year In order to restate for hyperinflation its financial statements, the subsidiary used the series of indices defined by resolution JG No. 539/18 issued by the “Federación Argentina de Consejos Profesionales de Ciencias Económicas” (FACPCE), based on the National Consumer Price Index (IPC) published by the Instituto Nacional de Estadística y Censos (INDEC) of the Argentine Republic and the Wholesale Internal Price Index (IPIM) published by FACPCE. The cumulative index December 31, 2018 is 184.255, while on an annual inflation for 2018 is 48%. The main implications are as follows: • Adjustment of the historical cost of non-monetary • The gain on the net monetary position caused by the impact of inflation in the year is included in the consolidated statements of comprehensive income as part of the caption “ Valuation of derivatives, interest cost from labor obligations and other financial items, net • All items in the financial statements of the Argentine company are translated at the closing exchange rate, which at December 31, 2018 was 0.5221 argentine pesos per mexican peso. • Financial information for financial years prior to 2018 are not restated. The main impact in the consolidated financial statements of the Company in 2018 of applying hyperinflationary accounting under IAS 29 are shown below: Impact of the Impact in: Operating revenues Ps. 6,286,140 Operating loss (1,423,252 ) Financial loss (1,289,317 ) Gain on net monetary positions 4,429,145 Income tax (770,928 ) Net profit for the year 945,647 Current assets 1,866,674 Non-current 19,796,073 Total liabilities 4,890,166 Total equity (i) 16,772,581 (i) This total includes the initial effect of hyperinflation of Ps. 15,826,934 and the net effect on results due to the hyperinflation of the year of Ps. 945,647. ii) Basis of consolidation The consolidated financial statements include the accounts of América Móvil, S.A.B. de C.V. and those subsidiaries over which the Company exercises control. The consolidated financial statements for the subsidiaries were prepared for the same period as the Company´s and applying consistent accounting policies. All of the subsidiary companies operate in the telecommunications sector or related. Subsidiaries are entities over which the Company has control. Control is achieved when the Company has power over the investee, when it is exposed to, or has rights to, variable returns from its involvement with the investee, and has the ability to use its power over the investee to affect the amount of the investor’s returns. Subsidiaries are consolidated on a line by line basis from the date which control is achieved by the Company. The Company reassesses whether or not it controls an investee if facts and circumstances indicate that there are changes to one or more of the elements of control. Changes in the Company’s ownership interests in a subsidiary that do not result in the Company losing control over the subsidiary are accounted for as equity transactions. The carrying amounts of the equity attributable to owners of the parent and non-controlling non-controlling Subsidiaries are deconsolidated from the date which control ceases. When the Company ceases to have control over a subsidiary, it derecognizes the assets (including any goodwill) and liabilities of the subsidiary at their carrying amounts, derecognizes the carrying amount of non-controlling All intra-Company balances and transactions, and any unrealized gains and losses arising from intra-Company transactions, are eliminated in preparing the consolidated financial statements. Non-controlling Non-controlling Associates: An associate is an entity over which the Company has significant influence. Significant influence is the power to participate in the financial and operating policy decisions of the investee but does not have control or joint control over those decisions. The Company’s investment in associates includes goodwill identified on acquisition, net of any accumulated impairment losses. The investments in associated companies in which the Company exercises significant influence are accounted for using the equity method, whereby Company recognizes its share in the net profit (losses) and equity of the associate. The results of operations of the subsidiaries and associates are included in the Company’s consolidated financial statements beginning as of the month following their acquisition and its share of other comprehensive income after acquisition is recognized directly in other comprehensive income. The Company assesses at each reporting date whether there is objective evidence that investment in associates is impaired. If so, the Company calculates the amount of impairment as the difference between the recoverable amount of the associate and its carrying value. The equity interest in the most significant subsidiaries at December 31, 2017 and 2018 is as follows: Company name Country Equity interest at 2017 2018 Subsidiaries: América Móvil B.V. a) Netherlands 100.0 % 100.0 % Compañía Dominicana de Teléfonos, S.A. (“Codetel”) b) Dominican Republic 100.0 % 100.0 % Sercotel, S.A. de C.V. a) Mexico 100.0 % 100.0 % Radiomóvil Dipsa, S.A. de C.V. and subsidiaries (“Telcel”) b) Mexico 100.0 % 100.0 % Puerto Rico Telephone Company, Inc. b) Puerto Rico 100.0 % 100.0 % Servicios de Comunicaciones de Honduras, S.A. de C.V. (“Sercom Honduras”) b) Honduras 100.0 % 100.0 % TracFone Wireless, Inc. (“TracFone”) b) USA 100.0 % 100.0 % Claro S.A. (Claro Brasil) b) Brazil 97.7 % 98.2 % Telecomunicaciones de Guatemala, S.A. (“Telgua”) b) Guatemala 99.3 % 99.3 % Empresa Nicaragüense de Telecomunicaciones, S.A. (“Enitel”) b) Nicaragua 99.6 % 99.6 % Compañía de Telecomunicaciones de El Salvador, S.A. de C.V. (“CTE”) b) El Salvador 95.8 % 95.8 % Comunicación Celular, S.A. (“Comcel”) b) Colombia 99.4 % 99.4 % Telmex Colombia, S.A. b) Colombia 99.3 % 99.3 % Consorcio Ecuatoriano de Telecomunicaciones, S.A. (“Conecel”) b) Ecuador 100.0 % 100.0 % AMX Argentina, S.A. b) Argentina 100.0 % 100.0 % AMX Paraguay, S.A. b) Paraguay 100.0 % 100.0 % AM Wireless Uruguay, S.A. b) Uruguay 100.0 % 100.0 % Claro Chile, S.A. b) Chile 100.0 % 100.0 % América Móvil Perú, S.A.C b) Peru 100.0 % 100.0 % Claro Panamá, S.A. b) Panamá 100.0 % 100.0 % Teléfonos de México, S.A.B. de C.V. b) Mexico 98.8 % 98.8 % Telekom Austria AG b) Austria 51.0 % 51.0 % a) Holding companies b) Operating companies of mobile and fixed services iii) Basis of translation of financial statements of foreign subsidiaries and associated companies The operating revenues of foreign subsidiaries jointly represent approximately 72%, 74% and 73% of consolidated operating revenues of 2016, 2017 and 2018, respectively, and their total assets jointly represent approximately 81% and 80% of consolidated total assets at December 31, 2017 and 2018, respectively. The financial statements of foreign subsidiaries have been prepared under or translated to IFRS in the respective local currency (which is their functional currency) and then translated into the Company´s reporting currency as follows: • all monetary assets and liabilities were translated at the closing exchange rate of the period; • all non-monetary • equity accounts are translated at the exchange rate at the time the capital contributions were made and the profits were generated; • revenues, costs and expenses are translated at the average exchange rate of the period, except for the operations of the subsidiaries in Argentina; whose economy is considered hyperinflationary since 2018; • the resulting difference from the translation process is recognized in equity in the caption Cumulative translation adjustment; • the consolidated statements of cash flows presented using the indirect method were translated using the weighted-average exchange rate for the applicable period (except for Argentina), and the resulting difference is shown in the consolidated statements of cash flows under the heading “Adjustment to cash flows due to exchange rate fluctuations, net”. The basis of translation for the operations of the subsidiaries in Argentina are described in Note 2i, c) The difference resulting from the translation process is recognized in equity in the caption “Effect of translation of foreign entities”. At December 31, 2017 and 2018, the cumulative translation adjustment was Ps. 7,866,158 and Ps. (53,357,300), respectively. b) Revenue recognition The Company revenues are derived principally from providing the following telecommunications services and products: wireless voice, wireless data and value-added services, fixed voice, fixed data, broadband and IT services, Pay TV and over-the-top The wireless voices services are offered under a variety of plans. In addition, the Company often bundle wireless data telecommunications services together with voices services. Monthly rent in post- paid is billed based on the associated plan o package rates, corresponding to when the services are provided. As part the wireless data services, the Company offer value-added services that include Internet access, messaging and other wireless entertainment and corporative services, Revenue from such services are recognized at the time they are provided, on the date the installation or when the services are downloaded. In addition, the Company offer other wireless services, including wireless security services, mobile payments solutions, machine-to-machine The fixed voices services include local, domestic and international long-distance and public telephone services, under a variety of plans, specifically tailored to our residential and corporate clients. Revenue from the local services are derived from the monthly rent for services and the long-distances revenues are recognized at the time the service is provided. The Company offer data services, including data centers, data administration and hosting services to our residential and corporate clients under a variety of plans. These revenues are recognized at the time the service is provided. The residential broadband access are typically bundled with voice services and are competitively priced as a function of the desired or available speed. As a complement to these services, the Company offer a number of products such as home networking and smart home services. In addition, The Company provide different IT solutions for small business and large corporations. The Company offer Pay TV through cable and satellite TV subscriptions to both retail and corporate customers under a variety of plans. These services are offered through individual subscription plans as well as in bundled packages of services, along with broadband, fixed voice and wireless services. In addition, the Company sell video, audio and other media content that is delivered through the internet directly from the content provider to the viewer or end user. These revenues are recognized at the time the service is provided. The Company sells to its customers bundles of different services (fixed line, mobile, broadband internet, streaming and pay TV, among others) which elements are evaluated to determine if it is necessary to separate the different identifiable components and apply the income recognition policy corresponding to each element. Total package revenue is allocated among the identified elements based on their respective standalone selling prices. Determining standalone selling prices for each identified element requires estimates that are complex due to the nature of the business. A change in estimates of standalone selling prices could affect the apportionment of revenue among the elements and, as a result, the timing of recognition of revenues. Transaction prices are allocated to the performance obligations by reference to the relative stand-alone selling prices of the products and services. The stand-alone selling prices of products are based on the market prices whereas the standalone selling prices of services are available separately, as services are also offered on a stand-alone basis, i.e. without hardware. Some subsidiaries have loyalty programs where the Company awards credits customer credit awards referred as “points”. The customer can redeem accrued “points” for awards such as devices, accessories or airtime. The Company provides all awards. The consideration allocated to the award credits is identified as a separate performance obligation; the corresponding liability of the award credits is measured at its fair value. The consideration allocated to award credits amount is recognized as a contract liability until the points are redeemed. Revenue is recognized upon redemption of products by the customer. c) Cost of sales The cost of mobile equipment and computers is recognized at the time the client and distributor receives the device that is when the control is are transferred to the customer. d) Cost of services The cost of services represents the costs incurred to properly deliver the services to the customers, it includes the network operating costs and licenses related costs and is accounted at the moment in which such services are provided. e) Commissions to distributors The Company pays commissions to its distributors different than those that acquire customers. Such commissions are recognized in “commercial, administrative and general expenses” in the consolidated statements of comprehensive income at the time in which the distributor either reports an activation or reaches certain number of lines activated or obtained at a certain point of time. f) Cash and cash equivalents Cash and cash equivalents represent bank deposits and liquid investments with maturities of less than three months. These amounts are stated at cost plus accrued interest, which is similar to their market value. The Company also maintains restricted cash held as collateral to meet certain contractual obligations. Restricted cash is presented as part of “Other assets” within other non-current g) Equity investments at fair value through OCI and other short-term investments Equity investments at fair value through OCI and other short-term investments are primarily composed of equity investments and other short-term financial investments. Amounts are initially recorded at their estimated fair value. Fair value adjustments for equity investments are recorded through other comprehensive income, while fair value adjustments for other short-term investments are recorded in the Consolidated Statements of Comprehensive Income as they occur. h) Inventories Inventories are initially recognized at historical cost and are valued using the average cost method without exceeding their net realizable value. The estimate of the realizable value of inventories on-hand i) Business combinations and goodwill Business combinations are accounted for using the acquisition method, which in accordance with IFRS 3, “ Business acquisitions (i) Identify the acquirer (ii) Determine the acquisition date (iii) Value the acquired identifiable assets and assumed liabilities (iv) Recognize the goodwill or a bargain purchase gain For acquired subsidiaries, goodwill represents the difference between the purchase price and the fair value of the net assets acquired at the acquisition date. The investment in acquired associates includes goodwill identified on acquisition, net of any impairment loss. Goodwill is reviewed annually to determine its recoverability or more often if circumstances indicate that the carrying value of the goodwill might not be fully recoverable. The possible loss of value in goodwill is determined by analyzing the recovery value of the cash generating unit (or the group thereof) to which the goodwill is associated at the time it was originated. If this recoverable amount is lower than the carrying value, an impairment loss is charged to the results of operations. The recoverable amount is determined based on the higher of fair value less cost of disposal or value in use. For the years ended December 31, 2016, 2017 and 2018, no impairment losses were recognized for the goodwill shown in the Company’s consolidated statements of financial position. j) Property, plant and equipment i) Property, plant and equipment are recorded at acquisition cost, net of accumulated depreciation. Depreciation is computed on the cost of the assets using the straight line method, based on the estimated useful lives of the related assets, beginning the month after they become available for use. Borrowing costs that are incurred for general financing for construction in progress for periods exceeding six months are capitalized as part of the cost of the asset. During 2016, 2017 and 2018 the borrowing costs that were capitalized amounted to Ps. 2,861,307, Ps. 2,875,034 and Ps. 2,020,288 respectively. In addition to the purchase price and costs directly attributable to preparing an asset in terms of its physical location and condition for operating as intended by management, when required, the cost also includes the estimated costs of dismantling and removal of the asset and for restoration of the site where it is located (See Note 15c). ii) The net book value of property, plant and equipment is removed from the consolidated statements of financial position at the time the asset is sold or when no future economic benefits are expected from its use or sale. Any gains or losses on the sale of property, plant and equipment represent the difference between net proceeds of the sale and the net book value of the item at the time of sale. These gains or losses are recognized as either other operating income or other operating expenses upon sale. iii) The Company periodically assesses the residual values, useful lives and depreciation methods associated with its property, plant and equipment. If necessary, the effects of any changes in accounting estimates is recognized prospectively, at the closing of each period, in accordance with IAS 8, “ Accounting Policies, Changes in Accounting Estimates and Errors For property, plant and equipment made up of several components with different useful lives, the major individual components are depreciated over their individual useful lives. Maintenance costs and repairs are expensed as incurred. Annual depreciation rates are as follows: Network infrastructure 5 %-33% Buildings and leasehold improvement 2 %-33% Other assets 10 %-50% iv) The carrying value of property, plant and equipment is reviewed if there are indicators of impairment in such assets. If an asset’s recovery value is less than the asset’s net carrying value, the difference is recognized as an impairment loss. During the years ended December 31, 2016, 2017 and 2018, no impairment losses were recognized. v) Spare parts for network operation is valued using the average cost method, without exceeding its net realizable value. The valuation of inventory for network considered obsolete, defective or slow-moving, is reduced to their estimated net realizable value. The estimate of the recovery value of inventories is based on their age and turnover. k) Intangibles i) Licenses Licenses to operate wireless telecommunications networks granted by the governments of the countries in which the Company operates are recorded at acquisition cost or at fair value at their acquisition date, net of accumulated amortization. Certain licenses require payments to the governments, such payments are recognized in the cost of service and equipment. The licenses that in accordance with government requirements are categorized as automatically renewable, for a nominal cost and with substantially consistent terms, are considered by the Company as intangible assets with an indefinite useful life. Accordingly, they are not amortized. Licenses are amortized when the Company does not have a basis to conclude that they are indefinite lived. Licenses are amortized using the straight-line method over a period ranging from 3 to 30 years, which represents the usage period of the assets. The Company has conducted an internal analysis on the applicability of the International Financial Reporting Interpretation Committee (“IFRIC”) No. 12 (Service Concession Agreements) and has concluded that its concessions are outside the scope of IFRIC 12. To determine the applicability of IFRIC 12, the Company analyzes each concession or group of similar concessions in a given jurisdiction. As a threshold matter, the Company identifies those government concessions that provide for the development, financing, operation or maintenance of infrastructure used to render a public service, and that set out performance standards, mechanisms for adjusting prices and arrangements for arbitrating disputes. With respect to those services, the Company evaluates whether the grantor controls or regulates (i) what services the operator must provide, (ii) to whom it must provide them and (iii) the applicable price (the “Services Criterion”). In evaluating whether the applicable government, as grantor, controls the price at which the Company provides its services, the Company looks at the terms of the concession agreement according to all applicable regulations. If the C

Cash and Cash Equivalents

Cash and Cash Equivalents	12 Months Ended
	Dec. 31, 2018
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Cash and Cash Equivalents	3. Cash and Cash Equivalents Cash and cash equivalents are comprised of short-term deposits with different financial institutions. Cash equivalents only include instruments with purchased maturity of less than three months. The amount includes the amount deposited, plus any interest earned.

Equity investments at fair valu

Equity investments at fair value through OCI and other short-term investments	12 Months Ended
	Dec. 31, 2018
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Equity investments at fair value through OCI and other short-term investments	4. Equity investments at fair value through OCI and other short-term investments As of December 31, 2017 and 2018, equity investments at fair value through OCI and other short-term investments includes an equity investments in KPN for Ps. 46,682,657 and Ps. 39,028,083, respectively, and other short-term investments for Ps. 12,438,019 and Ps. 9,987,851, respectively. The investment in KPN is carried at fair value with changes in fair value being recognized through other comprehensive (loss) items (equity) in the Company’s consolidated statements of financial position. As of December 31, 2017 and 2018, the Company has recognized in equity changes in fair value of the investment of Ps. 622,424 and Ps. (3,765,688), respectively, net of deferred taxes, through other comprehensive (loss) gain items in equity. During the years ended December 31, 2016, 2017 and 2018, the Company received dividends from KPN for an amount of Ps. 5,740,092, Ps. 2,370,559 and Ps. 2,605,333, respectively; which are included within “Valuation of derivatives, interest cost from labor obligations, and other financial items, net” in the consolidated statements of comprehensive income. Another short-term investment item of Ps. 9,987,851, as of December 31, 2018 (Ps. 12,438,019 in 2017) represents a cash deposit used to guarantee a short-term obligation for one of the Company’s foreign subsidiaries and are presented at their carrying value, which approximates fair value.

Accounts receivable from subscr

Accounts receivable from subscribers, distributors, recoverable taxes contractual assets and other, net	12 Months Ended
	Dec. 31, 2018
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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) At December 31, 2017 2018 Subscribers and distributors Ps. 178,722,706 Ps. 173,053,226 Telecommunications carriers for network interconnection and other services 8,671,416 5,543,263 Recoverable taxes (i) 40,477,188 46,706,298 Sundry debtors 14,736,340 12,685,281 Contractual assets (Note 2i, a) — 34,718,749 Impairment of trade receivables (39,044,925 ) (40,798,025 ) Total net Ps. 203,562,725 Ps. 231,908,792 Non-current 9,786,581 15,681,872 Total current subscribers, distributors and contractual assets Ps. 193,776,144 Ps. 216,226,920 (i) In accordance with the favorable resolution obtained from the authorities, in 2018 the subsidiary Claro Brasil recognized a benefit for the exclusion of the Tax on the Circulation of Goods and the Provision of Services (Imposto sobre a Circulação de Mercadorias e Prestação de Serviços, or “ICMS “) in the calculation bases of the Social Integration Program (Social Integration Program, or” PIS “) and the Contribution for the Financing of Social Security (Contribution to or Financing of Social Security, or” COFINS “) in the amount total of Ps. 12,295,869, that includes interest of Ps. 6,127,656. The asset was recognized based on the certainty of obtaining the economic benefit. b) Changes in the allowance for expected credit losses is as follows: For the years ended December 31, 2016 2017 2018 Balance at beginning of year Ps. (27,495,158 ) Ps. (37,351,677 ) Ps. (39,044,925 ) Increases recorded in expenses (16,987,769 ) (20,766,362 ) (19,535,707 ) Adjustment on initial application of IFRS 9 (Note 2i, b) — — (2,400,783 ) Write-offs 12,587,567 17,713,992 15,497,254 Translation effect (5,456,317 ) 1,359,122 4,686,136 Balance at end of year Ps. (37,351,677 ) Ps. (39,044,925 ) Ps. (40,798,025 ) c) The following table shows the aging of accounts receivable at December 31, 2017 and 2018, for subscribers and distributors: Past due Total Unbilled services a-30 days 31-60 61-90 Greater than December 31, 2017 Ps. 178,722,706 Ps. 78,384,174 Ps. 46,758,825 Ps. 6,780,671 Ps. 4,375,188 Ps. 42,423,848 December 31, 2018 Ps. 173,053,226 Ps. 62,623,654 Ps. 46,816,302 Ps. 6,315,277 Ps. 4,168,952 Ps. 53,129,041 d) The following table shows the accounts receivable from subscribers and distributors included in the impairments of trade receivables, as of December 31, 2017 and 2018: Total 1-90 Greater than December 31, 2017 Ps. 39,044,925 Ps. 3,807,945 Ps. 35,236,980 December 31, 2018 Ps. 40,798,025 Ps. 4,079,803 Ps. 36,718,222 e) An analysis of contract assets and liabilities at December 31, 2018 is as follows: 2018 Contract Assets: Balance at the beginning of the year Ps. 29,640,953 Additions 32,029,279 Disposals (25,243,487 ) Translation effect (1,707,996 ) Balance at the end of the year Ps. 34,718,749 Non-current Ps. 5,437,263 Current portion contracts assets Ps. 29,281,486

Related Parties

Related Parties	12 Months Ended
	Dec. 31, 2018
Text block [abstract]
Related Parties	6. Related Parties a) The following is an analysis of the balances with related parties as of December 31, 2017 and 2018. All of the companies were considered affiliates of América Móvil since the Company’s principal shareholders are either direct or indirect shareholders in the related parties. 2017 2018 Accounts receivable: Sears Roebuck de México, S.A. de C.V. Ps. 211,491 Ps. 264,976 Sanborns Hermanos, S.A. 91,233 312,706 Patrimonial Inbursa, S.A. 246,874 214,180 Carso Infraestructura y Construcción, S.A. de C.V. and Subsidiaries 89,585 179,852 Grupo Condumex, S.A. de C.V. and Subsidiaries 47,269 35,007 Operadora de Sites Mexicanos, S.A. de C.V. 14,252 16,634 Other 167,526 240,250 Total Ps. 868,230 Ps. 1,263,605 2017 2018 Accounts payable: Carso Infraestructura y Construcción, S.A. de C.V. and Subsidiaries Ps. 947,761 Ps. 1,403,414 Grupo Condumex, S.A. de C.V. and Subsidiaries 812,427 784,678 Grupo Financiero Inbursa, S.A.B. de C.V. 38,847 235,745 Fianzas Guardiana Inbursa, S.A. de C.V. 276,633 227,014 PC Industrial, S.A. de C.V. and Subsidiaries 136,859 83,502 Enesa, S.A. de C.V. and Subsidiaries 50,609 22,630 Other 277,276 217,230 Total Ps. 2,540,412 Ps. 2,974,213 For the years ended December 31, 2016, 2017 and 2018, the Company has not recorded any impairment of receivables in connection with amounts owed by related parties. b) For the years ended December 31, 2016, 2017 and 2018, the Company conducted the following transactions with related parties: 2016 2017 2018 Investments and expenses: Construction services, purchases of materials, inventories and property, plant and equipment (i) Ps. 9,917,280 Ps. 11,030,944 Ps. 7,211,960 Rent of towers 4,748,503 5,326,366 6,168,592 Insurance premiums, fees paid for administrative and operating services, brokerage services and others (ii) 4,118,469 4,135,578 4,134,380 Other services 1,899,818 2,802,667 1,864,017 Ps. 20,684,070 Ps. 23,295,555 Ps. 19,378,949 Revenues: Revenues services Ps. 411,076 Ps. 416,047 Ps. 679,220 Sales of equipment 2,679,591 2,313,840 1,296,204 Ps. 3,090,667 Ps. 2,729,887 Ps. 1,975,424 i) In 2018, this amount includes Ps.5,622,791 (Ps. 9,829,991 in 2017 and Ps. 9,547,530 in 2016) for network construction services and construction materials purchased from subsidiaries of Grupo Carso, S.A.B. de C.V. (Grupo Carso). ii) In 2018, this amount includes Ps. 778,191 (Ps. 789,253 in 2017 and Ps. 812,247 in 2016) for network maintenance services performed by Grupo Carso subsidiaries; Ps. 13,784 in 2018 (Ps. 15,695 in 2017, and Ps. 705,074 in 2016) for software services provided by an associate; Ps. 2,541,703 in 2018 (Ps. 3,330,038 in 2017 and Ps. 2,406,058 in 2016) for insurance premiums with Seguros Inbursa S.A. and Fianzas Guardiana Inbursa, S.A., which, in turn, places most of such insurance with reinsurers. c) The aggregate compensation paid to the Company’s, directors (including compensation paid to members of the Audit and Corporate Practices Committee), and senior management in 2018 was approximately Ps. 5,300 and Ps. 70,100, respectively. None of the Company’s directors is a party to any contract with the Company or any of its subsidiaries that provides for benefits upon termination of employment. The Company does not provide pension, retirement or similar benefits to its directors in their capacity as directors. The Company’s executive officers are eligible for retirement and severance benefits required by Mexican law on the same terms as all other employees. d) Österreichische Bundes- und Industriebeteiligungen GmbH (ÖBIB) is considered a related party due to it is a significant non-controlling

Derivative Financial Instrument

Derivative Financial Instruments	12 Months Ended
	Dec. 31, 2018
Text block [abstract]
Derivative Financial Instruments	7 Derivative Financial Instruments To mitigate the risks of future increases in interest rates and foreign exchange rates for the servicing of its debt, the Company has entered into derivative contracts in over-the-counter An analysis of the derivative financial instruments contracted by the Company at December 31, 2017 and 2018 is as follows: At December 31, 2017 2018 Instrument Notional amount in Fair Value Notional amount in Fair Value Assets: Swaps US Dollar-Mexican peso US$ 2,800 Ps.4,766,102 US$ 3,490 Ps. 2,058,831 Swaps Euro-Mexican peso € — — — — Swaps Yen-US ¥ 13,000 521,270 ¥ 13,000 581,948 Forwards US Dollar-Mexican peso US$ 1,744 1,600,666 — — Forwards US Dollar-Brazilian US$ 100 44,280 US$ 150 126,287 Swaps Swiss Franc-US CHF 475 178,710 — — Swaps Euro-Brazilian € 450 359,671 € 300 1,080,552 Interest rate swap Ps.200 916 — — Forwards Brazilian Real-US Dollar — — BRL $ 2,823 1,107,630 Forwards Euro-Brazilian € 400 330,427 € 150 123,005 Forwards US Dollar-Swiss franc CHF 75 121,981 — — Forwards Euro-US € 204 113,361 € 710 209,295 Total Assets Ps. 8,037,384 Ps. 5,287,548 At December 31, 2017 2018 Instrument Notional amount in Fair Value Notional amount in Fair Value Liabilities: Swaps US Dollar-Euro US$ 2,092 Ps. (8,340,970) US$ 2,025 Ps. (5,114,863) Swaps Pound sterling-Euro £ 740 (3,376,091) £ 740 (4,027,312) Swap Pound sterling-US £ 2,010 (1,676,636) £ 2,010 (5,836,607) Forwards US Dollar-Mexican Peso — — US$ 977 (772,704) Forwards Euro-US Dollar — — € 950 (333,586) Call spread option € 750 (48,422) — — Put option € 374 (482,645) € 374 (988,669) Call spread option € 3,000 (434,696) € 3,000 (33,838) Total Liabilities Ps. (14,359,460) Ps. (17,107,579) Non-current Ps. (3,756,921) Ps. (3,567,863) Total current liability Ps. (10,602,539) Ps. (13,539,716) The changes in the fair value of these derivative financial instruments for the years ended December 31, 2016, 2017 and 2018 amounted to a gain (loss) of Ps. (9,622,233), Ps. 8,192,567 and Ps. (4,686,407). Such amounts are included in the consolidated statements of comprehensive income as part of the caption “Valuation of derivatives interest cost from labor obligations and other financial items, net”. The maturities of the notional amount of the derivatives are as follows: Instrument Notional 2019 2020 2021 2022 2023 Thereafter Assets Swaps US Dollar-Mexican peso US$ — — — 1,600 1,890 Swaps Yen-US ¥ — — — — 13,000 Swaps Euro-Brazilian € 300 — — — — Forwards Brazilian Real-US Dollar BRL 1,680 — 1,143 — — Forwards Euro-Brazilian Real € 150 — — — — Forwards US Dollar-Brazilian Real US$ 150 — — — — Forwards Euro-US Dollar € 710 — — — — Liabilities Swaps US Dollar-Euro US$ 25 — — — 2,000 Swaps Pound sterling-Euro £ — — — — 740 Swap Pound sterling-US £ — 550 — — 1,460 Forwards US Dollar-Mexican Peso US$ 977 — — — — Forwards Euro-US Dollar € 950 — — — — Put option € — — — — 374 Call spread option € — 3,000 — — —

Inventories, net

Inventories, net	12 Months Ended
	Dec. 31, 2018
Text block [abstract]
Inventories, net	8. Inventories, net An analysis of inventories at December 31, 2017 and 2018 is as follows: 2017 2018 Mobile phones, accessories, computers, TVs, cards and other materials Ps. 42,262,511 Ps. 43,723,492 Less: Reserve for obsolete and slow-moving inventories (3,452,946 ) (3,418,130 ) Total Ps. 38,809,565 Ps. 40,305,362 For the years ended December 31, 2016, 2017 and 2018, the cost of inventories recognized in cost of sales was Ps. 172,495,376, Ps. 170,154,336 and Ps. 180,013,986 respectively.

Other assets, net

Other assets, net	12 Months Ended
	Dec. 31, 2018
Text block [abstract]
Other assets, net	9. Other assets, net An analysis of other assets at December 31, 2017 and 2018 is as follows: 2017 2018 Current portion: Advances to suppliers (different from PP&E and inventories) Ps. 9,536,654 Ps. 12,931,247 Prepaid insurance 683,091 949,590 Costs of mobile equipment and computers associated with deferred revenues 6,182,010 599,628 Other 950,991 815,728 Ps. 17,352,746 Ps.15,296,193 Non-current Recoverable taxes Ps. 12,249,372 Ps. 11,514,455 Prepayments for the use of fiber optics 4,361,668 3,985,216 Prepaid expenses and judicial deposits (1) 25,926,436 26,961,930 Total Ps. 42,537,476 Ps. 42,461,601 For the years ended December 31, 2016, 2017 and 2018, amortization expense for other assets was Ps. 1,340,609, Ps. 620,680 and Ps. 798,243, respectively. (1) Judicial deposits represent cash and cash equivalents pledged in order to fulfill the collateral requirements for tax contingencies mainly in Brazil. At December 31, 2017 and 2018, the amount for these deposits is Ps. 20,288,382 and Ps. 18,172,342, respectively. Based on its evaluation of the underlying contingencies, the Company believes that such amounts are recoverable.

Property, Plant and Equipment,

Property, Plant and Equipment, Net	12 Months Ended
	Dec. 31, 2018
Text block [abstract]
Property, Plant and Equipment, Net	10. Property, Plant and Equipment, net a) At December 31, Additions Retirements Business Translation Depreciation At December 31, Cost Network in operation and equipment Ps. 641,384,702 Ps. 101,794,197 Ps. (8,963,076 ) Ps. 1,873,445 Ps. 235,186,745 Ps. — Ps. 971,276,013 Land and buildings 54,794,386 2,900,511 (2,845,298 ) 3,839 7,281,973 — 62,135,411 Other assets 106,468,602 24,368,918 (10,717,096 ) 69,937 24,736,655 — 144,927,016 Construction in process and advances plant suppliers (1) 38,850,776 70,517,319 (70,911,593 ) 11,255 11,252,127 — 49,719,884 Spare parts for operation of the network 20,342,389 34,010,751 (27,641,919 ) 5,520 1,566,307 — 28,283,048 Total 861,840,855 233,591,696 (121,078,982 ) 1,963,996 280,023,807 — 1,256,341,372 Accumulated depreciation Network in operation and equipment 236,731,728 — (1,968,376 ) — 153,147,349 107,976,385 495,887,086 Buildings 4,567,588 — (975,284 ) — 3,709,952 3,179,066 10,481,322 Other assets 47,057,084 — (25,099,710 ) — 10,396,438 16,105,885 48,459,697 Spare parts for operation of the network (44,423 ) — (54,280 ) — 20,896 401,008 323,201 Total Ps. 288,311,977 Ps. — Ps. (28,097,650 ) Ps. — Ps. 167,274,635 Ps. 127,662,344 Ps. 555,151,306 Net Cost Ps. 573,528,878 Ps. 233,591,696 Ps. (92,981,332 ) Ps. 1,963,996 Ps. 112,749,172 Ps. (127,662,344 ) Ps. 701,190,066 At December 31, 2016 Additions Retirements Business Effect of Depreciation for the year At December 31, 2017 Cost Network in operation and equipment Ps. 971,276,013 Ps. 78,272,882 Ps. (21,657,715 ) Ps. 599,306 Ps.(38,824,540 ) Ps. — Ps. 989,665,946 Land and buildings 62,135,411 2,858,996 (415,219 ) 27,686 (2,022,685 ) — 62,584,189 Other assets 144,927,016 19,287,525 (8,112,571 ) 80,734 (5,866,897 ) — 150,315,807 Construction in process and advances plant suppliers (1) 49,719,884 66,383,381 (41,279,573 ) 34,705 (737,023 ) — 74,121,374 Spare parts for operation of the network 28,283,048 27,013,148 (27,979,816 ) 3,576 (728,358 ) — 26,591,598 Total 1,256,341,372 193,815,932 (99,444,894 ) 746,007 (48,179,503 ) — 1,303,278,914 Accumulated depreciation Network in operation and equipment 495,887,086 — (21,214,724 ) — (32,860,339 ) 110,533,486 552,345,509 Buildings 10,481,322 — (1,568,542 ) — (940,054 ) 2,682,559 10,655,285 Other assets 48,459,697 — (4,572,509 ) — (2,251,958 ) 21,724,299 63,359,529 Spare parts for operation of the network 323,201 — (9,205 ) — (4,339 ) 265,736 575,393 Total Ps. 555,151,306 Ps. — Ps. (27,364,980 ) Ps. — Ps.(36,056,690 ) Ps. 135,206,080 Ps. 626,935,716 Net Cost Ps. 701,190,066 Ps. 193,815,932 Ps. (72,079,914 ) Ps. 746,007 Ps. (12,122,813 ) Ps. (135,206,080 ) Ps. 676,343,198 At December 31, 2017 Additions Retirements Business Effect of foreign Depreciation for the year At December 31, 2018 Cost Network in operation and equipment Ps. 989,665,946 Ps. 68,900,443 Ps. (1,610,246 ) Ps. 128,246 Ps. (87,888,453 ) — Ps. 969,195,936 Land and buildings 62,584,189 4,429,433 (3,987,671 ) 8,874 (5,904,499 ) — 57,130,326 Other assets 150,315,807 25,268,252 (13,377,798 ) 2,578 (12,399,702 ) — 149,809,137 Construction in process and advances plant suppliers (1) 74,121,374 92,285,397 (76,978,798 ) 1,379 (8,336,823 ) — 81,092,529 Spare parts for operation of the network 26,591,598 49,380,349 (44,626,488 ) 1,939 (2,902,869 ) — 28,444,529 Total 1,303,278,914 240,263,874 (140,581,001 ) 143,016 (117,432,346 ) — 1,285,672,457 Accumulated depreciation Network in operation and equipment 552,345,509 — (28,712,096 ) — (67,907,227 ) 104,279,361 560,005,547 Buildings 10,655,285 — (2,311,442 ) — (2,157,996 ) 2,625,102 8,810,949 Other assets 63,359,529 — (2,418,837 ) — (6,579,983 ) 22,172,785 76,533,494 Spare parts for operation of the network 575,393 — (160,696 ) — (131,429 ) 38,479 321,747 Total Ps. 626,935,716 Ps. — Ps. (33,603,071 ) Ps. — Ps. (76,776,635 ) Ps. 129,115,727 Ps. 645,671,737 Net Cost Ps. 676,343,198 Ps.240,263,874 Ps. (106,977,930 ) Ps. 143,016 Ps. (40,655,711 ) Ps. (129,115,727 ) Ps. 640,000,720 (1) Construction in progress includes fixed and mobile network facilities as well as satellite developments and fiber optic which is in the process of being installed. The completion period of construction in progress is variable and depends upon the type of plant and equipment under construction. b) At December 31, 2017 and 2018, property, plant and equipment include the following assets under capital leases: 2017 2018 Assets under capital leases Ps. 8,116,532 Ps.7,770,681 Accumulated depreciation (3,475,014 ) (3,530,241 ) Ps. 4,641,518 Ps. 4,240,440 c) At December 31, 2018 and 2017, Claro Brasil has land and buildings and other equipment that are pledged in guarantee of legal proceedings in the amount of Ps.3,166,882 and Ps. 3,521,082, respectively. d) Relevant information related to the computation of the capitalized borrowing costs is as follows: Year ended December 31, 2016 2017 2018 Amount invested in the acquisition of qualifying assets Ps. 52,974,400 Ps. 49,642,370 Ps. 45,456,630 Capitalized interest 2,861,307 2,875,034 2,020,288 Capitalization rate 5.4% 5.8% 4.4% Capitalized interest is being amortized over a period of estimated useful life of the related assets. e) On October 20, 2017, our subsidiary Star One signed a contract with SSL — Space Systems Loral for construction of the Star One D2 satellite, which will be equipped with transponders 52 in the C and Ku bands, 20 Gbps of capacity in Band Ka and a certain capacity in X-band.

Intangible assets, net and good

Intangible assets, net and goodwill	12 Months Ended
	Dec. 31, 2018
Text block [abstract]
Intangible assets, net and goodwill	11. Intangible assets, net and goodwill a) For the year ended December 31, 2016 Balance at Acquisitions Acquisitions Disposals and Amortization Effect of Balance at end Licenses and rights of use Ps. 175,295,775 Ps. 9,129,949 Ps. 360,144 Ps. 1,269,478 Ps. — Ps. 56,684,016 Ps. 242,739,362 Accumulated amortization (84,846,524 ) — — — (10,255,271 ) (31,606,303 ) (126,708,098 ) Net 90,449,251 9,129,949 360,144 1,269,478 (10,255,271 ) 25,077,713 116,031,264 Trademarks 22,824,013 — 101,655 (13,820 ) — 4,877,302 27,789,150 Accumulated amortization (11,523,707 ) — — — (330,576 ) (3,367,974 ) (15,222,257 ) Net 11,300,306 — 101,655 (13,820 ) (330,576 ) 1,509,328 12,566,893 Customer relationships 18,394,407 — 1,904,503 — — 5,946,598 26,245,508 Accumulated amortization (3,962,875 ) — — — (3,231,518 ) (5,240,681 ) (12,435,074 ) Net 14,431,532 — 1,904,503 — (3,231,518 ) 705,917 13,810,434 Software licenses 8,782,768 3,854,066 26,871 (829,680 ) — 1,040,771 12,874,796 Accumulated amortization (2,424,598 ) (41,185 ) (8,367 ) 829,680 (3,469,461 ) (9,809 ) (5,123,740 ) Net 6,358,170 3,812,881 18,504 — (3,469,461 ) 1,030,962 7,751,056 Content rights 2,634,527 2,242,556 — (217,057 ) — 216,272 4,876,298 Accumulated amortization (428,746 ) — — (1,612 ) (2,236,141 ) — (2,666,499 ) Net 2,205,781 2,242,556 — (218,669 ) (2,236,141 ) 216,272 2,209,799 Total of intangibles, net Ps. 124,745,040 Ps. 15,185,386 Ps. 2,384,806 Ps. 1,036,989 Ps. (19,522,967 ) Ps. 28,540,192 Ps. 152,369,446 Goodwill (Note 12) Ps. 137,113,716 Ps. — Ps. 3,953,023 Ps. (356,832 ) Ps. — Ps. 11,922,728 Ps. 152,632,635 For the year ended December 31, 2017 Balance at Acquisitions Acquisitions Disposals and Amortization Effect of Balance at end of year Licenses and rights of use Ps. 242,739,362 Ps. 12,347,051 Ps. 53,923 Ps. (1,037,458 ) Ps. — Ps. (6,689,054 ) Ps. 247,413,824 Accumulated amortization (126,708,098 ) — — 244,564 (11,879,489 ) 4,233,585 (134,109,438 ) Net 116,031,264 12,347,051 53,923 (792,894 ) (11,879,489 ) (2,455,469 ) 113,304,386 Trademarks 27,789,150 127,823 82,868 (29,804 ) — 809,175 28,779,212 Accumulated amortization (15,222,257 ) — — 34,464 (3,179,461 ) (474,151 ) (18,841,405 ) Net 12,566,893 127,823 82,868 4,660 (3,179,461 ) 335,024 9,937,807 Customer relationships 26,245,508 — 512,667 (882,338 ) — 1,109,877 26,985,714 Accumulated amortization (12,435,074 ) — — 882,338 (3,769,777 ) (806,982 ) (16,129,495 ) Net 13,810,434 — 512,667 — (3,769,777 ) 302,895 10,856,219 Software licenses 12,874,796 3,351,200 — (1,698,118 ) — 527,720 15,055,598 Accumulated amortization (5,123,740 ) — — 1,212,669 (3,699,363 ) (204,727 ) (7,815,161 ) Net 7,751,056 3,351,200 — (485,449 ) (3,699,363 ) 322,993 7,240,437 Content rights 4,876,298 2,099,084 — (63,137 ) — (194,803 ) 6,717,442 Accumulated amortization (2,666,499 ) — — (195,658 ) (1,820,092 ) 165,584 (4,516,665 ) Net 2,209,799 2,099,084 — (258,795 ) (1,820,092 ) (29,219 ) 2,200,777 Total of intangibles, net Ps. 152,369,446 Ps. 17,925,158 Ps. 649,458 Ps. (1,532,478 ) Ps. (24,348,182 ) Ps. (1,523,776 ) Ps. 143,539,626 Goodwill (Note 12) Ps. 152,632,635 Ps. — Ps. 951,348 Ps. (134,525 ) Ps. — Ps. (1,986,226 ) Ps. 151,463,232 For the year ended December 31, 2018 Balance at Acquisitions Acquisitions Disposals and Amortization Effect of and Hyperinflation adjustment Balance at end of year Licenses and rights of use Ps. 247,413,824 Ps. 4,227,244 — Ps. 1,508,274 — Ps. (19,670,368 ) Ps. 233,478,974 Accumulated amortization (134,109,438 ) — — (1,005,877 ) (11,347,089 ) 16,281,825 (130,180,579 ) Net 113,304,386 4,227,244 502,397 (11,347,089 ) (3,388,543 ) 103,298,395 Trademarks 28,779,212 159,958 6,631 — (738,635 ) 28,207,166 Accumulated amortization (18,841,405 ) — — — (4,973,602 ) 275,046 (23,539,961 ) Net 9,937,807 159,958 6,631 — (4,973,602 ) (463,589 ) 4,667,205 Customer relationships 26,985,714 74,637 15,556 — (1,532,839 ) 25,543,068 Accumulated amortization (16,129,495 ) — (3,754,312 ) 1,122,270 (18,761,537 ) Net 10,856,219 74,637 15,556 — (3,754,312 ) (410,569 ) 6,781,531 Software licenses 15,055,598 2,004,550 3,006 (905,610 ) — (1,848,286 ) 14,309,258 Accumulated amortization (7,815,161 ) — 2,677,848 (3,491,629 ) 924,139 (7,704,803 ) Net 7,240,437 2,004,550 3,006 1,772,238 (3,491,629 ) (924,147 ) 6,604,455 Content rights 6,717,442 850,779 — — — (18,512 ) 7,549,709 Accumulated amortization (4,516,665 ) — — — (2,231,978 ) (14,949 ) (6,763,592 ) Net 2,200,777 850,779 — — (2,231,978 ) (33,461 ) 786,117 Total of intangibles, net Ps. 143,539,626 Ps. 7,317,168 Ps. 25,193 Ps. 2,274,635 Ps. (25,798,610 ) Ps. (5,220,309 ) Ps. 122,137,703 Goodwill Ps. 151,463,232 Ps. 1,455 Ps. 333,284 Ps. (1,094,861 ) — Ps. (5,136,613 ) Ps. 145,566,497 b) The aggregate carrying amount of goodwill is allocated as follows: 2017 2018 Europe (7 countries) Ps. 53,143,542 Ps. 53,066,729 Brazil (Fixed, wireless and TV) 24,708,740 21,388,124 Puerto Rico 17,463,394 17,463,394 Dominican Republic 14,186,723 14,186,723 Colombia 13,981,033 12,770,381 México 9,852,912 9,856,601 Peru 3,958,110 3,086,981 Chile 2,834,134 2,576,214 El Salvador 2,510,577 2,510,577 Ecuador 2,155,385 2,155,385 Other countries 6,668,682 6,505,388 Ps. 151,463,232 Ps. 145,566,497 c) The following is a description of the major changes in the “Licenses and rights of use” caption during the years ended December 31, 2016, 2017 and 2018: 2016 Acquisitions i) In February 2016, the Company´s subsidiary in Paraguay was granted with the use of 30 MHz of spectrum in the 1700/2100 Mhz frequency. The total cost was Ps. 830,719 (US$ 46,000). ii) In February 2016, the Company through its subsidiary Radiomóvil Dipsa, S.A. de C.V. (Telcel), acquired through an auction a total of 20MHz in the national wide AWS-1 AWS-3 iii) In May 2016, Mtel, located in Bulgaria, acquired 2 x 5 MHz in the 1,800-MHz iv) On May 26, 2016, the Company’s subsidiary in Peru acquired spectrum in a public auction of the 700 MHz band. The frequency band expires in 2036. The cost of the spectrum was Ps. 5,627,316 (PEN$. 1,002,523). v) In July 2016, Ecuador Telecom acquired a license to operate TV in Ecuador for a period that ends in 2031. The amount paid was Ps. 27,700 (US$ 1,500). 2017 Acquisitions i) In 2017, Claro Brasil increased its licenses value by Ps. 3,592,034 due to the cleaning process of the 700 MHz national frequency acquired in September 2014. ii) On February 24, 2017 Radiomóvil Dipsa renewed its 8.4 MHz national license by paying Ps. 917,431, and on July 14, 2017, it acquired 43 concession titles for frequencies of 2.5 GHz in the amount of Ps. 5,305,498. iii) Additionally, in 2017, the Company acquired other licenses in Chile, Europe, Uruguay and others countries in the amount of Ps. 2,532,088. 2018 Acquisitions i. In December, Dominican Republic acquired radio spectrum totaling Ps 709,829 (RD$ 1,831,427) with a useful life of 11 years. ii. Additionally, in 2018, the Company acquired other licenses in Paraguay, Puerto Rico, Europe, Argentina, Chile and others countries in the amount of Ps. 3,517,415. Amortization of intangibles for the years ended December 31, 2016, 2017 and 2018 amounted to Ps. 19,522,968, Ps. 24,348,182and Ps. 25,798,610 respectively. Some of the jurisdictions in which the Company operates can revoke their concessions under certain circumstances such as imminent danger to national security, national economy and natural disasters.

Business combinations, acquisit

Business combinations, acquisitions, sale and non-controlling interest	12 Months Ended
	Dec. 31, 2018
Text block [abstract]
Business combinations, acquisitions, sale and non-controlling interest	12. Business combinations, acquisitions, sale and non-controlling a) Acquisitions and sale 2016 a) In January 2016, in order to expand and strengthen its operations in Brazil, the Company through its Brazilian subsidiary, acquired a controlling interest of 99.99% in Brazil Telecomunicações S.A. (“BRTel”), a company operating in the market for Pay TV, Internet and broadband services and serving various municipalities of Brazil under the BLUE brand. The amount paid for the business acquisition was Ps. 1,088,668, net of acquired cash. The goodwill recognized amounted to Ps. 1,046,253. b) In May 2016, the Company acquired an additional non-controlling c) In May 2016, the Company through his subsidiary, América Móvil Perú, S.A.C. acquired 100% of the capital stock of Olo del Perú S.A.C. (“Olo”), and TVS Wireless S.A.C. (“TVS”). Olo and TVS provide telecommunications services throughout Peru and hold radio spectrum in the 2.5 GHz band. The transaction was conditioned to the obtention of the approval of the Peruvian regulator, such approval was finally obtained in December 2016. The amount of the transaction was Ps. 1,854,379 (US$. 102,343) net of acquired cash. In May 2016 the Company paid Ps. 152,214 (US$ 7,554) and in January 2017, after the approval, Ps. 2,079,095 (US$ 94,789). The goodwill recognized amounted to Ps. 1,454,333 in December 2016, Ps. 188,452 in December 2017 and Ps. 329,366 in December 2018. d) Based on a 2014 shareholder agreement, the Company agreed to ensure a minimal free float of Telekom Austria shares in the market. Consequently, in July 2016, the Company sold shares corresponding to 7.8% of the outstanding common stock of Telekom Austria AG. This sale reduced the overall shareholding of América Movil in Telekom Austria AG from 59.70% to 51.89%. Additionally, in August 2016, the Company sold 0.89% of the outstanding common stock of Telekom Austria AG. Following the successful completion of this transaction, AMX’s stake was reduced to 51.0%. The amount of cash received for these transactions was Ps. 6,323,336. As América Móvil still retains control over Telekom Austria AG, these transactions were recorded as equity transactions. e) In September 2016, the Company, through his subsidiary Tracfone, acquired certain assets of T-Mobile, f) In November 2016, Telekom Austria Group acquired 100% of the Belarusian fixed-line operator Atlant Telecom (Atlant) and its subsidiary TeleSet. After the acquisition, Atlant was renamed velcom ACS. Both companies are the leading privately owned fixed-line operators in Belarus offering fixed-line broadband, IPTV and cable TV as well as a video and audio library. The acquisition of Atlant and TeleSet is a further step in Telekom Austria Group’s convergence strategy. The final allocation of consideration transferred will be determined once all necessary information regarding identifiable assets is available. The amount paid for the business acquisition was Ps. 582,931, net of acquired cash. The goodwill recognized amounted to Ps. 200,973. Acquisitions 2017 a) In February 2017, Telekom Austria Group acquired 97.68% of Metronet telekomunikacije through its Croatian subsidiary Vipnet. Metronet is one of the leading alternative fixed business solutions providers in Croatia. The fair values of the assets acquired and liabilities assumed at the acquisition date are reported in the Europe segment. The amount paid for the business acquisition was Ps. 1,550,534, net of acquired cash. The goodwill recognized amounted to Ps. 502,574. b) During 2017, the Company acquired through its subsidiaries, other entities for which if paid Ps. 3,249,164, net of acquired cash. The identified goodwill has been allocated to the Europe segment. The goodwill recognized amounted to Ps. 260,355. c) The Company acquired an additional non-controlling b) Consolidated subsidiaries with non-controlling The Company has control over Telekom Austria, which has a material non-controlling Selected financial data from the statements of financial position December 31, 2017 2018 Assets: Current assets Ps. 29,128,486 Ps. 29,854,542 Non-current 150,225,260 131,407,408 Total assets Ps. 179,353,746 Ps. 161,261,950 Liabilities and equity: Current liabilities Ps. 30,192,384 Ps. 36,822,034 Non-current 89,048,150 80,023,800 Total liabilities 119,240,534 116,845,834 Equity attributable to equity holders of the parent 25,808,318 22,621,625 Non-controlling (1) 34,304,894 21,794,491 Total equity Ps. 60,113,212 Ps. 44,416,116 Total liabilities and equity Ps. 179,353,746 Ps. 161,261,950 (1) In 2017 this amount includes Ps. 14,942,886 for the subordinated perpetual fixed rate bond (see Note 19). Summarized statements of comprehensive income For the year ended December 31, 2016 2017 2018 Operating revenues Ps. 85,185,177 Ps. 93,644,173 Ps. 100,716,444 Operating costs and expenses 81,590,233 86,920,692 95,984,880 Operating income Ps. 3,594,944 Ps. 6,723,481 Ps. 4,731,564 Net income Ps. 7,065,770 Ps. 5,656,132 Ps. 3,809,694 Total comprehensive income Ps. 8,450,837 Ps. 7,737,797 Ps. 5,047,838 Net income attributable to: Equity holders of the parent Ps. 3,241,556 Ps. 2,884,627 Ps. 1,942,944 Non-controlling 3,824,214 2,771,505 1,866,750 Ps. 7,065,770 Ps. 5,656,132 Ps. 3,809,694 Comprehensive income attributable to: Equity holders of the parent Ps. 4,311,801 Ps. 3,978,263 Ps. 2,574,397 Non-controlling 4,139,036 3,759,534 2,473,441 Ps. 8,450,837 Ps. 7,737,797 Ps. 5,047,838

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2018
Text block [abstract]
Income Taxes	13. Income Taxes As explained previously in these consolidated financial statements, the Company is a Mexican corporation which has numerous consolidated subsidiaries operating in different countries. Presented below is a discussion of income tax matters that relates to the Company’s consolidated operations, its Mexican operations and significant foreign operations. i) Consolidated income tax matters The composition of income tax expense for the years ended December 31, 2016, 2017 and 2018 is as follows: 2016 2017 2018 In Mexico: Current year income tax Ps. 14,316,005 Ps. 16,568,274 Ps. 28,572,414 Deferred income tax (12,086,232 ) 2,582,287 (2,688,727 ) Foreign: Current year income tax 15,367,903 13,524,729 19,898,728 Deferred income tax (6,198,820 ) (7,733,779 ) 694,664 Ps. 11,398,856 Ps. 24,941,511 Ps. 46,477,079 Deferred tax related to items recognized in OCI during the year: For the years ended December 31, 2016 2017 2018 Remeasurement of defined benefit plans Ps. (7,734,732 ) Ps. 3,032,403 Ps. 408,735 Effect of financial instruments acquired for hedging purposes (21,046 ) (5,337 ) Equity investments at fair value 2,858,452 (266,753 ) 1,613,667 Other 136,879 — (8,922 ) Deferred tax benefit (expense) recognized in OCI Ps. (4,760,447 ) Ps. 2,760,313 Ps. 2,013,480 A reconciliation of the statutory income tax rate in Mexico to the consolidated effective income tax rate recognized by the Company is as follows: Year ended December 31, 2016 2017 2018 Statutory income tax rate in Mexico 30.0% 30.0% 30.0% Impact of non-deductible non-taxable Tax inflation effects 15.9% 17.8% 7.3% Derivatives 8.0% 1.0% 0.4% Employee benefits 4.4% 2.2% 1.3% Other 9.8% 2.6% 6.3% Effective tax rate on Mexican operations 68.1% 53.6% 45.3% Use of unrecognized tax credits in Brazil (0.6% ) (0.4% ) — Equity interest in net loss of associated companies (0.2% ) — — Dividends received from associates (7.9% ) (1.2% ) (0.8% ) Foreign subsidiaries and other non-deductible (10.8% ) (8.3% ) 1.5% Effective tax rate 48.6% 43.7% 46.0% An analysis of temporary differences giving rise to the net deferred tax liability is as follows: Consolidated statements of financial position Consolidated statements of comprehensive income 2017 2018 2016 2017 2018 Provisions Ps.26,268,666 Ps.20,781,421 Ps.1,622,132 Ps.1,579,604 Ps.1,841,705 Deferred revenues 7,461,802 6,866,120 (12,128 ) (965,010 ) 3,632,051 Tax losses carry forward 38,332,408 27,881,491 12,706,245 (323,506 ) (5,833,660 ) Property, plant and equipment (1) (9,929,129 ) (11,756,590 ) 2,445,783 1,974,753 453,493 Inventories 2,003,049 2,106,976 (229,571 ) 519,046 81,270 Licenses and rights of use (1) (2,455,877 ) (3,896,788 ) 54,182 348,201 961,402 Employee benefits 33,253,071 33,673,874 3,616,952 1,225,310 1,128,209 Other 9,639,995 10,956,823 (1,918,543 ) 793,094 (270,407 ) Net deferred tax assets Ps.104,573,985 Ps.86,613,327 Deferred tax expense in net profit for the year Ps.18,285,052 Ps.5,151,492 Ps.1,994,063 (1) As of December 31, 2018, the balance included the effects of hyperinflation. Reconciliation of deferred tax assets and liabilities, net: 2016 2017 2018 Opening balance as of January 1, Ps. 69,817,147 Ps. 98,589,818 Ps. 104,573,985 Deferred tax benefit 18,285,052 5,151,492 1,994,063 Translation effect 15,273,228 (1,687,276 ) (8,854,010 ) Deferred tax benefit (expense) recognized in OCI (4,760,447 ) 2,760,313 2,013,480 Deferred taxes acquired in business combinations (25,162 ) (240,362 ) (25,827 ) Hyperinflationary effect in Argentina — — (4,907,151 ) Effect of adoption of IFRS 9 (Note 2ai) — — 544,628 Effect of adoption of IFRS 15 (Note 2ai) — — (8,725,841 ) Closing balance as of December 31, Ps. 98,589,818 Ps. 104,573,985 Ps. 86,613,327 Presented in the consolidated statements of financial position as follows: Deferred income tax assets Ps. 112,651,699 Ps. 116,571,349 Ps. 111,186,768 Deferred income tax liabilities (14,061,881 ) (11,997,364 ) (24,573,441 ) Ps. 98,589,818 Ps. 104,573,985 Ps. 86,613,327 The deferred tax assets are in tax jurisdictions in which the Company considers that based on financial projections of its cash flows, results of operations and synergies between subsidiaries, will generate sufficient taxable income in subsequent periods to utilize or realize such assets. The Company does not recognize a deferred tax liability related to the undistributed earnings of its subsidiaries, because it currently does not expect these earnings to be taxable or to be repatriated in the near future. The Company’s policy has been to distribute the profits when it has paid the corresponding taxes in its home jurisdiction and the tax can be accredited in Mexico. At December 31, 2017 and 2018, the balance of the contributed capital account (“CUCA”) is Ps. 510,832,194 and Ps. 536,278,717, respectively. On January 1, 2014, the Cuenta de Utilidad Fiscal Neta Corporate tax rate The income tax rate applicable in Mexico from 2016 through 2018 was 30%. ii) Significant foreign income tax matters a) Results of operations The foreign subsidiaries determine their taxes on profits based on their individual taxable income, in accordance with the specific tax regimes of each country. The combined income before taxes and the combined provision for taxes of such subsidiaries in 2016, 2017 and 2018 are as follows: 2016 2017 2018 Combined income before taxes Ps. 45,697,258 Ps. 38,286,046 Ps. 66,314,883 Combined tax provision differences deducible-not Ps. 9,169,083 Ps. 5,790,950 Ps. 20,593,392 The effective income tax rate for the Company’s foreign jurisdictions was 20% in 2016, 15% in 2017 and 31% in 2018 as shown in the table above. The statutory tax rates in these jurisdictions vary, although many approximate 21% to 40%. The primary difference between the statutory rates and the effective rates in 2016, 2017 and 2018 was attributable to dividends received from KPN and other non-deductible non-taxable iii) Tax losses a) At December 31, 2018, the available tax loss carryforwards recorded in deferred tax assets are as follows on a country by country basis: Country Balance of available tax Tax loss carryforward Brazil Ps. 59,695,441 Ps. 20,296,450 Austria 20,128,833 5,032,208 Mexico 6,043,603 1,813,081 Colombia 2,239,486 739,030 Nicaragua 2,403 722 Total Ps. 88,109,766 Ps. 27,881,491 b) bi) The Company believes that it is more likely than not that the accumulated balances of its net deferred tax assets are recoverable, based on the positive evidence of the Company to generate future taxable income related to the same taxation authority which will result in taxable amounts against which the available tax losses can be utilized before they expire. Positive evidence includes the Company’s recent restructure in 2017 of its operations in Brazil, resulting in an organizational structure that is anticipated to be more efficient and profitable and generated taxable income in 2018. bii) biii) The company estimates that there is positive evidence that allows it to use these losses, these should be reduced to the extent that it is considered likely that there will be sufficient taxable profits to allow them to recover in full or in part, the losses will only be compensated when there is a right legally required and are approved by the tax authorities in Mexico.

Debt

Debt	12 Months Ended
	Dec. 31, 2018
Text block [abstract]
Debt	14. Debt a) At December 31, 2017 (Thousands of Currency Loan Interest rate Maturity Total Senior Notes U.S. dollars Fixed-rate Senior notes (i) 5.000% 2019 Ps. 14,840,025 Fixed-rate Senior notes (i) 5.500% 2019 7,467,145 Fixed-rate Senior notes (i) 5.000% 2020 42,043,077 Fixed-rate Senior notes (i) 3.125% 2022 31,658,720 Fixed-rate Senior notes (i) 6.375% 2035 19,417,282 Fixed-rate Senior notes (i) 6.125% 2037 7,305,744 Fixed-rate Senior notes (i) 6.125% 2040 39,573,400 Fixed-rate Senior notes (i) 4.375% 2042 22,754,705 Subtotal U.S. dollars Ps. 185,060,098 Mexican pesos Domestic Senior notes (i) 8.110% 2018 Ps. 1,750,000 Domestic Senior notes (i) 8.270% 2018 1,160,110 Domestic Senior notes (i) 8.600% 2020 7,000,000 Domestic Senior notes (i) 0.000% 2025 4,409,873 Domestic Senior notes (i) 8.360% 2037 5,000,000 Fixed-rate Senior notes (i) 6.000% 2019 10,000,000 Fixed-rate Senior notes (i) 6.450% 2022 22,500,000 Fixed-rate Senior notes (i) 7.125% 2024 11,000,000 Fixed-rate Senior notes (i) 8.460% 2036 7,871,700 Subtotal Mexican pesos Ps. 70,691,683 Euros Fixed-rate Senior notes (i) 1.000% 2018 Ps. 14,252,360 Fixed-rate Senior notes (i) 4.125% 2019 23,753,933 Exchangeable Bonds (i) 0.000% 2020 67,504,878 Fixed-rate Senior notes (i) 3.000% 2021 23,753,933 Fixed-rate Senior notes (i) 3.125% 2021 18,727,775 Fixed-rate Senior notes (i) 4.000% 2022 19,333,685 Fixed-rate Senior notes (i) 4.750% 2022 17,815,450 Fixed-rate Senior notes (i) 3.500% 2023 7,594,262 Fixed-rate Senior notes (i) 3.259% 2023 17,815,450 Fixed-rate Senior notes (i) 1.500% 2024 20,190,843 Fixed-rate Senior notes (i) 1.500% 2026 17,815,450 Fixed-rate Senior notes (i) 2.125% 2028 15,440,057 Subtotal Euros Ps. 263,998,076 Pounds sterling Fixed-rate Senior notes (i) 5.000% 2026 Ps. 13,368,884 Fixed-rate Senior notes (i) 5.750% 2030 17,379,549 Fixed-rate Senior notes (i) 4.948% 2033 8,021,330 Fixed-rate Senior notes (i) 4.375% 2041 20,053,326 Subtotal Pounds sterling Ps. 58,823,089 Swiss francs Fixed-rate Senior notes (i) 1.125% 2018 Ps. 11,169,748 Subtotal Swiss francs Ps. 11,169,748 Brazilian reais Debenture (i) 102.900% of CDI 2020 Ps. 8,972,204 Promissory Note (i) 102.400% of CDI 2019 5,981,469 Debenture (i) 103.900% of CDI 2019 5,981,469 Subtotal Brazilian reais Ps. 20,935,142 Other currencies Japanese yen Fixed-rate Senior notes (i) 2.950% 2039 Ps. 2,282,608 Subtotal Japanese yen Ps. 2,282,608 Chilean pesos Fixed-rate Senior notes (i) 3.961% 2035 Ps. 4,312,424 Subtotal Chilean pesos Ps. 4,312,424 Subtotal other currencies Ps. 6,595,032 Hybrid Notes Euros Euro NC5 Series A Capital Securities (iii) 5.125% 2073 Ps. 21,378,540 Euro NC10 Series B Capital Securities (iii) 6.375% 2073 13,064,663 Subtotal Euros Ps. 34,443,203 Pounds sterling GBP NC7 Capital Securities (iii) 6.375% 2073 Ps. 14,705,772 Subtotal Pounds sterling Ps. 14,705,772 Subtotal Hybrid Notes Ps. 49,148,975 Lines of Credit and others U.S. dollars Lines of credit (ii) L + 0.200% and 1.500% - 7.250% 2018 - 2019 Ps. 14,474,350 Mexican pesos Lines of credit (ii) TIIE + 0.040% - TIIE + 0.175% 2018 - 2019 Ps. 12,500,000 Brazilian reais Lines of credit (ii) 107% of CDI - TJLP + 3.500% & 3.000% - 9.500% 2018 -2027 Ps. 4,389,260 Chilean pesos Financial Leases 8.700% - 8.970% 2018 - 2027 Ps. 99,446 Subtotal Lines of Credit and others Ps. 31,463,056 Total debt Ps. 697,884,899 Less: Short-term debt and current portion of long-term debt Ps. 51,745,841 Long-term debt Ps. 646,139,058 At December 31, 2018 (Thousands of Currency Loan Interest rate Maturity Total Senior Notes U.S. dollars Fixed-rate Senior notes (i) 5.000% 2019 Ps. 14,762,175 Fixed-rate Senior notes (i) 5.500% 2019 7,427,972 Fixed-rate Senior notes (i) 5.000% 2020 41,822,521 Fixed-rate Senior notes (i) 3.125% 2022 31,492,640 Fixed-rate Senior notes (i) 6.375% 2035 19,315,420 Fixed-rate Senior notes (i) 6.125% 2037 7,267,419 Fixed-rate Senior notes (i) 6.125% 2040 39,365,800 Fixed-rate Senior notes (i) 4.375% 2042 22,635,335 Subtotal U.S. dollars Ps. 184,089,282 Mexican pesos Fixed-rate Senior notes (i) 6.000% 2019 Ps. 10,000,000 Domestic Senior notes (i) 8.600% 2020 7,000,000 Fixed-rate Senior notes (i) 6.450% 2022 22,500,000 Fixed-rate Senior notes (i) 7.125% 2024 11,000,000 Domestic Senior notes (i) 0.000% 2025 4,629,425 Fixed-rate Senior notes (i) 8.460% 2036 7,871,700 Domestic Senior notes (i) 8.360% 2037 5,000,000 Subtotal Mexican pesos Ps. 68,001,125 Euros Fixed-rate Senior notes (i) 4.125% 2019 Ps. 22,558,572 Exchangeable Bonds (i) 0.000% 2020 64,107,851 Fixed-rate Senior notes (i) 3.000% 2021 22,558,572 Fixed-rate Senior notes (i) 3.125% 2021 17,568,739 Fixed-rate Senior notes (i) 4.000% 2022 18,028,031 Fixed-rate Senior notes (i) 4.750% 2022 16,918,929 Fixed-rate Senior notes (i) 3.500% 2023 7,132,481 Fixed-rate Senior notes (i) 3.259% 2023 16,918,929 Fixed-rate Senior notes (i) 1.500% 2024 19,174,786 Fixed-rate Senior notes (i) 1.500% 2026 16,918,929 Fixed-rate Senior notes (i) 2.125% 2028 14,663,072 Subtotal Euros Ps. 236,548,891 Pounds sterling Fixed-rate Senior notes (i) 5.000% 2026 Ps. 12,550,801 Fixed-rate Senior notes (i) 5.750% 2030 16,316,042 Fixed-rate Senior notes (i) 4.948% 2033 7,530,481 Fixed-rate Senior notes (i) 4.375% 2041 18,826,202 Subtotal Pounds sterling Ps. 55,223,526 Brazilian reais Debenture (i) 103.900% of CDI 2019 Ps. 5,079,720 Promissory notes (i) 102.400% of CDI 2019 5,079,720 Promissory notes (i) 103.205% of CDI 2019 1,828,699 Debenture (i) 102.900% of CDI 2020 7,619,580 Debenture (i) 104.000% of CDI 2021 5,587,692 Debenture (i) 104.250% of CDI 2021 7,695,776 Subtotal Brazilian reais Ps. 32,891,187 Other currencies Japanese yen Fixed-rate Senior notes (i) 2.950% 2039 Ps. 2,334,864 Subtotal Japanese yen Ps. 2,334,864 Chilean pesos Fixed-rate Senior notes (i) 3.961% 2035 Ps. 3,904,707 Subtotal Chilean pesos Ps. 3,904,707 Subtotal other currencies Ps. 6,239,571 Hybrid Notes Euros Euro NC10 Series B Capital Securities (iii) 6.375% 2073 Ps. 12,407,214 Subtotal Euros Ps. 12,407,214 Pounds sterling GBP NC7 Capital Securities (iii) 6.375% 2073 Ps. 13,805,881 Subtotal Pounds sterling Ps. 13,805,881 Subtotal Hybrid Notes 26,213,095 Lines of Credit and others U.S. dollars Lines of credit (ii) L + 0.200% and 1.500% - 8.950% 2019 - 2021 Ps. 11,698,885 Mexican pesos Lines of credit (ii) TIIE + 0.175% 2019 Ps. 4,500,000 Euros Lines of credit (ii) -0.100% - 0.000% 2019 Ps. 5,526,850 Brazilian reais Lines of credit (ii) 5.000% - 6.000% 2019 - 2027 Ps. 27,009 Peruvian Soles Lines of credit (ii) 4.700% - 12.100% 2019 Ps. 7,898,595 Chilean pesos Financial Leases 8.700% - 8.970% 2019 - 2027 Ps. 64,437 Subtotal Lines of Credit and others Ps. 29,715,776 Total debt Ps. 638,922,453 Less: Short-term debt and current portion of long-term debt Ps. 96,230,634 Long-term debt Ps. 542,691,819 L = LIBOR (London Interbank Offer Rate) TIIE = Mexican Interbank Rate EURIBOR = Euro Interbank Offered Rate CDI = Brazil Interbank Deposit Rate TJLP = Brazil Long Term Interest Rate Interest rates on the Company’s debt are subject to variances in international and local rates. The Company’s weighted average cost of borrowed funds at December 31, 2017, and December 31, 2018 was approximately 4.30% and 4.31%, respectively. Such rates do not include commissions or the reimbursements for Mexican tax withholdings (typically a tax rate of 4.9%) that the Company must pay to international lenders. An analysis of the Company’s short-term debt maturities as of December 31, 2017, and December 31, 2018, is as follows: 2017 2018 Obligations and Senior Notes Ps. 28,994,496 Ps. 67,365,810 Lines of credit 22,714,383 28,852,364 Financial Leases 36,962 12,460 Total Ps. 51,745,841 Ps. 96,230,634 Weighted average interest rate 4.0% 5.20% The Company’s long-term debt maturities as of December 31, 2018 are as follows: Years Amount 2020 Ps. 121,184,630 2021 54,189,122 2022 88,027,828 2023 and thereafter 279,290,239 Total Ps. 542,691,819 (i) Senior Notes The outstanding Senior Notes at December 31, 2017, and December 31, 2018, are as follows: Currency* 2017 2018 U.S. dollars Ps. 185,060,098 Ps. 184,089,282 Mexican pesos 70,691,683 68,001,125 Euros** 263,998,076 236,548,891 Pounds sterling** 58,823,089 55,223,526 Swiss francs 11,169,748 — Brazilian reais 20,935,142 32,891,187 Japanese yens 2,282,608 2,334,864 Chilean pesos 4,312,424 3,904,707 * Thousands of Mexican pesos ** Includes secured and unsecured senior notes. (ii) Lines of credit At December 31, 2017, and December 31, 2018, debt under lines of credit aggregated to Ps. $31,364 million and Ps. $29,651 million, respectively. The Company has two revolving syndicated credit facilities, one for the Euro equivalent of U.S. $2,000 million and the other for U.S. $2,500 million maturing in 2021 and 2019, respectively. As long as the facilities are committed, a commitment fee is paid. As of December 31, 2018, these credit facilities were undrawn. Telekom Austria has also an undrawn revolving syndicated credit facility in Euros for €1,000 million that matures in 2019. (iii) Hybrid Notes On September 2013, the Company issued three series of Capital Securities (hybrid notes) maturing in 2073: two series denominated in Euros for €1,450 million with a coupon of 5.125% and 6.375% respectively, and one series denominated in pounds sterling in the amount of £550 million with a coupon of 6.375%. The Capital Securities are deeply subordinated, and when they were issued the principal rating agencies stated that they would treat only half of the principal amount as indebtedness for purposes of evaluating our leverage (an analysis referred to as 50.0% equity credit). The Capital Securities are subject to redemption at our option at varying dates beginning in 2018 and 2023, respectively, for the euro-denominated series and beginning in 2020 for the sterling-denominated series. On September 2018, we exercised the option to call our hybrid bond with a maturity date in 2073 for a total amount of €900 million euros. KPN On September 2018, América Móvil delivered 224,695,844 KPN shares, equivalent to 5% of the total outstanding shares, after the maturity of a mandatory conversion bond with a nominal outstanding amount of €750 million Euros. The transaction represented the sale of those shares at an effective price of €3.3374 euros per share. Restrictions A portion of the debt is subject to certain restrictions with respect to maintaining certain financial ratios, as well as restrictions on selling a significant portion of groups of assets, among others. At December 31, 2018, the Company was in compliance with all these requirements. A portion of the debt is also subject to early maturity or repurchase at the option of the holders in the event of a change in control of the Company, as defined in each instrument. The definition of change in control varies from instrument to instrument; however, no change in control shall be considered to have occurred as long as its current shareholders continue to hold the majority of the Company’s voting shares. “Covenants” In conformity with the credit agreements, the Company is obliged to comply with certain financial and operating commitments. Such covenants limit in certain cases, the ability of the Company or the guarantor to: pledge assets, carry out certain types of mergers, sell all or substantially all of its assets, and sell control of Telcel. Such covenants do not restrict the ability of AMX’s subsidiaries to pay dividends or other payment distributions to AMX. The more restrictive financial covenants require the Company to maintain a consolidated ratio of debt to EBITDA (defined as operating income plus depreciation and amortization) that does not exceed 4 to 1, and a consolidated ratio of EBITDA to interest paid that is not below 2.5 to 1 (in accordance with the clauses included in the credit agreements). Several of the financing instruments of the Company may be accelerated, at the option of the debt holder in the case that a change in control occurs. At December 31, 2018, the Company was in compliance with all the covenants.

Accounts payable, accrued liabi

Accounts payable, accrued liabilities and asset retirement obligations	12 Months Ended
	Dec. 31, 2018
Text block [abstract]
Accounts payable, accrued liabilities and asset retirement obligations	15. Accounts payable, accrued liabilities and asset retirement obligations a) At December 31, 2017 2018 Suppliers Ps. 106,483,848 Ps. 118,406,380 Sundry creditors 91,842,929 91,087,197 Interest payable 8,930,561 8,535,519 Guarantee deposits from customers 1,460,286 1,421,336 Dividends payable 3,955,783 2,506,835 Total Ps. 212,673,407 Ps. 221,957,267 b) At December 31, 2017 2018 Current liabilities Direct employee benefits payable Ps. 16,673,627 Ps. 16,152,118 Contingencies 51,079,131 40,281,573 Total Ps. 67,752,758 Ps. 56,433,691 The movements in contingencies for the years ended December 31, 2017 and 2018 are as follows: Balance at December 31, Business Effect of Increase of Applications Balance at December 31, Payments Reversals Contingencies Ps. 50,766,070 Ps. 115,971 Ps. (648,685) Ps. 10,510,473 Ps. (7,618,520) Ps. (2,046,178) Ps. 51,079,131 Balance at December 31, Business Effect of Increase of Applications Balance at December 31, Payments Reversals Contingencies Ps. 51,079,131 Ps. 7,812 Ps. (5,729,826) Ps. 15,683,252 Ps. (6,203,329) Ps. (14,555,467) Ps. 40,281,573 Contingencies include tax, labor, regulatory and other legal type contingencies. See Note 16 c) for detail of contingencies. c) Balance at 2016 Effect of Increase of the year Applications Balance at 2017 Payments Reversals Asset retirement obligations Ps. 16,288,631 Ps. (119,928) Ps. 3,160,320 Ps. (126,088) Ps. (957,806) Ps. 18,245,129 Balance at Effect of Increase of Applications Balance at Payments Reversals Asset retirement obligations Ps. 18,245,129 Ps. (2,020,853) Ps. 1,062,745 Ps. (151,364) Ps. (1,164,056) Ps. 15,971,601 The discount rates used for the asset retirement obligation are based on market rates that are expected to be undertaken by the dismantling or restoration of cell sites, and may include labor costs.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2018
Text block [abstract]
Commitments and Contingencies	16. Commitments and Contingencies a) Leases At December 31, 2017 and 2018, the Company has entered into several lease agreements with related parties and third parties for the buildings where its offices are located (as a lessee), as well as with the owners of towers and or premises where the Company has installed radio bases. An analysis of the minimum rental payments for the next five years is shown below. In some cases, rental amounts are increased each year based on the National Consumer Price Index (INPC). The Company has the following non-cancelable Year ended December 31, 2019 Ps. 22,920 2020 13,365 2021 12,068 2022 10,751 2023 9,399 2024 and thereafter 34,011 Total Ps. 102,514 Less: amounts representing finance charges 23,837 Present value of net minimum lease payments 78,677 Less current portion 14,240 Long-term obligations Ps. 64,437 An analysis of non-cancellable Year ended December 31, 2019 Ps. 24,034,366 2020 22,104,366 2021 15,522,020 2022 14,250,332 2023 12,046,800 2024 and thereafter 49,991,937 Total Ps. 137,949,821 Rent expense for the years ended December 31, 2016, 2017 and 2018 was Ps. 32,300,963, Ps. 35,571,283 and Ps. 34,421,817, respectively. b) Commitments The Company and its subsidiaries have commitments that mature on different dates, referring to CAPEX and cell phone purchases. As of December 31, 2018, the total amounts equivalent to the contract period are detailed below: Year ended December 31, 2019 Ps. 88,233,626 2020 68,170,083 2021 55,358,156 2022 13,322,961 Total Ps. 225,084,826 c) Contingencies I. MEXICO Tax Assessment and Fine In 2014, the Mexican Tax Administration Service ( Servicio de Administración Tributaria In 2012, the SAT notified the Company and its subsidiary Sercotel, S.A. de C.V. (“Sercotel”) of a fine of approximately Ps. 1,400,000 for alleged tax improprieties arising from the transfer of certain accounts receivable from one of the Company’s subsidiaries to Sercotel. In 2014, the Company challenged the fine and a final resolution is pending. The Company has not established a provision in the accompanying consolidated financial statements for a loss arising from this fine, which the Company does not consider probable. Telcel Mobile Termination Rates The mobile termination rates between Telcel and other network operators have been the subject of various legal proceedings. With respect to the interconnection fees for 2017, 2018 and 2019, Telcel has challenged the applicable resolutions and final resolutions are pending. Given the fact that the “zero rate” that prevented Telcel from charging interconnection rates in its mobile network was held unconstitutional by the ( Suprema Corte de Justicia de la Nación The Company expects that mobile termination rates, as well as other rates applicable to mobile interconnection (such as transit), will continue to be the subject of litigation and administrative proceedings in Mexico. The Company cannot predict when or how these matters will be resolved or the financial effects of any such resolution. Class Action Lawsuits Telcel is subject to two class action lawsuits initiated by customers allegedly affected by Telcel’s quality of service and wireless and broadband rates. The Company cannot assess whether these class action lawsuits could have an adverse effect on the Company’s business and results of operations in the event that they are resolved against Telcel due to the lack of factual and legal claims underlying these proceedings. Consequently, the Company has not established a provision in the accompanying consolidated financial statements for a loss arising from these proceedings. IFT Proceedings Against Telmex In 2008, Telmex entered into certain commercial agreements with Dish México Holdings, S. de R.L. de C.V. and related companies (“Dish”), involving billing, collection services, distribution and equipment leasing. In addition, Telmex had an option to purchase shares representing 51% of the capital stock of Dish México, S. de R.L. de C.V. (“Dish México”). In 2014, Telmex waived its rights under the option. In 2015, the IFT imposed a fine of Ps. 14,414 on Telmex on the grounds that the IFT was not notified of an alleged merger ( concentración amparo In 2015, in relation with some Dish operations, the IFT initiated several proceedings in order to determine potential violations of (i) Telmex’s concession, with respect to an alleged indirect exploitation of a public television services concession, which in 2019, the appeal for relief was granted by a competent court ( Tribunal Colegiado) Constitución Política de los Estados Unidos Mexicanos Ley Federal de Telecomunicaciones y Radiodifusión re-transmission In 2018, the IFT imposed a fine of Ps. 2,543,937 on Telmex relating to a sanction procedure triggered by the alleged breach in 2013 and 2014 of certain minimum quality goals for link services. Telmex challenged this fine and a final resolution is pending. II. BRAZIL a. Tax Matters ICMS As of December 31, 2018, the Company’s Brazilian subsidiaries Claro Brasil, Primesys Soluções Empresariais S.A. (“Primesys”), Telmex Do Brasil Ltda. (“TdB”), Americel S.A. (“Americel”), Brasil Telecomunicações S.A. (“BrTel”) and TVSAT Telecomunicações S.A. (“TV SAT”), had aggregate tax contingencies related to value-added tax (“ICMS”) of approximately Ps. 55,455,306 (R$ 10,917,000). As of December 31, 2018, the Company has established a provision of Ps. 3,362,775 (R$ 662,000) in the accompanying consolidated financial statements for the losses arising from these contingencies which the Company considers probable. Such ICMS contingencies include the following tax assessments which the Company does not consider probable and therefore, has not established a provision in the accompanying consolidated financial statements: • Tax assessments against Star One, S.A. (currently Claro Brasil as surviving entity of merger) in the amount of Ps. 21,167,194 (R$ 4,167,000) based on allegations that the provision of satellite capacity is subject to ICMS. The Company is contesting these tax assessments in separate proceedings at different litigation stages and has obtained favorable judicial decisions in two proceedings. • Tax assessments against Claro Brasil and Americel in the amount of Ps. 5,861,997 (R$ 1,154,000), due to a decision that held certain benefits granted by the Brazilian states unconstitutional. • Tax assessment against Primesys in the amount of Ps. 3,916,464 (R$ 771,000), related to ICMS over certain activities not deemed to be part of data communication services. CSLL/IRPJ As of December 31, 2018 Claro Brasil, Americel, BrTel, and TV SAT had aggregate tax contingencies related to Social Contribution on Net income (“CSLL”) and Corporate Income Tax (“IRPJ”) in the amount of Ps. 17,779,021 (R$ 3,500,000). As of December 31, 2018, the Company has established a provision of Ps. 4,835,894 (R$ 952,000) in the accompanying consolidated financial statements for the losses arising from these contingencies, which the Company considers probable. The aforementioned CSLL/IRPJ contingencies include a tax assessment against Claro Brasil in the amount of Ps. 10,906,159 (R$ 2,147,000) alleging the undue amortization of goodwill amounts between 2009 and 2012, and charging CSLL, IRPJ and penalties due to the late payment of taxes. Claro Brasil has challenged this assessment at the administrative level and a final resolution is pending. The Company has established a provision of Ps. 558,769 (R$ 110,000) in the accompanying consolidated financial statements for the losses arising from these contingencies, which the Company considers probable. PIS/COFINS As of December 31, 2018, Claro Brasil, Americel, TdB, Primesys and Brasil Center Comunicações Ltda. (“Brasil Center”) had aggregate tax assessments related to Social Integration Program (“PIS”) and Contribution for Social Security Financing (“COFINS”) in the amount of Ps. 16,488,772 (R$ 3,246,000). As of December 31, 2018, the Company has established a provision of Ps. 5,861,997 (R$ 1,154,000) in the accompanying consolidated financial statements for the losses arising from the PIS/COFINS assessments, which the Company considers probable. With respect to such PIS/COFINS assessments: • Claro Brasil and Americel have commenced lawsuits against the Brazilian Federal Revenue Service seeking a ruling on constitutional grounds to exclude interconnection fees from the base used to calculate PIS and COFINS tax obligations. Pending a final resolution and pursuant to applicable Brazilian procedure, the companies have paid the tax based on their position in the lawsuits and have established a provision for the disputed amounts. As of December 31, 2018, the total amount in dispute was approximately Ps. 5,221,952 (R$ 1,028,000). • Tax assessments against Claro Brasil and Americel related to the offset of PIS and COFINS credits recorded in the noncumulative method in an amount of Ps. 8,183,429 (approximately R$ 1,611,000) as of December 31, 2018. The Company has not established a provision in the accompanying consolidated financial statements to cover the losses arising from this contingency, which the Company does not consider probable. As of September 30, 2018, based on a favorable decision from the Brazilian Supreme Court concerning the exclusion of ICMS from PIS and COFINS, the Company reverted the provision of Ps. 13,034,562 (R$2,566,000). FUST/FUNTTEL Anatel has initiated administrative proceedings against Claro Brasil, Americel, Primesys, TdB, BrTel and TVSAT in an aggregate amount of Ps. 14,223,217 (R$ 2,800,000) mainly based on an allegedly improper exclusion of interconnection revenues and costs from the basis used to calculate its Fund for Universal Telecommunication Services (“FUST”) obligations. The companies are contesting these assessments. As of December 31, 2018, the Company has established a provision of Ps. 1,706,786 (R$ 336,000) in the accompanying consolidated financial statements to cover the losses arising from these assessments, which the Company considers probable. In addition, the Brazilian Ministry of Communications ( Ministério das Comunicações ISS The Municipal Revenue Services have issued tax assessments against Claro Brasil, Brasil Center and Primesys, totaling an aggregate amount of approximately Ps. 3,637,080 (R$ 716,000) due to the alleged nonpayment of Brazilian Services tax (“ISS”) over several telecommunication services, including Pay TV services, considered as taxable for ISS by these authorities. The companies have challenged the tax assessments on the grounds that the services cited are not subject to ISS tax and a final resolution is pending. As of December 31, 2018, the Company has established a provision of Ps. 25,399 (R$ 5,000) in the accompanying financial statements for the losses arising from these assessments, which the Company considers probable. TFI As of December 31, 2018, Anatel fined Claro Brasil and Americel a total of Ps. 13,207,273 (R$ 2,600,000), for an unpaid installation inspection fee ( Taxa de Fiscalização de Instalação, Other Tax Contingencies There are other several tax contingencies involving Claro Brasil, Americel, TdB and Primesys in an aggregate amount of Ps. 12,394,517 (R$ 2,440,000) related to a variety of taxes and government programs. As of December 31, 2018, the Company has established a provision of Ps. 1,117,538 (R$ 220,000) in the accompanying consolidated financial statements for the losses arising from these contingencies, which the Company considers probable. b. Regulatory Matters Inflation-Related Adjustments Anatel has challenged the calculation of inflation-related adjustments due under the concession agreements with Tess S.A. (“Tess”), and Algar Telecom Leste S.A. (“ATL”), two of the Company’s subsidiaries that were previously merged into Claro Brasil. Anatel rejected Tess and ATL’s calculation of the inflation-related adjustments applicable to 60% of the concessions price (which was due in three equal annual installments, subject to inflation-related adjustments and interest), claiming that the companies’ calculation of the inflation-related adjustments resulted in a shortfall of the installment payments. The companies have filed declaratory and consignment actions seeking the resolution of the disputes and have obtained injunctions from a federal appeals court suspending payment until the pending appeals are resolved. The amount of the alleged shortfall as well as the method used to calculate monetary corrections are in dispute. If other methods or assumptions are applied, the amount may increase. In 2018, Anatel calculated the monetary correction in a total amount of Ps. 19,302,937 (R$ 3,800,000). As of December 31, 2018, the Company has established a provision of Ps. 3,419,668 (R$ 673,200) in the accompanying consolidated financial statements for the losses arising from these contingencies, which the Company considers probable. III. ECUADOR In 2014, following a regulatory claim filed in 2012 by state-owned operator Corporación Nacional de Telecomunicaciones Superintendencia de Control del Poder del Mercado, Tribunal de lo Contencioso Administrativo In 2018, the Administrative Dispute Tribunal ( Tribunal de lo Contencioso

Employee Benefits

Employee Benefits	12 Months Ended
	Dec. 31, 2018
Text block [abstract]
Employee Benefits	17. Employee Benefits 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 a) Defined benefit plan 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 Net employee DBO Plan Assets Effect of asset Net employee 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 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 Net employee 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 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 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 Ps. 306,490,306 Ps. (203,671,122 ) Ps. 5,087,543 Ps. 107,906,727 In the case of other subsidiaries in Mexico, the net period cost (income) of other employee benefits for the years ended December 31, 2016, 2017 and 2018 was Ps. 200,455, Ps. 165,884 and Ps. ( 16,347), respectively. The balance of employee benefits at December 31, 2017 and 2018 was Ps. 1,055,625 and Ps. 924,548, respectively. In the case of other subsidiaries in Brazil, the net period cost of other employee benefits for the years ended December 31, 2016, 2017 and 2018 was Ps. 65,101, Ps.93,742 and Ps. 98,658, respectively. The balance of employee benefits at December 31, 2017 and 2018 was Ps. 650,815 and Ps. 724,009, respectively. In the case of Ecuador, the net period cost of other employee benefits for the years ended December 31, 2016, 2017 and 2018 was Ps. 41,380, Ps.152,335 and Ps. 58,354, respectively. The balance of employee benefits at December 31, 2017 and 2018 was Ps. 403,194 and Ps. 448,608, respectively. 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% Included in the Telmex’s net pension plan liability are plan assets of Ps. 182,539,376 and Ps. 163,404,418 as of December 31, 2017 and 2018, respectively, of which 32.0% and 30.4% during 2017 and 2018, respectively, were invested in equity and debt instruments of both América Movil and also of related parties, primarily entities that are under common control of the Company’s principal shareholder. The Telmex pension plan recorded a re-measurement The assumptions used in determining the net period cost were as follows: 2016 2017 2018 Puerto Brazil Mexico Europe Puerto Brazil Mexico Europe Puerto 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 Biometric Puerto Rico: Mortality: RP 2014, MSS 2018 Tables. Disability: 1985 Pension Disability Table Brazil: Mortality: 2000 Basic AT Table for gender Disability for assets: UP 84 modified table for gender Disability retirement: 80 CSO Code Table Rotation: Probability of leaving the Company other than death, Disability and retirement is zero Europe Life expectancy in Austria is base on “AVÖ 2018-P 2008-P Telmex Mortality: Mexican 2000 (CNSF) adjusted Disability: Mexican Social Security adjusted by Telmex experience Turnover: Telmex experience Retirement: Telmex experience For the year ended December 31, 2018, the Company conducted a sensitivity analysis on the most significant variables that affect the DBO, simulating independently, reasonable changes to roughly 100 basis points in each of these variables. 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 Telmex Plans Part of the Telmex´s employees are covered under defined benefit pension plans and seniority premiums. Pension benefits and seniority premiums are determined on the basis of compensation received by the employees in their final year of employment, their seniority, and their age at the time of retirement. Telmex has set up an irrevocable trust fund to finance these employee benefits and has adopted the policy of making contributions to such fund when it is considered necessary. Defined benefits plan in Austria Telekom Austria Group provides defined benefits for certain former employees in Austria. All such employees are retired and were employed prior to January 1, 1975. This unfunded plan provides benefits based on a percentage of salary and years employed, not exceeding 80% of the salary before retirement, and taking into consideration the pension provided by the social security system. Telekom Austria Group is exposed to the risk of development of life expectancy and inflation because the benefits from pension plans are lifetime benefits. Furthermore, approximately 7% of the pension benefit obligations at December 31, 2018 relate to the employees of the company Akenes in Lausanne, acquired in 2017. Service awards in Austria Civil servants and certain employees (together ‘employees’) are eligible to receive service awards. Under these plans, eligible employees receive a cash bonus of two months’ salary after 25 years of service and four months’ salary after 40 years of service. Employees with at least 35 years of service when retiring (at the age of 65) or who are retiring based on specific legal regulations are eligible to receive four monthly salaries. The compensation is accrued as earned over the period of service, taking into account the employee turnover rate. The risk Telekom Austria Group is exposed to is mainly the risk of development of salary increases and changes of interest rates. Severance in Austria Employees starting to work for Telekom Austria Group in Austria on or after 1 January 2003 are covered by a defined contribution plan. Telekom Austria Group paid Ps. 46,084 and Ps. 53,755 (1.53% of the salary) into this defined contribution plan (BAWAG Allianz Mitarbeitervorsorgekasse AG) in 2017 and 2018 , respectively. Severance benefit obligations for employees hired before 1 January 2003, excluding civil servants, are covered by defined benefit plans. Upon termination by Telekom Austria Group or retirement, eligible employees receive severance payments equal to a multiple of their monthly compensation which comprises fixed compensation plus variable elements such as overtime or bonuses. Maximum severance is equal to a multiple of twelve times the eligible monthly compensation. In case of death, the heirs of eligible employees receive 50% of the severance benefits. Telekom Austria Group is exposed to the risk of development of salary increases and changes of interest rates. b) The defined contribution plans (DCP) Brazil Claro makes contributions to the DCP through Embratel Social Security Fund—Telos. Contributions are computed based on the salaries of the employees, who decide on the percentage of their contributions to the plan (participants enrolled before October 31st, 2014 is from 3% to 8% and, for those subscribed after that date, the contribution is from 1% to 7% of their salaries). Claro contributes the same percentage as the employee, capped at 8% of the participant’s balance for the employees that are eligible to participate in this plan. The unfunded liability represents Claro’s obligation for those participants that migrated from the DBP to the DCP. This liability is being paid over a term of 20 years as of January 1, 1999. Unpaid balances are adjusted monthly based on the yield of the asset portfolio at that date and is increased based on the General Price Index of Brazil plus 6 percentage points per year. At December 31, 2017 and 2018, the balance of the DCP liability was Ps. 136,402 and Ps. 92,238, respectively. For the years ended December 31, 2016, 2017 and 2018 the cost (income) of labor were Ps. (935), Ps. 374 and Ps. 2,377, respectively. Europe In Austria, pension benefits are generally provided by the social security system, for employees, and by the government, for civil servants. The contributions of 12.55% that A1 Telekom Austria Group made in 2017 and 2018 to the social security system and the government in Austria, amount to Ps. 1,309,157 and Ps.1,420,446, respectively. Contributions of the foreign subsidiaries into the respective systems range between 7% and 29% and amount to Ps. 453,641 and Ps. 518,607 in 2017 and 2018, respectively. Additionally, Telekom Austria Group sponsors a defined contribution plan for employees of some of its Austrian subsidiaries. Telekom Austria Group’s contributions to this plan are based on a percentage of the compensation not exceeding 5%. The annual expenses for this plan amounted to Ps. 258,891, Ps. 256,507 and Ps. 272,453 in 2016, 2017 and 2018, respectively. As of December 31, 2017 and 2018 the liability related to this defined contribution plan amounted to Ps. 120,892 and Ps. 116,244, respectively. Other countries For the rest of the countries where the Company operates and that do not have defined benefit plans or defined contribution plans, the Company makes contributions to the respective governmental social security agencies which are recognized in results of operations as they are incurred. Long- term direct employee benefits Balance at December 31, Applications Balance at December 31, Effect of Increase of 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, Applications Balance at December 31, Effect of Increase of 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 In 2008, a comprehensive restructuring program was initiated in the segment Austria. The provision for restructuring includes future compensation of employees who will no longer provide services for Telekom Austria Group but who cannot be laid off due to their status as civil servants. These employment contracts are onerous contracts under IAS 37, as the unavoidable cost related to the contractual obligation exceeds the future economic benefit. The restructuring program also includes social plans for employees whose employments will be terminated in a socially responsible way. In 2009 and every year from 2011 to 2018, new social plans were initiated which provide for early retirement, special severance packages and golden handshake options. Due to their nature as termination benefits, these social plans are accounted for according to IAS 19.

Financial Assets and Liabilitie

Financial Assets and Liabilities	12 Months Ended
	Dec. 31, 2018
Text block [abstract]
Financial Assets and Liabilities	18. Financial Assets and Liabilities Set out below is the categorization of the financial instruments, excluding cash and cash equivalents, held by the Company as of December 31, 2017 and 2018: December 31, 2017 Loans and Fair value Fair value Financial Assets: Equity investments at fair value through OCI and other short term investments Ps. 12,438,019 Ps. — Ps. 46,682,657 Accounts receivable from subscribers, distributors, contractual assets and other 163,085,537 — — Related parties 868,230 — — Derivative financial instruments — 8,037,384 — Total Ps. 176,391,786 Ps. 8,037,384 Ps. 46,682,657 Financial Liabilities: Debt Ps. 697,884,899 Ps. — Ps. — Accounts payable 212,673,407 — — Related parties 2,540,412 — — Derivative financial instruments — 14,359,460 — Total Ps. 913,098,718 Ps. 14,359,460 Ps. — December 31, 2018 Loans and Fair value Fair value Financial Assets: Equity investments at fair value through OCI and other short term investments Ps. 9,987,851 Ps. — Ps. 39,028,083 Accounts receivable from subscribers, distributors, contractual assets and other 185,202,494 — — Related parties 1,263,605 — — Derivative financial instruments — 5,287,548 — Total Ps. 196,453,950 Ps. 5,287,548 Ps. 39,028,083 Financial Liabilities: Debt Ps. 638,922,453 Ps. — Ps. — Accounts payable 221,957,267 — — Related parties 2,974,213 — — Derivative financial instruments — 17,107,579 — Total Ps. 863,853,933 Ps. 17,107,579 Ps. — Fair value hierarchy The Company’s valuation techniques used to determine and disclose the fair value of its financial instruments are based on the following hierarchy: Level 1: Quoted prices (unadjusted) in active markets for identical assets or liabilities; Level 2: Variables other than quoted prices in Level 1 that are observable for the asset or liability, either directly (prices) or indirectly (derived from prices); and Level 3: Variables used for the asset or liability that are not based on any observable market data (non-observable The fair value for the financial assets (excluding cash and cash equivalents) and financial liabilities shown in the consolidated statements of financial position at December 31, 2017 and 2018 is as follows: Measurement of fair value at December 31, 2017 Level 1 Level 2 Level 3 Total Assets: Equity investments at fair value through OCI and other short-term investments Ps. 46,682,657 Ps. 12,438,019 Ps. — Ps. 59,120,676 Derivative financial instruments — 8,037,384 — 8,037,384 Pension plan assets 218,518,358 9,039,270 130,976 227,688,604 Total Ps. 265,201,015 Ps. 29,514,673 Ps. 130,976 Ps. 294,846,664 Liabilities: Debt Ps. 691,769,785 Ps. 63,147,153 Ps. — Ps. 754,916,938 Derivative financial instruments — 14,359,460 — 14,359,460 Total Ps. 691,769,785 Ps. 77,506,613 Ps. — Ps. 769,276,398 Measurement of fair value at December 31, 2018 Level 1 Level 2 Level 3 Total Assets: Equity investments at fair value through OCI and other short-term investments Ps. 39,028,083 Ps. 9,987,851 Ps. — Ps. 49,015,934 Derivative financial instruments — 5,287,548 — 5,287,548 Pension plan assets 186,557,731 17,096,344 17,047 203,671,122 Total Ps. 225,585,814 Ps. 32,371,743 Ps. 17,047 Ps. 257,974,604 Liabilities: Debt Ps. 594,713,342 Ps. 99,723,251 Ps. — Ps. 694,436,593 Derivative financial instruments 17,107,579 — 17,107,579 Total Ps. 594,713,342 Ps. 116,830,830 Ps. — Ps. 711,544,172 Fair value of derivative financial instruments is valued using valuation techniques with market observable inputs. To determine its Level 2 fair value, the Company applies different valuation techniques including forward pricing and swaps models, using present value calculations. The models incorporate various inputs including credit quality of counterparties, foreign exchange spot and forward rates and interest rate curves. Fair value of debt Level 2 has been determined using a model based on present value calculation incorporating credit quality of AMX. The Company’s investment in equity investments at fair value, specifically the investment in KPN, is valued using the quoted prices (unadjusted) in active markets for identical assets. The net realized gain related to derivative financial instruments for the years ended December 31, 2017 and 2018 was Ps. 1,515,668 and Ps. 5,286,290, respectively. For the years ended December 31, 2016, 2017 and 2018, no transfers were made between Level 1 and Level 2 fair value measurement hierarchies. Changes in liabilities arising from financing activities At January 1, Cash flow Foreign currency At December 31, Total liabilities from financing activities Ps. 707,801,403 Ps. (27,433,489 ) Ps. 17,516,985 Ps. 697,884,899 At January 1, Cash flow Foreign currency At December 31, Total liabilities from financing activities Ps. 697,884,899 Ps. (34,050,923 ) Ps. (24,911,523 ) Ps. 638,922,453

Shareholders' Equity

Shareholders' Equity	12 Months Ended
	Dec. 31, 2018
Text block [abstract]
Shareholders' Equity	19. Shareholders’ Equity a) Pursuant to the Company’s bylaws, the capital stock of the Company consists of a minimum fixed portion of Ps. $270,049 (nominal amount), represented by a total of 71,063,212,170 shares (including treasury shares available for placement in accordance with the provisions of the Ley del Mercado de Valores), of which (i) 20,601,632,660 are “AA” shares (full voting rights); (ii) 558,677,704 are “A” shares (full voting rights); and (iii) 49,902,901,806 are “L” shares (limited voting rights). b) As of December 31, 2018 and 2017, the Company’s capital structure was represented by 66,034,792,526 (20,601,632,660 “AA” shares, 546,112,938 “A” shares and 44,887,046,928 “L” shares), and 66,069,035,539 (20,601,632,660 “AA” shares, 566,661,526 “A” shares and 44,900,741,353 “L” shares), respectively, not including treasury shares. c) As of December 31, 2018 and 2017, the Company’s treasury held for placement in accordance with the provisions of the Ley del Mercado de Valores and the Disposiciones de carácter general aplicables a las emisoras de valores y a otros participantes en el Mercado de valores issued by the Comisión Nacional Bancaria y de Valores, a total amount of 5,028,419,644 shares (5,028,399,396 “L” shares and 20,248 “A” shares); and 29,420,688,657 shares (29,419,120,359 “L” shares and 1,568,298 “A” shares), respectively, all acquired pursuant to the Company’s share repurchase program. d) The holders of “AA” and “A” shares are entitled to full voting rights. The holders of “L” shares may only vote in limited circumstances, and they are only entitled to appoint two members of the Board of Directors and their respective alternates. The matters in which “L” shares holders are entitled to vote are the following: extension of the Company´s corporate life, dissolution of the Company, change of Company’s corporate purpose, change of nationality of the Company, transformation of the Company, a merger with another company, any transaction representing 20% or more of the Company’s consolidated assets, as well as the cancellation of the inscription of the shares issued by the Company at the Registro Nacional de Valores and any other foreign stock exchanges where they may be registered, except for quotation systems or other markets not organized as stock exchanges. Within their respective series, all shares confer the same rights to their holders. The Company’s bylaws contain restrictions and limitations related to the subscription and acquisition of “AA” shares by non-Mexican e) Pursuant to the Company’s bylaws, “AA” shares must at all times represent no less than 20% and no more than 51% of the Company’s capital stock, and they shall also represent at all times, no less than 51% of the common shares (entitled to full voting rights, represented by “AA” and “A” shares) representing said capital stock. “A” shares, which may be freely subscribed, must not represent more than 19.6% of capital stock and must not exceed 49% of the common shares representing such capital. Common shares (entitled to full voting rights, represented by “AA” and “A” shares), must represent no more than 51% of the Company’s capital stock. Lastly, “L” shares which have limited voting rights and may be freely subscribed may not exceed, along with “A” shares, 80% of the Company’s capital stock. For purposes of determining these restrictions, the percentages mentioned above refer only to the number of the Company’s shares outstanding. Dividends On April 16, 2018, the Company’s shareholders approved, among other resolutions, the payment of a dividend of Ps. $0.32 (thirty-two On April 5, 2017, the Company’s shareholders approved, among other resolutions, the payment of a dividend of Ps. $0.30 (thirty peso cents) per share to each of the shares series of its capital stock “AA”, “A” and “L”, such dividend was payable, at each share holders’ election, in cash, “L” series shares or a combination thereof, in two installments of Ps. $0.15 (fifteen peso cents) each, on July 17 and November 13, 2017 respectively. As a result of the shareholders elections, on July 17, 2017 and November 13, 2017, AMX placed into circulation 325,264,125 and 16,905,414 series “L” shares, respectively. Legal Reserve According to the Ley General de Sociedades Mercantiles, companies must allocate from the net profit of each year, at least 5% to increase the legal reserve until it reaches 20% of its capital stock. This reserve may not be distributed to shareholders during the existence of the Company, except as a stock dividend. As of December 31, 2018 and 2017, the legal reserve amounted Ps. 358,440. Restrictions on Certain Transactions Pursuant to the Company’s bylaws any transfer of more than 10% of the full voting shares (“A” shares and “AA” shares), effected in one or more transactions by any person or group of persons acting in concert, requires prior approval by our Board of Directors. If the Board of Directors denies such approval, however, the Company bylaws require it to designate an alternate transferee, who must pay market price for the shares as quoted on the Bolsa Mexicana de Valores, S.A.B. de C.V. Payment of Dividends Dividends, either in cash or in kind, paid with respect to the “A” Shares, “L” Shares, “A” Share ADSs or “L” Share ADSs will generally be subject to a 10% Mexican withholding tax (provided that no Mexican withholding tax will apply to distributions of net taxable profits generated before 2015). Nonresident holders could be subject to a lower tax rate, to the extent that they are eligible for benefits under an income tax treaty to which Mexico is a party. Earnings per Share The following table shows the computation of the basic and diluted earnings per share: For the years ended December 31, 2016 2017 2018 Net profit for the period attributable Ps. 8,649,427 Ps. 29,325,921 Ps. 52,566,197 Weighted average shares (in millions) 65,693 65,909 66,055 Earnings per share attributable to 0.13 0.44 0.79 Subordinated Perpetual Fixed Rate Bond On January 3, 2018, the Company decided to call and redeem the Telekom Austria subordinated perpetual Fixed Rate Bond (hybrid bond) amounting to 600 million of Euros, according to the terms and conditions of the bond, at its nominal value plus all interest on February 1, 2018, the first call date. The Company paid an amount of Ps 13,440,120.

Components of other comprehensi

Components of other comprehensive (loss) income	12 Months Ended
	Dec. 31, 2018
Text block [abstract]
Components of other comprehensive (loss) income	20. Components of other comprehensive (loss) income The movement on the components of the other comprehensive (loss) income for the years ended December 31, 2016, 2017 and 2018 is as follows: For the years ended December 31, 2016 2017 2018 Controlling interest: Valuation of the derivative financial instruments, net of deferred taxes Ps. 48,496 Ps. 12,292 Ps. — Unrealized (loss) gain on equity investments at fair value, net of deferred taxes (6,673,731 ) 622,424 (3,765,688 ) Translation effect of foreign entities 104,178,880 (21,683,333 ) (61,223,458 ) Remeasurement of defined benefit plan, net of deferred taxes 14,771,770 (7,075,606 ) 652,722 Non-controlling 3,322,090 3,402,973 (2,986,018 ) Other comprehensive (loss) income Ps. 115,647,505 Ps. (24,721,250 ) Ps. (67,322,442 )

Valuation of derivatives, inter

Valuation of derivatives, interest cost from labor obligations and other financial items, net	12 Months Ended
	Dec. 31, 2018
Text block [abstract]
Valuation of derivatives, interest cost from labor obligations and other financial items, net	21. Valuation of derivatives, interest cost from labor obligations and other financial items, net For the years ended December 31, 2016, 2017 and 2018, valuation of derivatives and other financial items are as follows: For the years ended December 31, 2016 2017 2018 Controlling interest: (Loss) gain in valuation of derivatives, net Ps. (9,622,233 ) Ps. 8,192,567 Ps. (4,686,407 ) Capitalized interest expense (Note 10 d) 2,861,307 2,875,034 2,020,288 Commissions (2,034,972 ) (1,263,701 ) (1,901,473 ) Interest cost of labor obligations (Note 17) (9,178,513 ) (8,722,611 ) (9,968,526 ) Interest expense on taxes (245,922 ) (1,503,981 ) (555,921 ) Dividend received (Note 4) 5,740,092 2,385,559 2,605,333 Gain on net monetary positions (Note 2i, c) — — 4,429,145 Other financial cost (3,745,600 ) (3,906,627 ) (2,118,755 ) Total Ps. (16,225,841 ) Ps. (1,943,760 ) Ps. (10,176,316 )

Segments

Segments	12 Months Ended
	Dec. 31, 2018
Text block [abstract]
Segments	22. Segments América Móvil operates in different countries. As mentioned in Note 1, the Company has operations in Mexico, Guatemala, Nicaragua, Ecuador, El Salvador, Costa Rica, Brazil, Argentina, Colombia, United States, Honduras, Chile, Peru, Paraguay, Uruguay, Dominican Republic, Puerto Rico, Panama, Austria, Croatia, Bulgaria, Belarus, Macedonian, Serbia and Slovenia. The accounting policies for the segments are the same as those described in Note 2. The Chief Executive Officer, who is the Chief Operating Decision Maker (“CODM”), analyzes the financial and operating information by operating segment. All operating segments that (i) represent more than 10% of consolidated revenues, (ii) more than the absolute amount of its reported 10% of profits before income tax or (iii) more than 10% of consolidated assets, are presented separately. The Company presents the following reportable segments for the purposes of its consolidated financial statements: Mexico (includes Telcel and Corporate operations and assets), Telmex (Mexico), Brazil, Southern Cone (includes Argentina, Chile, Paraguay and Uruguay), Central America (includes Guatemala, El Salvador, Honduras, Nicaragua, Costa Rica and Panama), U.S.A. (excludes Puerto Rico), Caribbean (includes Dominican Republic and Puerto Rico), and Europe (includes Austria, Bulgaria, Croatia, Belarus, Slovenia, Macedonia and Serbia). The segment Southern Cone comprises mobile communication services in Argentina as well as Chile, Paraguay and Uruguay. In 2018, hyperinflation accounting in accordance with IAS 29 was initially applied to Argentina, which results in the restatement of non-monetary year-end The Company considers that the quantitative and qualitative aspects of any aggregated operating segments (that is, Central America and Caribbean reportable segments) are similar in nature for all periods presented. In evaluating the appropriateness of aggregating operating segments, the key indicators considered included but were not limited to: (i) the similarity of key financial statements measures and trends, (ii) all entities provide telecommunications services, (iii) similarities of customer base and services, (iv) the methods to distribute services are the same, based on telephone plant in both cases, wireless and fixed lines, (v) similarities of governments and regulatory entities that oversee the activities and services of telecom companies, (vi) inflation trends, and (vii) currency trends. Mexico Telmex Brazil Southern Cone Colombia Andean Central U.S.A. Caribbean Europe Eliminations Consolidated At December 31 2016 (in Ps.): External revenues 187,127,903 93,343,612 193,796,237 71,553,356 67,330,768 55,825,972 42,131,666 140,856,365 36,467,781 86,978,828 — 975,412,488 Intersegment revenues 16,438,858 8,872,248 3,560,388 776,719 257,767 304,834 289,465 — 30,210 — (30,530,489 ) — Total revenues 203,566,761 102,215,860 197,356,625 72,330,075 67,588,535 56,130,806 42,421,131 140,856,365 36,497,991 86,978,828 (30,530,489 ) 975,412,488 Depreciation and amortization 16,451,496 17,150,013 47,170,935 9,739,634 11,283,749 7,764,474 10,474,681 1,073,623 5,225,498 22,525,050 (333,232 ) 148,525,921 Operating income 48,219,505 12,275,892 6,325,323 8,317,053 11,209,959 6,086,638 3,830,974 1,220,601 6,143,183 5,388,595 592,587 109,610,310 Interest income 28,659,372 303,915 3,747,684 2,649,539 104,304 944,945 462,779 239,797 691,132 286,784 (33,897,656 ) 4,192,595 Interest expense 32,004,944 1,135,552 22,970,335 5,049,457 1,079,989 1,147,380 411,597 — 143,322 2,953,033 (33,033,597 ) 33,862,012 Income tax 2,502,242 921,803 (4,294,040 ) 2,021,090 4,456,750 1,768,066 3,291,776 767,295 2,542,080 (2,578,206 ) — 11,398,856 Equity interest in net income 67,472 116,368 (270 ) (23,319 ) — — 171 — — 29,528 — 189,950 Net profit (loss) attributable to equity holders of the parent 378,150 902,282 (10,357,493 ) 3,765,015 4,022,633 3,621,863 538,890 987,790 3,318,960 7,065,769 (5,594,432 ) 8,649,427 Assets by segment 1,070,598,204 161,133,722 461,831,754 140,617,162 103,361,235 113,839,981 80,832,029 42,812,349 93,941,695 227,288,156 (981,214,013 ) 1,515,042,274 Plant, property and equipment, net 64,893,242 112,220,236 203,270,555 67,023,143 59,690,886 37,716,772 41,808,573 1,949,166 33,854,428 78,763,065 — 701,190,066 Goodwill 27,186,328 213,926 26,106,622 3,006,448 14,659,891 5,948,335 5,652,268 3,464,217 14,186,723 52,207,877 — 152,632,635 Trademarks, net 615,318 307,881 366,727 — 194 — — 788,228 284,665 10,203,880 — 12,566,893 Licenses and rights, net 5,887,092 42,867 41,496,209 8,760,860 4,603,793 12,882,210 3,993,120 — 7,694,798 30,670,315 — 116,031,264 Investment in associated companies 7,605,220 2,218,824 699 81,284 470 — 17,390 — — 1,072,778 (7,393,181 ) 3,603,484 Liabilities by segments 798,044,609 117,663,161 349,915,118 124,149,687 40,811,337 52,949,608 38,095,161 41,369,767 44,790,656 121,928,202 (485,698,799 ) 1,244,018,507 At December 31, 2017 (in Ps.): External revenues 190,022,612 89,731,238 210,536,673 81,092,885 72,435,460 56,393,595 44,094,835 148,589,487 35,092,578 93,644,172 — 1,021,633,535 Intersegment revenues 16,748,428 8,753,525 4,785,601 1,250,983 304,555 177,856 187,086 44 122,656 — (32,330,734 ) — Total revenues 206,771,040 98,484,763 215,322,274 82,343,868 72,740,015 56,571,451 44,281,921 148,589,531 35,215,234 93,644,172 (32,330,734 ) 1,021,633,535 Depreciation and amortization 17,030,251 18,902,238 51,486,652 10,639,591 12,373,790 8,328,705 9,668,439 1,594,727 5,349,757 25,222,962 (422,170 ) 160,174,942 Operating income (loss) 50,666,028 7,921,524 11,601,369 11,676,427 (4,704,165 ) 5,650,477 5,252,401 2,915,123 4,752,168 4,523,857 (111,906 ) 100,143,303 Interest income 30,083,437 619,748 3,792,242 2,884,613 211,521 1,793,974 1,064,992 394,196 1,111,980 307,021 (39,338,076 ) 2,925,648 Interest expense 32,185,868 1,028,593 23,578,083 4,637,989 1,955,688 1,573,929 485,684 — 377,727 2,035,716 (37,558,496 ) 30,300,781 Income tax 18,142,482 387,145 (2,991,377 ) 3,535,302 (1,874,594 ) 1,806,085 2,025,618 1,803,555 3,529,253 (1,417,358 ) (4,600 ) 24,941,511 Equity interest in net income (loss) of associated companies 99,044 16,564 (232 ) (9,801 ) — — — — — (14,190 ) — 91,385 Net profit (loss) attributable to equity holders of the parent 26,321,442 184,387 (6,617,381 ) 4,421,938 (6,209,530 ) 1,595,382 3,713,301 1,793,875 1,262,073 5,656,132 (2,795,698 ) 29,325,921 Assets by segment 1,033,036,406 170,402,561 428,281,963 133,136,177 108,362,023 113,478,626 81,529,691 40,761,830 88,672,466 203,858,243 (915,308,134 ) 1,486,211,852 Plant, property and equipment, net 59,137,555 109,713,770 187,459,628 69,006,093 57,060,931 35,930,966 39,050,481 1,693,642 32,173,524 85,116,608 — 676,343,198 Goodwill 27,102,384 213,926 24,708,739 3,073,444 13,981,033 6,113,495 5,597,990 3,341,956 14,186,723 53,143,542 — 151,463,232 Trademarks, net 406,723 274,786 246,557 — — — — 631,024 262,641 8,116,076 — 9,937,807 Licenses and rights, net 11,457,720 13,175 35,662,305 8,885,086 4,197,498 11,295,202 3,376,106 — 7,276,039 31,141,255 — 113,304,386 Investment in associated companies 469,662 546,872 640 63,110 451 — 16,999 — — 806,950 1,830,488 3,735,172 Liabilities by segments 794,598,013 133,428,178 322,620,030 119,123,646 54,756,152 48,656,628 35,501,900 38,249,957 43,978,410 119,240,533 (484,575,112 ) 1,225,578,335 At December 31, 2018 (in Ps.): External revenues 207,610,244 86,339,289 188,712,666 89,149,978 75,460,428 55,633,192 44,883,585 153,266,315 36,435,541 100,716,443 — 1,038,207,681 Intersegment revenues 16,946,543 9,741,908 4,593,760 13,200,358 344,517 154,082 149,445 — 204,294 — (45,334,907 ) — Total revenues 224,556,787 96,081,197 193,306,426 102,350,336 75,804,945 55,787,274 45,033,030 153,266,315 36,639,835 100,716,443 (45,334,907 ) 1,038,207,681 Depreciation and amortization 17,619,342 18,358,248 42,857,751 13,526,361 13,464,867 8,516,960 8,940,655 1,545,395 5,036,831 26,838,972 (992,802 ) 155,712,580 Operating income (loss) 57,450,599 8,085,764 23,494,903 16,975,797 14,388,552 5,003,915 4,867,763 2,665,270 5,811,846 4,731,562 (3,918,800 ) 139,557,171 Interest income 26,578,280 420,380 11,303,888 2,251,474 1,013,839 1,666,879 1,566,086 559,548 1,458,874 122,133 (36,295,212 ) 10,646,169 Interest expense 32,526,258 1,153,913 20,377,191 4,338,941 2,913,881 1,719,663 509,081 — 561,867 1,973,431 (34,302,793 ) 31,771,433 Income tax 28,842,505 643,377 4,026,444 1,390,039 2,251,877 2,498,666 2,533,600 810,898 2,774,204 707,093 (1,624 ) 46,477,079 Equity interest in net income (loss) of associated companies (5,962 ) 44,965 (152 ) (20,871 ) — — — — — (17,713 ) — 267 Net profit (loss) attributable to equity holders of the parent 23,185,029 (2,201,572 ) 3,530,653 6,065,703 9,165,801 1,730,933 2,821,733 2,820,505 3,644,697 3,809,694 (2,006,979 ) 52,566,197 Assets by segment 970,564,314 174,461,398 390,791,480 127,946,573 111,975,598 96,347,779 81,640,157 38,814,907 102,531,547 186,135,358 (851,985,719 ) 1,429,223,392 Plant, property and equipment, net 56,056,634 103,737,293 173,197,708 62,988,635 51,422,548 35,800,477 37,146,601 1,356,237 38,011,242 80,421,642 (138,297 ) 640,000,720 Goodwill 27,104,632 215,381 21,388,124 2,796,759 12,770,380 5,242,365 5,466,871 3,328,533 14,186,723 53,066,729 — 145,566,497 Trademarks, net 227,774 243,556 124,910 — — — — 507,033 249,984 3,313,948 — 4,667,205 Licenses and rights, net 10,573,147 — 25,873,910 12,555,496 3,400,235 9,651,582 3,605,416 — 10,294,336 27,344,273 — 103,298,395 Investment in associated companies 5,621,661 563,667 543 20,697 412 — 24,262 — — 748,674 (3,847,209 ) 3,132,707 Liabilities by segments 748,965,728 136,993,838 298,308,084 94,550,901 56,211,438 50,064,761 28,592,953 35,552,678 58,716,154 117,214,746 (441,820,311 ) 1,183,350,970

Recently Issued Accounting Stan

Recently Issued Accounting Standards	12 Months Ended
	Dec. 31, 2018
Text block [abstract]
Recently Issued Accounting Standards	23. Recently Issued Accounting Standards New standards, amendments and interpretations not yet effective The estimated impact and evaluation of the recently issued accounting standards not yet in effect as of December 31, 2018 are as follow: IFRS 16, Leases In January 2016, the IASB issued the new accounting standard, IFRS 16 Leases. The fundamental changes in this new standard affect the lessees’ recognition of leases in the financial statements. Generally, all leases have to be recognized based on the “right of use approach”. IFRS 16 replaces IAS 17 Leases, IFRIC 4 Determining whether an Arrangement contains a Lease, SIC-15 SIC-27 on-balance ’low-value’ right-of-use right-of-use Lessees will be also required to remeasure the lease liability upon the occurrence of certain events (e.g., a change in the lease term, a change in future lease payments resulting from a change in an index or rate used to determine those payments). The lessee will generally recognize the amount of the remeasurement of the lease liability as an adjustment to the right-of-use Lessor accounting under IFRS 16 is substantially unchanged from today’s accounting under IAS 17. Lessors will continue to classify all leases using the same classification principle as in IAS 17 and distinguish between two types of leases: operating and finance leases. IFRS 16, which is effective for annual periods beginning on January 1, 2019, requires lessees and lessors to make more extensive disclosures than under IAS 17. Transition to IFRS 16 The Company will adopt the IFRS 16 using the modified retrospectively method with the date of initial applications on January 1, 2019. Moreover, the Company will apply the new requirements regarding IFRS 16 to all contracts identified as leases under the current accounting standard and reassessed all services, in order to identify lease components or an implicit accounting lease within these contracts. The Company will elect to use the exemptions applicable to the standard on lease contracts for which the lease terms ends within 12 months as of the date of initial application, and lease contracts for which the underlying asset is of low value. The Company has leases of certain office equipment (i.e., personal computers, printing and photocopying machines, mainly) that are considered low value assets. The Company identified a significant number of lease assets such as towers, physical facilities (office buildings, stores and sites, mainly), circuits, among others. The implementation of IFRS 16 required a significant effort due to the fact of the need to make certain estimates, such as the leases term, based on the non-cancelable non-cancelable AMX expects that the changes in the implementation of IFRS 16 will have a significant impact on its financial statements from the date of adoption. The Company expects that the opening balances at the date of initial application will increase in right of use assets and lease liabilities between Ps.113,000,000 and Ps.132,000,000 without a material impact in equity. Estimated initial impact are based on the assessment conducted to date and could have a difference because of the lease borrowing rate and the volume of contracts considered in the implementation process. The new accounting policies will not be final until the Company presents its first financial statements subsequent to the effective date of IFRS 16. IFRS 17 Insurance Contracts In May 2017, the IASB issued IFRS 17 Insurance Contracts Insurance Contracts non-life, re-insurance), • A specific adaptation for contracts with direct participation features (the variable fee approach) • A simplified approach (the premium allocation approach) mainly for short-duration contracts IFRS 17 is effective for reporting periods beginning on or after 1 January 2021, with comparative figures required. Early application is permitted, provided the entity also applies IFRS 9 and IFRS 15 on or before the date it first applies IFRS 17. The company is evaluating the effects, however, it does not expect the adoption of this standard to have a significant impact. IFRIC Interpretation 23 Uncertainty over Income Tax Treatment The Interpretation addresses the accounting for income taxes when tax treatments involve uncertainty that affects the application of IAS 12 and does not apply to taxes or levies outside the scope of IAS 12, nor does it specifically include requirements relating to interest and penalties associated with uncertain tax treatments. The Interpretation specifically addresses the following: • Whether an entity considers uncertain tax treatments separately • The assumptions an entity makes about the examination of tax treatments by taxation authorities • How an entity determines taxable profit (tax loss), tax bases, unused tax losses, unused tax credits and tax rates • How an entity considers changes in facts and circumstances An entity has to determine whether to consider each uncertain tax treatment separately or together with one or more other uncertain tax treatments. The approach that better predicts the resolution of the uncertainty should be followed. The interpretation is effective for annual reporting periods beginning on or after 1 January 2019, but certain transition reliefs are available. The Company will apply the interpretation from its effective date. The Company will establish the processes and procedures to obtain the necessary information to apply the Interpretation in a timely manner. The company estimates that the adoption of this standard will not have a significant impact on its consolidated financial statements. Amendments to IFRS 9: Prepayment Features with Negative Compensation Under IFRS 9, a debt instrument can be measured at amortized cost or at fair value through other comprehensive income, provided that the contractual cash flows are ‘solely payments of principal and interest on the principal amount outstanding’ (the SPPI criterion) and the instrument is held within the appropriate business model for that classification. The amendments to IFRS 9 clarify that a financial asset passes the SPPI criterion regardless of the event or circumstance that causes the early termination of the contract and irrespective of which party pays or receives reasonable compensation for the early termination of the contract. The amendments should be applied retrospectively and are effective from 1 January 2019, with earlier application permitted. These amendments have no impact on the consolidated financial statements of the Company. Amendments to IFRS 10 and IAS 28: Sale or Contribution of Assets between an Investor and its Associate or Joint Venture The amendments address the conflict between IFRS 10 and IAS 28 in dealing with the loss of control of a subsidiary that is sold or contributed to an associate or joint venture. The amendments clarify that the gain or loss resulting from the sale or contribution of assets that constitute a business, as defined in IFRS 3, between an investor and its associate or joint venture, is recognized in full. Any gain or loss resulting from the sale or contribution of assets that do not constitute a business, however, is recognized only to the extent of unrelated investors’ interests in the associate or joint venture. The IASB has deferred the effective date of these amendments indefinitely, but an entity that early adopts the amendments must apply them prospectively. The Company will apply these amendments when they become effective. Amendments to IAS 19: Plan Amendment, Curtailment or Settlement The amendments to IAS 19 address the accounting when a plan amendment, curtailment or settlement occurs during a reporting period. The amendments specify that when a plan amendment, curtailment or settlement occurs during the annual reporting period, an entity is required to: • Determine current service cost for the remainder of the period after the plan amendment, curtailment or settlement, using the actuarial assumptions used to remeasure the net defined benefit liability (asset) reflecting the benefits offered under the plan and the plan assets after that event. • Determine net interest for the remainder of the period after the plan amendment, curtailment or settlement using: the net defined benefit liability (asset) reflecting the benefits offered under the plan and the plan assets after that event; and the discount rate used to remeasure that net defined benefit liability (asset). The amendments also clarify that an entity first determines any past service cost, or a gain or loss on settlement, without considering the effect of the asset ceiling. This amount is recognized in profit or loss. An entity then determines the effect of the asset ceiling after the plan amendment, curtailment or settlement. Any change in that effect, excluding amounts included in the net interest, is recognized in other comprehensive income. The amendments apply to plan amendments, curtailments, or settlements occurring on or after the beginning of the first annual reporting period that begins on or after 1 January 2019, with early application permitted. These amendments will apply only to any future plan amendments, curtailments, or settlements of the Company. Amendments to IAS 28: Long-term interests in associates and joint ventures The amendments clarify that an entity applies IFRS 9 to long-term interests in an associate or joint venture to which the equity method is not applied but that, in substance, form part of the net investment in the associate or joint venture (long-term interests). This clarification is relevant because it implies that the expected credit loss model in IFRS 9 applies to such long-term interests. The amendments also clarified that, in applying IFRS 9, an entity does not take account of any losses of the associate or joint venture, or any impairment losses on the net investment, recognized as adjustments to the net investment in the associate or joint venture that arise from applying IAS 28 Investments in Associates and Joint Ventures. The amendments should be applied retrospectively and are effective from 1 January 2019, with early application permitted. Since the Company does not have such long-term interests in its associate and joint venture, the amendments will not have an impact on its consolidated financial statements. Annual Improvements 2015-2017 Cycle (issued in December 2017) These improvements include: • IFRS 3 Business Combinations The amendments clarify that, when an entity obtains control of a business that is a joint operation, it applies the requirements for a business combination achieved in stages, including remeasuring previously held interests in the assets and liabilities of the joint operation at fair value. In doing so, the acquirer remeasures its entire previously held interest in the joint operation. An entity applies those amendments to business combinations for which the acquisition date is on or after the beginning of the first annual reporting period beginning on or after 1 January 2019, with early application permitted. These amendments will apply on future business combinations of the Company. • IFRS 11 Joint Arrangements A party that participates in, but does not have joint control of, a joint operation might obtain joint control of the joint operation in which the activity of the joint operation constitutes a business as defined in IFRS 3. The amendments clarify that the previously held interests in that joint operation are not remeasured. An entity applies those amendments to transactions in which it obtains joint control on or after the beginning of the first annual reporting period beginning on or after 1 January 2019, with early application permitted. These amendments are currently not applicable to the Company but may apply to future transactions. • IAS 12 Income Taxes The amendments clarify that the income tax consequences of dividends are linked more directly to past transactions or events that generated distributable profits than to distributions to owners. Therefore, an entity recognizes the income tax consequences of dividends in profit or loss, other comprehensive income or equity according to where the entity originally recognized those past transactions or events. An entity applies those amendments for annual reporting periods beginning on or after 1 January 2019, with early application is permitted. When an entity first applies those amendments, it applies them to the income tax consequences of dividends recognized on or after the beginning of the earliest comparative period. Since the Company´s current practice is in line with these amendments, the Company does not expect any effect on its consolidated financial statements. • IAS 23 Borrowing Costs The amendments clarify that an entity treats as part of general borrowings any borrowing originally made to develop a qualifying asset when substantially all of the activities necessary to prepare that asset for its intended use or sale are complete. An entity applies those amendments to borrowing costs incurred on or after the beginning of the annual reporting period in which the entity first applies those amendments. An entity applies those amendments for annual reporting periods beginning on or after 1 January 2019, with early application permitted. Since the Company´s current practice is in line with these amendments, the Company does not expect any effect on its consolidated financial statements.

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2018
Text block [abstract]
Subsequent Events	24. Subsequent Events (a) On January 24, 2019, the Company acquired from Telefónica S.A. and certain of its affiliates (“Telefónica”), 100% of Telefónica Móviles Guatemala, S.A. (“Telefónica Guatemala”), and has entered into an agreement to acquire 99.3% of Telefónica Móviles El Salvador, S.A. de C.V. (“Telefónica El Salvador”). The Telefónica Guatemala acquisition has been completed on this date. The completion of the acquisition of Telefónica El Salvador is subject to certain customary closing conditions, including regulatory approval. The purchase price paid for Telefónica Guatemala was Ps. 6,326,068 (US$333,000 ). The agreed upon purchase price for Telefónica El Salvador is Ps. 5,984,118 (US$315,000). The acquired companies provide mobile and fixed telecommunications services, including voice, data and Pay TV in El Salvador and Guatemala. (b) On March 18, 2019, the Company announced that it has entered into an agreement to acquire from NII Holdings, Inc. and certain of its affiliates (“NII”) and AI Brazil Holdings B.V. 100% of Nextel Telecomunicações Ltda. (“Nextel Brazil”). The completion of the acquisition is subject to certain customary closing conditions, including regulatory approval from Agência Nacional de Telecomunicações — Anatel and Conselho Administrativo de Defesa Econômica — CADE. The transaction is also subject to the approval at a stockholders meeting of NII shareholders holding a majority of the outstanding shares of NII. The agreed purchase price for Nextel Brazil is Ps. 17,487,578 (US$905,000) on a cash free / debt free basis. Nextel Brazil provides nationwide mobile telecommunications services.

Supplemental Guarantor Informat

Supplemental Guarantor Information	12 Months Ended
	Dec. 31, 2018
Text block [abstract]
Supplemental Guarantor Information	25. Supplemental Guarantor Information Condensed Consolidating Financial Information The following consolidating information presents condensed consolidating statements of financial position as of December 31, 2017 and 2018 and condensed consolidating statements of comprehensive income and cash flows for each of the three years in the period ended December 31, 2018 of the Company and Telcel (the “wholly-owned Guarantor Subsidiary”). The unconsolidated financial statements of América Móvil and Telcel reflect their investments in subsidiaries on the basis of the equity method. These unconsolidated entities are the Guarantors of most of América Móvil’s consolidated obligations. The guarantees of the Guarantor are full and unconditional. The Company’s consolidating condensed financial information for the (i) Company; (ii) its wholly-owned guarantor subsidiary Telcel (on standalone basis), which is a wholly and unconditional guarantor under the Senior Notes; (iii) the combined non-guarantor Condensed consolidating statements of financial position As of December 31, 2017 Parent Wholly-owned Subsidiary Combined non-guarantor Eliminations Consolidated Assets: Cash and cash equivalents Ps. 7,018,559 Ps. 3,553,352 Ps. 13,698,562 Ps. — Ps. 24,270,473 Equity investments at fair value through OCI and other short-term investments 10,303,535 — 48,817,141 — 59,120,676 Accounts receivable and derivative financial instruments 9,874,652 24,064,936 167,873,940 — 201,813,528 Related parties 208,240,067 957,704 503,895,549 (712,225,090 ) 868,230 Inventories, net 264,649 16,700,837 21,844,079 — 38,809,565 Other current assets 17,805,747 922,245 (1,375,246 ) — 17,352,746 Property, plant and equipment, Net 1,996,721 24,287,904 650,058,573 — 676,343,198 Investments in associated companies 747,771,790 35,569,788 3,457,152 (783,063,558 ) 3,735,172 Intangible assets and other non- current assets, net 4,104,268 73,557,904 386,236,092 — 463,898,264 Total assets Ps. 1,007,379,988 Ps. 179,614,670 Ps. 1,794,505,842 Ps. (1,495,288,648 ) Ps. 1,486,211,852 Liabilities: Short-term debt and current portion of long-term debt Ps. 34,345,398 Ps. — Ps. 17,400,443 Ps. — Ps. 51,745,841 Current liabilities 161,940,198 41,304,845 797,880,314 (639,534,701 ) 361,590,656 Long-term debt 547,728,176 — 98,410,882 — 646,139,058 Other non-current 69,201,904 132,728,838 40,909,234 (76,737,196 ) 166,102,780 Total liabilities Ps. 813,215,676 Ps. 174,033,683 Ps. 954,600,873 Ps. (716,271,897 ) Ps. 1,225,578,335 Equity attributable to equity holders of the parent 194,164,312 5,580,987 741,988,231 (747,569,218 ) 194,164,312 Non-controlling — — 97,916,738 (31,447,533 ) 66,469,205 Total equity 194,164,312 5,580,987 839,904,969 (779,016,751 ) 260,633,517 Total liabilities and equity Ps. 1,007,379,988 Ps. 179,614,670 Ps. 1,794,505,842 Ps. (1,495,288,648 ) Ps. 1,486,211,852 Condensed consolidating statements of financial position As of December 31, 2018 Parent Wholly-owned Combined non-guarantor Eliminations Consolidated Assets: Cash and cash equivalents Ps. 8,335,101 Ps. 1,745,895 Ps. 11,578,966 Ps. — Ps. 21,659,962 Equity investments at fair value through OCI and other short-term investments 9,511,368 — 39,504,566 — 49,015,934 Accounts receivable and derivative financial instruments 31,462,176 35,671,582 154,380,710 — 221,514,468 Related parties 199,566,671 1,144,534 560,142,367 (759,589,967 ) 1,263,605 Inventories, net 215,055 18,495,502 21,594,805 — 40,305,362 Other current assets — 1,218,764 14,077,429 — 15,296,193 Property, plant and equipment, Net 1,340,358 23,192,546 615,467,816 — 640,000,720 Investments in associated companies 734,944,344 88,070,845 16,926,615 (836,809,097 ) 3,132,707 Intangible assets and other non- current assets, net 4,113,902 26,176,381 406,744,158 — 437,034,441 Total assets Ps. 989,488,975 Ps. 195,716,049 Ps. 1,840,417,432 Ps. (1,596,399,064 ) Ps. 1,429,223,392 Liabilities: Short-term debt and current portion of long-term debt Ps. 52,827,411 Ps. — Ps. 43,403,223 Ps. — Ps. 96,230,634 Current liabilities 153,489,868 72,282,238 597,174,025 (452,085,876 ) 370,860,255 Long-term debt 456,918,590 — 85,773,229 — 542,691,819 Other non-current 130,257,461 109,368,210 242,232,897 (308,290,306 ) 173,568,262 Total liabilities Ps. 793,493,330 Ps. 181,650,448 Ps. 968,583,374 Ps. (760,376,182 ) Ps. 1,183,350,970 Equity attributable to equity holders of the parent 195,995,645 14,065,601 760,485,332 (774,550,933 ) 195,995,645 Non-controlling — — 111,348,726 (61,471,949 ) 49,876,777 Total equity 195,995,645 14,065,601 871,834,058 (836,022,882 ) 245,872,422 Total liabilities and equity Ps. 989,488,975 Ps. 195,716,049 Ps. 1,840,417,432 Ps. (1,596,399,064 ) Ps. 1,429,223,392 Condensed consolidating statements of comprehensive income For the year ended December 31, 2016 Parent Wholly-owned Combined non-guarantor Eliminations Consolidated Total revenues Ps. 137,236,301 Ps. 173,714,225 Ps. 857,137,822 Ps. (192,675,860 ) Ps. 975,412,488 Total cost and operating expenses 117,835,634 160,949,691 778,483,079 (191,466,226 ) 865,802,178 Operating income 19,400,667 12,764,534 78,654,743 (1,209,634 ) 109,610,310 Interest (expense) income, net (12,331,095 ) 97,314 (17,207,855 ) (227,781 ) (29,669,417 ) Foreign currency exchange (loss) gain, net (46,625,392 ) (5,853,669 ) 12,051,654 — (40,427,407 ) Other financing cost, net (10,475,673 ) (11,203,533 ) 5,453,365 — (16,225,841 ) Income tax (7,712,179 ) 1,139,631 17,971,404 — 11,398,856 Equity interest in net income of associated companies 50,968,741 (1,342,073 ) (6,677,059 ) (42,759,659 ) 189,950 Net profit (loss) for year Ps. 8,649,427 Ps. (6,677,058 ) Ps. 54,303,444 Ps. (44,197,074 ) Ps. 12,078,739 Distribution of the net profit (loss) to: Equity owners of holding company 8,649,427 (6,677,058 ) 50,049,280 (43,372,222 ) 8,649,427 Non-controlling — — 4,254,164 (824,852 ) 3,429,312 Net profit (loss) Ps. 8,649,427 Ps. (6,677,058 ) Ps. 54,303,444 Ps. (44,197,074 ) Ps. 12,078,739 Other comprehensive income items: Net other comprehensive income (loss) to be reclassified to profit or loss in subsequent years: Effect of translation of foreign entities 104,178,880 755,978 108,291,984 (105,728,134 ) 107,498,708 Effect of fair value of derivatives, net of deferred taxes 48,496 — 30,206 (29,573 ) 49,129 Items not to be reclassified to profit or loss in subsequent years: Remeasurement of defined benefit plan, net of income tax effect 14,771,770 (12,300 ) 7,477,926 (7,463,997 ) 14,773,399 Equity investments at fair value (6,673,731 ) — (6,673,731 ) 6,673,731 (6,673,731 ) Total other comprehensive income items for the period Ps. 112,325,415 Ps. 743,678 Ps. 109,126,385 Ps. (106,547,973 ) Ps. 115,647,505 Total comprehensive income for the period Ps. 120,974,842 Ps. (5,933,380 ) Ps. 163,429,829 Ps. (150,745,047 ) Ps. 127,726,244 Comprehensive income for the period attributable to: Equity holders of the parent Ps. 120,974,842 Ps. (5,933,380 ) Ps. 150,900,984 Ps. (144,967,604 ) Ps. 120,974,842 Non-controlling — — 12,528,845 (5,777,443 ) 6,751,402 Ps. 120,974,842 Ps. (5,933,380 ) Ps. 163,429,829 Ps. (150,745,047 ) Ps. 127,726,244 Condensed consolidating statements of comprehensive income For the year ended December 31, 2017 Parent Wholly-owned Combined non-guarantor Eliminations Consolidated Total revenues Ps. 160,057,511 Ps. 170,991,493 Ps. 887,951,615 Ps. (197,367,084 ) Ps. 1,021,633,535 Total cost and operating expenses 123,548,341 163,152,868 832,429,198 (197,640,175 ) 921,490,232 Operating income 36,509,170 7,838,625 55,522,417 273,091 100,143,303 Interest (expense) income, net (16,779,235 ) (12,365,116 ) 1,810,523 (41,305 ) (27,375,133 ) Foreign currency exchange (loss) gain, net (15,223,111 ) 1,320,667 83,493 — (13,818,951 ) Other financing cost, net 6,775,455 — (8,719,215 ) — (1,943,760 ) Income tax 14,201,399 1,386,519 9,353,593 — 24,941,511 Equity interest in net income of associated companies 32,245,041 (8,977,146 ) (13,466,845 ) (9,709,665 ) 91,385 Net profit (loss) for year Ps. 29,325,921 Ps. (13,569,489 ) Ps. 25,876,780 Ps. (9,477,879 ) Ps. 32,155,333 Distribution of the net profit (loss) to: Equity owners of holding company 29,325,921 (13,569,489 ) 21,417,549 (7,848,060 ) 29,325,921 Non-controlling — — 4,459,231 (1,629,819 ) 2,829,412 Net profit (loss) Ps. 29,325,921 Ps. (13,569,489 ) Ps. 25,876,780 Ps. (9,477,879 ) Ps. 32,155,333 Other comprehensive income items: Net other comprehensive income (loss) to be reclassified to profit or loss in subsequent years: Effect of translation of foreign entities (21,683,333 ) (1,897,936 ) (18,309,877 ) 23,581,269 (18,309,877 ) Effect of fair value of derivatives, net of deferred taxes 12,292 — 12,292 (12,292 ) 12,292 Items not to be reclassified to profit or loss in subsequent years: Remeasurement of defined benefit plan, net of income tax effect (7,075,606 ) (8,439 ) (7,046,089 ) 7,084,045 (7,046,089 ) Equity investments at fair value 622,424 — 622,424 (622,424 ) 622,424 Total other comprehensive income items for the period Ps. (28,124,223 ) Ps. (1,906,375 ) Ps. (24,721,250 ) Ps. 30,030,598 Ps. (24,721,250 ) Total comprehensive income for the period Ps. 1,201,698 Ps. (15,475,864 ) Ps. 1,155,530 Ps. 20,552,719 Ps. 7,434,083 Comprehensive income for the period attributable to: Equity holders of the parent Ps. 1,201,698 Ps. (15,475,864 ) Ps. (5,076,855 ) Ps. 20,552,719 Ps. 1,201,698 Non-controlling — — 6,232,385 — 6,232,385 Ps. 1,201,698 Ps. (15,475,864 ) Ps. 1,155,530 Ps. 20,552,719 Ps. 7,434,083 Condensed consolidating statements of comprehensive income For the year ended December 31, 2018 Parent Wholly-owned Combined non-guarantor Eliminations Consolidated Total revenues Ps. 170,887,145 Ps. 190,924,413 Ps. 890,427,121 Ps. (214,030,998 ) Ps. 1,038,207,681 Total cost and operating expenses 129,039,749 183,542,058 799,085,884 (213,017,181 ) 898,650,510 Operating income 41,847,396 7,382,355 91,341,237 (1,013,817 ) 139,557,171 Interest (expense) income, net (24,831,538 ) (11,033,069 ) 14,757,906 (18,563 ) (21,125,264 ) Foreign currency exchange (loss) gain, net 11,805,283 626,304 (19,693,543 ) — (7,261,956 ) Other financing cost, net (4,443,892 ) — (5,732,424 ) — (10,176,316 ) Income tax 17,754,010 798,639 27,924,430 — 46,477,079 Equity interest in net income of associated companies 46,101,188 1,325,723 (2,497,059 ) (44,929,585 ) 267 Net profit (loss) for year Ps. 52,724,427 Ps. (2,497,326 ) Ps. 50,251,687 Ps. (45,961,965 ) Ps. 54,516,823 Distribution of the net profit (loss) to: Equity owners of holding company 52,724,427 (2,497,326 ) 46,641,696 (44,302,600 ) 52,566,197 Non-controlling — — 3,609,991 (1,659,365 ) 1,950,626 Net profit (loss) Ps. 52,724,427 Ps. (2,497,326 ) Ps. 50,251,687 Ps. (45,961,965 ) Ps. 54,516,823 Other comprehensive income items: Net other comprehensive income (loss) to be reclassified to profit or loss in subsequent years: Effect of translation of foreign entities (61,223,458 ) (724,521 ) (64,314,032 ) 61,947,979 (64,314,032 ) Items not to be reclassified to profit or loss in subsequent years: Remeasurement of defined benefit plan, net of income tax effect 652,722 (1,603,145 ) 757,278 950,423 757,278 Equity investments at fair value (3,765,688 ) — (3,765,688 ) 3,765,688 (3,765,688 ) Total other comprehensive income items for the period Ps. (64,336,424 ) Ps. (2,327,666 ) Ps. (67,322,442 ) Ps. 66,664,090 Ps. (67,322,442 ) Total comprehensive income for the period Ps. (11,611,997 ) Ps. (4,824,992 ) Ps. (17,070,755 ) Ps. 20,702,125 Ps. (12,805,619 ) Comprehensive income for the period attributable to: Equity holders of the parent Ps. (11,611,997 ) Ps. (4,824,992 ) Ps. (16,035,363 ) Ps. 20,702,125 Ps. (11,770,227 ) Non-controlling — — (1,035,392 ) — (1,035,392 ) Ps. (11,611,997 ) Ps. (4,824,992 ) Ps. (17,070,755 ) Ps. 20,702,125 Ps. (12,805,619 ) Condensed consolidating statements of cash flows For the year ended December 31, 2016 Parent Wholly-owned Combined non-guarantor Eliminations Consolidated Operating activities: Profit before taxes Ps. 937,247 Ps. (5,537,427 ) Ps. 28,077,775 Ps. — Ps. 23,477,595 Non-cash (997,587 ) 19,800,396 209,821,118 — 228,623,927 Changes in working capital: 74,520,320 9,130,768 (93,359,195 ) (6,595,361 ) (16,303,468 ) Net cash flows provided by operating activities Ps. 74,459,980 Ps. 23,393,737 Ps. 144,539,698 Ps. (6,595,361 ) Ps. 235,798,054 Investing activities: Purchase of property, plant and equipment — (7,860,232 ) (130,846,925 ) — (138,707,157 ) Acquisition of intangibles — (4,947,506 ) (11,369,232 ) — (16,316,738 ) Dividends received from associates 21,950 — 5,988,938 (270,796 ) 5,740,092 Proceeds from sale of plant, property and equipment 20,078 — 95,522 — 115,600 Acquisition of business, net of cash acquired — (2,796,254 ) (1,823,813 ) 2,796,254 (1,823,813 ) Partial sale of shares of associate company 756,444 — 2,796,254 (3,552,698 ) — Investment in associates companies — 663,203 (666,690 ) — (3,487 ) Net cash flows provided by (used in) investing activities Ps. 798,472 Ps. (14,940,789 ) Ps. (135,825,946 ) Ps. (1,027,240 ) Ps. (150,995,503 ) Financing activities: Bank loans, net (39,598,698 ) — (21,792,115 ) — (61,390,813 ) Acquisition of no controlling interest — — (2,280,278 ) — (2,280,278 ) Interest paid (24,826,139 ) (7,972,827 ) (5,922,267 ) 6,595,361 (32,125,872 ) Paid-In — — (756,444 ) 756,444 — Sale of shares of subsidiaries — — 6,323,336 — 6,323,336 Repurchase of shares and others (7,092,385 ) — 71,138 — (7,021,247 ) Payment of dividends (13,437,168 ) — (643,585 ) 270,796 (13,809,957 ) Derivative financial instruments — — (351,213 ) — (351,213 ) Net cash flows (used in) financing activities Ps. (84,954,390 ) Ps. (7,972,827 ) Ps. (25,351,428 ) Ps. 7,622,601 Ps. (110,656,044 ) Net (decrease) increase in cash and cash equivalents (9,695,938 ) 480,121 (16,637,676 ) — (25,853,493 ) Adjustment to cash flow for exchange rate differences — — 3,911,844 — 3,911,844 Cash and cash equivalents at beginning of the period 13,803,584 1,468,036 29,888,412 — 45,160,032 Cash and cash equivalents at end of the period Ps. 4,107,645 Ps. 1,948,159 Ps. 17,162,579 Ps. — Ps. 23,218,383 Condensed consolidating statements of cash flows For the year ended December 31, 2017 Parent Wholly-owned Combined non-guarantor Eliminations Consolidated Operating activities: Profit before taxes Ps. 43,527,320 Ps. (12,182,970 ) Ps. 35,230,373 Ps. (9,477,879 ) Ps. 57,096,844 Non-cash (17,017,287 ) 30,000,109 171,062,158 11,635,563 195,680,543 Changes in working capital: (18,973,478 ) (9,486 ) (66,062,629 ) 50,040,581 (35,005,012 ) Net cash flows provided by operating activities Ps. 7,536,555 Ps. 17,807,653 Ps. 140,229,902 Ps. 52,198,265 Ps. 217,772,375 Investing activities: Purchase of property, plant and equipment 16,526 (5,571,410 ) (113,630,253 ) — (119,185,137 ) Acquisition of intangibles — (3,053,345 ) (14,485,196 ) — (17,538,541 ) Dividends received from associates 21,465,687 970,000 2,385,559 (22,435,687 ) 2,385,559 Proceeds from sale of plant, property and equipment — — 133,349 — 133,349 Acquisition of business, net of cash acquired — (3,381,505 ) (3,497,288 ) — (6,878,793 ) Investment in associates companies — 1,925,898 — (1,925,898 ) — Sale of associated company — — 340,040 — 340,040 Net cash flows provided by (used in) investing activities Ps. 21,482,213 Ps. (9,110,362 ) Ps. (128,753,789 ) Ps. (24,361,585 ) Ps. (140,743,523 ) Financing activities: Bank loans, net 13,548,138 — 16,382,838 (57,364,465 ) (27,433,489 ) Acquisition of no controlling interest — — (11,930 ) — (11,930 ) Interest paid (24,009,216 ) (7,092,098 ) (7,187,225 ) 7,092,098 (31,196,441 ) Repurchase of shares and others (1,240,028 ) — 6,657 — (1,233,371 ) Payment of dividends (14,406,748 ) — (24,120,329 ) 22,435,687 (16,091,390 ) Derivative financial instruments — — (71,474 ) — (71,474 ) Net cash flows used in financing activities Ps. (26,107,854 ) Ps. (7,092,098 ) Ps. (15,001,463 ) Ps. (27,836,680 ) Ps. (76,038,095 ) Net (decrease) increase in cash and cash equivalents 2,910,914 1,605,193 (3,525,350 ) — 990,757 Adjustment to cash flow for exchange rate differences — — 61,333 — 61,333 Cash and cash equivalents at beginning of the period 4,107,645 1,948,159 17,162,579 — 23,218,383 Cash and cash equivalents at end of the period Ps. 7,018,559 Ps. 3,553,352 Ps. 13,698,562 Ps. — Ps. 24,270,473 Condensed consolidating statements of cash flows For the year ended December 31, 2018 Parent Wholly-owned Combined non-guarantor Eliminations Consolidated Operating activities: Profit before taxes Ps. 70,478,437 Ps. (1,698,687 ) Ps. 78,176,117 Ps. (45,961,965 ) Ps. 100,993,902 Non-cash (23,099,316 ) 20,952,414 149,503,016 39,836,704 187,192,818 Changes in working capital: (49,040,542 ) (35,329,228 ) (61,332,380 ) 105,845,958 (39,856,192 ) Net cash flows provided by operating activities Ps. (1,661,421 ) Ps. (16,075,501 ) Ps. 166,346,753 Ps. 99,720,697 Ps. 248,330,528 Investing activities: Purchase of property, plant and equipment (17,709 ) (4,031,228 ) (139,839,096 ) — (143,888,033 ) Acquisition of intangibles — (2,993,373 ) (4,940,274 ) — (7,933,647 ) Dividends received from associates 24,314,803 — 2,622,237 (24,314,803 ) 2,622,237 Proceeds from sale of plant, property and equipment — — 178,532 — 178,532 Acquisition of business, net of cash acquired — — (310,604 ) — (310,604 ) Investment in associates companies — (5,092,881 ) — 5,092,881 — Sale of associated company — — 548,484 — 548,484 Net cash flows provided by (used in) investing activities Ps. 24,297,094 Ps. (12,117,482 ) Ps. (141,740,721 ) Ps. (19,221,922 ) Ps. (148,783,031 ) Financing activities: Bank loans, net 24,784,341 — 19,592,788 (78,428,052 ) (34,050,923 ) Acquisition of no controlling interest — — (115,821 ) — (115,821 ) Interest paid (24,802,363 ) 26,385,526 (6,066,654 ) (26,385,526 ) (30,869,017 ) Repurchase of shares and others (514,007 ) — 2,586 — (511,421 ) Payment of dividends (20,787,102 ) — (25,897,494 ) 24,314,803 (22,369,793 ) Redemption of hybrid bond — — (13,440,120 ) — (13,440,120 ) Net cash flows used in financing activities Ps. (21,319,131 ) Ps. 26,385,526 Ps. (25,924,715 ) Ps. (80,498,775 ) Ps. (101,357,095 ) Net (decrease) increase in cash and cash equivalents 1,316,542 (1,807,457 ) (1,318,683 ) — (1,809,598 ) Adjustment to cash flow for exchange rate differences — — (800,913 ) — (800,913 ) Cash and cash equivalents at beginning of the period 7,018,559 3,553,352 13,698,562 — 24,270,473 Cash and cash equivalents at end of the period Ps. 8,335,101 Ps. 1,745,895 Ps. 11,578,966 Ps. — Ps. 21,659,962

Basis of Preparation of the C_2

Basis of Preparation of the Consolidated Financial Statements and Summary of Significant Accounting Policies and Practices (Policies)	12 Months Ended
	Dec. 31, 2018
Text block [abstract]
Basis of preparation	a) Basis of preparation The accompanying consolidated financial statements have been prepared in conformity with International Financial Reporting Standards, as issued by the International Accounting Standards Board (“IASB”) (hereafter referred to as IFRS). The consolidated financial statements have been prepared on the historical cost basis, except for the derivative financial instruments, the trust assets of post-employment and other employee benefit plans and the investments in equity at fair value through OCI which are presented at their market value. Effectively July 1, 2018, the Argentinian economy is considered to be hyperinflationary in accordance with the criteria in IAS 29 “Financial Reporting in Hyperinflationary Economies” (“IAS 29”) The preparation of these consolidated financial statements under IFRS requires the use of critical estimates and assumptions that affect the amounts reported for certain assets, liabilities, income and expenses. It also requires that management exercise judgment in the application of the Company’s accounting policies. Actual results could differ from these estimates and assumptions. The Mexican peso is the functional currency of the Company’s Mexican operations and the consolidated reporting currency of the Company. i) Changes in Accounting Policies and Disclosures The Company applied IFRS 15 “Revenue from Contracts with Customers” Financial Instruments” The accounting policies applied in the preparation of the consolidated financial statements for the year ended December 31, 2018 are consistent with those used in the preparation of the Company´s consolidated annual financial statements for the years ended December 31, 2017 and 2016, with the exception of the following new standards and amendments to existing standards issued by the IASB, which were mandatory for annual periods beginning on or after January 1, 2018: a) IFRS 15 Revenue from contract with customer In May 2014, the IASB issued the new standard IFRS 15 IFRS 15 supersedes IAS 11 Construction Contracts Revenue IFRS 15 requires entities to exercise judgment, taking into consideration all of the relevant facts and circumstances when applying each step of the model to contracts with their customers. The standard also specifies the accounting for the incremental costs of obtaining a contract and the costs directly related to fulfilling a contract. In addition, the standard requires relevant disclosures. The Company adopted IFRS 15 using the modified retrospective method of adoption with the date of initial application on January 1, 2018. Under this method, the standard can be applied either to all contracts at the date of initial application or only to contracts that are not completed at this date. The Company elected to apply the standard to all contracts as of January 1, 2018. The cumulative effect of initially applying IFRS 15 was recognized at the date of initial application as an adjustment to the opening balance of retained earnings. Therefore, the comparative information was not restated and continues to be reported under IAS 11, IAS 18 and related Interpretations. The most significant changes in the implementation of IFRS 15 are the earlier recognition of revenue from the sale of goods, and the capitalization and deferral of the incremental contracts acquisition costs over the expected period of benefit. The effect of adopting IFRS 15 as of January 1, 2018 was, as follows: Reference Increase Assets: Subscribers, distributors, recoverable taxes, contract assets and other, net (a), (b), (c) Ps. 31,261,436 Liabilities: Current liabilities (c) Ps. 562,651 Deferred income taxes (d) 8,725,841 Ps. 9,288,492 Equity: Retained earnings (a), (b), (c), (d) 21,454,504 Non-controlling 518,440 Total equity 21,972,944 Total liabilities and equity Ps. 31,261,436 Set out below are, the impacts of adopting IFRS 15 on the Company´s consolidated financial statements for the year ended December 31, 2018: Reference As reported Figures without Adjustments Operating revenues: Revenues services (a), (b) Ps. 863,647,642 Ps. 881,530,167 Ps. (17,882,525 ) Sales of equipment (a), (b) 174,560,039 158,721,765 15,838,274 1,038,207,681 1,040,251,932 (2,044,251 ) Operating costs and expenses: Cost of sales and services Ps. 508,822,430 Ps. 509,100,174 Ps. (277,744 ) Commercial, administrative and general and other expenses (c) 234,115,500 240,010,631 (5,895,131 ) Depreciation and amortization 155,712,580 155,712,580 — 898,650,510 904,823,385 (6,172,875 ) 139,557,171 135,428,547 4,128,624 Financial items, net 38,563,536 38,356,359 207,177 Equity interest in net result of associated companies 267 267 — Income tax (d) 46,477,079 45,496,698 980,381 Non-controlling (1,950,626 ) (1,950,626 ) — Net profit for the year Ps. 52,566,197 Ps. 49,625,131 Ps. 2,941,066 Reference As reported Balances without Adjustments Assets: Current assets: Cash and cash equivalents and equity investments at fair value Ps. 70,675,896 Ps. 70,675,896 Ps. — Subscribers, distributors, recoverable taxes, contract assets and other, net (a), (b), (c) 216,226,920 185,303,634 30,923,286 Other current assets, net 62,152,708 62,152,708 — Total current assets 349,055,524 318,132,238 30,923,286 Non-current Property, plant and equipment, net 640,000,720 640,000,720 — Intangibles and other assets, net 424,485,276 424,485,276 — Subscribers, distributors, recoverable taxes, contract assets and other, net (a), (b), (c) 15,681,872 10,244,609 5,437,263 Total assets Ps. 1,429,223,392 Ps. 1,392,862,843 Ps. 36,360,549 Liabilities and equity: Current liabilities: Short-term debt and current portion of long-term debt Ps. 96,230,634 Ps. 96,230,634 Ps. — Accounts payable and other liabilities 338,116,412 337,448,940 667,472 Deferred revenues 32,743,843 32,315,690 428,153 Total current liabilities 467,090,889 465,995,264 1,095,625 Non-current-liabilities: Long-term debt 542,691,819 542,691,819 — Deferred income taxes (d) 24,573,441 15,382,500 9,190,941 Other liabilities 148,994,821 148,994,821 — Total liabilities 1,183,350,970 1,173,064,404 10,286,566 Total equity (d) 245,872,422 219,798,439 26,073,983 Total liabilities and equity Ps. 1,429,223,392 Ps. 1,392,862,843 Ps. 36,360,549 IFRS 15 Revenues from contracts with customers IFRS 15 establishes a comprehensive framework for determining when to recognize revenue and how much revenue to recognize. The principle core is that an entity should recognize revenue to depict the transfer of promised goods or services to the customer in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The most significant changes in the implementation of IFRS 15 are as follows: a. The Company provides fixed and mobile services. These services are offered independently in contracts with customers or together with the sale of handsets (mobile) under the postpaid model. In accordance with IFRS 15, the transaction price should be assigned to the different performance obligations based on their relative standalone selling price. The Company concluded that regarding the provided services, it has market observable information, to determine the standalone selling price of the services. On the other hand, in the case of the sale of bundled mobile phones sold (including service and handset) by the Company, the allocation of the sales is done based on their relative standalone selling price of each individual component related to the total bundled price. The result is that more equipment revenue is recognized at the moment of a sale and, therefore, less service revenue from the monthly fee are being recognized under the new standard. The Company concluded as well that the provided services are satisfied over the time of the contract period, given that the customer simultaneously receives and consumes the benefits provided by the Company. Such service bundles, voice and data, accomplish the criteria mentioned in IFRS 15 of being substantially similar and of having the same transfer pattern which is why the Company concluded that the revenue from these different services offered to its customers are considered as a single performance obligation with revenue being recognized over time, except for sales of equipment. b. Under IFRS 15, for those contracts with customers in which generally the sale of equipment and other electronic equipment is a single performance obligation, the Company recognizes the revenue at the moment when it transfers control to the customer which generally occurs when such goods are delivered. The latter is consistent with the previous accounting policy. c. The Company pays commissions to its distributors for obtaining new customers; such commissions were expensed as incurred under the previous accounting. Under IFRS 15, commissions are considered incremental contract acquisition costs that are capitalized and are amortized over the expected period of benefit, during the average duration of customer contracts. d. In addition to the adjustments described above, other items such as deferred taxes and non-controlling b) IFRS 9, Financial Instruments IFRS 9 was issued in July 2014 and replaced IAS 39 Financial Instruments The Company applied IFRS 9 prospectively, with an initial application date of January 1, 2018. The Company has not restated the comparative information, which continues to be reported under IAS 39. The effect of adopting IFRS 9 as of January 1, 2018 was, as follows: Adjustments January 1, 2018 Assets Trade receivables (a) Ps. (2,400,783 ) Deferred tax assets (b) 544,628 Total assets Ps. (1,856,155 ) Equity Retained earnings (a), (b) Ps. (1,856,155 ) Total adjustment on equity Ps. (1,856,155 ) IFRS 9 sets out the requirements for recognizing and measuring financial assets and financial liabilities. This new standard includes: a) Impairment The adoption of IFRS 9 has fundamentally changed the Company´s accounting for impairment losses for financial assets by replacing IAS 39’s incurred loss approach with a forward-looking expected credit loss approach. IFRS 9 requires the Company to recognize an allowance for expected credit loss for all debt instruments not held at fair value through profit or loss and contract assets. Upon adoption of IFRS 9 the Company recognized an impairment on the Company´s trade receivables at fair value Ps 2,400,783 as of January 1, 2018, which resulted in a decrease in Retained earnings. There were no impairment losses that impacted the carrying amount of debt instruments at fair value through OCI in the statements of financial position, which remains at fair value. b) Other adjustments In addition to the adjustments described above, other items such as deferred taxes and non-controlling The new requirements of IFRS 9 regarding hedge accounting do not have an effect on the consolidated financial statements as hedge accounting is not applied. The Company continues to consider the hedges to be under IAS 39 as allowed by IFRS 9. Compared to IAS 39, the application of IFRS 9 had an immaterial effect on the consolidated financial statements in 2018, including classification of financial assets and liabilities. c) Impact of the application for hyperinflation in Argentina In the recent years, the Argentina economy has shown high rates of inflation. Although inflation data has not been consistent in recent years and several indexes have coexisted, inflation in Argentina indicates that the three-year In order to restate for hyperinflation its financial statements, the subsidiary used the series of indices defined by resolution JG No. 539/18 issued by the “Federación Argentina de Consejos Profesionales de Ciencias Económicas” (FACPCE), based on the National Consumer Price Index (IPC) published by the Instituto Nacional de Estadística y Censos (INDEC) of the Argentine Republic and the Wholesale Internal Price Index (IPIM) published by FACPCE. The cumulative index December 31, 2018 is 184.255, while on an annual inflation for 2018 is 48%. The main implications are as follows: • Adjustment of the historical cost of non-monetary • The gain on the net monetary position caused by the impact of inflation in the year is included in the consolidated statements of comprehensive income as part of the caption “ Valuation of derivatives, interest cost from labor obligations and other financial items, net • All items in the financial statements of the Argentine company are translated at the closing exchange rate, which at December 31, 2018 was 0.5221 argentine pesos per mexican peso. • Financial information for financial years prior to 2018 are not restated. The main impact in the consolidated financial statements of the Company in 2018 of applying hyperinflationary accounting under IAS 29 are shown below: Impact of the Impact in: Operating revenues Ps. 6,286,140 Operating loss (1,423,252 ) Financial loss (1,289,317 ) Gain on net monetary positions 4,429,145 Income tax (770,928 ) Net profit for the year 945,647 Current assets 1,866,674 Non-current 19,796,073 Total liabilities 4,890,166 Total equity (i) 16,772,581 (i) This total includes the initial effect of hyperinflation of Ps. 15,826,934 and the net effect on results due to the hyperinflation of the year of Ps. 945,647. ii) Basis of consolidation The consolidated financial statements include the accounts of América Móvil, S.A.B. de C.V. and those subsidiaries over which the Company exercises control. The consolidated financial statements for the subsidiaries were prepared for the same period as the Company´s and applying consistent accounting policies. All of the subsidiary companies operate in the telecommunications sector or related. Subsidiaries are entities over which the Company has control. Control is achieved when the Company has power over the investee, when it is exposed to, or has rights to, variable returns from its involvement with the investee, and has the ability to use its power over the investee to affect the amount of the investor’s returns. Subsidiaries are consolidated on a line by line basis from the date which control is achieved by the Company. The Company reassesses whether or not it controls an investee if facts and circumstances indicate that there are changes to one or more of the elements of control. Changes in the Company’s ownership interests in a subsidiary that do not result in the Company losing control over the subsidiary are accounted for as equity transactions. The carrying amounts of the equity attributable to owners of the parent and non-controlling non-controlling Subsidiaries are deconsolidated from the date which control ceases. When the Company ceases to have control over a subsidiary, it derecognizes the assets (including any goodwill) and liabilities of the subsidiary at their carrying amounts, derecognizes the carrying amount of non-controlling All intra-Company balances and transactions, and any unrealized gains and losses arising from intra-Company transactions, are eliminated in preparing the consolidated financial statements. Non-controlling Non-controlling Associates: An associate is an entity over which the Company has significant influence. Significant influence is the power to participate in the financial and operating policy decisions of the investee but does not have control or joint control over those decisions. The Company’s investment in associates includes goodwill identified on acquisition, net of any accumulated impairment losses. The investments in associated companies in which the Company exercises significant influence are accounted for using the equity method, whereby Company recognizes its share in the net profit (losses) and equity of the associate. The results of operations of the subsidiaries and associates are included in the Company’s consolidated financial statements beginning as of the month following their acquisition and its share of other comprehensive income after acquisition is recognized directly in other comprehensive income. The Company assesses at each reporting date whether there is objective evidence that investment in associates is impaired. If so, the Company calculates the amount of impairment as the difference between the recoverable amount of the associate and its carrying value. The equity interest in the most significant subsidiaries at December 31, 2017 and 2018 is as follows: Company name Country Equity interest at 2017 2018 Subsidiaries: América Móvil B.V. a) Netherlands 100.0 % 100.0 % Compañía Dominicana de Teléfonos, S.A. (“Codetel”) b) Dominican Republic 100.0 % 100.0 % Sercotel, S.A. de C.V. a) Mexico 100.0 % 100.0 % Radiomóvil Dipsa, S.A. de C.V. and subsidiaries (“Telcel”) b) Mexico 100.0 % 100.0 % Puerto Rico Telephone Company, Inc. b) Puerto Rico 100.0 % 100.0 % Servicios de Comunicaciones de Honduras, S.A. de C.V. (“Sercom Honduras”) b) Honduras 100.0 % 100.0 % TracFone Wireless, Inc. (“TracFone”) b) USA 100.0 % 100.0 % Claro S.A. (Claro Brasil) b) Brazil 97.7 % 98.2 % Telecomunicaciones de Guatemala, S.A. (“Telgua”) b) Guatemala 99.3 % 99.3 % Empresa Nicaragüense de Telecomunicaciones, S.A. (“Enitel”) b) Nicaragua 99.6 % 99.6 % Compañía de Telecomunicaciones de El Salvador, S.A. de C.V. (“CTE”) b) El Salvador 95.8 % 95.8 % Comunicación Celular, S.A. (“Comcel”) b) Colombia 99.4 % 99.4 % Telmex Colombia, S.A. b) Colombia 99.3 % 99.3 % Consorcio Ecuatoriano de Telecomunicaciones, S.A. (“Conecel”) b) Ecuador 100.0 % 100.0 % AMX Argentina, S.A. b) Argentina 100.0 % 100.0 % AMX Paraguay, S.A. b) Paraguay 100.0 % 100.0 % AM Wireless Uruguay, S.A. b) Uruguay 100.0 % 100.0 % Claro Chile, S.A. b) Chile 100.0 % 100.0 % América Móvil Perú, S.A.C b) Peru 100.0 % 100.0 % Claro Panamá, S.A. b) Panamá 100.0 % 100.0 % Teléfonos de México, S.A.B. de C.V. b) Mexico 98.8 % 98.8 % Telekom Austria AG b) Austria 51.0 % 51.0 % a) Holding companies b) Operating companies of mobile and fixed services iii) Basis of translation of financial statements of foreign subsidiaries and associated companies The operating revenues of foreign subsidiaries jointly represent approximately 72%, 74% and 73% of consolidated operating revenues of 2016, 2017 and 2018, respectively, and their total assets jointly represent approximately 81% and 80% of consolidated total assets at December 31, 2017 and 2018, respectively. The financial statements of foreign subsidiaries have been prepared under or translated to IFRS in the respective local currency (which is their functional currency) and then translated into the Company´s reporting currency as follows: • all monetary assets and liabilities were translated at the closing exchange rate of the period; • all non-monetary • equity accounts are translated at the exchange rate at the time the capital contributions were made and the profits were generated; • revenues, costs and expenses are translated at the average exchange rate of the period, except for the operations of the subsidiaries in Argentina; whose economy is considered hyperinflationary since 2018; • the resulting difference from the translation process is recognized in equity in the caption Cumulative translation adjustment; • the consolidated statements of cash flows presented using the indirect method were translated using the weighted-average exchange rate for the applicable period (except for Argentina), and the resulting difference is shown in the consolidated statements of cash flows under the heading “Adjustment to cash flows due to exchange rate fluctuations, net”. The basis of translation for the operations of the subsidiaries in Argentina are described in Note 2i, c) The difference resulting from the translation process is recognized in equity in the caption “Effect of translation of foreign entities”. At December 31, 2017 and 2018, the cumulative translation adjustment was Ps. 7,866,158 and Ps. (53,357,300), respectively.
Revenue recognition	b) The Company revenues are derived principally from providing the following telecommunications services and products: wireless voice, wireless data and value-added services, fixed voice, fixed data, broadband and IT services, Pay TV and over-the-top The wireless voices services are offered under a variety of plans. In addition, the Company often bundle wireless data telecommunications services together with voices services. Monthly rent in post- paid is billed based on the associated plan o package rates, corresponding to when the services are provided. As part the wireless data services, the Company offer value-added services that include Internet access, messaging and other wireless entertainment and corporative services, Revenue from such services are recognized at the time they are provided, on the date the installation or when the services are downloaded. In addition, the Company offer other wireless services, including wireless security services, mobile payments solutions, machine-to-machine The fixed voices services include local, domestic and international long-distance and public telephone services, under a variety of plans, specifically tailored to our residential and corporate clients. Revenue from the local services are derived from the monthly rent for services and the long-distances revenues are recognized at the time the service is provided. The Company offer data services, including data centers, data administration and hosting services to our residential and corporate clients under a variety of plans. These revenues are recognized at the time the service is provided. The residential broadband access are typically bundled with voice services and are competitively priced as a function of the desired or available speed. As a complement to these services, the Company offer a number of products such as home networking and smart home services. In addition, The Company provide different IT solutions for small business and large corporations. The Company offer Pay TV through cable and satellite TV subscriptions to both retail and corporate customers under a variety of plans. These services are offered through individual subscription plans as well as in bundled packages of services, along with broadband, fixed voice and wireless services. In addition, the Company sell video, audio and other media content that is delivered through the internet directly from the content provider to the viewer or end user. These revenues are recognized at the time the service is provided. The Company sells to its customers bundles of different services (fixed line, mobile, broadband internet, streaming and pay TV, among others) which elements are evaluated to determine if it is necessary to separate the different identifiable components and apply the income recognition policy corresponding to each element. Total package revenue is allocated among the identified elements based on their respective standalone selling prices. Determining standalone selling prices for each identified element requires estimates that are complex due to the nature of the business. A change in estimates of standalone selling prices could affect the apportionment of revenue among the elements and, as a result, the timing of recognition of revenues. Transaction prices are allocated to the performance obligations by reference to the relative stand-alone selling prices of the products and services. The stand-alone selling prices of products are based on the market prices of alternative providers whereas the stand-alone selling prices of services are available separately, as services are also offered on a stand-alone basis, i.e. without hardware. Some subsidiaries have loyalty programs where the Company awards credits customer credit awards referred as “points”. The customer can redeem accrued “points” for awards such as devices, accessories or airtime. The Company provides all awards. The consideration allocated to the award credits is identified as a separate performance obligation; the corresponding liability of the award credits is measured at its fair value. The consideration allocated to award credits amount is recognized as a contract liability until the points are redeemed. Revenue is recognized upon redemption of products by the customer.
Cost of sales	c) The cost of mobile equipment and computers is recognized at the time the client and distributor receives the device that is when the control is are transferred to the customer.
Cost of services	d) The cost of services represents the costs incurred to properly deliver the services to the customers, it includes the network operating costs and licenses related costs and is accounted at the moment in which such services are provided.
Commissions to distributors	e) The Company pays commissions to its distributors different than those that acquire customers. Such commissions are recognized in “commercial, administrative and general expenses” in the consolidated statements of comprehensive income at the time in which the distributor either reports an activation or reaches certain number of lines activated or obtained at a certain point of time.
Cash and cash equivalents	f) Cash and cash equivalents represent bank deposits and liquid investments with maturities of less than three months. These amounts are stated at cost plus accrued interest, which is similar to their market value. The Company also maintains restricted cash held as collateral to meet certain contractual obligations. Restricted cash is presented as part of “Other assets” within other non-current
Equity investments at fair value through OCI and other short-term investments	g) Equity investments at fair value through OCI and other short-term investments are primarily composed of equity investments and other short-term financial investments. Amounts are initially recorded at their estimated fair value. Fair value adjustments for equity investments are recorded through other comprehensive income, while fair value adjustments for other short-term investments are recorded in the Consolidated Statements of Comprehensive Income as they occur.
Inventories	h) Inventories are initially recognized at historical cost and are valued using the average cost method without exceeding their net realizable value. The estimate of the realizable value of inventories on-hand
Business combinations and goodwill	i) Business combinations are accounted for using the acquisition method, which in accordance with IFRS 3, “ Business acquisitions (i) Identify the acquirer (ii) Determine the acquisition date (iii) Value the acquired identifiable assets and assumed liabilities (iv) Recognize the goodwill or a bargain purchase gain For acquired subsidiaries, goodwill represents the difference between the purchase price and the fair value of the net assets acquired at the acquisition date. The investment in acquired associates includes goodwill identified on acquisition, net of any impairment loss. Goodwill is reviewed annually to determine its recoverability or more often if circumstances indicate that the carrying value of the goodwill might not be fully recoverable. The possible loss of value in goodwill is determined by analyzing the recovery value of the cash generating unit (or the group thereof) to which the goodwill is associated at the time it was originated. If this recoverable amount is lower than the carrying value, an impairment loss is charged to the results of operations. The recoverable amount is determined based on the higher of fair value less cost of disposal or value in use. For the years ended December 31, 2016, 2017 and 2018, no impairment losses were recognized for the goodwill shown in the Company’s consolidated statements of financial position.
Property, plant and equipment	j) Property, plant and equipment i) Property, plant and equipment are recorded at acquisition cost, net of accumulated depreciation. Depreciation is computed on the cost of the assets using the straight line method, based on the estimated useful lives of the related assets, beginning the month after they become available for use. Borrowing costs that are incurred for general financing for construction in progress for periods exceeding six months are capitalized as part of the cost of the asset. During 2016, 2017 and 2018 the borrowing costs that were capitalized amounted to Ps. 2,861,307, Ps. 2,875,034 and Ps. 2,020,288 respectively. In addition to the purchase price and costs directly attributable to preparing an asset in terms of its physical location and condition for operating as intended by management, when required, the cost also includes the estimated costs of dismantling and removal of the asset and for restoration of the site where it is located (See Note 15c). ii) The net book value of property, plant and equipment is removed from the consolidated statements of financial position at the time the asset is sold or when no future economic benefits are expected from its use or sale. Any gains or losses on the sale of property, plant and equipment represent the difference between net proceeds of the sale and the net book value of the item at the time of sale. These gains or losses are recognized as either other operating income or other operating expenses upon sale. iii) The Company periodically assesses the residual values, useful lives and depreciation methods associated with its property, plant and equipment. If necessary, the effects of any changes in accounting estimates is recognized prospectively, at the closing of each period, in accordance with IAS 8, “ Accounting Policies, Changes in Accounting Estimates and Errors For property, plant and equipment made up of several components with different useful lives, the major individual components are depreciated over their individual useful lives. Maintenance costs and repairs are expensed as incurred. Annual depreciation rates are as follows: Network infrastructure 5 %-33% Buildings and leasehold improvement 2 %-33% Other assets 10 %-50% iv) The carrying value of property, plant and equipment is reviewed if there are indicators of impairment in such assets. If an asset’s recovery value is less than the asset’s net carrying value, the difference is recognized as an impairment loss. During the years ended December 31, 2016, 2017 and 2018, no impairment losses were recognized. v) Spare parts for network operation is valued using the average cost method, without exceeding its net realizable value. The valuation of inventory for network considered obsolete, defective or slow-moving, is reduced to their estimated net realizable value. The estimate of the recovery value of inventories is based on their age and turnover.
Intangibles	k) i) Licenses Licenses to operate wireless telecommunications networks granted by the governments of the countries in which the Company operates are recorded at acquisition cost or at fair value at their acquisition date, net of accumulated amortization. Certain licenses require payments to the governments, such payments are recognized in the cost of service and equipment. The licenses that in accordance with government requirements are categorized as automatically renewable, for a nominal cost and with substantially consistent terms, are considered by the Company as intangible assets with an indefinite useful life. Accordingly, they are not amortized. Licenses are amortized when the Company does not have a basis to conclude that they are indefinite lived. Licenses are amortized using the straight-line method over a period ranging from 3 to 30 years, which represents the usage period of the assets. The Company has conducted an internal analysis on the applicability of the International Financial Reporting Interpretation Committee (“IFRIC”) No. 12 (Service Concession Agreements) and has concluded that its concessions are outside the scope of IFRIC 12. To determine the applicability of IFRIC 12, the Company analyzes each concession or group of similar concessions in a given jurisdiction. As a threshold matter, the Company identifies those government concessions that provide for the development, financing, operation or maintenance of infrastructure used to render a public service, and that set out performance standards, mechanisms for adjusting prices and arrangements for arbitrating disputes. With respect to those services, the Company evaluates whether the grantor controls or regulates (i) what services the operator must provide, (ii) to whom it must provide them and (iii) the applicable price (the “Services Criterion”). In evaluating whether the applicable government, as grantor, controls the price at which the Company provides its services, the Company looks at the terms of the concession agreement according to all applicable regulations. If the Company determines that the concession under analysis meets the Services Criterion, then the Company evaluates whether the grantor would hold a significant residual interest in the concession’s infrastructure at the end of the term of the arrangement. ii) Trademarks Trademarks are recorded at their fair value at the valuation date when acquired. The useful lives of trademarks are assessed as either definite or indefinite. Trademarks with finite useful lives are amortized using the straight-line method over a period ranging from 1 to 10 years. Trademarks with indefinite useful lives are not amortized, but are tested for impairment annually at the cash generating unit level. The assessment of indefinite life is reviewed annually to determine whether the indefinite life continues to be supportable, if not, the change in useful life from indefinite to definite is made on a prospective basis. iii) Irrevocable rights of use Irrevocable rights of use are recognized according to the amount paid for the right and are amortized over the period in which they are granted. The carrying values of the Company’s licenses and trademarks are reviewed annually and whenever there are indicators of impairment in the value of such assets. When an asset’s recoverable amount, which is the higher of the asset’s fair value, less disposal costs and its value in use (the present value of future cash flows), is less than the asset’s carrying value, the difference is recognized as an impairment loss. iv) Customer relationships The value of customer relations is determined and valued at the time that a new subsidiary is acquired, as determined by the Company with the assistance of independent appraisers, and is amortized on a 5 year period. During the years ended December 31, 2016, 2017 and 2018, no impairment losses were recognized for licenses, trademarks, irrevocable rights of use or customer relationships.
Impairment in the value of long-lived assets	l) The Company assesses the existence of indicators of impairment in the carrying value of long-lived assets, investments in associates, goodwill and intangible assets according to IAS 36 “ Impairment of assets pre-tax In the estimation of impairments, the Company uses the strategic plans established for the separate cash-generating units to which the assets are assigned. Such strategic plans generally cover a period from 3 to 5 years. For longer periods, beginning in the fifth year, projections are based on such strategic plans while applying a constant or declining expected perpetual growth rate. Key assumptions used in value in use calculations The forecasts are made in real terms (net of inflation) and in the functional currency of the subsidiary as of December 31, 2018. Financial forecasts, premises and assumptions are similar to what any other market participant in similar conditions would consider. Local synergies, that any other market participant would not have taken into consideration to prepare similar forecasted financial information, have not been included. The assumptions used to develop the financial forecasts were validated for each of the cash generating units (“CGUs”), typically identified by country and by service (in the case of Mexico) taking into consideration the following: • Current subscribers and expected growth. • Type of subscribers (prepaid, postpaid, fixed line, multiple services) • Market environment and penetration expectations • New products and services • Economic environment of each country • Expenses for maintaining the current assets • Investments in technology for expanding the current assets • Market consolidation and synergies The foregoing forecasts could differ from the results obtained through time; however, the Company prepares its estimates based on the current situation of each of the CGUs. The recoverable amounts are based on value in use. The value in use is determined based on the method of discounted cash flows. The key assumptions used in projecting cash flows are: • Margin on EBITDA is determined by dividing EBITDA (operating income plus depreciation and amortization) by total revenues. • Margin on CAPEX is determined by dividing capital expenditures (“CAPEX”) by total revenues. • Pre-tax As discount rate, the Company uses the WACC which was determined for each of the cash generating units and is described in the following paragraphs. The estimated discount rates to perform the IAS 36 “ Impairment of assets The discount rates represent the current market assessment of the risks specific to each CGU, taking into consideration the time value of money and individual risks of the underlying assets that have not been incorporated in the cash flow estimates. The discount rate calculation is based on the specific circumstances of the Company and its operating segments. The WACC takes into account both debt and equity costs. The cost of equity is derived from the expected return on investment for each GCU. The cost of debt is based on the interest-bearing borrowings the Company is obliged to service. Segment-specific risk is incorporated by applying individual beta factors. The beta factors are evaluated annually based on publicly available market data. Market participant assumptions are important because, not only do they include industry data for growth rates, but also management assesses how the CGU’s position, relative to its competitors, might change over the forecasted period. The most significant forward-looking estimates used for the 2017 and 2018 impairment evaluations are shown below: Average margin on Average margin on Average pre-tax 2017: Europe (7 countries) 25.59% - 52.46% 7.34% - 14.97% 9.06% - 19.04% Brazil (fixed line, wireless and TV) 35.28% 22.13% 11.71% Puerto Rico 23.31% 8.31% 4.42% Dominican Republic 45.79% 15.55% 19.23% Mexico (fixed line and wireless) 35.48% 8.72% 16.13% Ecuador 37.83% 10.07% 23.57% Peru 29.64% 16.75% 13.61% El Salvador 40.36% 17.99% 25.14% Chile 22.04% 12.45% 6.15% Colombia 41.93% 19.88% 19.06% Other countries 9.16% - 48.18% 0.43% - 23.43% 7.89% - 24.28% Average margin on Average margin on Average pre-tax 2018: Europe (7 countries) 22.13% - 41.51% 8.13% - 19.40% 8.36% - 22.08% Brazil (fixed line, wireless and TV) 36.43% 21.88% 10.38% Puerto Rico 23.86% 9.89% 4.81% Dominican Republic 48.64% 18.43% 17.66% Mexico (fixed line and wireless) 36.33% 7.93% 16.30% Ecuador 39.83% 11.26% 24.45% Peru 30.29% 19.95% 11.52% El Salvador 45.36% 22.61% 18.01% Chile 25.91% 14.99% 6.62% Colombia 45.01% 17.14% 20.29% Other countries 7.90% - 45.91% 0.61% - 23.96% 9.97% - 31.63% Sensitivity to changes in assumptions: The implications of the key assumptions for the recoverable amount are discussed below: Margin on CAPEX- The Company performed a sensitivity analysis by increasing its CAPEX by 5% and maintaining all other assumptions the same. The sensitivity analysis would require the Company to adjust the amount of its long-lived assets in its CGUs with potential impairment of approximately Ps. 1,558,823 WACC- Additionally, should the Company increase by 50 base points in WACC per CGU and maintain all other assumptions the same, the carrying amount of the long-lived assets, would be impaired by approximately Ps. 1,135,854.
Leases	m) The determination of whether an agreement is, or contains, a lease is based on the substance of the agreement and requires the Company to assess if performance of the agreement is dependent on the use of a specific asset and whether the agreement transfers the right of use of the asset to the Company. Operating leases Leases under which the lessor retains a significant portion of the risks and benefits inherent to the ownership of the leased asset are considered operating leases. Payments made under operating lease agreements are charged to results of operations on a straight-line basis over the rental period. Finance leases Lease agreements that substantially transfer all the risks and benefits of ownership of the leased assets to the Company are accounted for as finance leases. Accordingly, upon commencement of the lease, the asset, which is classified based on its nature, and its associated debt are recorded at the lower of the fair value of the leased asset or the present value of the lease payments. Finance lease payments are apportioned between the reduction of lease liability and the finance cost so that a constant interest rate is determined on the outstanding liability balance. Finance costs are charged to results of operations over the life of the agreement.
Financial assets and liabilities	n) Financial assets Initial recognition and measurement Financial assets are classified, at initial recognition, as subsequently measured at amortized cost, fair value through other comprehensive income (OCI), and fair value through profit or loss. The classification of financial assets at initial recognition depends on the financial asset’s contractual cash flow characteristics and the Company’s business model for managing them, with the exception of trade receivables that do not contain a significant financing component or for which the Company has applied the practical expedient, the Company initially measures a financial asset at its fair value plus, in the case of a financial asset not at fair value through profit or loss, transaction costs. – Subsequent measurement For purposes of subsequent measurement, financial assets are classified in four categories: • Financial assets at amortized cost (debt instruments) • Financial assets at fair value through OCI with recycling of cumulative gains and losses (debt instruments) • Financial assets designated at fair value through OCI with no recycling of cumulative gains and losses upon derecognition (equity instruments) • Financial assets at fair value through profit or loss Financial assets at amortized cost (debt instruments) The Company measures financial assets at amortized cost if both of the following conditions are met: • The financial asset is held within a business model with the objective to hold financial assets in order to collect contractual cash flows, and • The contractual terms of the financial asset give rise on specified dates to cash flows that are solely payments of principal and interest on the principal amount outstanding Financial assets at amortized cost are subsequently measured using the effective interest (EIR) method and are subject to impairment. Gains and losses are recognized in profit or loss when the asset is derecognized, modified or impaired. The Company’s financial assets at amortized cost includes cash and cash equivalents, loans and receivables. Financial assets at fair value through OCI with recycling of cumulative gains and losses (debt instruments) The Company measures debt instruments at fair value through OCI if both of the following conditions are met: • The financial asset is held within a business model with the objective of both holding to collect contractual cash flows and selling, and • The contractual terms of the financial asset give rise on specified dates to cash flows that are solely payments of principal and interest on the principal amount outstanding For debt instruments at fair value through OCI, interest income, foreign exchange revaluation and impairment losses or reversals are recognized in the statements of profit or loss and computed in the same manner as for financial assets measured at amortized cost. The remaining fair value changes are recognized in OCI. Upon derecognition, the cumulative fair value change recognized in OCI is recycled to profit or loss. Financial assets designated at fair value through OCI with no recycling of cumulative gains and losses upon derecognition (equity instruments) Upon initial recognition, the Company can elect to classify irrevocably its equity investments as equity instruments designated at fair value through OCI when they meet the definition of equity under IAS 32 Financial Instruments: Presentation and are not held for trading. The classification is determined on an instrument by instrument basis. Gains and losses on these financial assets are never recycled to profit or loss. Dividends are recognized as other income in the statements of profit or loss when the right of payment has been established, except when the Company benefits from such proceeds as a recovery of part of the cost of the financial asset, in which case, such gains are recorded in OCI. Equity instruments designated at fair value through OCI are not subject to impairment assessment. Financial assets at fair value through profit or loss Financial assets at fair value through profit or loss include financial assets held for trading, financial assets designated upon initial recognition at fair value through profit or loss, or financial assets mandatorily required to be measured at fair value. Financial assets are classified as held for trading if they are acquired for the purpose of selling or repurchasing in the near term. Derivatives, including separated embedded derivatives, are also classified as held for trading unless they are designated as effective hedging instruments. Financial assets with cash flows that are not solely payments of principal and interest are classified and measured at fair value through profit or loss, irrespective of the business model. Notwithstanding the criteria for debt instruments to be classified at amortized cost or at fair value through OCI, as described above, debt instruments may be designated at fair value through profit or loss on initial recognition if doing so eliminates, or significantly reduces, an accounting mismatch. Financial assets at fair value through profit or loss are carried in the statements of financial position at fair value with net changes in fair value recognized in the consolidated statements of comprehensive income within “Valuation of derivatives, interest cost from labor obligations and other financial items”. Derecognition of financial assets A financial asset is primarily derecognized when: • The rights to receive cash flows from the asset have expired, or • The Company has transferred its rights to receive cash flows from the asset or has assumed an obligation to pay the received cash flows in full without material delay to a third party under a ‘pass-through’ arrangement; and either (a) the Company has transferred substantially all the risks and rewards of the asset, or (b) the Company has neither transferred nor retained substantially all the risks and rewards of the asset, but has transferred control of the asset When the Company has transferred its rights to receive cash flows from an asset or has entered into a passthrough arrangement, it evaluates if, and to what extent, it has retained the risks and rewards of ownership. When it has neither transferred nor retained substantially all the risks and rewards of the asset, nor transferred control of the asset, the Company continues to recognize the transferred asset to the extent of its continuing involvement. In that case, the Company also recognizes an associated liability. The transferred asset and the associated liability are measured on a basis that reflects the rights and obligations that the Company has retained. Impairment of financial assets The Company recognizes an allowance for expected credit losses (ECLs) for all debt instruments not held at fair value through profit or loss. ECLs are based on the difference between the contractual cash flows due in accordance with the contract and all the cash flows that the Company expects to receive, discounted at an approximation of the original effective interest rate. The expected cash flows will include cash flows from the sale of collateral held or other credit enhancements that are integral to the contractual terms. ECLs are recognized in two stages. For credit exposures for which there has not been a significant increase in credit risk since initial recognition, ECLs are provided for credit losses that result from default events that are possible within the next 12-months 12-month For some based on available information loss rate approach Financial liabilities Initial recognition Financial liabilities are classified, at initial recognition, as financial liabilities at fair value through profit or loss, loans and borrowings, payables, or as derivatives designated as hedging instruments in an effective hedge, as appropriate. All financial liabilities are recognized initially at fair value and, in the case of loans and borrowings and payables, net of directly attributable transaction costs. The Company’s financial liabilities include trade and other payables, loans and borrowings including bank overdrafts, and derivative financial instruments. — Subsequent measurement The measurement of financial liabilities depends on their classification, as described below: Financial liabilities at fair value through profit or loss financial liabilities at fair value through profit or loss include financial liabilities held for trading and financial liabilities designated upon initial recognition as at fair value through profit or loss. IFRS Financial liabilities are classified as held for trading if they are incurred for the purpose of repurchasing in the near term. This category also includes derivative financial instruments entered into by the Company that are not designated as hedging instruments in hedge relationships as defined by IFRS 9. Separated embedded derivatives are also classified as held for trading unless they are designated as effective hedging instruments. Gains or losses on liabilities held for trading are recognized in the statements of profit or loss. Financial liabilities designated upon initial recognition at fair value through profit or loss are designated at the initial date of recognition, and only if the criteria in IFRS 9 are satisfied. The Company has not designated any financial liability as at fair value through profit or loss. Loans and borrowings After initial recognition, interest-bearing loans and borrowings are subsequently measured at amortized cost using the EIR method. Gains and losses are recognized in profit or loss when the liabilities are derecognized as well as through the EIR amortization process. Amortized cost is calculated by taking into account any discount or premium on acquisition and fees or costs that are an integral part of the EIR. The EIR amortization is included as finance costs in the statements of profit or loss. Derecognition of financial liabilities A financial liability is derecognized when the obligation under the liability is discharged, cancelled or expires. When an existing financial liability is replaced by another from the same lender on substantially different terms, or the terms of an existing liability are substantially modified, such an exchange or modification is treated as the derecognition of the original liability and the recognition of a new liability. The difference in the respective carrying amounts is recognized in the statements of profit or loss. Offsetting of financial instruments Financial assets and financial liabilities are offset and the net amount is reported in the consolidated statements of financial position if there is a currently enforceable legal right to offset the recognized amounts and there is an intention to settle on a net basis, to realize the assets and settle the liabilities simultaneously.
Transactions in foreign currency	o) Transactions in foreign currency are initially recorded at the prevailing exchange rate at the time of the related transactions. Foreign currency denominated assets and liabilities are subsequently translated at the prevailing exchange rate at the financial statements reporting date. Exchange differences determined from the transaction date to the time foreign currency denominated assets and liabilities are settled or translated at the financial statements reporting date are charged or credited to the results of operations. In determining the spot exchange rate to use on initial recognition of the related asset, expense or income (or part of it) on the derecognition of a non-monetary non-monetary non-monetary non-monetary The exchange rates used for the translation of foreign currencies against the Mexican peso are as follows: Average exchange rate Closing exchange rate Country or Zone Currency 2016 2017 2018 2017 2018 Argentina (1) Argentine Peso (AR$) 1.2632 1.1489 0.7311 1.0610 0.5221 Brazil Real (R$) 5.3868 5.9346 5.2937 5.9815 5.0797 Colombia Colombian Peso (COP$) 0.0061 0.0064 0.0065 0.0066 0.0061 Guatemala Quetzal 2.4548 2.5755 2.5591 2.6940 2.5440 U.S.A. (2) US Dollar 18.6529 18.9400 19.2397 19.7867 19.6829 Uruguay Uruguay Peso 0.6206 0.6606 0.6274 0.6869 0.6074 Nicaragua Cordoba 0.6515 0.6307 0.6097 0.6428 0.6088 Honduras Lempira 0.8109 0.8007 0.7994 0.8330 0.8031 Chile Chilean Peso 0.0276 0.0292 0.0300 0.0322 0.0283 Paraguay Guaraní 0.0033 0.0034 0.0034 0.0035 0.0033 Peru Sol (PEN$) 5.5232 5.8054 5.8517 6.0976 5.8406 Dominican Republic Dominican Peso 0.4048 0.3983 0.3876 0.4095 0.3898 Costa Rica Colon 0.0338 0.0331 0.0332 0.0346 0.0322 European Union Euro 20.6334 21.3649 22.7101 23.7539 22.5586 Bulgaria Lev 10.5483 10.9223 11.6110 12.1406 11.5327 Belarus New Belarusian Ruble 9.3929 9.8087 9.4451 9.9882 9.1319 Croatia Croatian Kuna 2.7392 2.8619 3.0613 3.1954 3.0435 Macedonia Macedonian Denar 0.3350 0.3471 0.3688 0.3861 0.3667 Serbia Serbian Denar 0.1676 0.1762 0.1920 0.2009 0.1907 (1) Year-end Financial reporting in hyperinflationary economies Financial statements of Argentina subsidiaries are restated before translation to the reporting currency of the Company and before consolidation in order to reflect the same value of money for all items. Items recognized in the statements of financial position which are not measured at the applicable year-end non-monetary net-position (2) Includes U.S.A., Ecuador, El Salvador, Puerto Rico and Panama. As of April 9, 2019, the exchange rate between the US dollar and the Mexican Peso was $18.9701.
Accounts payable, accrued liabilities and provisions	p) Liabilities are recognized whenever (i) the Company has current obligations (legal or assumed) resulting from a past event, (ii) when it is probable the obligation will give rise to a future cash disbursement for its settlement, and (iii) the amount of the obligation can be reasonably estimated. When the effect of the time value of money is significant, the amount of the liability is determined as the present value of the expected disbursements to settle the obligation. The discount rate is determined on a pre-tax Contingent liabilities are recognized only when it is probable they will give rise to a future cash disbursement for their settlement. Also, contingencies are only recognized when they will generate a loss.
Employee benefits	q) The Company has defined benefit pension plans for its subsidiaries Puerto Rico Telephone Company, Teléfonos de Mexico, Claro Brasil, and Telekom Austria. Claro Brasil also has medical plans and defined contribution plans and Telekom Austria provides retirement benefits to its employees under a defined contribution plan. The Company recognizes the costs of these plans based upon independent actuarial computations and are determined using the projected unit credit method. The latest actuarial computations were prepared as of December 31, 2018. Mexico Mexican subsidiaries have the obligation to pay seniority premiums to personnel based on the Mexican Federal labor law which also establishes the obligation to make certain payments to personnel who cease to provide services under certain circumstances. Pensions (for Telmex) and seniority premiums are determined based on the salary of employees in their final year of service, the number of years worked at and their age at the moment of retirement. The costs of pensions, seniority premiums and severance benefits, are recognized based on calculations by independent actuaries using the projected unit credit method using financial hypotheses, net of inflation. Telmex has established an irrevocable trust fund and makes annual contributions to that fund. Puerto Rico In Puerto Rico, the Company has noncontributing pension plans for full-time employees, which are tax qualified as they meet Employee Retirement Income Security Act of 1974 requirements. The pension benefit is composed of two elements: (i) An employee receives an annuity at retirement if they meet the rule of 85 (age at retirement plus accumulated years of service). The annuity is calculated by applying a percentage times years of services to the last three years of salary. (ii) The second element is a lump-sum Brazil Claro Brasil provides a defined benefit plan and post-retirement medical assistance plan, and a defined contribution plan, through a pension fund that supplements the government retirement benefit for certain employees. Under the defined benefit plan, the Company makes monthly contributions to the pension fund equal to 17.5% of the employee’s aggregate salary. In addition, the Company contributes a percentage of the aggregate salary base for funding the post-retirement medical assistance plan for the employees who remain in the defined benefit plan. Each employee makes contributions to the pension fund based on age and salary. All newly hired employees automatically adhere to the defined contribution plan and no further admittance to the defined benefit plan is allowed. For the defined contribution plan, see Note 17. Austria Telekom Austria provides retirement benefits to its employees under defined contribution and defined benefit plans. The Company pays contributions to publicly or privately administered pension or severance insurance plans on mandatory or contractual basis. Once the contributions have been paid, the Company has no further payment obligations. The regular contributions are recognized as employee expenses in the year in which they are due. All other employee benefit obligations provided in Austria are unfunded defined benefit plans for which the Company records provisions which are calculated using the projected unit credit method. The future benefit obligations are measured using actuarial methods on the basis of an appropriate assessment of the discount rate, rate of employee turnover, rate of compensation increase and rate of increase in pensions. For severance and pensions, the subsidiary recognizes actuarial gains and losses in other comprehensive income. The re-measurement “Valuation of derivatives, interests cost from labor obligation and other financial items, net” Other subsidiaries For the rest of the Company’s subsidiaries, there are no defined benefit plans or compulsory defined contribution structures. However, certain subsidiaries make contributions to national pension, social security and severance plans in accordance with the percentages and rates established by the applicable social security and labor laws of each country. Such contributions are made to the entities designated by the countries legislation and are recorded as direct labor expenses in the consolidated statements of comprehensive income as they are incurred. Remeasurements of defined benefit plans, comprising of actuarial gains and losses, the effect of the asset ceiling, excluding net interest and the return on plan assets (excluding net interest), are recognized immediately in the consolidated statements of financial position with a corresponding debit or credit to retained earnings through OCI in the period in which they occur. Re-measurements Past service costs are recognized in profit or loss on the earlier of: (i) The date of the plan amendment or curtailment, and (ii) The date that the Company recognizes restructuring-related costs Net interest on liability for defined benefits is calculated by applying the discount rate to the net defined benefit liability or asset and it is recognized in the “valuation of derivatives, interest cost from labor obligations and other financial items” in the consolidated statements of comprehensive income. The Company recognizes the changes in the net defined benefit obligation under “Cost of sales and services” and “Commercial, administrative and general expenses” in the consolidated statements of comprehensive income. Paid absences The Company recognizes a provision for the cost of paid absences, such as vacation time, based on the accrual method.
Employee profit sharing	r) Employee profit sharing is paid by certain subsidiaries of the Company to its eligible employees. The Company has employee profit sharing in Mexico, Ecuador and Peru. In Mexico, employee profit sharing is computed at the rate of 10% on the individual subsidiaries taxable base adjusted for employee profit sharing purposes as provided by law. Employee profit sharing is presented as an operating expense in the consolidated statements of comprehensive income.
Taxes	s) Income taxes Current income tax payable is presented as a short-term liability, net of prepayments made during the year. Deferred income tax is determined using the liability method based on the temporary differences between the tax values of the assets and liabilities and their book values at the consolidated financial statements reporting date. Deferred tax assets and liabilities are measured using the tax rates that are expected to be in effect in the period when the asset will materialize or the liability will be settled, based on the enacted tax rates (and tax legislation) that have been enacted or substantially enacted at the financial statements reporting date. The value of deferred tax assets is reviewed by the Company at each financial statements reporting date and is reduced to the extent that it is more likely that the Company will not have sufficient future tax profits to allow for the realization of all or a part of its deferred tax assets. Unrecognized deferred tax assets are revalued at each financial statements reporting date and are recognized when it is more likely that there will be sufficient future tax profits to allow for the realization of these assets. Deferred taxes relating to items recognized in Other Comprehensive Income are recognized together with the concept that generated such deferred taxes. Deferred taxes consequence on unremitted earnings from subsidiaries and associates are considered as temporary differences, when the timing of the reversal of the temporary differences can be controlled and it is probable that the temporary differences will not reverse in the foreseeable future. Taxes withheld on remitted foreign earnings are creditable against Mexican taxes, thus to the extent that a remittance is to be made, the deferred tax would be limited to the incremental difference between the Mexican tax rate and the rate of the remitting country. As of December 31, 2017 and 2018, the Company has not provided for any deferred taxes related to unremitted foreign earnings. The Company offsets tax assets and liabilities if it has a legally enforceable right to set off current tax assets and current tax liabilities and the deferred tax assets and deferred tax liabilities relate to income taxes levied by the same tax authority. Sales tax Revenues, expenses and assets are recognized net of the amount of sales tax, except: • When the sales tax incurred on a purchase of assets or services is not recoverable from the taxation authority, in which case, the sales tax is recognized as part of the cost of acquisition of the asset or as part of the expense item, as applicable. • Receivables and payables that are stated with the amount of sales tax included. The net amount of sales tax recoverable from, or payable to, the tax authorities is included as part of the current receivables or payables in the consolidated statements of financial position unless they are due in more than a year in which case they are classified as non-current.
Advertising	t) Advertising expenses are recognized as incurred. For the years ended December 31, 2016, 2017 and 2018, advertising expenses were Ps. 28,180,538, Ps. 28,718,563 and Ps. 26,255,952 , respectively, and are presented in the consolidated statements of comprehensive income in the caption “Commercial, administrative and general expenses”.
Earnings per share	u) Basic and diluted earnings per share are determined by dividing net profit of the year by the weighted-average number of shares outstanding during the year. In determining the weighted average number of outstanding shares, shares repurchased by the Company have been excluded.
Financial risks	v) The main risks associated with the Company’s financial instruments are: (i) liquidity risk, (ii) market risk (foreign currency exchange risk and interest rate risk) and (iii) credit risk and counterparty risk. The Board of Directors approves the policies submitted by management to mitigate these risks. i) Liquidity risk Liquidity risk is the risk that the Company may not meet its financial obligations associated with financial instruments when they are due. The Company’s financial obligations and commitments are included in Notes 14 and 16. ii) Market risk The Company is exposed to certain market risks derived from changes in interest rates and fluctuations in exchange rates of foreign currencies. The Company’s debt is denominated in foreign currencies, mainly in US dollars and euros, other than its functional currency. In order to reduce the risks related to fluctuations in the exchange rate of foreign currency, the Company uses derivative financial instruments such as cross-currency swaps and forwards to adjust exposures resulting from foreign exchange currency. The Company does not use derivatives to hedge the exchange risk arising from having operations in different countries. Additionally, the Company occasionally uses interest rate swaps to adjust its exposure to the variability of the interest rates or to reduce their financing costs. The Company’s practices vary from time to time depending on judgments about the level of risk, expectations of change in the movements of interest rates and the costs of using derivatives. The Company may terminate or modify a derivative financial instrument at any time. See Note 7 for disclosure of the fair value of derivatives as of December 31, 2017 and 2018. iii) Credit risk Credit risk represents the loss that could be recognized in case the counterparties fail to comply with their contractual obligations. The financial instruments that potentially represent concentrations of credit risk are cash and short-term deposits, trade accounts receivable and financial instruments related to debt and derivatives. The Company’s policy is designed in order to limit its exposure to any one financial institution; therefore, the Company’s financial instruments are contracted with several different financial institutions located in different geographic regions. The credit risk in accounts receivable is diversified because the Company has a broad customer base that is geographically dispersed. The Company continuously evaluates the credit conditions of its customers and generally does not require collateral to guarantee collection of its accounts receivable. The Company monitors on a monthly basis its collection cycle to avoid deterioration of its results of operations. A portion of the Company’s cash surplus is invested in short- term deposits with financial institutions with high credit ratings. iv) Sensitivity analysis for market risks The Company uses sensitivity analyses to measure the potential losses based on a theoretical increase of 100 basis points in interest rates and a 5% fluctuation in exchange rates: Interest rate In the event that the Company’s agreed-upon interest rates at December 31, 2018 increased/(decreased) by 100 basis points, the increase in net interest expense would increase/(decrease) by Ps. 32,136,984 and Ps. (31,773,439), respectively. Exchange rate fluctuations Should the Company’s debt at December 31, 2018 of Ps. 638,922,453, suffer a 5% increase/(decrease) in exchange rates, the debt would increase/(decrease) by Ps. 3,165,958 and Ps. (10,940,798), respectively.
Derivative financial instruments	w) Derivative financial instruments are recognized in the consolidated statements of financial position at fair value. Valuations obtained by the Company are compared against those of the financial institutions with which the agreements are entered into, and it is the Company’s policy to compare such fair value to a valuation provided by an independent pricing provider in case of discrepancies. Changes in the fair value of derivatives that do not qualify as hedging instruments are recognized immediately in the line “Valuation of derivatives, interest cost from labor obligations and other financial items, net”. The Company is exposed to interest rate and foreign currency risks, which tries to mitigate through a controlled risk management program that includes the use of derivative financial instruments. The Company principally uses to offset the risk of exchange rate and interest rate fluctuations. Additionally, for the years ended December 31, 2017 certain of the Company’s derivative financial instruments had been designated, and had qualified, as cash flow hedges. The effective portion of gains or losses on the cash flow derivatives is recognized in equity under the heading “Effect for fair value of derivatives”, and the ineffective portion is charged to results of operations of the period.
Current versus non-current classification	x) The Company presents assets and liabilities in its consolidated statements of financial position based on current/non-current An asset is current when it is either: (i) Expected to be realized or intended to be sold or consumed in the normal operating cycle. (ii) Held primarily for the purpose of trading. (iii) Expected to be realized within twelve months after the reporting period. (iv) Cash and cash equivalents unless restricted from being exchanged or used to settle a liability for at least twelve months after the reporting period. A liability is current when: • It is expected to be settled in the normal operating cycle. • It is held primarily for the purpose of trading. • It is due to be settled within twelve months after the reporting period. • There is no unconditional right to defer the settlement of the liability for at least twelve months after the reporting period. The Company classifies all other assets and liabilities, including deferred tax assets and liabilities, as non-current.
Presentation of consolidated statements of comprehensive income	y) The costs and expenses shown in the consolidated statements of comprehensive income are presented in combined manner (based on both their function and nature), which allows a better understanding of the components of the Company’s operating income. This classification allows a comparison to the telecommunications industry. The Company presents operating income in its consolidated statements of comprehensive income since it is a key indicator of the Company’s performance. Operating income represents operating revenues less operating costs and expenses. The employee benefits expense recognized for the years ended December 31, 2016, 2017 and 2018 of Ps. 46,759,415, Ps. 48,696,331 and Ps. 47,671,143, respectively is presented as “Cost of sales and services” and of Ps. 63,691,855, Ps. 66,920,537 and Ps. 67,936,876, respectively is presented in “Commercial, administrative and general expenses”.
Operating segments	z) Operating segments Segment information is presented based on information used by management in its decision-making processes. Segment information is presented based on the geographic areas in which the Company operates. The management of the Company is responsible for making decisions regarding the resources to be allocated to the Company’s different segments, as well as evaluating the performance of each segment. Intersegment revenues and costs, intercompany balances as well as investments in shares in consolidated entities are eliminated upon consolidation and reflected in the “eliminations” column in Note 22. None of the segments records revenue from transactions with a single external customer amounting to 10% or more of the revenues.
Convenience translation	Aa) At December 31, 2018, amounts in U.S. dollars have been included in the consolidated financial statements solely for the convenience of the reader and amounts this translation is not accordance with IFRS have been translated from Mexican pesos at December 31, 2018 at an exchange rate of Ps. 19.6829 per U.S. dollar, which was the exchange rate at that date. Such translation should not be construed as a representation that the Mexican peso can be converted to U.S. dollars at the exchange rate in effect on December 31, 2018 or any other exchange rate.
Significant accounting judgments, estimates and assumptions	Ab) In preparing its consolidated financial statements, the Company makes estimates concerning a variety of matters. Some of these matters are highly uncertain, and its estimates involve judgments it makes based on the available information. In the discussion below, the Company has identified several of these matters for which its financial statements would be materially affected if either (1) the Company uses different estimates that it could have reasonably used or (2) in the future América Móvil changes its estimates in response to changes that are reasonably likely to occur. The following discussion addresses only those estimates that the Company considers most important based on the degree of uncertainty and the likelihood of a material impact had it used a different estimate. There are many other areas in which the Company uses estimates about uncertain matters, but the reasonably likely effect of changed or different estimates is not material to the financial presentation for those other areas. Estimated useful lives of plant, property and equipment The Company currently depreciates most of its network infrastructure based on an estimated useful life determined upon the expected particular conditions of operation and maintenance in each of the countries in which it operates. The estimates are based on AMX’s historical experience with similar assets, anticipated technological changes and other factors, taking into account the practices of other telecommunications companies. The Company reviews estimated useful lives each year to determine, for each particular class of assets, whether they should be changed. The Company may shorten/extend the estimated useful life of an asset class in response to technological changes, changes in the market or other developments. This results in increased/decreased depreciation expense. See Notes 2j) and 10. Impairment of Long-Lived Assets The Company has large amounts of long-lived assets, including property, plant and equipment, intangible assets, investments in affiliates and goodwill on its consolidated statements of financial position. The Company is required to test long-lived assets for impairment when circumstances indicate a potential impairment or, in some cases, at least on an annual basis. The impairment analysis for long-lived assets requires the Company to estimate the recoverable amount of the asset, which is the higher of its fair value (minus any disposal costs) and its value in use. To estimate the fair value of a long-lived asset, the Company typically takes into account recent market transactions or, if no such transactions can be identified, the Company uses a valuation model that requires making certain assumptions and estimates. Similarly, to estimate the value in use of long-lived assets, the Company typically makes various assumptions about the future prospects for the business to which the asset relates, considers market factors specific to that business and estimates future cash flows to be generated by that business. Based on this impairment analysis, including all assumptions and estimates related thereto, as well as guidance provided by IFRS relating to the impairment of long-lived assets different assumptions and estimates could materially impact the Company’s reported financial results. More conservative assumptions of the anticipated future benefits from these businesses could result in impairment charges, which would decrease net income and result in lower asset values on the consolidated statements of financial position. Conversely, less conservative assumptions could result in smaller or no impairment charges, higher net income and higher asset values. The key assumptions used to determine the recoverable amount for the Company’s CGUs, are further explained in Notes 2l), 10 and 11. Deferred Income Taxes The Company is required to estimate its income taxes in each of the jurisdictions in which it operates. This process involves the jurisdiction-by-jurisdiction In assessing the future realization of deferred tax assets, the Company considers future taxable income, ongoing planning strategies and future results in its operations. In the event that the estimates of projected future taxable income are lowered, or changes in current tax regulations are enacted that would impose restrictions on the timing or extent of the ability to utilize the tax benefits of net operating loss carry-forwards in the future, an adjustment to the recorded amount of deferred tax assets would be made, with a related charge to income. See Note 13. Accruals Accruals are recorded when, at the end of the period, the Company has a present obligation as a result of past events, whose settlement requires an outflow of resources that is considered probable and can be measured reliably. This obligation may be legal or constructive, arising from, but not limited to, regulation, contracts, common practice or public commitments, which have created a valid expectation for third parties that the Company will assume certain responsibilities. The amount recorded is the best estimation performed by the Company’s management in respect of the disbursement that will be required to settle the obligations, considering all the information available at the date of the financial statements, including the opinion of external experts, such as legal advisors or consultants. Accruals are adjusted to account for changes in circumstances for ongoing matters and the establishment of additional accruals for new matters. If the Company is unable to reliably measure the obligation, no accrual is recorded and information is then presented in the notes to its consolidated financial statements. Because of the inherent uncertainties in these estimations, actual expenditures may be different from the originally estimated amount recognized. “See Note 15.” The Company is subject to various claims and contingencies related to tax, labor and legal proceedings as described in Note 16c). Labor Obligations The Company recognizes liabilities on its consolidated statements of financial position and expenses in its statements of comprehensive income to reflect its obligations related to its post-retirement seniority premiums, pension and retirement plans in the countries in which it operates and offer defined contribution and benefit pension plans. The amounts the Company recognizes are determined on an actuarial basis that involves estimations and accounts for post-retirement and termination benefits. The Company uses estimates in four specific areas that have a significant effect on these amounts: (i) the rate of return the Company assumes its pension plans will earn on its investments, (ii) the salaries increase rate that the Company assumes it will observe in future years, (iii) the discount rates that the Company uses to calculate the present value of its future obligations and (iv) the expected inflation rate. The assumptions applied are further disclosed in Note 17. These estimates are determined based on actuarial studies performed by independent experts using the projected unit-credit method.
Retrospective adjustment	ac) Te following amounts in the consolidated statements of comprehensive income for the years ended December 31, 2016 and 2017, have been retrospectively reclassified to conform to the presentation for the year ended December 31, 2018. In the Consolidated Statements of Comprehensive Income: As reported 2016 Retrospective 2016 As adjustments Operating revenues: Mobile voice services Ps. 242,302,380 Ps. (242,302,380 ) Ps. — Fixed voice services 95,299,154 (95,299,154 ) — Mobile data services 256,936,895 (256,936,895 ) — Fixed data services 126,278,206 (126,278,206 ) — Pay television 78,268,778 (78,268,778 ) — Other related services 32,799,952 (32,799,952 ) — Revenues services — 831,885,365 831,885,365 Ps. 831,885,365 Ps. — Ps. 831,885,365 As reported 2017 Retrospective 2017 As adjustments Operating revenues: Mobile voice services Ps. 221,751,600 Ps. (221,751,600 ) Ps. — Fixed voice services 89,856,743 (89,856,743 ) — Mobile data services 308,526,994 (308,526,994 ) — Fixed data services 139,277,613 (139,277,613 ) — Pay television 86,882,606 (86,882,606 ) — Other related services 32,115,767 (32,115,767 ) — Revenues services — 878,411,323 878,411,323 Ps. 878,411,323 Ps. — Ps. 878,411,323

Basis of Preparation of the C_3

Basis of Preparation of the Consolidated Financial Statements and Summary of Significant Accounting Policies and Practices (Tables)	12 Months Ended
	Dec. 31, 2018
Text block [abstract]
Schedule of Effect of Adoption of IFRS 15	The effect of adopting IFRS 15 as of January 1, 2018 was, as follows: Reference Increase Assets: Subscribers, distributors, recoverable taxes, contract assets and other, net (a), (b), (c) Ps. 31,261,436 Liabilities: Current liabilities (c) Ps. 562,651 Deferred income taxes (d) 8,725,841 Ps. 9,288,492 Equity: Retained earnings (a), (b), (c), (d) 21,454,504 Non-controlling 518,440 Total equity 21,972,944 Total liabilities and equity Ps. 31,261,436
Schedule of Impact of Adoption IFRS 15 on Company's Financial Statements	Set out below are, the impacts of adopting IFRS 15 on the Company´s consolidated financial statements for the year ended December 31, 2018: Reference As reported Figures without Adjustments Operating revenues: Revenues services (a), (b) Ps. 863,647,642 Ps. 881,530,167 Ps. (17,882,525 ) Sales of equipment (a), (b) 174,560,039 158,721,765 15,838,274 1,038,207,681 1,040,251,932 (2,044,251 ) Operating costs and expenses: Cost of sales and services Ps. 508,822,430 Ps. 509,100,174 Ps. (277,744 ) Commercial, administrative and general and other expenses (c) 234,115,500 240,010,631 (5,895,131 ) Depreciation and amortization 155,712,580 155,712,580 — 898,650,510 904,823,385 (6,172,875 ) 139,557,171 135,428,547 4,128,624 Financial items, net 38,563,536 38,356,359 207,177 Equity interest in net result of associated companies 267 267 — Income tax (d) 46,477,079 45,496,698 980,381 Non-controlling (1,950,626 ) (1,950,626 ) — Net profit for the year Ps. 52,566,197 Ps. 49,625,131 Ps. 2,941,066 Reference As reported Balances without Adjustments Assets: Current assets: Cash and cash equivalents and equity investments at fair value Ps. 70,675,896 Ps. 70,675,896 Ps. — Subscribers, distributors, recoverable taxes, contract assets and other, net (a), (b), (c) 216,226,920 185,303,634 30,923,286 Other current assets, net 62,152,708 62,152,708 — Total current assets 349,055,524 318,132,238 30,923,286 Non-current Property, plant and equipment, net 640,000,720 640,000,720 — Intangibles and other assets, net 424,485,276 424,485,276 — Subscribers, distributors, recoverable taxes, contract assets and other, net (a), (b), (c) 15,681,872 10,244,609 5,437,263 Total assets Ps. 1,429,223,392 Ps. 1,392,862,843 Ps. 36,360,549 Liabilities and equity: Current liabilities: Short-term debt and current portion of long-term debt Ps. 96,230,634 Ps. 96,230,634 Ps. — Accounts payable and other liabilities 338,116,412 337,448,940 667,472 Deferred revenues 32,743,843 32,315,690 428,153 Total current liabilities 467,090,889 465,995,264 1,095,625 Non-current-liabilities: Long-term debt 542,691,819 542,691,819 — Deferred income taxes (d) 24,573,441 15,382,500 9,190,941 Other liabilities 148,994,821 148,994,821 — Total liabilities 1,183,350,970 1,173,064,404 10,286,566 Total equity (d) 245,872,422 219,798,439 26,073,983 Total liabilities and equity Ps. 1,429,223,392 Ps. 1,392,862,843 Ps. 36,360,549
Schedule of Effect of Adoption of IFRS 9 in Retained Earnings and Other Components of Equity	The effect of adopting IFRS 9 as of January 1, 2018 was, as follows: Adjustments January 1, 2018 Assets Trade receivables (a) Ps. (2,400,783 ) Deferred tax assets (b) 544,628 Total assets Ps. (1,856,155 ) Equity Retained earnings (a), (b) Ps. (1,856,155 ) Total adjustment on equity Ps. (1,856,155 )
Schedule of Impact in Consolidated Financial Statements upon Application of Hyperinflation	The main impact in the consolidated financial statements of the Company in 2018 of applying hyperinflationary accounting under IAS 29 are shown below: Impact of the Impact in: Operating revenues Ps. 6,286,140 Operating loss (1,423,252 ) Financial loss (1,289,317 ) Gain on net monetary positions 4,429,145 Income tax (770,928 ) Net profit for the year 945,647 Current assets 1,866,674 Non-current 19,796,073 Total liabilities 4,890,166 Total equity (i) 16,772,581 (i) This total includes the initial effect of hyperinflation of Ps. 15,826,934 and the net effect on results due to the hyperinflation of the year of Ps. 945,647.
Summary of Equity Interest in Most Significant Subsidiaries	The equity interest in the most significant subsidiaries at December 31, 2017 and 2018 is as follows: Company name Country Equity interest at 2017 2018 Subsidiaries: América Móvil B.V. a) Netherlands 100.0 % 100.0 % Compañía Dominicana de Teléfonos, S.A. (“Codetel”) b) Dominican Republic 100.0 % 100.0 % Sercotel, S.A. de C.V. a) Mexico 100.0 % 100.0 % Radiomóvil Dipsa, S.A. de C.V. and subsidiaries (“Telcel”) b) Mexico 100.0 % 100.0 % Puerto Rico Telephone Company, Inc. b) Puerto Rico 100.0 % 100.0 % Servicios de Comunicaciones de Honduras, S.A. de C.V. (“Sercom Honduras”) b) Honduras 100.0 % 100.0 % TracFone Wireless, Inc. (“TracFone”) b) USA 100.0 % 100.0 % Claro S.A. (Claro Brasil) b) Brazil 97.7 % 98.2 % Telecomunicaciones de Guatemala, S.A. (“Telgua”) b) Guatemala 99.3 % 99.3 % Empresa Nicaragüense de Telecomunicaciones, S.A. (“Enitel”) b) Nicaragua 99.6 % 99.6 % Compañía de Telecomunicaciones de El Salvador, S.A. de C.V. (“CTE”) b) El Salvador 95.8 % 95.8 % Comunicación Celular, S.A. (“Comcel”) b) Colombia 99.4 % 99.4 % Telmex Colombia, S.A. b) Colombia 99.3 % 99.3 % Consorcio Ecuatoriano de Telecomunicaciones, S.A. (“Conecel”) b) Ecuador 100.0 % 100.0 % AMX Argentina, S.A. b) Argentina 100.0 % 100.0 % AMX Paraguay, S.A. b) Paraguay 100.0 % 100.0 % AM Wireless Uruguay, S.A. b) Uruguay 100.0 % 100.0 % Claro Chile, S.A. b) Chile 100.0 % 100.0 % América Móvil Perú, S.A.C b) Peru 100.0 % 100.0 % Claro Panamá, S.A. b) Panamá 100.0 % 100.0 % Teléfonos de México, S.A.B. de C.V. b) Mexico 98.8 % 98.8 % Telekom Austria AG b) Austria 51.0 % 51.0 % a) Holding companies b) Operating companies of mobile and fixed services
Summary of Annual Depreciation Rates	Annual depreciation rates are as follows: Network infrastructure 5 %-33% Buildings and leasehold improvement 2 %-33% Other assets 10 %-50%
Summary of Most Significant Forward Looking Estimates Used for Impairment Evaluations	The most significant forward-looking estimates used for the 2017 and 2018 impairment evaluations are shown below: Average margin on Average margin on Average pre-tax 2017: Europe (7 countries) 25.59% - 52.46% 7.34% - 14.97% 9.06% - 19.04% Brazil (fixed line, wireless and TV) 35.28% 22.13% 11.71% Puerto Rico 23.31% 8.31% 4.42% Dominican Republic 45.79% 15.55% 19.23% Mexico (fixed line and wireless) 35.48% 8.72% 16.13% Ecuador 37.83% 10.07% 23.57% Peru 29.64% 16.75% 13.61% El Salvador 40.36% 17.99% 25.14% Chile 22.04% 12.45% 6.15% Colombia 41.93% 19.88% 19.06% Other countries 9.16% - 48.18% 0.43% - 23.43% 7.89% - 24.28% Average margin on Average margin on Average pre-tax 2018: Europe (7 countries) 22.13% - 41.51% 8.13% - 19.40% 8.36% - 22.08% Brazil (fixed line, wireless and TV) 36.43% 21.88% 10.38% Puerto Rico 23.86% 9.89% 4.81% Dominican Republic 48.64% 18.43% 17.66% Mexico (fixed line and wireless) 36.33% 7.93% 16.30% Ecuador 39.83% 11.26% 24.45% Peru 30.29% 19.95% 11.52% El Salvador 45.36% 22.61% 18.01% Chile 25.91% 14.99% 6.62% Colombia 45.01% 17.14% 20.29% Other countries 7.90% - 45.91% 0.61% - 23.96% 9.97% - 31.63%
Summary of Exchange Rates Used forTranslation of Foreign Currencies	The exchange rates used for the translation of foreign currencies against the Mexican peso are as follows: Average exchange rate Closing exchange rate Country or Zone Currency 2016 2017 2018 2017 2018 Argentina (1) Argentine Peso (AR$) 1.2632 1.1489 0.7311 1.0610 0.5221 Brazil Real (R$) 5.3868 5.9346 5.2937 5.9815 5.0797 Colombia Colombian Peso (COP$) 0.0061 0.0064 0.0065 0.0066 0.0061 Guatemala Quetzal 2.4548 2.5755 2.5591 2.6940 2.5440 U.S.A. (2) US Dollar 18.6529 18.9400 19.2397 19.7867 19.6829 Uruguay Uruguay Peso 0.6206 0.6606 0.6274 0.6869 0.6074 Nicaragua Cordoba 0.6515 0.6307 0.6097 0.6428 0.6088 Honduras Lempira 0.8109 0.8007 0.7994 0.8330 0.8031 Chile Chilean Peso 0.0276 0.0292 0.0300 0.0322 0.0283 Paraguay Guaraní 0.0033 0.0034 0.0034 0.0035 0.0033 Peru Sol (PEN$) 5.5232 5.8054 5.8517 6.0976 5.8406 Dominican Republic Dominican Peso 0.4048 0.3983 0.3876 0.4095 0.3898 Costa Rica Colon 0.0338 0.0331 0.0332 0.0346 0.0322 European Union Euro 20.6334 21.3649 22.7101 23.7539 22.5586 Bulgaria Lev 10.5483 10.9223 11.6110 12.1406 11.5327 Belarus New Belarusian Ruble 9.3929 9.8087 9.4451 9.9882 9.1319 Croatia Croatian Kuna 2.7392 2.8619 3.0613 3.1954 3.0435 Macedonia Macedonian Denar 0.3350 0.3471 0.3688 0.3861 0.3667 Serbia Serbian Denar 0.1676 0.1762 0.1920 0.2009 0.1907 (1) Year-end Financial reporting in hyperinflationary economies Financial statements of Argentina subsidiaries are restated before translation to the reporting currency of the Company and before consolidation in order to reflect the same value of money for all items. Items recognized in the statements of financial position which are not measured at the applicable year-end non-monetary net-position (2) Includes U.S.A., Ecuador, El Salvador, Puerto Rico and Panama.
Summary of Retrospective Reclassification of Financial Statements	Thefollowing amounts in the consolidated statements of comprehensive income for the years ended December 31, 2016 and 2017, have been retrospectively reclassified to conform to the presentation for the year ended December 31, 2018. In the Consolidated Statements of Comprehensive Income: As reported 2016 Retrospective 2016 As adjustments Operating revenues: Mobile voice services Ps. 242,302,380 Ps. (242,302,380 ) Ps. — Fixed voice services 95,299,154 (95,299,154 ) — Mobile data services 256,936,895 (256,936,895 ) — Fixed data services 126,278,206 (126,278,206 ) — Pay television 78,268,778 (78,268,778 ) — Other related services 32,799,952 (32,799,952 ) — Revenues services — 831,885,365 831,885,365 Ps. 831,885,365 Ps. — Ps. 831,885,365 As reported 2017 Retrospective 2017 As adjustments Operating revenues: Mobile voice services Ps. 221,751,600 Ps. (221,751,600 ) Ps. — Fixed voice services 89,856,743 (89,856,743 ) — Mobile data services 308,526,994 (308,526,994 ) — Fixed data services 139,277,613 (139,277,613 ) — Pay television 86,882,606 (86,882,606 ) — Other related services 32,115,767 (32,115,767 ) — Revenues services — 878,411,323 878,411,323 Ps. 878,411,323 Ps. — Ps. 878,411,323

Accounts receivable from subs_2

Accounts receivable from subscribers, distributors, recoverable taxes contractual assets and other, net (Tables)	12 Months Ended
	Dec. 31, 2018
Statement [LineItems]
Summary of Analysis of Accounts Receivable by Component	a) At December 31, 2017 2018 Subscribers and distributors Ps. 178,722,706 Ps. 173,053,226 Telecommunications carriers for network interconnection and other services 8,671,416 5,543,263 Recoverable taxes (i) 40,477,188 46,706,298 Sundry debtors 14,736,340 12,685,281 Contractual assets (Note 2i, a) — 34,718,749 Impairment of trade receivables (39,044,925 ) (40,798,025 ) Total net Ps. 203,562,725 Ps. 231,908,792 Non-current 9,786,581 15,681,872 Total current subscribers, distributors and contractual assets Ps. 193,776,144 Ps. 216,226,920 (i) In accordance with the favorable resolution obtained from the authorities, in 2018 the subsidiary Claro Brasil recognized a benefit for the exclusion of the Tax on the Circulation of Goods and the Provision of Services (Imposto sobre a Circulação de Mercadorias e Prestação de Serviços, or “ICMS “) in the calculation bases of the Social Integration Program (Social Integration Program, or” PIS “) and the Contribution for the Financing of Social Security (Contribution to or Financing of Social Security, or” COFINS “) in the amount total of Ps. 12,295,869, that includes interest of Ps. 6,127,656. The asset was recognized based on the certainty of obtaining the economic benefit.
Schedule of Changes in Allowance for Expected Credit Losses	b) Changes in the allowance for expected credit losses is as follows: For the years ended December 31, 2016 2017 2018 Balance at beginning of year Ps. (27,495,158 ) Ps. (37,351,677 ) Ps. (39,044,925 ) Increases recorded in expenses (16,987,769 ) (20,766,362 ) (19,535,707 ) Adjustment on initial application of IFRS 9 (Note 2i, b) — — (2,400,783 ) Write-offs 12,587,567 17,713,992 15,497,254 Translation effect (5,456,317 ) 1,359,122 4,686,136 Balance at end of year Ps. (37,351,677 ) Ps. (39,044,925 ) Ps. (40,798,025 )
Summary of Analysis of Contract Assets and Liabilities	e) An analysis of contract assets and liabilities at December 31, 2018 is as follows: 2018 Contract Assets: Balance at the beginning of the year Ps. 29,640,953 Additions 32,029,279 Disposals (25,243,487 ) Translation effect (1,707,996 ) Balance at the end of the year Ps. 34,718,749 Non-current Ps. 5,437,263 Current portion contracts assets Ps. 29,281,486
Receivable from subscribers and distributors [member]
Statement [LineItems]
Summary of Aging of Accounts Receivable	c) The following table shows the aging of accounts receivable at December 31, 2017 and 2018, for subscribers and distributors: Past due Total Unbilled services a-30 days 31-60 61-90 Greater than December 31, 2017 Ps. 178,722,706 Ps. 78,384,174 Ps. 46,758,825 Ps. 6,780,671 Ps. 4,375,188 Ps. 42,423,848 December 31, 2018 Ps. 173,053,226 Ps. 62,623,654 Ps. 46,816,302 Ps. 6,315,277 Ps. 4,168,952 Ps. 53,129,041
Summary of Accounts Receivable from Subscribers and Distributors Included in the Allowance for Doubtful Accounts	d) The following table shows the accounts receivable from subscribers and distributors included in the impairments of trade receivables, as of December 31, 2017 and 2018: Total 1-90 Greater than December 31, 2017 Ps. 39,044,925 Ps. 3,807,945 Ps. 35,236,980 December 31, 2018 Ps. 40,798,025 Ps. 4,079,803 Ps. 36,718,222

Related Parties (Tables)

Related Parties (Tables)	12 Months Ended
	Dec. 31, 2018
Text block [abstract]
Summary of Analysis of the Balances with Related Parties	a) The following is an analysis of the balances with related parties as of December 31, 2017 and 2018. All of the companies were considered affiliates of América Móvil since the Company’s principal shareholders are either direct or indirect shareholders in the related parties. 2017 2018 Accounts receivable: Sears Roebuck de México, S.A. de C.V. Ps. 211,491 Ps. 264,976 Sanborns Hermanos, S.A. 91,233 312,706 Patrimonial Inbursa, S.A. 246,874 214,180 Carso Infraestructura y Construcción, S.A. de C.V. and Subsidiaries 89,585 179,852 Grupo Condumex, S.A. de C.V. and Subsidiaries 47,269 35,007 Operadora de Sites Mexicanos, S.A. de C.V. 14,252 16,634 Other 167,526 240,250 Total Ps. 868,230 Ps. 1,263,605 2017 2018 Accounts payable: Carso Infraestructura y Construcción, S.A. de C.V. and Subsidiaries Ps. 947,761 Ps. 1,403,414 Grupo Condumex, S.A. de C.V. and Subsidiaries 812,427 784,678 Grupo Financiero Inbursa, S.A.B. de C.V. 38,847 235,745 Fianzas Guardiana Inbursa, S.A. de C.V. 276,633 227,014 PC Industrial, S.A. de C.V. and Subsidiaries 136,859 83,502 Enesa, S.A. de C.V. and Subsidiaries 50,609 22,630 Other 277,276 217,230 Total Ps. 2,540,412 Ps. 2,974,213
Summary of Transactions with Related Parties	b) For the years ended December 31, 2016, 2017 and 2018, the Company conducted the following transactions with related parties: 2016 2017 2018 Investments and expenses: Construction services, purchases of materials, inventories and property, plant and equipment (i) Ps. 9,917,280 Ps. 11,030,944 Ps. 7,211,960 Rent of towers 4,748,503 5,326,366 6,168,592 Insurance premiums, fees paid for administrative and operating services, brokerage services and others (ii) 4,118,469 4,135,578 4,134,380 Other services 1,899,818 2,802,667 1,864,017 Ps. 20,684,070 Ps. 23,295,555 Ps. 19,378,949 Revenues: Revenues services Ps. 411,076 Ps. 416,047 Ps. 679,220 Sales of equipment 2,679,591 2,313,840 1,296,204 Ps. 3,090,667 Ps. 2,729,887 Ps. 1,975,424 i) In 2018, this amount includes Ps.5,622,791 (Ps. 9,829,991 in 2017 and Ps. 9,547,530 in 2016) for network construction services and construction materials purchased from subsidiaries of Grupo Carso, S.A.B. de C.V. (Grupo Carso). ii) In 2018, this amount includes Ps. 778,191 (Ps. 789,253 in 2017 and Ps. 812,247 in 2016) for network maintenance services performed by Grupo Carso subsidiaries; Ps. 13,784 in 2018 (Ps. 15,695 in 2017, and Ps. 705,074 in 2016) for software services provided by an associate; Ps. 2,541,703 in 2018 (Ps. 3,330,038 in 2017 and Ps. 2,406,058 in 2016) for insurance premiums with Seguros Inbursa S.A. and Fianzas Guardiana Inbursa, S.A., which, in turn, places most of such insurance with reinsurers.

Derivative Financial Instrume_2

Derivative Financial Instruments (Tables)	12 Months Ended
	Dec. 31, 2018
Text block [abstract]
Schedule of Derivative Financial Instruments Contracted	An analysis of the derivative financial instruments contracted by the Company at December 31, 2017 and 2018 is as follows: At December 31, 2017 2018 Instrument Notional amount in Fair Value Notional amount in Fair Value Assets: Swaps US Dollar-Mexican peso US$ 2,800 Ps.4,766,102 US$ 3,490 Ps. 2,058,831 Swaps Euro-Mexican peso € — — — — Swaps Yen-US ¥ 13,000 521,270 ¥ 13,000 581,948 Forwards US Dollar-Mexican peso US$ 1,744 1,600,666 — — Forwards US Dollar-Brazilian US$ 100 44,280 US$ 150 126,287 Swaps Swiss Franc-US CHF 475 178,710 — — Swaps Euro-Brazilian € 450 359,671 € 300 1,080,552 Interest rate swap Ps.200 916 — — Forwards Brazilian Real-US Dollar — — BRL $ 2,823 1,107,630 Forwards Euro-Brazilian € 400 330,427 € 150 123,005 Forwards US Dollar-Swiss franc CHF 75 121,981 — — Forwards Euro-US € 204 113,361 € 710 209,295 Total Assets Ps. 8,037,384 Ps. 5,287,548 At December 31, 2017 2018 Instrument Notional amount in Fair Value Notional amount in Fair Value Liabilities: Swaps US Dollar-Euro US$ 2,092 Ps. (8,340,970) US$ 2,025 Ps. (5,114,863) Swaps Pound sterling-Euro £ 740 (3,376,091) £ 740 (4,027,312) Swap Pound sterling-US £ 2,010 (1,676,636) £ 2,010 (5,836,607) Forwards US Dollar-Mexican Peso — — US$ 977 (772,704) Forwards Euro-US Dollar — — € 950 (333,586) Call spread option € 750 (48,422) — — Put option € 374 (482,645) € 374 (988,669) Call spread option € 3,000 (434,696) € 3,000 (33,838) Total Liabilities Ps. (14,359,460) Ps. (17,107,579) Non-current Ps. (3,756,921) Ps. (3,567,863) Total current liability Ps. (10,602,539) Ps. (13,539,716)
Summary of Maturities of Notional Amount of Derivatives	The maturities of the notional amount of the derivatives are as follows: Instrument Notional 2019 2020 2021 2022 2023 Thereafter Assets Swaps US Dollar-Mexican peso US$ — — — 1,600 1,890 Swaps Yen-US ¥ — — — — 13,000 Swaps Euro-Brazilian € 300 — — — — Forwards Brazilian Real-US Dollar BRL 1,680 — 1,143 — — Forwards Euro-Brazilian Real € 150 — — — — Forwards US Dollar-Brazilian Real US$ 150 — — — — Forwards Euro-US Dollar € 710 — — — — Liabilities Swaps US Dollar-Euro US$ 25 — — — 2,000 Swaps Pound sterling-Euro £ — — — — 740 Swap Pound sterling-US £ — 550 — — 1,460 Forwards US Dollar-Mexican Peso US$ 977 — — — — Forwards Euro-US Dollar € 950 — — — — Put option € — — — — 374 Call spread option € — 3,000 — — —

Inventories, net (Tables)

Inventories, net (Tables)	12 Months Ended
	Dec. 31, 2018
Text block [abstract]
Summary of Analysis of Inventories	An analysis of inventories at December 31, 2017 and 2018 is as follows: 2017 2018 Mobile phones, accessories, computers, TVs, cards and other materials Ps. 42,262,511 Ps. 43,723,492 Less: Reserve for obsolete and slow-moving inventories (3,452,946 ) (3,418,130 ) Total Ps. 38,809,565 Ps. 40,305,362

Other assets, net (Tables)

Other assets, net (Tables)	12 Months Ended
	Dec. 31, 2018
Text block [abstract]
Summary of Analysis of Other Assets	An analysis of other assets at December 31, 2017 and 2018 is as follows: 2017 2018 Current portion: Advances to suppliers (different from PP&E and inventories) Ps. 9,536,654 Ps. 12,931,247 Prepaid insurance 683,091 949,590 Costs of mobile equipment and computers associated with deferred revenues 6,182,010 599,628 Other 950,991 815,728 Ps. 17,352,746 Ps.15,296,193 Non-current Recoverable taxes Ps. 12,249,372 Ps. 11,514,455 Prepayments for the use of fiber optics 4,361,668 3,985,216 Prepaid expenses and judicial deposits (1) 25,926,436 26,961,930 Total Ps. 42,537,476 Ps. 42,461,601

Property, Plant and Equipment_2

Property, Plant and Equipment, Net (Tables)	12 Months Ended
	Dec. 31, 2018
Statement [LineItems]
Schedule of Property, Plant and Equipment, Net	a) At December 31, Additions Retirements Business Translation Depreciation At December 31, Cost Network in operation and equipment Ps. 641,384,702 Ps. 101,794,197 Ps. (8,963,076 ) Ps. 1,873,445 Ps. 235,186,745 Ps. — Ps. 971,276,013 Land and buildings 54,794,386 2,900,511 (2,845,298 ) 3,839 7,281,973 — 62,135,411 Other assets 106,468,602 24,368,918 (10,717,096 ) 69,937 24,736,655 — 144,927,016 Construction in process and advances plant suppliers (1) 38,850,776 70,517,319 (70,911,593 ) 11,255 11,252,127 — 49,719,884 Spare parts for operation of the network 20,342,389 34,010,751 (27,641,919 ) 5,520 1,566,307 — 28,283,048 Total 861,840,855 233,591,696 (121,078,982 ) 1,963,996 280,023,807 — 1,256,341,372 Accumulated depreciation Network in operation and equipment 236,731,728 — (1,968,376 ) — 153,147,349 107,976,385 495,887,086 Buildings 4,567,588 — (975,284 ) — 3,709,952 3,179,066 10,481,322 Other assets 47,057,084 — (25,099,710 ) — 10,396,438 16,105,885 48,459,697 Spare parts for operation of the network (44,423 ) — (54,280 ) — 20,896 401,008 323,201 Total Ps. 288,311,977 Ps. — Ps. (28,097,650 ) Ps. — Ps. 167,274,635 Ps. 127,662,344 Ps. 555,151,306 Net Cost Ps. 573,528,878 Ps. 233,591,696 Ps. (92,981,332 ) Ps. 1,963,996 Ps. 112,749,172 Ps. (127,662,344 ) Ps. 701,190,066 At December 31, 2016 Additions Retirements Business Effect of Depreciation for the year At December 31, 2017 Cost Network in operation and equipment Ps. 971,276,013 Ps. 78,272,882 Ps. (21,657,715 ) Ps. 599,306 Ps.(38,824,540 ) Ps. — Ps. 989,665,946 Land and buildings 62,135,411 2,858,996 (415,219 ) 27,686 (2,022,685 ) — 62,584,189 Other assets 144,927,016 19,287,525 (8,112,571 ) 80,734 (5,866,897 ) — 150,315,807 Construction in process and advances plant suppliers (1) 49,719,884 66,383,381 (41,279,573 ) 34,705 (737,023 ) — 74,121,374 Spare parts for operation of the network 28,283,048 27,013,148 (27,979,816 ) 3,576 (728,358 ) — 26,591,598 Total 1,256,341,372 193,815,932 (99,444,894 ) 746,007 (48,179,503 ) — 1,303,278,914 Accumulated depreciation Network in operation and equipment 495,887,086 — (21,214,724 ) — (32,860,339 ) 110,533,486 552,345,509 Buildings 10,481,322 — (1,568,542 ) — (940,054 ) 2,682,559 10,655,285 Other assets 48,459,697 — (4,572,509 ) — (2,251,958 ) 21,724,299 63,359,529 Spare parts for operation of the network 323,201 — (9,205 ) — (4,339 ) 265,736 575,393 Total Ps. 555,151,306 Ps. — Ps. (27,364,980 ) Ps. — Ps.(36,056,690 ) Ps. 135,206,080 Ps. 626,935,716 Net Cost Ps. 701,190,066 Ps. 193,815,932 Ps. (72,079,914 ) Ps. 746,007 Ps. (12,122,813 ) Ps. (135,206,080 ) Ps. 676,343,198 At December 31, 2017 Additions Retirements Business Effect of foreign Depreciation for the year At December 31, 2018 Cost Network in operation and equipment Ps. 989,665,946 Ps. 68,900,443 Ps. (1,610,246 ) Ps. 128,246 Ps. (87,888,453 ) — Ps. 969,195,936 Land and buildings 62,584,189 4,429,433 (3,987,671 ) 8,874 (5,904,499 ) — 57,130,326 Other assets 150,315,807 25,268,252 (13,377,798 ) 2,578 (12,399,702 ) — 149,809,137 Construction in process and advances plant suppliers (1) 74,121,374 92,285,397 (76,978,798 ) 1,379 (8,336,823 ) — 81,092,529 Spare parts for operation of the network 26,591,598 49,380,349 (44,626,488 ) 1,939 (2,902,869 ) — 28,444,529 Total 1,303,278,914 240,263,874 (140,581,001 ) 143,016 (117,432,346 ) — 1,285,672,457 Accumulated depreciation Network in operation and equipment 552,345,509 — (28,712,096 ) — (67,907,227 ) 104,279,361 560,005,547 Buildings 10,655,285 — (2,311,442 ) — (2,157,996 ) 2,625,102 8,810,949 Other assets 63,359,529 — (2,418,837 ) — (6,579,983 ) 22,172,785 76,533,494 Spare parts for operation of the network 575,393 — (160,696 ) — (131,429 ) 38,479 321,747 Total Ps. 626,935,716 Ps. — Ps. (33,603,071 ) Ps. — Ps. (76,776,635 ) Ps. 129,115,727 Ps. 645,671,737 Net Cost Ps. 676,343,198 Ps.240,263,874 Ps. (106,977,930 ) Ps. 143,016 Ps. (40,655,711 ) Ps. (129,115,727 ) Ps. 640,000,720 (1) Construction in progress includes fixed and mobile network facilities as well as satellite developments and fiber optic which is in the process of being installed.
Schedule of Relevant Information Related to Computation of Capitalized Borrowing Costs	d) Relevant information related to the computation of the capitalized borrowing costs is as follows: Year ended December 31, 2016 2017 2018 Amount invested in the acquisition of qualifying assets Ps. 52,974,400 Ps. 49,642,370 Ps. 45,456,630 Capitalized interest 2,861,307 2,875,034 2,020,288 Capitalization rate 5.4% 5.8% 4.4%
Property, plant and equipment under capital leases [member]
Statement [LineItems]
Schedule of Property, Plant and Equipment, Net	b) At December 31, 2017 and 2018, property, plant and equipment include the following assets under capital leases: 2017 2018 Assets under capital leases Ps. 8,116,532 Ps.7,770,681 Accumulated depreciation (3,475,014 ) (3,530,241 ) Ps. 4,641,518 Ps. 4,240,440

Intangible assets, net and go_2

Intangible assets, net and goodwill (Tables)	12 Months Ended
	Dec. 31, 2018
Text block [abstract]
Summary of Analysis of Intangible Assets	An analysis of intangible assets at December 31, 2016, 2017 and 2018 is as follows: For the year ended December 31, 2016 Balance at Acquisitions Acquisitions Disposals and Amortization Effect of Balance at end Licenses and rights of use Ps. 175,295,775 Ps. 9,129,949 Ps. 360,144 Ps. 1,269,478 Ps. — Ps. 56,684,016 Ps. 242,739,362 Accumulated amortization (84,846,524 ) — — — (10,255,271 ) (31,606,303 ) (126,708,098 ) Net 90,449,251 9,129,949 360,144 1,269,478 (10,255,271 ) 25,077,713 116,031,264 Trademarks 22,824,013 — 101,655 (13,820 ) — 4,877,302 27,789,150 Accumulated amortization (11,523,707 ) — — — (330,576 ) (3,367,974 ) (15,222,257 ) Net 11,300,306 — 101,655 (13,820 ) (330,576 ) 1,509,328 12,566,893 Customer relationships 18,394,407 — 1,904,503 — — 5,946,598 26,245,508 Accumulated amortization (3,962,875 ) — — — (3,231,518 ) (5,240,681 ) (12,435,074 ) Net 14,431,532 — 1,904,503 — (3,231,518 ) 705,917 13,810,434 Software licenses 8,782,768 3,854,066 26,871 (829,680 ) — 1,040,771 12,874,796 Accumulated amortization (2,424,598 ) (41,185 ) (8,367 ) 829,680 (3,469,461 ) (9,809 ) (5,123,740 ) Net 6,358,170 3,812,881 18,504 — (3,469,461 ) 1,030,962 7,751,056 Content rights 2,634,527 2,242,556 — (217,057 ) — 216,272 4,876,298 Accumulated amortization (428,746 ) — — (1,612 ) (2,236,141 ) — (2,666,499 ) Net 2,205,781 2,242,556 — (218,669 ) (2,236,141 ) 216,272 2,209,799 Total of intangibles, net Ps. 124,745,040 Ps. 15,185,386 Ps. 2,384,806 Ps. 1,036,989 Ps. (19,522,967 ) Ps. 28,540,192 Ps. 152,369,446 Goodwill (Note 12) Ps. 137,113,716 Ps. — Ps. 3,953,023 Ps. (356,832 ) Ps. — Ps. 11,922,728 Ps. 152,632,635 For the year ended December 31, 2017 Balance at Acquisitions Acquisitions Disposals and Amortization Effect of Balance at end of year Licenses and rights of use Ps. 242,739,362 Ps. 12,347,051 Ps. 53,923 Ps. (1,037,458 ) Ps. — Ps. (6,689,054 ) Ps. 247,413,824 Accumulated amortization (126,708,098 ) — — 244,564 (11,879,489 ) 4,233,585 (134,109,438 ) Net 116,031,264 12,347,051 53,923 (792,894 ) (11,879,489 ) (2,455,469 ) 113,304,386 Trademarks 27,789,150 127,823 82,868 (29,804 ) — 809,175 28,779,212 Accumulated amortization (15,222,257 ) — — 34,464 (3,179,461 ) (474,151 ) (18,841,405 ) Net 12,566,893 127,823 82,868 4,660 (3,179,461 ) 335,024 9,937,807 Customer relationships 26,245,508 — 512,667 (882,338 ) — 1,109,877 26,985,714 Accumulated amortization (12,435,074 ) — — 882,338 (3,769,777 ) (806,982 ) (16,129,495 ) Net 13,810,434 — 512,667 — (3,769,777 ) 302,895 10,856,219 Software licenses 12,874,796 3,351,200 — (1,698,118 ) — 527,720 15,055,598 Accumulated amortization (5,123,740 ) — — 1,212,669 (3,699,363 ) (204,727 ) (7,815,161 ) Net 7,751,056 3,351,200 — (485,449 ) (3,699,363 ) 322,993 7,240,437 Content rights 4,876,298 2,099,084 — (63,137 ) — (194,803 ) 6,717,442 Accumulated amortization (2,666,499 ) — — (195,658 ) (1,820,092 ) 165,584 (4,516,665 ) Net 2,209,799 2,099,084 — (258,795 ) (1,820,092 ) (29,219 ) 2,200,777 Total of intangibles, net Ps. 152,369,446 Ps. 17,925,158 Ps. 649,458 Ps. (1,532,478 ) Ps. (24,348,182 ) Ps. (1,523,776 ) Ps. 143,539,626 Goodwill (Note 12) Ps. 152,632,635 Ps. — Ps. 951,348 Ps. (134,525 ) Ps. — Ps. (1,986,226 ) Ps. 151,463,232 For the year ended December 31, 2018 Balance at Acquisitions Acquisitions Disposals and Amortization Effect of and Hyperinflation adjustment Balance at end of year Licenses and rights of use Ps. 247,413,824 Ps. 4,227,244 — Ps. 1,508,274 — Ps. (19,670,368 ) Ps. 233,478,974 Accumulated amortization (134,109,438 ) — — (1,005,877 ) (11,347,089 ) 16,281,825 (130,180,579 ) Net 113,304,386 4,227,244 502,397 (11,347,089 ) (3,388,543 ) 103,298,395 Trademarks 28,779,212 159,958 6,631 — (738,635 ) 28,207,166 Accumulated amortization (18,841,405 ) — — — (4,973,602 ) 275,046 (23,539,961 ) Net 9,937,807 159,958 6,631 — (4,973,602 ) (463,589 ) 4,667,205 Customer relationships 26,985,714 74,637 15,556 — (1,532,839 ) 25,543,068 Accumulated amortization (16,129,495 ) — (3,754,312 ) 1,122,270 (18,761,537 ) Net 10,856,219 74,637 15,556 — (3,754,312 ) (410,569 ) 6,781,531 Software licenses 15,055,598 2,004,550 3,006 (905,610 ) — (1,848,286 ) 14,309,258 Accumulated amortization (7,815,161 ) — 2,677,848 (3,491,629 ) 924,139 (7,704,803 ) Net 7,240,437 2,004,550 3,006 1,772,238 (3,491,629 ) (924,147 ) 6,604,455 Content rights 6,717,442 850,779 — — — (18,512 ) 7,549,709 Accumulated amortization (4,516,665 ) — — — (2,231,978 ) (14,949 ) (6,763,592 ) Net 2,200,777 850,779 — — (2,231,978 ) (33,461 ) 786,117 Total of intangibles, net Ps. 143,539,626 Ps. 7,317,168 Ps. 25,193 Ps. 2,274,635 Ps. (25,798,610 ) Ps. (5,220,309 ) Ps. 122,137,703 Goodwill Ps. 151,463,232 Ps. 1,455 Ps. 333,284 Ps. (1,094,861 ) — Ps. (5,136,613 ) Ps. 145,566,497
Summary of Aggregate Carrying Amount of Goodwill	The aggregate carrying amount of goodwill is allocated as follows: 2017 2018 Europe (7 countries) Ps. 53,143,542 Ps. 53,066,729 Brazil (Fixed, wireless and TV) 24,708,740 21,388,124 Puerto Rico 17,463,394 17,463,394 Dominican Republic 14,186,723 14,186,723 Colombia 13,981,033 12,770,381 México 9,852,912 9,856,601 Peru 3,958,110 3,086,981 Chile 2,834,134 2,576,214 El Salvador 2,510,577 2,510,577 Ecuador 2,155,385 2,155,385 Other countries 6,668,682 6,505,388 Ps. 151,463,232 Ps. 145,566,497

Business combinations, acquis_2

Business combinations, acquisitions, sale and non-controlling interest (Tables)	12 Months Ended
	Dec. 31, 2018
Text block [abstract]
Summary of Selected Financial Data From Statements of Financial Position	Selected financial data from the statements of financial position December 31, 2017 2018 Assets: Current assets Ps. 29,128,486 Ps. 29,854,542 Non-current 150,225,260 131,407,408 Total assets Ps. 179,353,746 Ps. 161,261,950 Liabilities and equity: Current liabilities Ps. 30,192,384 Ps. 36,822,034 Non-current 89,048,150 80,023,800 Total liabilities 119,240,534 116,845,834 Equity attributable to equity holders of the parent 25,808,318 22,621,625 Non-controlling (1) 34,304,894 21,794,491 Total equity Ps. 60,113,212 Ps. 44,416,116 Total liabilities and equity Ps. 179,353,746 Ps. 161,261,950 (1) In 2017 this amount includes Ps. 14,942,886 for the subordinated perpetual fixed rate bond (see Note 19).
Summary of Statements of Comprehensive Income	Summarized statements of comprehensive income For the year ended December 31, 2016 2017 2018 Operating revenues Ps. 85,185,177 Ps. 93,644,173 Ps. 100,716,444 Operating costs and expenses 81,590,233 86,920,692 95,984,880 Operating income Ps. 3,594,944 Ps. 6,723,481 Ps. 4,731,564 Net income Ps. 7,065,770 Ps. 5,656,132 Ps. 3,809,694 Total comprehensive income Ps. 8,450,837 Ps. 7,737,797 Ps. 5,047,838 Net income attributable to: Equity holders of the parent Ps. 3,241,556 Ps. 2,884,627 Ps. 1,942,944 Non-controlling 3,824,214 2,771,505 1,866,750 Ps. 7,065,770 Ps. 5,656,132 Ps. 3,809,694 Comprehensive income attributable to: Equity holders of the parent Ps. 4,311,801 Ps. 3,978,263 Ps. 2,574,397 Non-controlling 4,139,036 3,759,534 2,473,441 Ps. 8,450,837 Ps. 7,737,797 Ps. 5,047,838

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2018
Text block [abstract]
Summary of Composition of Income Tax Expense	The composition of income tax expense for the years ended December 31, 2016, 2017 and 2018 is as follows: 2016 2017 2018 In Mexico: Current year income tax Ps. 14,316,005 Ps. 16,568,274 Ps. 28,572,414 Deferred income tax (12,086,232 ) 2,582,287 (2,688,727 ) Foreign: Current year income tax 15,367,903 13,524,729 19,898,728 Deferred income tax (6,198,820 ) (7,733,779 ) 694,664 Ps. 11,398,856 Ps. 24,941,511 Ps. 46,477,079
Summary of Deferred Tax Related to Items Recognized in OCI	Deferred tax related to items recognized in OCI during the year: For the years ended December 31, 2016 2017 2018 Remeasurement of defined benefit plans Ps. (7,734,732 ) Ps. 3,032,403 Ps. 408,735 Effect of financial instruments acquired for hedging purposes (21,046 ) (5,337 ) Equity investments at fair value 2,858,452 (266,753 ) 1,613,667 Other 136,879 — (8,922 ) Deferred tax benefit (expense) recognized in OCI Ps. (4,760,447 ) Ps. 2,760,313 Ps. 2,013,480
Summary of Reconciliation of Statutory Income Tax Rate in Mexico to Consolidated Effective Income Tax Rate Recognized	A reconciliation of the statutory income tax rate in Mexico to the consolidated effective income tax rate recognized by the Company is as follows: Year ended December 31, 2016 2017 2018 Statutory income tax rate in Mexico 30.0% 30.0% 30.0% Impact of non-deductible non-taxable Tax inflation effects 15.9% 17.8% 7.3% Derivatives 8.0% 1.0% 0.4% Employee benefits 4.4% 2.2% 1.3% Other 9.8% 2.6% 6.3% Effective tax rate on Mexican operations 68.1% 53.6% 45.3% Use of unrecognized tax credits in Brazil (0.6% ) (0.4% ) — Equity interest in net loss of associated companies (0.2% ) — — Dividends received from associates (7.9% ) (1.2% ) (0.8% ) Foreign subsidiaries and other non-deductible (10.8% ) (8.3% ) 1.5% Effective tax rate 48.6% 43.7% 46.0%
Summary of Analysis of Temporary Differences Giving Rise to Net Deferred Tax Liability	An analysis of temporary differences giving rise to the net deferred tax liability is as follows: Consolidated statements of financial position Consolidated statements of comprehensive income 2017 2018 2016 2017 2018 Provisions Ps.26,268,666 Ps.20,781,421 Ps.1,622,132 Ps.1,579,604 Ps.1,841,705 Deferred revenues 7,461,802 6,866,120 (12,128 ) (965,010 ) 3,632,051 Tax losses carry forward 38,332,408 27,881,491 12,706,245 (323,506 ) (5,833,660 ) Property, plant and equipment (1) (9,929,129 ) (11,756,590 ) 2,445,783 1,974,753 453,493 Inventories 2,003,049 2,106,976 (229,571 ) 519,046 81,270 Licenses and rights of use (1) (2,455,877 ) (3,896,788 ) 54,182 348,201 961,402 Employee benefits 33,253,071 33,673,874 3,616,952 1,225,310 1,128,209 Other 9,639,995 10,956,823 (1,918,543 ) 793,094 (270,407 ) Net deferred tax assets Ps.104,573,985 Ps.86,613,327 Deferred tax expense in net profit for the year Ps.18,285,052 Ps.5,151,492 Ps.1,994,063 (1) As of December 31, 2018, the balance included the effects of hyperinflation.
Summary of Reconciliation of Deferred Tax Assets and Liabilities, Net	Reconciliation of deferred tax assets and liabilities, net: 2016 2017 2018 Opening balance as of January 1, Ps. 69,817,147 Ps. 98,589,818 Ps. 104,573,985 Deferred tax benefit 18,285,052 5,151,492 1,994,063 Translation effect 15,273,228 (1,687,276 ) (8,854,010 ) Deferred tax benefit (expense) recognized in OCI (4,760,447 ) 2,760,313 2,013,480 Deferred taxes acquired in business combinations (25,162 ) (240,362 ) (25,827 ) Hyperinflationary effect in Argentina — — (4,907,151 ) Effect of adoption of IFRS 9 (Note 2ai) — — 544,628 Effect of adoption of IFRS 15 (Note 2ai) — — (8,725,841 ) Closing balance as of December 31, Ps. 98,589,818 Ps. 104,573,985 Ps. 86,613,327 Presented in the consolidated statements of financial position as follows: Deferred income tax assets Ps. 112,651,699 Ps. 116,571,349 Ps. 111,186,768 Deferred income tax liabilities (14,061,881 ) (11,997,364 ) (24,573,441 ) Ps. 98,589,818 Ps. 104,573,985 Ps. 86,613,327
Summary of Combined Income before Taxes and Combined Provision for Taxes	The combined income before taxes and the combined provision for taxes of such subsidiaries in 2016, 2017 and 2018 are as follows: 2016 2017 2018 Combined income before taxes Ps. 45,697,258 Ps. 38,286,046 Ps. 66,314,883 Combined tax provision differences deducible-not Ps. 9,169,083 Ps. 5,790,950 Ps. 20,593,392
Available Tax Loss Carryforwards Recorded in Deferred Tax Assets	At December 31, 2018, the available tax loss carryforwards recorded in deferred tax assets are as follows on a country by country basis: Country Balance of available tax Tax loss carryforward Brazil Ps. 59,695,441 Ps. 20,296,450 Austria 20,128,833 5,032,208 Mexico 6,043,603 1,813,081 Colombia 2,239,486 739,030 Nicaragua 2,403 722 Total Ps. 88,109,766 Ps. 27,881,491

Debt (Tables)

Debt (Tables)	12 Months Ended
	Dec. 31, 2018
Text block [abstract]
Summary of Short- and Long-Term Debt	The Company’s short- and long-term debt consists of the following: At December 31, 2017 (Thousands of Currency Loan Interest rate Maturity Total Senior Notes U.S. dollars Fixed-rate Senior notes (i) 5.000% 2019 Ps. 14,840,025 Fixed-rate Senior notes (i) 5.500% 2019 7,467,145 Fixed-rate Senior notes (i) 5.000% 2020 42,043,077 Fixed-rate Senior notes (i) 3.125% 2022 31,658,720 Fixed-rate Senior notes (i) 6.375% 2035 19,417,282 Fixed-rate Senior notes (i) 6.125% 2037 7,305,744 Fixed-rate Senior notes (i) 6.125% 2040 39,573,400 Fixed-rate Senior notes (i) 4.375% 2042 22,754,705 Subtotal U.S. dollars Ps. 185,060,098 Mexican pesos Domestic Senior notes (i) 8.110% 2018 Ps. 1,750,000 Domestic Senior notes (i) 8.270% 2018 1,160,110 Domestic Senior notes (i) 8.600% 2020 7,000,000 Domestic Senior notes (i) 0.000% 2025 4,409,873 Domestic Senior notes (i) 8.360% 2037 5,000,000 Fixed-rate Senior notes (i) 6.000% 2019 10,000,000 Fixed-rate Senior notes (i) 6.450% 2022 22,500,000 Fixed-rate Senior notes (i) 7.125% 2024 11,000,000 Fixed-rate Senior notes (i) 8.460% 2036 7,871,700 Subtotal Mexican pesos Ps. 70,691,683 Euros Fixed-rate Senior notes (i) 1.000% 2018 Ps. 14,252,360 Fixed-rate Senior notes (i) 4.125% 2019 23,753,933 Exchangeable Bonds (i) 0.000% 2020 67,504,878 Fixed-rate Senior notes (i) 3.000% 2021 23,753,933 Fixed-rate Senior notes (i) 3.125% 2021 18,727,775 Fixed-rate Senior notes (i) 4.000% 2022 19,333,685 Fixed-rate Senior notes (i) 4.750% 2022 17,815,450 Fixed-rate Senior notes (i) 3.500% 2023 7,594,262 Fixed-rate Senior notes (i) 3.259% 2023 17,815,450 Fixed-rate Senior notes (i) 1.500% 2024 20,190,843 Fixed-rate Senior notes (i) 1.500% 2026 17,815,450 Fixed-rate Senior notes (i) 2.125% 2028 15,440,057 Subtotal Euros Ps. 263,998,076 Pounds sterling Fixed-rate Senior notes (i) 5.000% 2026 Ps. 13,368,884 Fixed-rate Senior notes (i) 5.750% 2030 17,379,549 Fixed-rate Senior notes (i) 4.948% 2033 8,021,330 Fixed-rate Senior notes (i) 4.375% 2041 20,053,326 Subtotal Pounds sterling Ps. 58,823,089 Swiss francs Fixed-rate Senior notes (i) 1.125% 2018 Ps. 11,169,748 Subtotal Swiss francs Ps. 11,169,748 Brazilian reais Debenture (i) 102.900% of CDI 2020 Ps. 8,972,204 Promissory Note (i) 102.400% of CDI 2019 5,981,469 Debenture (i) 103.900% of CDI 2019 5,981,469 Subtotal Brazilian reais Ps. 20,935,142 Other currencies Japanese yen Fixed-rate Senior notes (i) 2.950% 2039 Ps. 2,282,608 Subtotal Japanese yen Ps. 2,282,608 Chilean pesos Fixed-rate Senior notes (i) 3.961% 2035 Ps. 4,312,424 Subtotal Chilean pesos Ps. 4,312,424 Subtotal other currencies Ps. 6,595,032 Hybrid Notes Euros Euro NC5 Series A Capital Securities (iii) 5.125% 2073 Ps. 21,378,540 Euro NC10 Series B Capital Securities (iii) 6.375% 2073 13,064,663 Subtotal Euros Ps. 34,443,203 Pounds sterling GBP NC7 Capital Securities (iii) 6.375% 2073 Ps. 14,705,772 Subtotal Pounds sterling Ps. 14,705,772 Subtotal Hybrid Notes Ps. 49,148,975 Lines of Credit and others U.S. dollars Lines of credit (ii) L + 0.200% and 1.500% - 7.250% 2018 - 2019 Ps. 14,474,350 Mexican pesos Lines of credit (ii) TIIE + 0.040% - TIIE + 0.175% 2018 - 2019 Ps. 12,500,000 Brazilian reais Lines of credit (ii) 107% of CDI - TJLP + 3.500% & 3.000% - 9.500% 2018 -2027 Ps. 4,389,260 Chilean pesos Financial Leases 8.700% - 8.970% 2018 - 2027 Ps. 99,446 Subtotal Lines of Credit and others Ps. 31,463,056 Total debt Ps. 697,884,899 Less: Short-term debt and current portion of long-term debt Ps. 51,745,841 Long-term debt Ps. 646,139,058 At December 31, 2018 (Thousands of Currency Loan Interest rate Maturity Total Senior Notes U.S. dollars Fixed-rate Senior notes (i) 5.000% 2019 Ps. 14,762,175 Fixed-rate Senior notes (i) 5.500% 2019 7,427,972 Fixed-rate Senior notes (i) 5.000% 2020 41,822,521 Fixed-rate Senior notes (i) 3.125% 2022 31,492,640 Fixed-rate Senior notes (i) 6.375% 2035 19,315,420 Fixed-rate Senior notes (i) 6.125% 2037 7,267,419 Fixed-rate Senior notes (i) 6.125% 2040 39,365,800 Fixed-rate Senior notes (i) 4.375% 2042 22,635,335 Subtotal U.S. dollars Ps. 184,089,282 Mexican pesos Fixed-rate Senior notes (i) 6.000% 2019 Ps. 10,000,000 Domestic Senior notes (i) 8.600% 2020 7,000,000 Fixed-rate Senior notes (i) 6.450% 2022 22,500,000 Fixed-rate Senior notes (i) 7.125% 2024 11,000,000 Domestic Senior notes (i) 0.000% 2025 4,629,425 Fixed-rate Senior notes (i) 8.460% 2036 7,871,700 Domestic Senior notes (i) 8.360% 2037 5,000,000 Subtotal Mexican pesos Ps. 68,001,125 Euros Fixed-rate Senior notes (i) 4.125% 2019 Ps. 22,558,572 Exchangeable Bonds (i) 0.000% 2020 64,107,851 Fixed-rate Senior notes (i) 3.000% 2021 22,558,572 Fixed-rate Senior notes (i) 3.125% 2021 17,568,739 Fixed-rate Senior notes (i) 4.000% 2022 18,028,031 Fixed-rate Senior notes (i) 4.750% 2022 16,918,929 Fixed-rate Senior notes (i) 3.500% 2023 7,132,481 Fixed-rate Senior notes (i) 3.259% 2023 16,918,929 Fixed-rate Senior notes (i) 1.500% 2024 19,174,786 Fixed-rate Senior notes (i) 1.500% 2026 16,918,929 Fixed-rate Senior notes (i) 2.125% 2028 14,663,072 Subtotal Euros Ps. 236,548,891 Pounds sterling Fixed-rate Senior notes (i) 5.000% 2026 Ps. 12,550,801 Fixed-rate Senior notes (i) 5.750% 2030 16,316,042 Fixed-rate Senior notes (i) 4.948% 2033 7,530,481 Fixed-rate Senior notes (i) 4.375% 2041 18,826,202 Subtotal Pounds sterling Ps. 55,223,526 Brazilian reais Debenture (i) 103.900% of CDI 2019 Ps. 5,079,720 Promissory notes (i) 102.400% of CDI 2019 5,079,720 Promissory notes (i) 103.205% of CDI 2019 1,828,699 Debenture (i) 102.900% of CDI 2020 7,619,580 Debenture (i) 104.000% of CDI 2021 5,587,692 Debenture (i) 104.250% of CDI 2021 7,695,776 Subtotal Brazilian reais Ps. 32,891,187 Other currencies Japanese yen Fixed-rate Senior notes (i) 2.950% 2039 Ps. 2,334,864 Subtotal Japanese yen Ps. 2,334,864 Chilean pesos Fixed-rate Senior notes (i) 3.961% 2035 Ps. 3,904,707 Subtotal Chilean pesos Ps. 3,904,707 Subtotal other currencies Ps. 6,239,571 Hybrid Notes Euros Euro NC10 Series B Capital Securities (iii) 6.375% 2073 Ps. 12,407,214 Subtotal Euros Ps. 12,407,214 Pounds sterling GBP NC7 Capital Securities (iii) 6.375% 2073 Ps. 13,805,881 Subtotal Pounds sterling Ps. 13,805,881 Subtotal Hybrid Notes 26,213,095 Lines of Credit and others U.S. dollars Lines of credit (ii) L + 0.200% and 1.500% - 8.950% 2019 - 2021 Ps. 11,698,885 Mexican pesos Lines of credit (ii) TIIE + 0.175% 2019 Ps. 4,500,000 Euros Lines of credit (ii) -0.100% - 0.000% 2019 Ps. 5,526,850 Brazilian reais Lines of credit (ii) 5.000% - 6.000% 2019 - 2027 Ps. 27,009 Peruvian Soles Lines of credit (ii) 4.700% - 12.100% 2019 Ps. 7,898,595 Chilean pesos Financial Leases 8.700% - 8.970% 2019 - 2027 Ps. 64,437 Subtotal Lines of Credit and others Ps. 29,715,776 Total debt Ps. 638,922,453 Less: Short-term debt and current portion of long-term debt Ps. 96,230,634 Long-term debt Ps. 542,691,819
Summary of Short Term Debt Maturities	An analysis of the Company’s short-term debt maturities as of December 31, 2017, and December 31, 2018, is as follows: 2017 2018 Obligations and Senior Notes Ps. 28,994,496 Ps. 67,365,810 Lines of credit 22,714,383 28,852,364 Financial Leases 36,962 12,460 Total Ps. 51,745,841 Ps. 96,230,634 Weighted average interest rate 4.0% 5.20%
Summary of Long Term Debt Maturities	The Company’s long-term debt maturities as of December 31, 2018 are as follows: Years Amount 2020 Ps. 121,184,630 2021 54,189,122 2022 88,027,828 2023 and thereafter 279,290,239 Total Ps. 542,691,819
Summary of Senior Notes Outstanding	The outstanding Senior Notes at December 31, 2017, and December 31, 2018, are as follows: Currency* 2017 2018 U.S. dollars Ps. 185,060,098 Ps. 184,089,282 Mexican pesos 70,691,683 68,001,125 Euros** 263,998,076 236,548,891 Pounds sterling** 58,823,089 55,223,526 Swiss francs 11,169,748 — Brazilian reais 20,935,142 32,891,187 Japanese yens 2,282,608 2,334,864 Chilean pesos 4,312,424 3,904,707 * Thousands of Mexican pesos ** Includes secured and unsecured senior notes.

Accounts payable, accrued lia_2

Accounts payable, accrued liabilities and asset retirement obligations (Tables)	12 Months Ended
	Dec. 31, 2018
Text block [abstract]
Components Accounts Payable and Accrued Liabilities	The components of the caption accounts payable and accrued liabilities are as follows: At December 31, 2017 2018 Suppliers Ps. 106,483,848 Ps. 118,406,380 Sundry creditors 91,842,929 91,087,197 Interest payable 8,930,561 8,535,519 Guarantee deposits from customers 1,460,286 1,421,336 Dividends payable 3,955,783 2,506,835 Total Ps. 212,673,407 Ps. 221,957,267
Summary of Balance of Accrued Liabilities	The balance of accrued liabilities at December 31, 2017 and 2018 are as follows: At December 31, 2017 2018 Current liabilities Direct employee benefits payable Ps. 16,673,627 Ps. 16,152,118 Contingencies 51,079,131 40,281,573 Total Ps. 67,752,758 Ps. 56,433,691
Summary of Movements in Contingent Liabilities	The movements in contingencies for the years ended December 31, 2017 and 2018 are as follows: Balance at December 31, Business Effect of Increase of Applications Balance at December 31, Payments Reversals Contingencies Ps. 50,766,070 Ps. 115,971 Ps. (648,685) Ps. 10,510,473 Ps. (7,618,520) Ps. (2,046,178) Ps. 51,079,131 Balance at December 31, Business Effect of Increase of Applications Balance at December 31, Payments Reversals Contingencies Ps. 51,079,131 Ps. 7,812 Ps. (5,729,826) Ps. 15,683,252 Ps. (6,203,329) Ps. (14,555,467) Ps. 40,281,573
Summary of Movements in Asset Retirement Obligations	The movements in the asset retirement obligations for the years ended December 31, 2017 and 2018 are as follows: Balance at 2016 Effect of Increase of the year Applications Balance at 2017 Payments Reversals Asset retirement obligations Ps. 16,288,631 Ps. (119,928) Ps. 3,160,320 Ps. (126,088) Ps. (957,806) Ps. 18,245,129 Balance at Effect of Increase of Applications Balance at Payments Reversals Asset retirement obligations Ps. 18,245,129 Ps. (2,020,853) Ps. 1,062,745 Ps. (151,364) Ps. (1,164,056) Ps. 15,971,601

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2018
Text block [abstract]
Schedule of Non-Cancelable Commitments under Finance and Operating Leases	The Company has the following non-cancelable Year ended December 31, 2019 Ps. 22,920 2020 13,365 2021 12,068 2022 10,751 2023 9,399 2024 and thereafter 34,011 Total Ps. 102,514 Less: amounts representing finance charges 23,837 Present value of net minimum lease payments 78,677 Less current portion 14,240 Long-term obligations Ps. 64,437 An analysis of non-cancellable Year ended December 31, 2019 Ps. 24,034,366 2020 22,104,366 2021 15,522,020 2022 14,250,332 2023 12,046,800 2024 and thereafter 49,991,937 Total Ps. 137,949,821
Purchase Commitments	As of December 31, 2018, the total amounts equivalent to the contract period are detailed below: Year ended December 31, 2019 Ps. 88,233,626 2020 68,170,083 2021 55,358,156 2022 13,322,961 Total Ps. 225,084,826

Employee Benefits (Tables)

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 Net employee DBO Plan Assets Effect of asset Net employee 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 Net employee 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 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 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 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 Brazil Mexico Europe Puerto Brazil Mexico Europe Puerto 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, Applications Balance at December 31, Effect of Increase of 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, Applications Balance at December 31, Effect of Increase of 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

Financial Assets and Liabilit_2

Financial Assets and Liabilities (Tables)	12 Months Ended
	Dec. 31, 2018
Text block [abstract]
Summary of Categorization of the Financial Instruments, Excluding Cash and Cash Equivalents	Set out below is the categorization of the financial instruments, excluding cash and cash equivalents, held by the Company as of December 31, 2017 and 2018: December 31, 2017 Loans and Fair value Fair value Financial Assets: Equity investments at fair value through OCI and other short term investments Ps. 12,438,019 Ps. — Ps. 46,682,657 Accounts receivable from subscribers, distributors, contractual assets and other 163,085,537 — — Related parties 868,230 — — Derivative financial instruments — 8,037,384 — Total Ps. 176,391,786 Ps. 8,037,384 Ps. 46,682,657 Financial Liabilities: Debt Ps. 697,884,899 Ps. — Ps. — Accounts payable 212,673,407 — — Related parties 2,540,412 — — Derivative financial instruments — 14,359,460 — Total Ps. 913,098,718 Ps. 14,359,460 Ps. —
Summary of Fair Value for the Financial Assets (Excluding Cash and Cash Equivalents) and Financial Liabilities	The fair value for the financial assets (excluding cash and cash equivalents) and financial liabilities shown in the consolidated statements of financial position at December 31, 2017 and 2018 is as follows: Measurement of fair value at December 31, 2017 Level 1 Level 2 Level 3 Total Assets: Equity investments at fair value through OCI and other short-term investments Ps. 46,682,657 Ps. 12,438,019 Ps. — Ps. 59,120,676 Derivative financial instruments — 8,037,384 — 8,037,384 Pension plan assets 218,518,358 9,039,270 130,976 227,688,604 Total Ps. 265,201,015 Ps. 29,514,673 Ps. 130,976 Ps. 294,846,664 Liabilities: Debt Ps. 691,769,785 Ps. 63,147,153 Ps. — Ps. 754,916,938 Derivative financial instruments — 14,359,460 — 14,359,460 Total Ps. 691,769,785 Ps. 77,506,613 Ps. — Ps. 769,276,398 Measurement of fair value at December 31, 2018 Level 1 Level 2 Level 3 Total Assets: Equity investments at fair value through OCI and other short-term investments Ps. 39,028,083 Ps. 9,987,851 Ps. — Ps. 49,015,934 Derivative financial instruments — 5,287,548 — 5,287,548 Pension plan assets 186,557,731 17,096,344 17,047 203,671,122 Total Ps. 225,585,814 Ps. 32,371,743 Ps. 17,047 Ps. 257,974,604 Liabilities: Debt Ps. 594,713,342 Ps. 99,723,251 Ps. — Ps. 694,436,593 Derivative financial instruments 17,107,579 — 17,107,579 Total Ps. 594,713,342 Ps. 116,830,830 Ps. — Ps. 711,544,172
Summary of Changes in Liabilities Arising From Financing Activities	Changes in liabilities arising from financing activities At January 1, Cash flow Foreign currency At December 31, Total liabilities from financing activities Ps. 707,801,403 Ps. (27,433,489 ) Ps. 17,516,985 Ps. 697,884,899 At January 1, Cash flow Foreign currency At December 31, Total liabilities from financing activities Ps. 697,884,899 Ps. (34,050,923 ) Ps. (24,911,523 ) Ps. 638,922,453

Shareholders' Equity (Tables)

Shareholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2018
Text block [abstract]
Summary of Computation of The Basic and Diluted Earnings	The following table shows the computation of the basic and diluted earnings per share: For the years ended December 31, 2016 2017 2018 Net profit for the period attributable Ps. 8,649,427 Ps. 29,325,921 Ps. 52,566,197 Weighted average shares (in millions) 65,693 65,909 66,055 Earnings per share attributable to 0.13 0.44 0.79

Components of other comprehen_2

Components of other comprehensive (loss) income (Tables)	12 Months Ended
	Dec. 31, 2018
Text block [abstract]
Summary of Movement on the Components of the Other Comprehensive (Loss) Income	The movement on the components of the other comprehensive (loss) income for the years ended December 31, 2016, 2017 and 2018 is as follows: For the years ended December 31, 2016 2017 2018 Controlling interest: Valuation of the derivative financial instruments, net of deferred taxes Ps. 48,496 Ps. 12,292 Ps. — Unrealized (loss) gain on equity investments at fair value, net of deferred taxes (6,673,731 ) 622,424 (3,765,688 ) Translation effect of foreign entities 104,178,880 (21,683,333 ) (61,223,458 ) Remeasurement of defined benefit plan, net of deferred taxes 14,771,770 (7,075,606 ) 652,722 Non-controlling 3,322,090 3,402,973 (2,986,018 ) Other comprehensive (loss) income Ps. 115,647,505 Ps. (24,721,250 ) Ps. (67,322,442 )

Valuation of derivatives, int_2

Valuation of derivatives, interest cost from labor obligations and other financial items, net (Tables)	12 Months Ended
	Dec. 31, 2018
Text block [abstract]
Schedule of Valuation of Derivatives and Other Financial Items	For the years ended December 31, 2016, 2017 and 2018, valuation of derivatives and other financial items are as follows: For the years ended December 31, 2016 2017 2018 Controlling interest: (Loss) gain in valuation of derivatives, net Ps. (9,622,233 ) Ps. 8,192,567 Ps. (4,686,407 ) Capitalized interest expense (Note 10 d) 2,861,307 2,875,034 2,020,288 Commissions (2,034,972 ) (1,263,701 ) (1,901,473 ) Interest cost of labor obligations (Note 17) (9,178,513 ) (8,722,611 ) (9,968,526 ) Interest expense on taxes (245,922 ) (1,503,981 ) (555,921 ) Dividend received (Note 4) 5,740,092 2,385,559 2,605,333 Gain on net monetary positions (Note 2i, c) — — 4,429,145 Other financial cost (3,745,600 ) (3,906,627 ) (2,118,755 ) Total Ps. (16,225,841 ) Ps. (1,943,760 ) Ps. (10,176,316 )

Segments (Tables)

Segments (Tables)	12 Months Ended
	Dec. 31, 2018
Text block [abstract]
Summary of Operating Segments	Mexico Telmex Brazil Southern Cone Colombia Andean Central U.S.A. Caribbean Europe Eliminations Consolidated At December 31 2016 (in Ps.): External revenues 187,127,903 93,343,612 193,796,237 71,553,356 67,330,768 55,825,972 42,131,666 140,856,365 36,467,781 86,978,828 — 975,412,488 Intersegment revenues 16,438,858 8,872,248 3,560,388 776,719 257,767 304,834 289,465 — 30,210 — (30,530,489 ) — Total revenues 203,566,761 102,215,860 197,356,625 72,330,075 67,588,535 56,130,806 42,421,131 140,856,365 36,497,991 86,978,828 (30,530,489 ) 975,412,488 Depreciation and amortization 16,451,496 17,150,013 47,170,935 9,739,634 11,283,749 7,764,474 10,474,681 1,073,623 5,225,498 22,525,050 (333,232 ) 148,525,921 Operating income 48,219,505 12,275,892 6,325,323 8,317,053 11,209,959 6,086,638 3,830,974 1,220,601 6,143,183 5,388,595 592,587 109,610,310 Interest income 28,659,372 303,915 3,747,684 2,649,539 104,304 944,945 462,779 239,797 691,132 286,784 (33,897,656 ) 4,192,595 Interest expense 32,004,944 1,135,552 22,970,335 5,049,457 1,079,989 1,147,380 411,597 — 143,322 2,953,033 (33,033,597 ) 33,862,012 Income tax 2,502,242 921,803 (4,294,040 ) 2,021,090 4,456,750 1,768,066 3,291,776 767,295 2,542,080 (2,578,206 ) — 11,398,856 Equity interest in net income 67,472 116,368 (270 ) (23,319 ) — — 171 — — 29,528 — 189,950 Net profit (loss) attributable to equity holders of the parent 378,150 902,282 (10,357,493 ) 3,765,015 4,022,633 3,621,863 538,890 987,790 3,318,960 7,065,769 (5,594,432 ) 8,649,427 Assets by segment 1,070,598,204 161,133,722 461,831,754 140,617,162 103,361,235 113,839,981 80,832,029 42,812,349 93,941,695 227,288,156 (981,214,013 ) 1,515,042,274 Plant, property and equipment, net 64,893,242 112,220,236 203,270,555 67,023,143 59,690,886 37,716,772 41,808,573 1,949,166 33,854,428 78,763,065 — 701,190,066 Goodwill 27,186,328 213,926 26,106,622 3,006,448 14,659,891 5,948,335 5,652,268 3,464,217 14,186,723 52,207,877 — 152,632,635 Trademarks, net 615,318 307,881 366,727 — 194 — — 788,228 284,665 10,203,880 — 12,566,893 Licenses and rights, net 5,887,092 42,867 41,496,209 8,760,860 4,603,793 12,882,210 3,993,120 — 7,694,798 30,670,315 — 116,031,264 Investment in associated companies 7,605,220 2,218,824 699 81,284 470 — 17,390 — — 1,072,778 (7,393,181 ) 3,603,484 Liabilities by segments 798,044,609 117,663,161 349,915,118 124,149,687 40,811,337 52,949,608 38,095,161 41,369,767 44,790,656 121,928,202 (485,698,799 ) 1,244,018,507 At December 31, 2017 (in Ps.): External revenues 190,022,612 89,731,238 210,536,673 81,092,885 72,435,460 56,393,595 44,094,835 148,589,487 35,092,578 93,644,172 — 1,021,633,535 Intersegment revenues 16,748,428 8,753,525 4,785,601 1,250,983 304,555 177,856 187,086 44 122,656 — (32,330,734 ) — Total revenues 206,771,040 98,484,763 215,322,274 82,343,868 72,740,015 56,571,451 44,281,921 148,589,531 35,215,234 93,644,172 (32,330,734 ) 1,021,633,535 Depreciation and amortization 17,030,251 18,902,238 51,486,652 10,639,591 12,373,790 8,328,705 9,668,439 1,594,727 5,349,757 25,222,962 (422,170 ) 160,174,942 Operating income (loss) 50,666,028 7,921,524 11,601,369 11,676,427 (4,704,165 ) 5,650,477 5,252,401 2,915,123 4,752,168 4,523,857 (111,906 ) 100,143,303 Interest income 30,083,437 619,748 3,792,242 2,884,613 211,521 1,793,974 1,064,992 394,196 1,111,980 307,021 (39,338,076 ) 2,925,648 Interest expense 32,185,868 1,028,593 23,578,083 4,637,989 1,955,688 1,573,929 485,684 — 377,727 2,035,716 (37,558,496 ) 30,300,781 Income tax 18,142,482 387,145 (2,991,377 ) 3,535,302 (1,874,594 ) 1,806,085 2,025,618 1,803,555 3,529,253 (1,417,358 ) (4,600 ) 24,941,511 Equity interest in net income (loss) of associated companies 99,044 16,564 (232 ) (9,801 ) — — — — — (14,190 ) — 91,385 Net profit (loss) attributable to equity holders of the parent 26,321,442 184,387 (6,617,381 ) 4,421,938 (6,209,530 ) 1,595,382 3,713,301 1,793,875 1,262,073 5,656,132 (2,795,698 ) 29,325,921 Assets by segment 1,033,036,406 170,402,561 428,281,963 133,136,177 108,362,023 113,478,626 81,529,691 40,761,830 88,672,466 203,858,243 (915,308,134 ) 1,486,211,852 Plant, property and equipment, net 59,137,555 109,713,770 187,459,628 69,006,093 57,060,931 35,930,966 39,050,481 1,693,642 32,173,524 85,116,608 — 676,343,198 Goodwill 27,102,384 213,926 24,708,739 3,073,444 13,981,033 6,113,495 5,597,990 3,341,956 14,186,723 53,143,542 — 151,463,232 Trademarks, net 406,723 274,786 246,557 — — — — 631,024 262,641 8,116,076 — 9,937,807 Licenses and rights, net 11,457,720 13,175 35,662,305 8,885,086 4,197,498 11,295,202 3,376,106 — 7,276,039 31,141,255 — 113,304,386 Investment in associated companies 469,662 546,872 640 63,110 451 — 16,999 — — 806,950 1,830,488 3,735,172 Liabilities by segments 794,598,013 133,428,178 322,620,030 119,123,646 54,756,152 48,656,628 35,501,900 38,249,957 43,978,410 119,240,533 (484,575,112 ) 1,225,578,335 At December 31, 2018 (in Ps.): External revenues 207,610,244 86,339,289 188,712,666 89,149,978 75,460,428 55,633,192 44,883,585 153,266,315 36,435,541 100,716,443 — 1,038,207,681 Intersegment revenues 16,946,543 9,741,908 4,593,760 13,200,358 344,517 154,082 149,445 — 204,294 — (45,334,907 ) — Total revenues 224,556,787 96,081,197 193,306,426 102,350,336 75,804,945 55,787,274 45,033,030 153,266,315 36,639,835 100,716,443 (45,334,907 ) 1,038,207,681 Depreciation and amortization 17,619,342 18,358,248 42,857,751 13,526,361 13,464,867 8,516,960 8,940,655 1,545,395 5,036,831 26,838,972 (992,802 ) 155,712,580 Operating income (loss) 57,450,599 8,085,764 23,494,903 16,975,797 14,388,552 5,003,915 4,867,763 2,665,270 5,811,846 4,731,562 (3,918,800 ) 139,557,171 Interest income 26,578,280 420,380 11,303,888 2,251,474 1,013,839 1,666,879 1,566,086 559,548 1,458,874 122,133 (36,295,212 ) 10,646,169 Interest expense 32,526,258 1,153,913 20,377,191 4,338,941 2,913,881 1,719,663 509,081 — 561,867 1,973,431 (34,302,793 ) 31,771,433 Income tax 28,842,505 643,377 4,026,444 1,390,039 2,251,877 2,498,666 2,533,600 810,898 2,774,204 707,093 (1,624 ) 46,477,079 Equity interest in net income (loss) of associated companies (5,962 ) 44,965 (152 ) (20,871 ) — — — — — (17,713 ) — 267 Net profit (loss) attributable to equity holders of the parent 23,185,029 (2,201,572 ) 3,530,653 6,065,703 9,165,801 1,730,933 2,821,733 2,820,505 3,644,697 3,809,694 (2,006,979 ) 52,566,197 Assets by segment 970,564,314 174,461,398 390,791,480 127,946,573 111,975,598 96,347,779 81,640,157 38,814,907 102,531,547 186,135,358 (851,985,719 ) 1,429,223,392 Plant, property and equipment, net 56,056,634 103,737,293 173,197,708 62,988,635 51,422,548 35,800,477 37,146,601 1,356,237 38,011,242 80,421,642 (138,297 ) 640,000,720 Goodwill 27,104,632 215,381 21,388,124 2,796,759 12,770,380 5,242,365 5,466,871 3,328,533 14,186,723 53,066,729 — 145,566,497 Trademarks, net 227,774 243,556 124,910 — — — — 507,033 249,984 3,313,948 — 4,667,205 Licenses and rights, net 10,573,147 — 25,873,910 12,555,496 3,400,235 9,651,582 3,605,416 — 10,294,336 27,344,273 — 103,298,395 Investment in associated companies 5,621,661 563,667 543 20,697 412 — 24,262 — — 748,674 (3,847,209 ) 3,132,707 Liabilities by segments 748,965,728 136,993,838 298,308,084 94,550,901 56,211,438 50,064,761 28,592,953 35,552,678 58,716,154 117,214,746 (441,820,311 ) 1,183,350,970

Supplemental Guarantor Inform_2

Supplemental Guarantor Information (Tables)	12 Months Ended
	Dec. 31, 2018
Text block [abstract]
Schedule of Consolidating Condensed Financial Information	The Company’s consolidating condensed financial information for the (i) Company; (ii) its wholly-owned guarantor subsidiary Telcel (on standalone basis), which is a wholly and unconditional guarantor under the Senior Notes; (iii) the combined non-guarantor Condensed consolidating statements of financial position As of December 31, 2017 Parent Wholly-owned Subsidiary Combined non-guarantor Eliminations Consolidated Assets: Cash and cash equivalents Ps. 7,018,559 Ps. 3,553,352 Ps. 13,698,562 Ps. — Ps. 24,270,473 Equity investments at fair value through OCI and other short-term investments 10,303,535 — 48,817,141 — 59,120,676 Accounts receivable and derivative financial instruments 9,874,652 24,064,936 167,873,940 — 201,813,528 Related parties 208,240,067 957,704 503,895,549 (712,225,090 ) 868,230 Inventories, net 264,649 16,700,837 21,844,079 — 38,809,565 Other current assets 17,805,747 922,245 (1,375,246 ) — 17,352,746 Property, plant and equipment, Net 1,996,721 24,287,904 650,058,573 — 676,343,198 Investments in associated companies 747,771,790 35,569,788 3,457,152 (783,063,558 ) 3,735,172 Intangible assets and other non- current assets, net 4,104,268 73,557,904 386,236,092 — 463,898,264 Total assets Ps. 1,007,379,988 Ps. 179,614,670 Ps. 1,794,505,842 Ps. (1,495,288,648 ) Ps. 1,486,211,852 Liabilities: Short-term debt and current portion of long-term debt Ps. 34,345,398 Ps. — Ps. 17,400,443 Ps. — Ps. 51,745,841 Current liabilities 161,940,198 41,304,845 797,880,314 (639,534,701 ) 361,590,656 Long-term debt 547,728,176 — 98,410,882 — 646,139,058 Other non-current 69,201,904 132,728,838 40,909,234 (76,737,196 ) 166,102,780 Total liabilities Ps. 813,215,676 Ps. 174,033,683 Ps. 954,600,873 Ps. (716,271,897 ) Ps. 1,225,578,335 Equity attributable to equity holders of the parent 194,164,312 5,580,987 741,988,231 (747,569,218 ) 194,164,312 Non-controlling — — 97,916,738 (31,447,533 ) 66,469,205 Total equity 194,164,312 5,580,987 839,904,969 (779,016,751 ) 260,633,517 Total liabilities and equity Ps. 1,007,379,988 Ps. 179,614,670 Ps. 1,794,505,842 Ps. (1,495,288,648 ) Ps. 1,486,211,852 Condensed consolidating statements of financial position As of December 31, 2018 Parent Wholly-owned Combined non-guarantor Eliminations Consolidated Assets: Cash and cash equivalents Ps. 8,335,101 Ps. 1,745,895 Ps. 11,578,966 Ps. — Ps. 21,659,962 Equity investments at fair value through OCI and other short-term investments 9,511,368 — 39,504,566 — 49,015,934 Accounts receivable and derivative financial instruments 31,462,176 35,671,582 154,380,710 — 221,514,468 Related parties 199,566,671 1,144,534 560,142,367 (759,589,967 ) 1,263,605 Inventories, net 215,055 18,495,502 21,594,805 — 40,305,362 Other current assets — 1,218,764 14,077,429 — 15,296,193 Property, plant and equipment, Net 1,340,358 23,192,546 615,467,816 — 640,000,720 Investments in associated companies 734,944,344 88,070,845 16,926,615 (836,809,097 ) 3,132,707 Intangible assets and other non- current assets, net 4,113,902 26,176,381 406,744,158 — 437,034,441 Total assets Ps. 989,488,975 Ps. 195,716,049 Ps. 1,840,417,432 Ps. (1,596,399,064 ) Ps. 1,429,223,392 Liabilities: Short-term debt and current portion of long-term debt Ps. 52,827,411 Ps. — Ps. 43,403,223 Ps. — Ps. 96,230,634 Current liabilities 153,489,868 72,282,238 597,174,025 (452,085,876 ) 370,860,255 Long-term debt 456,918,590 — 85,773,229 — 542,691,819 Other non-current 130,257,461 109,368,210 242,232,897 (308,290,306 ) 173,568,262 Total liabilities Ps. 793,493,330 Ps. 181,650,448 Ps. 968,583,374 Ps. (760,376,182 ) Ps. 1,183,350,970 Equity attributable to equity holders of the parent 195,995,645 14,065,601 760,485,332 (774,550,933 ) 195,995,645 Non-controlling — — 111,348,726 (61,471,949 ) 49,876,777 Total equity 195,995,645 14,065,601 871,834,058 (836,022,882 ) 245,872,422 Total liabilities and equity Ps. 989,488,975 Ps. 195,716,049 Ps. 1,840,417,432 Ps. (1,596,399,064 ) Ps. 1,429,223,392 Condensed consolidating statements of comprehensive income For the year ended December 31, 2016 Parent Wholly-owned Combined non-guarantor Eliminations Consolidated Total revenues Ps. 137,236,301 Ps. 173,714,225 Ps. 857,137,822 Ps. (192,675,860 ) Ps. 975,412,488 Total cost and operating expenses 117,835,634 160,949,691 778,483,079 (191,466,226 ) 865,802,178 Operating income 19,400,667 12,764,534 78,654,743 (1,209,634 ) 109,610,310 Interest (expense) income, net (12,331,095 ) 97,314 (17,207,855 ) (227,781 ) (29,669,417 ) Foreign currency exchange (loss) gain, net (46,625,392 ) (5,853,669 ) 12,051,654 — (40,427,407 ) Other financing cost, net (10,475,673 ) (11,203,533 ) 5,453,365 — (16,225,841 ) Income tax (7,712,179 ) 1,139,631 17,971,404 — 11,398,856 Equity interest in net income of associated companies 50,968,741 (1,342,073 ) (6,677,059 ) (42,759,659 ) 189,950 Net profit (loss) for year Ps. 8,649,427 Ps. (6,677,058 ) Ps. 54,303,444 Ps. (44,197,074 ) Ps. 12,078,739 Distribution of the net profit (loss) to: Equity owners of holding company 8,649,427 (6,677,058 ) 50,049,280 (43,372,222 ) 8,649,427 Non-controlling — — 4,254,164 (824,852 ) 3,429,312 Net profit (loss) Ps. 8,649,427 Ps. (6,677,058 ) Ps. 54,303,444 Ps. (44,197,074 ) Ps. 12,078,739 Other comprehensive income items: Net other comprehensive income (loss) to be reclassified to profit or loss in subsequent years: Effect of translation of foreign entities 104,178,880 755,978 108,291,984 (105,728,134 ) 107,498,708 Effect of fair value of derivatives, net of deferred taxes 48,496 — 30,206 (29,573 ) 49,129 Items not to be reclassified to profit or loss in subsequent years: Remeasurement of defined benefit plan, net of income tax effect 14,771,770 (12,300 ) 7,477,926 (7,463,997 ) 14,773,399 Equity investments at fair value (6,673,731 ) — (6,673,731 ) 6,673,731 (6,673,731 ) Total other comprehensive income items for the period Ps. 112,325,415 Ps. 743,678 Ps. 109,126,385 Ps. (106,547,973 ) Ps. 115,647,505 Total comprehensive income for the period Ps. 120,974,842 Ps. (5,933,380 ) Ps. 163,429,829 Ps. (150,745,047 ) Ps. 127,726,244 Comprehensive income for the period attributable to: Equity holders of the parent Ps. 120,974,842 Ps. (5,933,380 ) Ps. 150,900,984 Ps. (144,967,604 ) Ps. 120,974,842 Non-controlling — — 12,528,845 (5,777,443 ) 6,751,402 Ps. 120,974,842 Ps. (5,933,380 ) Ps. 163,429,829 Ps. (150,745,047 ) Ps. 127,726,244 Condensed consolidating statements of comprehensive income For the year ended December 31, 2017 Parent Wholly-owned Combined non-guarantor Eliminations Consolidated Total revenues Ps. 160,057,511 Ps. 170,991,493 Ps. 887,951,615 Ps. (197,367,084 ) Ps. 1,021,633,535 Total cost and operating expenses 123,548,341 163,152,868 832,429,198 (197,640,175 ) 921,490,232 Operating income 36,509,170 7,838,625 55,522,417 273,091 100,143,303 Interest (expense) income, net (16,779,235 ) (12,365,116 ) 1,810,523 (41,305 ) (27,375,133 ) Foreign currency exchange (loss) gain, net (15,223,111 ) 1,320,667 83,493 — (13,818,951 ) Other financing cost, net 6,775,455 — (8,719,215 ) — (1,943,760 ) Income tax 14,201,399 1,386,519 9,353,593 — 24,941,511 Equity interest in net income of associated companies 32,245,041 (8,977,146 ) (13,466,845 ) (9,709,665 ) 91,385 Net profit (loss) for year Ps. 29,325,921 Ps. (13,569,489 ) Ps. 25,876,780 Ps. (9,477,879 ) Ps. 32,155,333 Distribution of the net profit (loss) to: Equity owners of holding company 29,325,921 (13,569,489 ) 21,417,549 (7,848,060 ) 29,325,921 Non-controlling — — 4,459,231 (1,629,819 ) 2,829,412 Net profit (loss) Ps. 29,325,921 Ps. (13,569,489 ) Ps. 25,876,780 Ps. (9,477,879 ) Ps. 32,155,333 Other comprehensive income items: Net other comprehensive income (loss) to be reclassified to profit or loss in subsequent years: Effect of translation of foreign entities (21,683,333 ) (1,897,936 ) (18,309,877 ) 23,581,269 (18,309,877 ) Effect of fair value of derivatives, net of deferred taxes 12,292 — 12,292 (12,292 ) 12,292 Items not to be reclassified to profit or loss in subsequent years: Remeasurement of defined benefit plan, net of income tax effect (7,075,606 ) (8,439 ) (7,046,089 ) 7,084,045 (7,046,089 ) Equity investments at fair value 622,424 — 622,424 (622,424 ) 622,424 Total other comprehensive income items for the period Ps. (28,124,223 ) Ps. (1,906,375 ) Ps. (24,721,250 ) Ps. 30,030,598 Ps. (24,721,250 ) Total comprehensive income for the period Ps. 1,201,698 Ps. (15,475,864 ) Ps. 1,155,530 Ps. 20,552,719 Ps. 7,434,083 Comprehensive income for the period attributable to: Equity holders of the parent Ps. 1,201,698 Ps. (15,475,864 ) Ps. (5,076,855 ) Ps. 20,552,719 Ps. 1,201,698 Non-controlling — — 6,232,385 — 6,232,385 Ps. 1,201,698 Ps. (15,475,864 ) Ps. 1,155,530 Ps. 20,552,719 Ps. 7,434,083 Condensed consolidating statements of comprehensive income For the year ended December 31, 2018 Parent Wholly-owned Combined non-guarantor Eliminations Consolidated Total revenues Ps. 170,887,145 Ps. 190,924,413 Ps. 890,427,121 Ps. (214,030,998 ) Ps. 1,038,207,681 Total cost and operating expenses 129,039,749 183,542,058 799,085,884 (213,017,181 ) 898,650,510 Operating income 41,847,396 7,382,355 91,341,237 (1,013,817 ) 139,557,171 Interest (expense) income, net (24,831,538 ) (11,033,069 ) 14,757,906 (18,563 ) (21,125,264 ) Foreign currency exchange (loss) gain, net 11,805,283 626,304 (19,693,543 ) — (7,261,956 ) Other financing cost, net (4,443,892 ) — (5,732,424 ) — (10,176,316 ) Income tax 17,754,010 798,639 27,924,430 — 46,477,079 Equity interest in net income of associated companies 46,101,188 1,325,723 (2,497,059 ) (44,929,585 ) 267 Net profit (loss) for year Ps. 52,724,427 Ps. (2,497,326 ) Ps. 50,251,687 Ps. (45,961,965 ) Ps. 54,516,823 Distribution of the net profit (loss) to: Equity owners of holding company 52,724,427 (2,497,326 ) 46,641,696 (44,302,600 ) 52,566,197 Non-controlling — — 3,609,991 (1,659,365 ) 1,950,626 Net profit (loss) Ps. 52,724,427 Ps. (2,497,326 ) Ps. 50,251,687 Ps. (45,961,965 ) Ps. 54,516,823 Other comprehensive income items: Net other comprehensive income (loss) to be reclassified to profit or loss in subsequent years: Effect of translation of foreign entities (61,223,458 ) (724,521 ) (64,314,032 ) 61,947,979 (64,314,032 ) Items not to be reclassified to profit or loss in subsequent years: Remeasurement of defined benefit plan, net of income tax effect 652,722 (1,603,145 ) 757,278 950,423 757,278 Equity investments at fair value (3,765,688 ) — (3,765,688 ) 3,765,688 (3,765,688 ) Total other comprehensive income items for the period Ps. (64,336,424 ) Ps. (2,327,666 ) Ps. (67,322,442 ) Ps. 66,664,090 Ps. (67,322,442 ) Total comprehensive income for the period Ps. (11,611,997 ) Ps. (4,824,992 ) Ps. (17,070,755 ) Ps. 20,702,125 Ps. (12,805,619 ) Comprehensive income for the period attributable to: Equity holders of the parent Ps. (11,611,997 ) Ps. (4,824,992 ) Ps. (16,035,363 ) Ps. 20,702,125 Ps. (11,770,227 ) Non-controlling — — (1,035,392 ) — (1,035,392 ) Ps. (11,611,997 ) Ps. (4,824,992 ) Ps. (17,070,755 ) Ps. 20,702,125 Ps. (12,805,619 ) Condensed consolidating statements of cash flows For the year ended December 31, 2016 Parent Wholly-owned Combined non-guarantor Eliminations Consolidated Operating activities: Profit before taxes Ps. 937,247 Ps. (5,537,427 ) Ps. 28,077,775 Ps. — Ps. 23,477,595 Non-cash (997,587 ) 19,800,396 209,821,118 — 228,623,927 Changes in working capital: 74,520,320 9,130,768 (93,359,195 ) (6,595,361 ) (16,303,468 ) Net cash flows provided by operating activities Ps. 74,459,980 Ps. 23,393,737 Ps. 144,539,698 Ps. (6,595,361 ) Ps. 235,798,054 Investing activities: Purchase of property, plant and equipment — (7,860,232 ) (130,846,925 ) — (138,707,157 ) Acquisition of intangibles — (4,947,506 ) (11,369,232 ) — (16,316,738 ) Dividends received from associates 21,950 — 5,988,938 (270,796 ) 5,740,092 Proceeds from sale of plant, property and equipment 20,078 — 95,522 — 115,600 Acquisition of business, net of cash acquired — (2,796,254 ) (1,823,813 ) 2,796,254 (1,823,813 ) Partial sale of shares of associate company 756,444 — 2,796,254 (3,552,698 ) — Investment in associates companies — 663,203 (666,690 ) — (3,487 ) Net cash flows provided by (used in) investing activities Ps. 798,472 Ps. (14,940,789 ) Ps. (135,825,946 ) Ps. (1,027,240 ) Ps. (150,995,503 ) Financing activities: Bank loans, net (39,598,698 ) — (21,792,115 ) — (61,390,813 ) Acquisition of no controlling interest — — (2,280,278 ) — (2,280,278 ) Interest paid (24,826,139 ) (7,972,827 ) (5,922,267 ) 6,595,361 (32,125,872 ) Paid-In — — (756,444 ) 756,444 — Sale of shares of subsidiaries — — 6,323,336 — 6,323,336 Repurchase of shares and others (7,092,385 ) — 71,138 — (7,021,247 ) Payment of dividends (13,437,168 ) — (643,585 ) 270,796 (13,809,957 ) Derivative financial instruments — — (351,213 ) — (351,213 ) Net cash flows (used in) financing activities Ps. (84,954,390 ) Ps. (7,972,827 ) Ps. (25,351,428 ) Ps. 7,622,601 Ps. (110,656,044 ) Net (decrease) increase in cash and cash equivalents (9,695,938 ) 480,121 (16,637,676 ) — (25,853,493 ) Adjustment to cash flow for exchange rate differences — — 3,911,844 — 3,911,844 Cash and cash equivalents at beginning of the period 13,803,584 1,468,036 29,888,412 — 45,160,032 Cash and cash equivalents at end of the period Ps. 4,107,645 Ps. 1,948,159 Ps. 17,162,579 Ps. — Ps. 23,218,383 Condensed consolidating statements of cash flows For the year ended December 31, 2017 Parent Wholly-owned Combined non-guarantor Eliminations Consolidated Operating activities: Profit before taxes Ps. 43,527,320 Ps. (12,182,970 ) Ps. 35,230,373 Ps. (9,477,879 ) Ps. 57,096,844 Non-cash (17,017,287 ) 30,000,109 171,062,158 11,635,563 195,680,543 Changes in working capital: (18,973,478 ) (9,486 ) (66,062,629 ) 50,040,581 (35,005,012 ) Net cash flows provided by operating activities Ps. 7,536,555 Ps. 17,807,653 Ps. 140,229,902 Ps. 52,198,265 Ps. 217,772,375 Investing activities: Purchase of property, plant and equipment 16,526 (5,571,410 ) (113,630,253 ) — (119,185,137 ) Acquisition of intangibles — (3,053,345 ) (14,485,196 ) — (17,538,541 ) Dividends received from associates 21,465,687 970,000 2,385,559 (22,435,687 ) 2,385,559 Proceeds from sale of plant, property and equipment — — 133,349 — 133,349 Acquisition of business, net of cash acquired — (3,381,505 ) (3,497,288 ) — (6,878,793 ) Investment in associates companies — 1,925,898 — (1,925,898 ) — Sale of associated company — — 340,040 — 340,040 Net cash flows provided by (used in) investing activities Ps. 21,482,213 Ps. (9,110,362 ) Ps. (128,753,789 ) Ps. (24,361,585 ) Ps. (140,743,523 ) Financing activities: Bank loans, net 13,548,138 — 16,382,838 (57,364,465 ) (27,433,489 ) Acquisition of no controlling interest — — (11,930 ) — (11,930 ) Interest paid (24,009,216 ) (7,092,098 ) (7,187,225 ) 7,092,098 (31,196,441 ) Repurchase of shares and others (1,240,028 ) — 6,657 — (1,233,371 ) Payment of dividends (14,406,748 ) — (24,120,329 ) 22,435,687 (16,091,390 ) Derivative financial instruments — — (71,474 ) — (71,474 ) Net cash flows used in financing activities Ps. (26,107,854 ) Ps. (7,092,098 ) Ps. (15,001,463 ) Ps. (27,836,680 ) Ps. (76,038,095 ) Net (decrease) increase in cash and cash equivalents 2,910,914 1,605,193 (3,525,350 ) — 990,757 Adjustment to cash flow for exchange rate differences — — 61,333 — 61,333 Cash and cash equivalents at beginning of the period 4,107,645 1,948,159 17,162,579 — 23,218,383 Cash and cash equivalents at end of the period Ps. 7,018,559 Ps. 3,553,352 Ps. 13,698,562 Ps. — Ps. 24,270,473 Condensed consolidating statements of cash flows For the year ended December 31, 2018 Parent Wholly-owned Combined non-guarantor Eliminations Consolidated Operating activities: Profit before taxes Ps. 70,478,437 Ps. (1,698,687 ) Ps. 78,176,117 Ps. (45,961,965 ) Ps. 100,993,902 Non-cash (23,099,316 ) 20,952,414 149,503,016 39,836,704 187,192,818 Changes in working capital: (49,040,542 ) (35,329,228 ) (61,332,380 ) 105,845,958 (39,856,192 ) Net cash flows provided by operating activities Ps. (1,661,421 ) Ps. (16,075,501 ) Ps. 166,346,753 Ps. 99,720,697 Ps. 248,330,528 Investing activities: Purchase of property, plant and equipment (17,709 ) (4,031,228 ) (139,839,096 ) — (143,888,033 ) Acquisition of intangibles — (2,993,373 ) (4,940,274 ) — (7,933,647 ) Dividends received from associates 24,314,803 — 2,622,237 (24,314,803 ) 2,622,237 Proceeds from sale of plant, property and equipment — — 178,532 — 178,532 Acquisition of business, net of cash acquired — — (310,604 ) — (310,604 ) Investment in associates companies — (5,092,881 ) — 5,092,881 — Sale of associated company — — 548,484 — 548,484 Net cash flows provided by (used in) investing activities Ps. 24,297,094 Ps. (12,117,482 ) Ps. (141,740,721 ) Ps. (19,221,922 ) Ps. (148,783,031 ) Financing activities: Bank loans, net 24,784,341 — 19,592,788 (78,428,052 ) (34,050,923 ) Acquisition of no controlling interest — — (115,821 ) — (115,821 ) Interest paid (24,802,363 ) 26,385,526 (6,066,654 ) (26,385,526 ) (30,869,017 ) Repurchase of shares and others (514,007 ) — 2,586 — (511,421 ) Payment of dividends (20,787,102 ) — (25,897,494 ) 24,314,803 (22,369,793 ) Redemption of hybrid bond — — (13,440,120 ) — (13,440,120 ) Net cash flows used in financing activities Ps. (21,319,131 ) Ps. 26,385,526 Ps. (25,924,715 ) Ps. (80,498,775 ) Ps. (101,357,095 ) Net (decrease) increase in cash and cash equivalents 1,316,542 (1,807,457 ) (1,318,683 ) — (1,809,598 ) Adjustment to cash flow for exchange rate differences — — (800,913 ) — (800,913 ) Cash and cash equivalents at beginning of the period 7,018,559 3,553,352 13,698,562 — 24,270,473 Cash and cash equivalents at end of the period Ps. 8,335,101 Ps. 1,745,895 Ps. 11,578,966 Ps. — Ps. 21,659,962

Description of the Business a_2

Description of the Business and Relevant Events - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2018Country
Disclosure of corporate information [abstract]
Corporate information description	América Móvil, S.A.B. de C.V. and subsidiaries (hereinafter, the “Company”, “América Móvil” or “AMX”) was incorporated under laws of Mexico on September 25, 2000. The Company provides telecommunications services in 25 countries throughout Latin America, the United States, the Caribbean and Europe. These telecommunications services include mobile and fixed-line voice services, wireless and fixed data services, internet access and Pay TV, over the top and other related services. The Company also sells equipment, accessories and computers.
Number of countries in which company operates	25
Number of countries in which company holds license	24

Basis of Preparation of the C_4

Basis of Preparation of the Consolidated Financial Statements and Summary of Significant Accounting Policies and Practices - Schedule of Impact of Adoption IFRS 15 on Statements of Financial Position (Detail) $ in Thousands, $ in Millions	Dec. 31, 2018MXN ($)	Dec. 31, 2018USD ($)	Jan. 01, 2018MXN ($)	Dec. 31, 2017MXN ($)	Dec. 31, 2016MXN ($)	Dec. 31, 2015MXN ($)
Current assets:
Subscribers, distributors, recoverable taxes, contract assets and other, net	$ 216,226,920	$ 10,986		$ 193,776,144
Other current assets, net	15,296,193	777		17,352,746
Total current assets	349,055,524	17,734		342,235,218
Non-current assets:
Property, plant and equipment, net	640,000,720	32,516		676,343,198	$ 701,190,066	$ 573,528,878
Liabilities:
Current liabilities	467,090,889	23,731		413,336,497
Deferred income taxes	24,573,441	1,248		11,997,364	14,061,881
Total liabilities	1,183,350,970	60,121		1,225,578,335	1,244,018,507
Total assets	1,429,223,392	72,613		1,486,211,852	1,515,042,274
Equity:
Retained earnings	237,255,485	12,053		171,087,598
Non-controlling interests	49,876,777	2,534		66,469,205
Total equity	245,872,422	12,492		260,633,517	271,023,767	160,854,186
Current liabilities:
Short-term debt and current portion of long-term debt	96,230,634	4,889		51,745,841
Deferred revenues	32,743,843	1,664		34,272,047
Total current liabilities	467,090,889	23,731		413,336,497
Non-current-liabilities:
Long-term debt	542,691,819	27,572		646,139,058
Deferred income taxes	24,573,441	1,248		11,997,364	14,061,881
Other liabilities	173,568,262			166,102,780
Total liabilities	1,183,350,970	60,121		1,225,578,335	1,244,018,507
Total equity	245,872,422	12,492		260,633,517	$ 271,023,767	$ 160,854,186
Total liabilities and equity	1,429,223,392	$ 72,613		$ 1,486,211,852
Increase/(decrease) [member]
Current assets:
Subscribers, distributors, recoverable taxes, contract assets and other, net	30,923,286		$ 31,261,436
Total current assets	30,923,286
Non-current assets:
Subscribers, distributors, recoverable taxes, contract assets and other, net	5,437,263
Liabilities:
Current liabilities	1,095,625		562,651
Deferred income taxes	9,190,941		8,725,841
Total liabilities	10,286,566		9,288,492
Total assets	36,360,549
Equity:
Retained earnings			21,454,504
Non-controlling interests			518,440
Total equity	26,073,983		21,972,944
Current liabilities:
Accounts payable and other liabilities	667,472
Deferred revenues	428,153
Total current liabilities	1,095,625		562,651
Non-current-liabilities:
Deferred income taxes	9,190,941		8,725,841
Total liabilities	10,286,566		9,288,492
Total equity	26,073,983		21,972,944
Total liabilities and equity	36,360,549		$ 31,261,436
IFRS 15 [member]
Current assets:
Cash and cash equivalents and equity investments at fair value	70,675,896
Subscribers, distributors, recoverable taxes, contract assets and other, net	216,226,920
Other current assets, net	62,152,708
Total current assets	349,055,524
Non-current assets:
Property, plant and equipment, net	640,000,720
Intangibles and other assets, net	424,485,276
Subscribers, distributors, recoverable taxes, contract assets and other, net	15,681,872
Liabilities:
Current liabilities	467,090,889
Deferred income taxes	24,573,441
Total liabilities	1,183,350,970
Total assets	1,429,223,392
Equity:
Total equity	245,872,422
Current liabilities:
Short-term debt and current portion of long-term debt	96,230,634
Accounts payable and other liabilities	338,116,412
Deferred revenues	32,743,843
Total current liabilities	467,090,889
Non-current-liabilities:
Long-term debt	542,691,819
Deferred income taxes	24,573,441
Other liabilities	148,994,821
Total liabilities	1,183,350,970
Total equity	245,872,422
Total liabilities and equity	1,429,223,392
Previous IFRS [member]
Current assets:
Cash and cash equivalents and equity investments at fair value	70,675,896
Subscribers, distributors, recoverable taxes, contract assets and other, net	185,303,634
Other current assets, net	62,152,708
Total current assets	318,132,238
Non-current assets:
Property, plant and equipment, net	640,000,720
Intangibles and other assets, net	424,485,276
Subscribers, distributors, recoverable taxes, contract assets and other, net	10,244,609
Liabilities:
Current liabilities	465,995,264
Deferred income taxes	15,382,500
Total liabilities	1,173,064,404
Total assets	1,392,862,843
Equity:
Total equity	219,798,439
Current liabilities:
Short-term debt and current portion of long-term debt	96,230,634
Accounts payable and other liabilities	337,448,940
Deferred revenues	32,315,690
Total current liabilities	465,995,264
Non-current-liabilities:
Long-term debt	542,691,819
Deferred income taxes	15,382,500
Other liabilities	148,994,821
Total liabilities	1,173,064,404
Total equity	219,798,439
Total liabilities and equity	$ 1,392,862,843

Basis of Preparation of the C_5

Basis of Preparation of the Consolidated Financial Statements and Summary of Significant Accounting Policies and Practices - Schedule of Impact of Adoption IFRS 15 on Statements of Comprehensive Income (Detail) $ in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2018MXN ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017MXN ($)	Dec. 31, 2016MXN ($)
Operating revenues:
Revenues services	$ 863,647,642	$ 43,878	$ 878,411,323	$ 831,885,365
Operating revenues	1,038,207,681	52,747	1,021,633,535	975,412,488
Operating costs and expenses:
Cost of sales and services	508,822,430	25,851	496,335,746	485,060,579
Depreciation and amortization	155,712,580	7,911	160,174,942	148,525,921
Operating costs and expenses	898,650,510	45,657	921,490,232	865,802,178
Operating income	139,557,171	7,090	100,143,303	109,610,310
Equity interest in net result of associated companies	267		91,385	189,950
Income tax	(46,477,079)	(2,361)	(24,941,511)	(11,398,856)
Non-controlling interests	1,950,626	100	2,829,412	3,429,312
Net profit for the year	54,516,823	$ 2,770	32,155,333	12,078,739
IFRS 15 [member]
Operating revenues:
Revenues services	863,647,642
Sales of equipment	174,560,039
Operating revenues	1,038,207,681
Operating costs and expenses:
Cost of sales and services	508,822,430
Commercial, administrative and general and other expenses	234,115,500
Depreciation and amortization	155,712,580
Operating costs and expenses	898,650,510
Operating income	139,557,171
Financial items, net	38,563,536
Equity interest in net result of associated companies	267
Income tax	46,477,079
Non-controlling interests	(1,950,626)
Net profit for the year	52,566,197
Previous IFRS [member]
Operating revenues:
Revenues services	881,530,167		$ 878,411,323	$ 831,885,365
Sales of equipment	158,721,765
Operating revenues	1,040,251,932
Operating costs and expenses:
Cost of sales and services	509,100,174
Commercial, administrative and general and other expenses	240,010,631
Depreciation and amortization	155,712,580
Operating costs and expenses	904,823,385
Operating income	135,428,547
Financial items, net	38,356,359
Equity interest in net result of associated companies	267
Income tax	45,496,698
Non-controlling interests	(1,950,626)
Net profit for the year	49,625,131
Increase/(decrease) [member]
Operating revenues:
Revenues services	(17,882,525)
Sales of equipment	15,838,274
Operating revenues	(2,044,251)
Operating costs and expenses:
Cost of sales and services	(277,744)
Commercial, administrative and general and other expenses	(5,895,131)
Operating costs and expenses	(6,172,875)
Operating income	4,128,624
Financial items, net	207,177
Income tax	980,381
Net profit for the year	$ 2,941,066

Basis of Preparation of the C_6

Basis of Preparation of the Consolidated Financial Statements and Summary of Significant Accounting Policies and Practices - Additional Information (Detail) $ in Millions	Jan. 01, 2018MXN ($)	Dec. 31, 2018MXN ($)Segment	Dec. 31, 2017MXN ($)	Dec. 31, 2016MXN ($)	Apr. 09, 2019	Dec. 31, 2018USD ($)
Disclosure of basis of preparation of consolidated financial statements and summary of significant accounting policies and practices [line items]
Impairment on trade receivables	$ 2,400,783,000
Impairment losses that impacted the carrying amount of debt instruments at fair value through OCI	$ 0
Cumulative index		184.255
Percentage of annual basis index		48.00%
Closing exchange rate		0.5221				0.5221
Cumulative translation (loss) gain		$ (137,598,218,000)	$ (73,261,794,000)			$ (6,990)
Impairment losses on goodwill		0	0	$ 0
Borrowing costs capitalised		2,020,288,000	2,875,034,000	2,861,307,000
Impairment losses		0	0	0
Impairment losses on intangibles		$ 0	0	0
Description of estimation of impairment cash-generating unit		In the estimation of impairments, the Company uses the strategic plans established for the separate cash-generating units to which the assets are assigned. Such strategic plans generally cover a period from 3 to 5 years. For longer periods, beginning in the fifth year, projections are based on such strategic plans while applying a constant or declining expected perpetual growth rate.
Percentage of sensitivity analysis for increase in capital expenditures		5.00%
Adjustments of sensitivity analysis long-life assets		$ 1,558,823,000
Increase in weighted average cost of capital basis		0.50%
Adjustments for assumption of weighted average cost of capital		$ 1,135,854,000
Monthly contributions to pension fund		17.50%
Percentage of employee profit sharing based on individual company taxable income		10.00%
Advertising expenses		$ 26,255,952,000	28,718,563,000	$ 28,180,538,000
Increase (decrease) in interest expense		$ 638,922,453,000	$ 697,884,899,000
Concentration risk percentage		10.00%				10.00%
Number of segments | Segment		0
Foreign subsidiaries [member]
Disclosure of basis of preparation of consolidated financial statements and summary of significant accounting policies and practices [line items]
Consolidated operating revenues		73.00%	74.00%	72.00%
Percentage of operating revenue as percentage of total assets		80.00%	81.00%
Cost of sales [member]
Disclosure of basis of preparation of consolidated financial statements and summary of significant accounting policies and practices [line items]
Employee benefits expense		$ 47,671,143,000	$ 48,696,331,000	$ 46,759,415,000
Commercial, administrative and general expenses [member]
Disclosure of basis of preparation of consolidated financial statements and summary of significant accounting policies and practices [line items]
Employee benefits expense		$ 67,936,876,000	$ 66,920,537,000	$ 63,691,855,000
Interest rate risk [member]
Disclosure of basis of preparation of consolidated financial statements and summary of significant accounting policies and practices [line items]
Increase in basis points		1.00%
Increase in net interest expense		$ 32,136,984,000
Increase (decrease) in interest expense		$ (31,773,439,000)
Currency risk [member]
Disclosure of basis of preparation of consolidated financial statements and summary of significant accounting policies and practices [line items]
Fluctuation in exchange rates		5.00%				5.00%
Increase (decrease) in interest expense		$ 638,922,453,000
Increase (decrease) through changes in foreign exchange rates, regulatory deferral account credit balances		3,165,958,000
Increase (decrease) through changes in discount rates, regulatory deferral account credit balances		$ (10,940,798,000)
Increase/(decrease) in exchange rates		5.00%
Bottom of range [member]
Disclosure of basis of preparation of consolidated financial statements and summary of significant accounting policies and practices [line items]
Term of selling equipment under financing model		12 months
Top of range [member]
Disclosure of basis of preparation of consolidated financial statements and summary of significant accounting policies and practices [line items]
Term of selling equipment under financing model		36 months
U.S.A. [member]
Disclosure of basis of preparation of consolidated financial statements and summary of significant accounting policies and practices [line items]
Closing exchange rate					18.9701
Argentina [member]
Disclosure of basis of preparation of consolidated financial statements and summary of significant accounting policies and practices [line items]
Closing exchange rate		0.5221	1.0610			0.5221
Argentina [member] | Impact of application of hyperinflation adjustments in 2018 [member]
Disclosure of basis of preparation of consolidated financial statements and summary of significant accounting policies and practices [line items]
Cumulative inflation percentage		100.00%
Cumulative inflation period		3 years
U.S.A. [member]
Disclosure of basis of preparation of consolidated financial statements and summary of significant accounting policies and practices [line items]
Closing exchange rate		19.6829	19.7867			19.6829
Cumulative translation adjustment [member]
Disclosure of basis of preparation of consolidated financial statements and summary of significant accounting policies and practices [line items]
Cumulative translation (loss) gain		$ (53,357,300,000)	$ 7,866,158,000
Licenses and rights of use [member]
Disclosure of basis of preparation of consolidated financial statements and summary of significant accounting policies and practices [line items]
Intangibles useful life		Licenses are amortized when the Company does not have a basis to conclude that they are indefinite lived. Licenses are amortized using the straight-line method over a period ranging from 3 to 30 years, which represents the usage period of the assets.
Licenses and rights of use [member] | Bottom of range [member]
Disclosure of basis of preparation of consolidated financial statements and summary of significant accounting policies and practices [line items]
Estimated useful lives		3 years
Licenses and rights of use [member] | Top of range [member]
Disclosure of basis of preparation of consolidated financial statements and summary of significant accounting policies and practices [line items]
Estimated useful lives		30 years
Trademarks [member] | Bottom of range [member]
Disclosure of basis of preparation of consolidated financial statements and summary of significant accounting policies and practices [line items]
Estimated useful lives		1 year
Trademarks [member] | Top of range [member]
Disclosure of basis of preparation of consolidated financial statements and summary of significant accounting policies and practices [line items]
Estimated useful lives		10 years
Customer relationships [member]
Disclosure of basis of preparation of consolidated financial statements and summary of significant accounting policies and practices [line items]
Intangibles useful life		Amortized on a 5 year period.
Estimated useful lives		5 years

Basis of Preparation of the C_7

Basis of Preparation of the Consolidated Financial Statements and Summary of Significant Accounting Policies and Practices - Schedule of Effect of Adoption of IFRS 9 in Retained Earnings and Other Components of Equity (Detail) $ in Thousands, $ in Millions	Dec. 31, 2018MXN ($)	Dec. 31, 2018USD ($)	Jan. 01, 2018MXN ($)	Dec. 31, 2017MXN ($)	Dec. 31, 2016MXN ($)	Dec. 31, 2015MXN ($)
Assets
Deferred tax assets	$ 111,186,768	$ 5,649		$ 116,571,349	$ 112,651,699
Total assets	1,429,223,392	72,613		1,486,211,852	1,515,042,274
Equity
Retained earnings	237,255,485	12,053		171,087,598
Total adjustment on equity	$ 245,872,422	$ 12,492		$ 260,633,517	$ 271,023,767	$ 160,854,186
Adjustments [member]
Assets
Trade receivables			$ (2,400,783)
Deferred tax assets			544,628
Total assets			(1,856,155)
Equity
Retained earnings			(1,856,155)
Total adjustment on equity			$ (1,856,155)

Basis of Preparation of the C_8

Basis of Preparation of the Consolidated Financial Statements and Summary of Significant Accounting Policies and Practices - Schedule of Impact in Consolidated Financial Statements upon Application of Hyperinflation (Detail) $ in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2018MXN ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017MXN ($)	Dec. 31, 2016MXN ($)	Dec. 31, 2018USD ($)	Dec. 31, 2015MXN ($)
Disclosure of corporate information [Line Items]
Operating revenues	$ 1,038,207,681	$ 52,747	$ 1,021,633,535	$ 975,412,488
Gain on net monetary positions	4,429,145	225
Income tax	(46,477,079)	(2,361)	(24,941,511)	(11,398,856)
Operating income	139,557,171	$ 7,090	100,143,303	109,610,310
Current assets	349,055,524		342,235,218		$ 17,734
Total liabilities	1,183,350,970		1,225,578,335	1,244,018,507	60,121
Total equity	245,872,422		$ 260,633,517	$ 271,023,767	$ 12,492	$ 160,854,186
Argentina [member] | Impact of application of hyperinflation adjustments in 2018 [member]
Disclosure of corporate information [Line Items]
Operating revenues	6,286,140
Operating loss	(1,423,252)
Financial loss	(1,289,317)
Gain on net monetary positions	4,429,145
Income tax	(770,928)
Operating income	945,647
Current assets	1,866,674
Non-current assets	19,796,073
Total liabilities	4,890,166
Total equity	$ 16,772,581

Basis of Preparation of the C_9

Basis of Preparation of the Consolidated Financial Statements and Summary of Significant Accounting Policies and Practices - Schedule of Impact in Consolidated Financial Statements upon Application of Hyperinflation (Parenthetical) (Detail) $ in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2018MXN ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017MXN ($)	Dec. 31, 2016MXN ($)
Disclosure of corporate information [Line Items]
Hyperinflation adjustment	$ (15,826,934)
Net effect	139,557,171	$ 7,090	$ 100,143,303	$ 109,610,310
Argentina [member] | Impact of application of hyperinflation adjustments in 2018 [member]
Disclosure of corporate information [Line Items]
Hyperinflation adjustment	15,826,934
Net effect	$ 945,647

Basis of Preparation of the _10

Basis of Preparation of the Consolidated Financial Statements and Summary of Significant Accounting Policies and Practices - Summary of Equity Interest in Most Significant Subsidiaries (Detail)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Netherlands [member] | America Movil B. V. [member]
Disclosure of subsidiaries [line items]
Percentage of equity interest	100.00%	100.00%
Mexico [member] | Sercotel, S.A. de C.V. [member]
Disclosure of subsidiaries [line items]
Percentage of equity interest	100.00%	100.00%
Mexico [member] | Radiomovil Dipsa, S.A. de C.V. and subsidiaries (Telcel) [member]
Disclosure of subsidiaries [line items]
Percentage of equity interest	100.00%	100.00%
Mexico [member] | Claro Panama, S.A. [member]
Disclosure of subsidiaries [line items]
Percentage of equity interest	100.00%	100.00%
Mexico [member] | Telefonos De Mexico S.A.B. de C.V [member]
Disclosure of subsidiaries [line items]
Percentage of equity interest	98.80%	98.80%
Dominican Republic [member] | Compania Dominicana De Telefonos S.A. (Codetel) [member]
Disclosure of subsidiaries [line items]
Percentage of equity interest	100.00%	100.00%
Puerto Rico [member] | Puerto Rico Telephone Company Inc [member]
Disclosure of subsidiaries [line items]
Percentage of equity interest	100.00%	100.00%
Honduras [member] | Servicios de Comunicaciones de Honduras, S.A. de C.V.(Sercom Honduras) [member]
Disclosure of subsidiaries [line items]
Percentage of equity interest	100.00%	100.00%
U.S.A. [member] | TracFone Wireless, Inc. (TracFone) [member]
Disclosure of subsidiaries [line items]
Percentage of equity interest	100.00%	100.00%
Brazil [member] | Claro S.A. (Claro Brasil) [member]
Disclosure of subsidiaries [line items]
Percentage of equity interest	98.20%	97.70%
Guatemala [member] | Telecomunicaciones de Guatemala, S.A. (Telgua) [member]
Disclosure of subsidiaries [line items]
Percentage of equity interest	99.30%	99.30%
Nicaragua [member] | Empresa Nicaraguense de Telecomunicaciones, S.A. (Enitel) [member]
Disclosure of subsidiaries [line items]
Percentage of equity interest	99.60%	99.60%
El Salvador [member] | Compania de Telecomunicaciones de El Salvador, S.A. de C.V. (CTE) [member]
Disclosure of subsidiaries [line items]
Percentage of equity interest	95.80%	95.80%
Colombia [member] | Comunicacion Celular S. A. (Comcel) [member]
Disclosure of subsidiaries [line items]
Percentage of equity interest	99.40%	99.40%
Colombia [member] | Telmex Colombia, S.A. [member]
Disclosure of subsidiaries [line items]
Percentage of equity interest	99.30%	99.30%
Ecuador [member] | Consorcio Ecuatoriano de Telecomunicaciones, S.A. (Conecel) [member]
Disclosure of subsidiaries [line items]
Percentage of equity interest	100.00%	100.00%
Argentina [member] | AMX Argentina, S.A. [member]
Disclosure of subsidiaries [line items]
Percentage of equity interest	100.00%	100.00%
Paraguay [member] | AMX Paraguay, S.A. [member]
Disclosure of subsidiaries [line items]
Percentage of equity interest	100.00%	100.00%
Uruguay [member] | AM Wireless Uruguay, S.A.[member]
Disclosure of subsidiaries [line items]
Percentage of equity interest	100.00%	100.00%
Chile [member] | Claro Chile S A [member]
Disclosure of subsidiaries [line items]
Percentage of equity interest	100.00%	100.00%
Peru [member] | America Movil Peru S.A. C. [member]
Disclosure of subsidiaries [line items]
Percentage of equity interest	100.00%	100.00%
Austria [member] | Telekom Austria AG [member]
Disclosure of subsidiaries [line items]
Percentage of equity interest	51.00%	51.00%

Basis of Preparation of the _11

Basis of Preparation of the Consolidated Financial Statements and Summary of Significant Accounting Policies and Practices - Summary of Annual Depreciation Rates (Detail)	12 Months Ended
	Dec. 31, 2018
Bottom of range [member] | Network infrastructure [member]
Disclosure of detailed information about property, plant and equipment [line items]
Annual depreciation rates	5.00%
Bottom of range [member] | Buildings and leasehold improvements [member]
Disclosure of detailed information about property, plant and equipment [line items]
Annual depreciation rates	2.00%
Bottom of range [member] | Other assets [member]
Disclosure of detailed information about property, plant and equipment [line items]
Annual depreciation rates	10.00%
Top of range [member] | Network infrastructure [member]
Disclosure of detailed information about property, plant and equipment [line items]
Annual depreciation rates	33.00%
Top of range [member] | Buildings and leasehold improvements [member]
Disclosure of detailed information about property, plant and equipment [line items]
Annual depreciation rates	33.00%
Top of range [member] | Other assets [member]
Disclosure of detailed information about property, plant and equipment [line items]
Annual depreciation rates	50.00%

Basis of Preparation of the _12

Basis of Preparation of the Consolidated Financial Statements and Summary of Significant Accounting Policies and Practices - Schedule of Estimate Impairment Evaluations (Detail)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Brazil [member]
Disclosure of impairment of assets [line items]
Average margin on EBIDTA	36.43%	35.28%
Average margin on CAPEX	21.88%	22.13%
Average pre-tax discount rate (WACC)	10.38%	11.71%
Puerto Rico [member]
Disclosure of impairment of assets [line items]
Average margin on EBIDTA	23.86%	23.31%
Average margin on CAPEX	9.89%	8.31%
Average pre-tax discount rate (WACC)	4.81%	4.42%
Dominican Republic [member]
Disclosure of impairment of assets [line items]
Average margin on EBIDTA	48.64%	45.79%
Average margin on CAPEX	18.43%	15.55%
Average pre-tax discount rate (WACC)	17.66%	19.23%
Mexico [member]
Disclosure of impairment of assets [line items]
Average margin on EBIDTA	36.33%	35.48%
Average margin on CAPEX	7.93%	8.72%
Average pre-tax discount rate (WACC)	16.30%	16.13%
Ecuador [member]
Disclosure of impairment of assets [line items]
Average margin on EBIDTA	39.83%	37.83%
Average margin on CAPEX	11.26%	10.07%
Average pre-tax discount rate (WACC)	24.45%	23.57%
Peru [member]
Disclosure of impairment of assets [line items]
Average margin on EBIDTA	30.29%	29.64%
Average margin on CAPEX	19.95%	16.75%
Average pre-tax discount rate (WACC)	11.52%	13.61%
El Salvador [member]
Disclosure of impairment of assets [line items]
Average margin on EBIDTA	45.36%	40.36%
Average margin on CAPEX	22.61%	17.99%
Average pre-tax discount rate (WACC)	18.01%	25.14%
Chile [member]
Disclosure of impairment of assets [line items]
Average margin on EBIDTA	25.91%	22.04%
Average margin on CAPEX	14.99%	12.45%
Average pre-tax discount rate (WACC)	6.62%	6.15%
Colombia [member]
Disclosure of impairment of assets [line items]
Average margin on EBIDTA	45.01%	41.93%
Average margin on CAPEX	17.14%	19.88%
Average pre-tax discount rate (WACC)	20.29%	19.06%
Bottom of range [member] | Europe [member]
Disclosure of impairment of assets [line items]
Average margin on EBIDTA	22.13%	25.59%
Average margin on CAPEX	8.13%	7.34%
Average pre-tax discount rate (WACC)	8.36%	9.06%
Bottom of range [member] | Other countries [member]
Disclosure of impairment of assets [line items]
Average margin on EBIDTA	7.90%	9.16%
Average margin on CAPEX	0.61%	0.43%
Average pre-tax discount rate (WACC)	9.97%	7.89%
Top of range [member] | Europe [member]
Disclosure of impairment of assets [line items]
Average margin on EBIDTA	41.51%	52.46%
Average margin on CAPEX	19.40%	14.97%
Average pre-tax discount rate (WACC)	22.08%	19.04%
Top of range [member] | Other countries [member]
Disclosure of impairment of assets [line items]
Average margin on EBIDTA	45.91%	48.18%
Average margin on CAPEX	23.96%	23.43%
Average pre-tax discount rate (WACC)	31.63%	24.28%

Basis of Preparation of the _13

Basis of Preparation of the Consolidated Financial Statements and Summary of Significant Accounting Policies and Practices - Schedule of Estimate Impairment Evaluations (Parenthetical) (Detail) - Country	Dec. 31, 2018	Dec. 31, 2017
Disclosure of impairment of assets [line items]
Number of countries	25
Europe [member]
Disclosure of impairment of assets [line items]
Number of countries	7	7

Basis of Preparation of the _14

Basis of Preparation of the Consolidated Financial Statements and Summary of Significant Accounting Policies and Practices - Summary of Exchange Rates Used for Translation of Foreign Currencies (Detail)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of transactions in foreign currency [line items]
Closing exchange rate	0.5221
Argentina [member]
Disclosure of transactions in foreign currency [line items]
Average exchange rate	0.7311	1.1489	1.2632
Closing exchange rate	0.5221	1.0610
Brazil [member]
Disclosure of transactions in foreign currency [line items]
Average exchange rate	5.2937	5.9346	5.3868
Closing exchange rate	5.0797	5.9815
Colombia [member]
Disclosure of transactions in foreign currency [line items]
Average exchange rate	0.0065	0.0064	0.0061
Closing exchange rate	0.0061	0.0066
Guatemala [member]
Disclosure of transactions in foreign currency [line items]
Average exchange rate	2.5591	2.5755	2.4548
Closing exchange rate	2.5440	2.6940
U.S.A. [member]
Disclosure of transactions in foreign currency [line items]
Average exchange rate	19.2397	18.9400	18.6529
Closing exchange rate	19.6829	19.7867
Uruguay [member]
Disclosure of transactions in foreign currency [line items]
Average exchange rate	0.6274	0.6606	0.6206
Closing exchange rate	0.6074	0.6869
Nicaragua [member]
Disclosure of transactions in foreign currency [line items]
Average exchange rate	0.6097	0.6307	0.6515
Closing exchange rate	0.6088	0.6428
Honduras [member]
Disclosure of transactions in foreign currency [line items]
Average exchange rate	0.7994	0.8007	0.8109
Closing exchange rate	0.8031	0.8330
Chile [member]
Disclosure of transactions in foreign currency [line items]
Average exchange rate	0.0300	0.0292	0.0276
Closing exchange rate	0.0283	0.0322
Paraguay [member]
Disclosure of transactions in foreign currency [line items]
Average exchange rate	0.0034	0.0034	0.0033
Closing exchange rate	0.0033	0.0035
Peru [member]
Disclosure of transactions in foreign currency [line items]
Average exchange rate	5.8517	5.8054	5.5232
Closing exchange rate	5.8406	6.0976
Dominican Republic [member]
Disclosure of transactions in foreign currency [line items]
Average exchange rate	0.3876	0.3983	0.4048
Closing exchange rate	0.3898	0.4095
Costa Rica [member]
Disclosure of transactions in foreign currency [line items]
Average exchange rate	0.0332	0.0331	0.0338
Closing exchange rate	0.0322	0.0346
European Union [member]
Disclosure of transactions in foreign currency [line items]
Average exchange rate	22.7101	21.3649	20.6334
Closing exchange rate	22.5586	23.7539
Bulgaria [member]
Disclosure of transactions in foreign currency [line items]
Average exchange rate	11.6110	10.9223	10.5483
Closing exchange rate	11.5327	12.1406
Belarus [member]
Disclosure of transactions in foreign currency [line items]
Average exchange rate	9.4451	9.8087	9.3929
Closing exchange rate	9.1319	9.9882
Croatia [member]
Disclosure of transactions in foreign currency [line items]
Average exchange rate	3.0613	2.8619	2.7392
Closing exchange rate	3.0435	3.1954
Macedonia [member]
Disclosure of transactions in foreign currency [line items]
Average exchange rate	0.3688	0.3471	0.3350
Closing exchange rate	0.3667	0.3861
Serbia [member]
Disclosure of transactions in foreign currency [line items]
Average exchange rate	0.1920	0.1762	0.1676
Closing exchange rate	0.1907	0.2009

Basis of Preparation of the _15

Basis of Preparation of the Consolidated Financial Statements and Summary of Significant Accounting Policies and Practices - Summary of Retrospective Reclassification of Financial Statements (Detail) $ in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2018MXN ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017MXN ($)	Dec. 31, 2016MXN ($)
Operating revenues:
Revenues services			$ 878,411,323	$ 831,885,365
Revenue from rendering of service	$ 863,647,642	$ 43,878	878,411,323	831,885,365
Previous IFRS [member]
Operating revenues:
Mobile voice services			221,751,600	242,302,380
Fixed voice services			89,856,743	95,299,154
Mobile data services			308,526,994	256,936,895
Fixed data services			139,277,613	126,278,206
Pay television			86,882,606	78,268,778
Other related services			32,115,767	32,799,952
Revenue from rendering of service	$ 881,530,167		878,411,323	831,885,365
Retrospective reclassification [member]
Operating revenues:
Mobile voice services			(221,751,600)	(242,302,380)
Fixed voice services			(89,856,743)	(95,299,154)
Mobile data services			(308,526,994)	(256,936,895)
Fixed data services			(139,277,613)	(126,278,206)
Pay television			(86,882,606)	(78,268,778)
Other related services			(32,115,767)	(32,799,952)
Revenues services			$ 878,411,323	$ 831,885,365

Equity Investments at Fair Va_2

Equity Investments at Fair Value Through OCI and Other Short-term Investments - Additional Information (Detail) - MXN ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of equity investments at fair value through other comprehensive income and other short-term investments [line items]
Dividends received	$ 2,605,333	$ 2,385,559	$ 5,740,092
Investments accounted for using equity method Koninklijke KPN [member]
Disclosure of equity investments at fair value through other comprehensive income and other short-term investments [line items]
Other short-term investments	9,987,851	12,438,019
Changes in fair value of investment	(3,765,688)	622,424
Dividends received	2,605,333	2,370,559	$ 5,740,092
Equity and other short term investments [member] | Investments accounted for using equity method Koninklijke KPN [member]
Disclosure of equity investments at fair value through other comprehensive income and other short-term investments [line items]
Equity investments at fair value through OCI	39,028,083	46,682,657
Other short-term investments	$ 9,987,851	$ 12,438,019

Accounts Receivable from Subs_3

Accounts Receivable from Subscribers, Distributors, Recoverable Taxes Contractual Assets and Other, Net - Summary of Analysis of Accounts Receivable by Component (Detail) $ in Thousands, $ in Millions	Dec. 31, 2018MXN ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017MXN ($)
Disclosure of accounts receivable [line items]
Contractual assets	$ 34,718,749
Impairment of trade receivables	(40,798,025)		$ (39,044,925)
Trade and other receivables	231,908,792		203,562,725
Non-current subscribers, distributors and contractual assets	15,681,872	$ 797	9,786,581
Total current subscribers, distributors and contractual assets	216,226,920	$ 10,986	193,776,144
Cost [member] | Receivable from subscribers and distributors [member]
Disclosure of accounts receivable [line items]
Trade and other receivables	173,053,226		178,722,706
Cost [member] | Telecommunications carriers for network interconnection and other services [member]
Disclosure of accounts receivable [line items]
Trade and other receivables	5,543,263		8,671,416
Cost [member] | Recoverable taxes [member]
Disclosure of accounts receivable [line items]
Trade and other receivables	46,706,298		40,477,188
Cost [member] | Sundry debtors [member]
Disclosure of accounts receivable [line items]
Trade and other receivables	$ 12,685,281		$ 14,736,340

Accounts Receivable from Subs_4

Accounts Receivable from Subscribers, Distributors, Recoverable Taxes Contractual Assets and Other, Net - Summary of Analysis of Accounts Receivable by Component (Parenthetical) (Detail) - PIS and COFINS [member] $ in Thousands	12 Months Ended
	Dec. 31, 2018MXN ($)
Disclosure of accounts receivable [line items]
Tax on the Circulation of Goods and the Provision	$ 12,295,869
Amount of interest income	$ 6,127,656

Accounts Receivable from Subs_5

Accounts Receivable from Subscribers, Distributors, Recoverable Taxes Contractual Assets and Other, Net - Schedule of Changes in Allowance for Expected Credit Losses (Detail) - MXN ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Subclassifications of assets, liabilities and equities [abstract]
Balance at beginning of year	$ (39,044,925)	$ (37,351,677)	$ (27,495,158)
Increases recorded in expenses	(19,535,707)	(20,766,362)	(16,987,769)
Adjustment on initial application of IFRS 9	(2,400,783)
Write-offs	15,497,254	17,713,992	12,587,567
Translation effect	4,686,136	1,359,122	(5,456,317)
Balance at end of year	$ (40,798,025)	$ (39,044,925)	$ (37,351,677)

Accounts Receivable from Subs_6

Accounts Receivable from Subscribers, Distributors, Recoverable Taxes Contractual Assets and Other, Net - Summary of Aging of Accounts Receivable (Detail) - MXN ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Disclosure of accounts receivable [line items]
Trade and other receivables	$ 231,908,792	$ 203,562,725
Receivable from subscribers and distributors [member] | Cost [member]
Disclosure of accounts receivable [line items]
Trade and other receivables	173,053,226	178,722,706
Receivable from subscribers and distributors [member] | 1 - 30 days [member] | Cost [member]
Disclosure of accounts receivable [line items]
Trade and other receivables	46,816,302	46,758,825
Receivable from subscribers and distributors [member] | 31 - 60 days [member] | Cost [member]
Disclosure of accounts receivable [line items]
Trade and other receivables	6,315,277	6,780,671
Receivable from subscribers and distributors [member] | 61 - 90 days [member] | Cost [member]
Disclosure of accounts receivable [line items]
Trade and other receivables	4,168,952	4,375,188
Receivable from subscribers and distributors [member] | Greater than 90 days [member] | Cost [member]
Disclosure of accounts receivable [line items]
Trade and other receivables	53,129,041	42,423,848
Unbilled services provided [member] | Receivable from subscribers and distributors [member] | Cost [member]
Disclosure of accounts receivable [line items]
Trade and other receivables	$ 62,623,654	$ 78,384,174

Accounts Receivable from Subs_7

Accounts Receivable from Subscribers, Distributors, Recoverable Taxes Contractual Assets and Other, Net - Summary of Accounts Receivable From Subscribers and Distributors Included in Impairments of Trade Receivables (Detail) - Receivable from subscribers and distributors [member] - MXN ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Disclosure of accounts receivable [line items]
Allowance for bad debts	$ 40,798,025	$ 39,044,925
1 - 90 days [member]
Disclosure of accounts receivable [line items]
Allowance for bad debts	4,079,803	3,807,945
Greater than 90 days [member]
Disclosure of accounts receivable [line items]
Allowance for bad debts	$ 36,718,222	$ 35,236,980

Accounts Receivable from Subs_8

Accounts Receivable from Subscribers, Distributors, Recoverable Taxes Contractual Assets and Other, Net - Summary of Analysis of Contract Assets and Liabilities (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2018MXN ($)
Contract Assets:
Beginning balance	$ 29,640,953
Additions	32,029,279
Disposals	(25,243,487)
Translation effect	(1,707,996)
Ending balance	34,718,749
Non-current contract assets	5,437,263
Current portion contracts assets	$ 29,281,486

Related Parties - Summary of An

Related Parties - Summary of Analysis of the Balances with Related Parties (Detail) - MXN ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Disclosure of receivables and payables arising from related party transactions [line items]
Amounts receivable from related party transactions	$ 1,263,605	$ 868,230
Amounts payable to related party transactions	2,974,213	2,540,412
Sears Roebuck de Mexico, SA de CV [member]
Disclosure of receivables and payables arising from related party transactions [line items]
Amounts receivable from related party transactions	264,976	211,491
Sanborns Hermanos, SA [member]
Disclosure of receivables and payables arising from related party transactions [line items]
Amounts receivable from related party transactions	312,706	91,233
Grupo Condumex, SA de CV and Subsidiaries [member]
Disclosure of receivables and payables arising from related party transactions [line items]
Amounts receivable from related party transactions	35,007	47,269
Amounts payable to related party transactions	784,678	812,427
Carso Infraestructura y Construccion, SA de CV and Subsidiaries [member]
Disclosure of receivables and payables arising from related party transactions [line items]
Amounts receivable from related party transactions	179,852	89,585
Amounts payable to related party transactions	1,403,414	947,761
Enesa, SA de CV and Subsidiaries [member]
Disclosure of receivables and payables arising from related party transactions [line items]
Amounts payable to related party transactions	22,630	50,609
Grupo Financiero Inbursa, SAB de CV [member]
Disclosure of receivables and payables arising from related party transactions [line items]
Amounts payable to related party transactions	235,745	38,847
Operadora de Sites Mexicanos, SA de CV [member]
Disclosure of receivables and payables arising from related party transactions [line items]
Amounts receivable from related party transactions	16,634	14,252
Patrimonial Inbursa, SA [member]
Disclosure of receivables and payables arising from related party transactions [line items]
Amounts receivable from related party transactions	214,180	246,874
Other related parties [member]
Disclosure of receivables and payables arising from related party transactions [line items]
Amounts receivable from related party transactions	240,250	167,526
Amounts payable to related party transactions	217,230	277,276
Fianzas Guardiana Inbursa, SA de CV [member]
Disclosure of receivables and payables arising from related party transactions [line items]
Amounts payable to related party transactions	227,014	276,633
PC Industrial, SA de CV and Subsidiaries [member]
Disclosure of receivables and payables arising from related party transactions [line items]
Amounts payable to related party transactions	$ 83,502	$ 136,859

Related Parties - Additional In

Related Parties - Additional Information (Detail) - MXN ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of transactions between related parties [line items]
Impairment of receivables in connection with amounts owed by related parties	$ 0	$ 0	$ 0
Members of the audit and corporate practices committee [member]
Disclosure of transactions between related parties [line items]
compensation paid	5,300,000
Directors and other key management personnel [member]
Disclosure of transactions between related parties [line items]
compensation paid	$ 70,100,000

Related Parties - Summary of Tr

Related Parties - Summary of Transactions with Related Parties (Detail) - MXN ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of transactions between related parties [abstract]
Construction services, purchases of materials, inventories and property, plant and equipment	$ 7,211,960	$ 11,030,944	$ 9,917,280
Rent of towers	6,168,592	5,326,366	4,748,503
Insurance premiums, fees paid for administrative and operating services, brokerage services and others	4,134,380	4,135,578	4,118,469
Other services	1,864,017	2,802,667	1,899,818
Investments and expenses	19,378,949	23,295,555	20,684,070
Revenues services	679,220	416,047	411,076
Sales of equipment	1,296,204	2,313,840	2,679,591
Revenues	$ 1,975,424	$ 2,729,887	$ 3,090,667

Related Parties - Summary of _2

Related Parties - Summary of Transactions with Related Parties (Parenthetical) (Detail) - MXN ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Grupo Carso, SAB de CV [member]
Disclosure of transactions between related parties [line items]
Materials purchased from subsidiaries	$ 5,622,791	$ 9,829,991	$ 9,547,530
Network maintenance service cost	778,191	789,253	812,247
Associates [member]
Disclosure of transactions between related parties [line items]
Software service expense	13,784	15,695	705,074
Seguros Inbursa SA and Fianzas Guardiana Inbursa, SA [member]
Disclosure of transactions between related parties [line items]
Insurance premium	$ 2,541,703	$ 3,330,038	$ 2,406,058

Derivative Financial Instrume_3

Derivative Financial Instruments - Additional Information (Details) (Detail) - MXN ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of detailed information about financial instruments [line items]
changes in fair value of derivative financial instruments gain (loss)	$ (4,686,407)	$ 8,192,567	$ (9,622,233)
Derivatives [member] | Debt securities [member]
Disclosure of detailed information about financial instruments [line items]
weighted-average interest rate	4.10%	4.00%	3.70%

Derivative Financial Instrume_4

Derivative Financial Instruments - Schedule of Derivative Financial Instruments Contracted (Detail) € in Thousands, $ in Thousands, $ in Thousands, ¥ in Millions, £ in Millions, SFr in Millions, R$ in Millions	Dec. 31, 2018MXN ($)	Dec. 31, 2018USD ($)	Dec. 31, 2018BRL (R$)	Dec. 31, 2018EUR (€)	Dec. 31, 2018GBP (£)	Dec. 31, 2018JPY (¥)	Dec. 31, 2017MXN ($)	Dec. 31, 2017USD ($)	Dec. 31, 2017BRL (R$)	Dec. 31, 2017EUR (€)	Dec. 31, 2017CHF (SFr)	Dec. 31, 2017GBP (£)	Dec. 31, 2017JPY (¥)
Disclosure of detailed information about financial instruments [line items]
Fair value, Asset	$ 5,287,548	$ 269,000					$ 8,037,384
Fair value, Liabilities	(17,107,579)						(14,359,460)
Non-current liability	(3,567,863)	(181,000)					(3,756,921)
Total current liability	(13,539,716)	(688,000)					(10,602,539)
Swaps US Dollar-Mexican peso [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount, Asset		3,490,000						$ 2,800,000
Fair value, Asset	2,058,831						4,766,102
Swaps Yen-US Dollar [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount, Asset | ¥						¥ 13,000							¥ 13,000
Fair value, Asset	581,948						521,270
Forwards US Dollar-Mexican peso [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount, Asset								1,744,000
Fair value, Asset							1,600,666
Notional amount, Liabilities		977,000
Fair value, Liabilities		(772,704)
Forwards US Dollar - Brazilian real [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount, Asset		150,000						100,000
Fair value, Asset	126,287						44,280
Swaps Swiss Franc-US Dollar [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount, Asset | SFr											SFr 475
Fair value, Asset							178,710
Swaps Euro-Brazilianreal [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount, Asset | R$			R$ 300						R$ 450
Fair value, Asset	1,080,552						359,671
Interest rate swaps in Mexican peso [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount, Asset							200,000
Fair value, Asset							916
Forwards Brazilian Real - US Dollar [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount, Asset | R$			R$ 2823
Fair value, Asset	1,107,630
Forwards Euro- Brazilian real [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount, Asset | €				€ 150,000						€ 400,000
Fair value, Asset	123,005									330,427
Forwards US Dollar - Swiss franc [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount, Asset | SFr											SFr 75
Fair value, Asset							121,981
Forwards Euro-US Dollar [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount, Asset | €				710,000						204,000
Fair value, Asset	209,295									113,361
Notional amount, Liabilities | €				950,000
Fair value, Liabilities	(333,586)
Swaps Dollar- Euro [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount, Liabilities		$ 2,025,000						$ 2,092,000
Fair value, Liabilities	(5,114,863)						(8,340,970)
Swaps Pound sterling-Euro [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount, Liabilities | £					£ 740							£ 740
Fair value, Liabilities	(4,027,312)						(3,376,091)
Swap Pound sterling-USDollar [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount, Liabilities | £					£ 2,010							£ 2,010
Fair value, Liabilities	(5,836,607)						(1,676,636)
Call spread option [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount, Liabilities | €										750,000
Fair value, Liabilities							(48,422)
Put option [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount, Liabilities | €				374,000						374,000
Fair value, Liabilities	(988,669)						(482,645)
Call spread option [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount, Liabilities | €				€ 3,000,000						€ 3,000,000
Fair value, Liabilities	$ (33,838)						$ (434,696)

Derivative Financial Instrume_5

Derivative Financial Instruments - Summary of Maturities of Notional Amount of Derivatives (Detail) € in Millions, ¥ in Millions, ¥ in Millions, £ in Millions, R$ in Millions, $ in Millions	Dec. 31, 2018USD ($)	Dec. 31, 2018BRL (R$)	Dec. 31, 2018EUR (€)	Dec. 31, 2018GBP (£)	Dec. 31, 2018JPY (¥)	Dec. 31, 2018CNY (¥)	Dec. 31, 2017USD ($)	Dec. 31, 2017BRL (R$)	Dec. 31, 2017EUR (€)	Dec. 31, 2017GBP (£)	Dec. 31, 2017JPY (¥)
Swaps US Dollar-Mexican peso [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount, Asset | $	$ 3,490						$ 2,800
Swaps Yen-US Dollar [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount, Asset | ¥					¥ 13,000						¥ 13,000
Swaps Euro-Brazilianreal [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount, Asset | R$		R$ 300						R$ 450
Forwards Brazilian Real - US Dollar [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount, Asset | R$		2,823
Forwards Euro- Brazilian real [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount, Asset | €			€ 150						€ 400
Forwards US Dollar - Brazilian real [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount, Asset | $	150						100
Forwards Euro-US Dollar [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount, Asset | €			710						204
Notional amount, Liabilities | €			950
Swaps Dollar- Euro [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount, Liabilities | $	2,025						2,092
Swaps Pound sterling-Euro [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount, Liabilities | £				£ 740						£ 740
Swap Pound sterling-USDollar [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount, Liabilities | £				2,010						£ 2,010
Forwards US Dollar-Mexican peso [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount, Asset | $							$ 1,744
Notional amount, Liabilities | $	977
Put option [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount, Liabilities | €			374						374
Call spread option [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount, Liabilities | €			3,000						€ 3,000
2019 [member] | Swaps Euro-Brazilianreal [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount, Asset | €			300
2019 [member] | Forwards Brazilian Real - US Dollar [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount, Asset | R$		1,680
2019 [member] | Forwards Euro- Brazilian real [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount, Asset | €			150
2019 [member] | Forwards US Dollar - Brazilian real [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount, Asset | $	150
2019 [member] | Forwards Euro-US Dollar [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount, Asset | €			710
Notional amount, Liabilities | €			950
2019 [member] | Swaps Dollar- Euro [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount, Liabilities | $	25
2019 [member] | Forwards US Dollar-Mexican peso [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount, Liabilities | $	977
2020 [member] | Swap Pound sterling-USDollar [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount, Liabilities | £				550
2020 [member] | Call spread option [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount, Liabilities | €			3,000
2021 [member] | Forwards Brazilian Real - US Dollar [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount, Asset | R$		R$ 1143
2022 [member] | Swaps US Dollar-Mexican peso [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount, Asset | $	1,600
2023 and Thereafter [member] | Swaps US Dollar-Mexican peso [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount, Asset | $	1,890
2023 and Thereafter [member] | Swaps Yen-US Dollar [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount, Asset | ¥						¥ 13,000
2023 and Thereafter [member] | Swaps Dollar- Euro [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount, Liabilities | $	$ 2,000
2023 and Thereafter [member] | Swaps Pound sterling-Euro [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount, Liabilities | £				740
2023 and Thereafter [member] | Swap Pound sterling-USDollar [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount, Liabilities | £				£ 1,460
2023 and Thereafter [member] | Put option [member]
Disclosure of detailed information about financial instruments [line items]
Notional amount, Liabilities | €			€ 374

Inventories, Net - Summary of A

Inventories, Net - Summary of Analysis of Inventories (Detail) $ in Thousands, $ in Millions	Dec. 31, 2018MXN ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017MXN ($)
Classes of current inventories [abstract]
Mobile phones, accessories, computers, TVs, cards and other materials	$ 43,723,492		$ 42,262,511
Less: Reserve for obsolete and slow-moving inventories	(3,418,130)		(3,452,946)
Total	$ 40,305,362	$ 2,048	$ 38,809,565

Inventories, net - Additional I

Inventories, net - Additional Information (Details) (Detail) - MXN ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of inventories [abstract]
Cost of inventories recognized in cost of sales	$ 180,013,986	$ 170,154,336	$ 172,495,376

Other Assets, Net - Summary of

Other Assets, Net - Summary of Analysis of Other Assets (Detail) $ in Thousands, $ in Millions	Dec. 31, 2018MXN ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017MXN ($)
Current portion:
Advances to suppliers (different from PP&E and inventories)	$ 12,931,247		$ 9,536,654
Prepaid insurance	949,590		683,091
Costs of mobile equipment and computers associated with deferred revenues	599,628		6,182,010
Other	815,728		950,991
Other current assets	15,296,193	$ 777	17,352,746
Non-current portion:
Recoverable taxes	11,514,455		12,249,372
Prepayments for the use of fiber optics	3,985,216		4,361,668
Prepaid expenses and judicial deposits	26,961,930		25,926,436
Total	$ 42,461,601		$ 42,537,476

Other assets, net - Additional

Other assets, net - Additional Information (Details) (Detail) - MXN ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Other assets [member]
Disclosure of other assets [line items]
Amortization expense for other assets	$ 798,243	$ 620,680	$ 1,340,609

Other Assets, Net - Summary o_2

Other Assets, Net - Summary of Analysis of Other Assets (Parenthetical) (Detail) - MXN ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Disclosure of other assets [abstract]
Judicial deposits	$ 18,172,342	$ 20,288,382

Property, Plant and Equipment_3

Property, Plant and Equipment, Net - Schedule of Property, Plant and Equipment, Net (Detail) $ in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2018MXN ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017MXN ($)	Dec. 31, 2016MXN ($)
Disclosure of detailed information about property, plant and equipment [line items]
Beginning balance	$ 676,343,198		$ 701,190,066	$ 573,528,878
Additions	240,263,874		193,815,932	233,591,696
Retirements	(106,977,930)		(72,079,914)	(92,981,332)
Business combinations	143,016		746,007	1,963,996
Effect of translation of foreign subsidiaries	(40,655,711)		(12,122,813)	112,749,172
Depreciation of the year	(129,115,727)		(135,206,080)	(127,662,344)
Ending balance	640,000,720	$ 32,516	676,343,198	701,190,066
Cost [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning balance	1,303,278,914		1,256,341,372	861,840,855
Additions	240,263,874		193,815,932	233,591,696
Retirements	(140,581,001)		(99,444,894)	(121,078,982)
Business combinations	143,016		746,007	1,963,996
Effect of translation of foreign subsidiaries	(117,432,346)		(48,179,503)	280,023,807
Ending balance	1,285,672,457		1,303,278,914	1,256,341,372
Cost [member] | Network in operation in operation and equipment [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning balance	989,665,946		971,276,013	641,384,702
Additions	68,900,443		78,272,882	101,794,197
Retirements	(1,610,246)		(21,657,715)	(8,963,076)
Business combinations	128,246		599,306	1,873,445
Effect of translation of foreign subsidiaries	(87,888,453)		(38,824,540)	235,186,745
Ending balance	969,195,936		989,665,946	971,276,013
Cost [member] | Land and buildings [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning balance	62,584,189		62,135,411	54,794,386
Additions	4,429,433		2,858,996	2,900,511
Retirements	(3,987,671)		(415,219)	(2,845,298)
Business combinations	8,874		27,686	3,839
Effect of translation of foreign subsidiaries	(5,904,499)		(2,022,685)	7,281,973
Ending balance	57,130,326		62,584,189	62,135,411
Cost [member] | Other assets [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning balance	150,315,807		144,927,016	106,468,602
Additions	25,268,252		19,287,525	24,368,918
Retirements	(13,377,798)		(8,112,571)	(10,717,096)
Business combinations	2,578		80,734	69,937
Effect of translation of foreign subsidiaries	(12,399,702)		(5,866,897)	24,736,655
Ending balance	149,809,137		150,315,807	144,927,016
Cost [member] | Construction in process and advances plant suppliers [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning balance	74,121,374		49,719,884	38,850,776
Additions	92,285,397		66,383,381	70,517,319
Retirements	(76,978,798)		(41,279,573)	(70,911,593)
Business combinations	1,379		34,705	11,255
Effect of translation of foreign subsidiaries	(8,336,823)		(737,023)	11,252,127
Ending balance	81,092,529		74,121,374	49,719,884
Cost [member] | Spare parts for operation of the network [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning balance	26,591,598		28,283,048	20,342,389
Additions	49,380,349		27,013,148	34,010,751
Retirements	(44,626,488)		(27,979,816)	(27,641,919)
Business combinations	1,939		3,576	5,520
Effect of translation of foreign subsidiaries	(2,902,869)		(728,358)	1,566,307
Ending balance	28,444,529		26,591,598	28,283,048
Accumulated depreciation [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning balance	(626,935,716)		(555,151,306)	(288,311,977)
Retirements	33,603,071		27,364,980	28,097,650
Effect of translation of foreign subsidiaries	76,776,635		36,056,690	(167,274,635)
Depreciation of the year	(129,115,727)		(135,206,080)	(127,662,344)
Ending balance	(645,671,737)		(626,935,716)	(555,151,306)
Accumulated depreciation [member] | Network in operation in operation and equipment [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning balance	(552,345,509)		(495,887,086)	(236,731,728)
Retirements	28,712,096		21,214,724	1,968,376
Effect of translation of foreign subsidiaries	67,907,227		32,860,339	(153,147,349)
Depreciation of the year	(104,279,361)		(110,533,486)	(107,976,385)
Ending balance	(560,005,547)		(552,345,509)	(495,887,086)
Accumulated depreciation [member] | Other assets [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning balance	(63,359,529)		(48,459,697)	(47,057,084)
Retirements	2,418,837		4,572,509	25,099,710
Effect of translation of foreign subsidiaries	6,579,983		2,251,958	(10,396,438)
Depreciation of the year	(22,172,785)		(21,724,299)	(16,105,885)
Ending balance	(76,533,494)		(63,359,529)	(48,459,697)
Accumulated depreciation [member] | Spare parts for operation of the network [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning balance	(575,393)		(323,201)	44,423
Retirements	160,696		9,205	54,280
Effect of translation of foreign subsidiaries	131,429		4,339	(20,896)
Depreciation of the year	(38,479)		(265,736)	(401,008)
Ending balance	(321,747)		(575,393)	(323,201)
Accumulated depreciation [member] | Buildings [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning balance	(10,655,285)		(10,481,322)	(4,567,588)
Retirements	2,311,442		1,568,542	975,284
Effect of translation of foreign subsidiaries	2,157,996		940,054	(3,709,952)
Depreciation of the year	(2,625,102)		(2,682,559)	(3,179,066)
Ending balance	$ (8,810,949)		$ (10,655,285)	$ (10,481,322)

Property, Plant and Equipment_4

Property, Plant and Equipment, net - Additional Information (Details) (Detail) R$ in Thousands, $ in Thousands, $ in Thousands	Oct. 20, 2017MXN ($)Transponder	Dec. 31, 2018MXN ($)	Dec. 31, 2018BRL (R$)	Dec. 31, 2017MXN ($)	Dec. 31, 2017BRL (R$)	Oct. 20, 2017USD ($)
Disclosure of detailed information about property, plant and equipment [line items]
Methods used to determine stage of completion of construction in progress		The completion period of construction in progress is variable and depends upon the type of plant and equipment under construction.
Estimated useful life of property, plant and equipment decription		Seven years
Estimated useful life of property, plant and equipment		7
Property, plant and equipment [member]
Disclosure of detailed information about property, plant and equipment [line items]
Capitalized interest amortization period		7
Star One D2 satellite [member] | Star one [member]
Disclosure of detailed information about property, plant and equipment [line items]
Property, plant and equipment, investment capitalized		$ 2,896,399	R$ 551528	$ 916,240	R$ 153179
Star One D2 satellite [member] | Star one [member] | Space Systems Loral [member]
Disclosure of detailed information about property, plant and equipment [line items]
Number of transponders | Transponder	52
Network Capacity	20
Estimated cost of project	$ 6,391,104					$ 323,000
Land and buildings and other equipment [member] | Claro Brasil [member]
Disclosure of detailed information about property, plant and equipment [line items]
Property, plant and equipment, pledged in guarantee of legal proceedings | $		$ 3,166,882		$ 3,521,082

Property, Plant and Equipment_5

Property, Plant and Equipment, Net - Schedule of Property, Plant and Equipment, Net Under Capital Leases (Detail) $ in Thousands, $ in Millions	Dec. 31, 2018MXN ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017MXN ($)	Dec. 31, 2016MXN ($)	Dec. 31, 2015MXN ($)
Disclosure of detailed information about property, plant and equipment [line items]
Property, plant and equipment	$ 640,000,720	$ 32,516	$ 676,343,198	$ 701,190,066	$ 573,528,878
Cost [member]
Disclosure of detailed information about property, plant and equipment [line items]
Property, plant and equipment	1,285,672,457		1,303,278,914	1,256,341,372	861,840,855
Accumulated depreciation [member]
Disclosure of detailed information about property, plant and equipment [line items]
Property, plant and equipment	(645,671,737)		(626,935,716)	$ (555,151,306)	$ (288,311,977)
Property, plant and equipment under capital leases [member]
Disclosure of detailed information about property, plant and equipment [line items]
Property, plant and equipment	4,240,440		4,641,518
Property, plant and equipment under capital leases [member] | Cost [member]
Disclosure of detailed information about property, plant and equipment [line items]
Property, plant and equipment	7,770,681		8,116,532
Property, plant and equipment under capital leases [member] | Accumulated depreciation [member]
Disclosure of detailed information about property, plant and equipment [line items]
Property, plant and equipment	$ 3,530,241		$ 3,475,014

Property, Plant and Equipment_6

Property, Plant and Equipment, Net - Schedule of Relevant Information Related to Computation of Capitalized Borrowing Costs (Detail) - MXN ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of detailed information about property, plant and equipment [line items]
Capitalized interest	$ 2,020,288	$ 2,875,034	$ 2,861,307
Capitalization rate	4.31%	4.30%
Property, plant and equipment [member]
Disclosure of detailed information about property, plant and equipment [line items]
Amount invested in the acquisition of qualifying assets	$ 45,456,630	$ 49,642,370	52,974,400
Capitalized interest	$ 2,020,288	$ 2,875,034	$ 2,861,307
Capitalization rate	4.40%	5.80%	5.40%

Intangible Assets, Net and Go_3

Intangible Assets, Net and Goodwill - Summary of Analysis of Intangible Assets (Detail) - MXN ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]
Amortization of the year	$ (25,798,610)	$ (24,348,182)	$ (19,522,968)
Licenses and rights of use [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]
Balance at beginning of year	113,304,386	116,031,264	90,449,251
Acquisitions	4,227,244	12,347,051	9,129,949
Acquisitions in business combinations		53,923	360,144
Disposals and other	502,397	(792,894)	1,269,478
Amortization of the year	(11,347,089)	(11,879,489)	(10,255,271)
Effect of translation of foreign subsidiaries	(3,388,543)	(2,455,469)	25,077,713
Balance at end of year	103,298,395	113,304,386	116,031,264
Licenses and rights of use [member] | Cost [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]
Balance at beginning of year	247,413,824	242,739,362	175,295,775
Acquisitions	4,227,244	12,347,051	9,129,949
Acquisitions in business combinations		53,923	360,144
Disposals and other	1,508,274	(1,037,458)	1,269,478
Effect of translation of foreign subsidiaries	(19,670,368)	(6,689,054)	56,684,016
Balance at end of year	233,478,974	247,413,824	242,739,362
Licenses and rights of use [member] | Accumulated depreciation [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]
Balance at beginning of year	(134,109,438)	(126,708,098)	(84,846,524)
Disposals and other	(1,005,877)	244,564
Amortization of the year	(11,347,089)	(11,879,489)	(10,255,271)
Effect of translation of foreign subsidiaries	16,281,825	4,233,585	(31,606,303)
Balance at end of year	(130,180,579)	(134,109,438)	(126,708,098)
Trademarks [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]
Balance at beginning of year	9,937,807	12,566,893	11,300,306
Acquisitions	159,958	127,823
Acquisitions in business combinations	6,631	82,868	101,655
Disposals and other		4,660	(13,820)
Amortization of the year	(4,973,602)	(3,179,461)	(330,576)
Effect of translation of foreign subsidiaries	(463,589)	335,024	1,509,328
Balance at end of year	4,667,205	9,937,807	12,566,893
Trademarks [member] | Cost [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]
Balance at beginning of year	28,779,212	27,789,150	22,824,013
Acquisitions	159,958	127,823
Acquisitions in business combinations	6,631	82,868	101,655
Disposals and other		(29,804)	(13,820)
Effect of translation of foreign subsidiaries	(738,635)	809,175	4,877,302
Balance at end of year	28,207,166	28,779,212	27,789,150
Trademarks [member] | Accumulated depreciation [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]
Balance at beginning of year	(18,841,405)	(15,222,257)	(11,523,707)
Disposals and other		34,464
Amortization of the year	(4,973,602)	(3,179,461)	(330,576)
Effect of translation of foreign subsidiaries	275,046	(474,151)	(3,367,974)
Balance at end of year	(23,539,961)	(18,841,405)	(15,222,257)
Customer relationships [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]
Balance at beginning of year	10,856,219	13,810,434	14,431,532
Acquisitions	74,637
Acquisitions in business combinations	15,556	512,667	1,904,503
Amortization of the year	(3,754,312)	(3,769,777)	(3,231,518)
Effect of translation of foreign subsidiaries	(410,569)	302,895	705,917
Balance at end of year	6,781,531	10,856,219	13,810,434
Customer relationships [member] | Cost [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]
Balance at beginning of year	26,985,714	26,245,508	18,394,407
Acquisitions	74,637
Acquisitions in business combinations	15,556	512,667	1,904,503
Disposals and other		(882,338)
Effect of translation of foreign subsidiaries	(1,532,839)	1,109,877	5,946,598
Balance at end of year	25,543,068	26,985,714	26,245,508
Customer relationships [member] | Accumulated depreciation [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]
Balance at beginning of year	(16,129,495)	(12,435,074)	(3,962,875)
Disposals and other		882,338
Amortization of the year	(3,754,312)	(3,769,777)	(3,231,518)
Effect of translation of foreign subsidiaries	1,122,270	(806,982)	(5,240,681)
Balance at end of year	(18,761,537)	(16,129,495)	(12,435,074)
Software licenses [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]
Balance at beginning of year	7,240,437	7,751,056	6,358,170
Acquisitions	2,004,550	3,351,200	3,812,881
Acquisitions in business combinations	3,006		18,504
Disposals and other	1,772,238	(485,449)
Amortization of the year	(3,491,629)	(3,699,363)	(3,469,461)
Effect of translation of foreign subsidiaries	(924,147)	322,993	1,030,962
Balance at end of year	6,604,455	7,240,437	7,751,056
Software licenses [member] | Cost [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]
Balance at beginning of year	15,055,598	12,874,796	8,782,768
Acquisitions	2,004,550	3,351,200	3,854,066
Acquisitions in business combinations	3,006		26,871
Disposals and other	(905,610)	(1,698,118)	(829,680)
Effect of translation of foreign subsidiaries	(1,848,286)	527,720	1,040,771
Balance at end of year	14,309,258	15,055,598	12,874,796
Software licenses [member] | Accumulated depreciation [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]
Balance at beginning of year	(7,815,161)	(5,123,740)	(2,424,598)
Acquisitions			(41,185)
Acquisitions in business combinations			(8,367)
Disposals and other	2,677,848	1,212,669	829,680
Amortization of the year	(3,491,629)	(3,699,363)	(3,469,461)
Effect of translation of foreign subsidiaries	924,139	(204,727)	(9,809)
Balance at end of year	(7,704,803)	(7,815,161)	(5,123,740)
Content rights [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]
Balance at beginning of year	2,200,777	2,209,799	2,205,781
Acquisitions	850,779	2,099,084	2,242,556
Disposals and other		(258,795)	(218,669)
Amortization of the year	(2,231,978)	(1,820,092)	(2,236,141)
Effect of translation of foreign subsidiaries	(33,461)	(29,219)	216,272
Balance at end of year	786,117	2,200,777	2,209,799
Content rights [member] | Cost [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]
Balance at beginning of year	6,717,442	4,876,298	2,634,527
Acquisitions	850,779	2,099,084	2,242,556
Disposals and other		(63,137)	(217,057)
Effect of translation of foreign subsidiaries	(18,512)	(194,803)	216,272
Balance at end of year	7,549,709	6,717,442	4,876,298
Content rights [member] | Accumulated depreciation [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]
Balance at beginning of year	(4,516,665)	(2,666,499)	(428,746)
Disposals and other		(195,658)	(1,612)
Amortization of the year	(2,231,978)	(1,820,092)	(2,236,141)
Effect of translation of foreign subsidiaries	(14,949)	165,584
Balance at end of year	(6,763,592)	(4,516,665)	(2,666,499)
Intangibles, net [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]
Balance at beginning of year	143,539,626	152,369,446	124,745,040
Acquisitions	7,317,168	17,925,158	15,185,386
Acquisitions in business combinations	25,193	649,458	2,384,806
Disposals and other	2,274,635	(1,532,478)	1,036,989
Amortization of the year	(25,798,610)	(24,348,182)	(19,522,967)
Effect of translation of foreign subsidiaries	(5,220,309)	(1,523,776)	28,540,192
Balance at end of year	122,137,703	143,539,626	152,369,446
Goodwill [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]
Balance at beginning of year	151,463,232	152,632,635	137,113,716
Acquisitions	1,455
Acquisitions in business combinations	333,284	951,348	3,953,023
Disposals and other	(1,094,861)	(134,525)	(356,832)
Effect of translation of foreign subsidiaries	(5,136,613)	(1,986,226)	11,922,728
Balance at end of year	$ 145,566,497	$ 151,463,232	$ 152,632,635

Intangible Assets, Net and Go_4

Intangible Assets, Net and Goodwill - Summary of Aggregate Carrying Amount of Goodwill (Detail) $ in Thousands, $ in Millions	Dec. 31, 2018MXN ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017MXN ($)	Dec. 31, 2016MXN ($)
Disclosure of carrying value of goodwill [line items]
Goodwill	$ 145,566,497	$ 7,396	$ 151,463,232	$ 152,632,635
Europe [member]
Disclosure of carrying value of goodwill [line items]
Goodwill	53,066,729		53,143,542
Brazil [member]
Disclosure of carrying value of goodwill [line items]
Goodwill	21,388,124		24,708,740
Puerto Rico [member]
Disclosure of carrying value of goodwill [line items]
Goodwill	17,463,394		17,463,394
Dominican Republic [member]
Disclosure of carrying value of goodwill [line items]
Goodwill	14,186,723		14,186,723
Mexico [member]
Disclosure of carrying value of goodwill [line items]
Goodwill	12,770,381		13,981,033
Ecuador [member]
Disclosure of carrying value of goodwill [line items]
Goodwill	9,856,601		9,852,912
Peru [member]
Disclosure of carrying value of goodwill [line items]
Goodwill	3,086,981		3,958,110
El Salvador [member]
Disclosure of carrying value of goodwill [line items]
Goodwill	2,576,214		2,834,134
Chile [member]
Disclosure of carrying value of goodwill [line items]
Goodwill	2,510,577		2,510,577
Colombia [member]
Disclosure of carrying value of goodwill [line items]
Goodwill	2,155,385		2,155,385
Other countries [member]
Disclosure of carrying value of goodwill [line items]
Goodwill	$ 6,505,388		$ 6,668,682

Intangible Assets, Net and Go_5

Intangible Assets, Net and Goodwill - Additional Information (Detail) € in Thousands, S/ in Thousands, R$ in Thousands, $ in Thousands, $ in Thousands, in Thousands

Jul. 14, 2017MXN ($)

Feb. 24, 2017MXN ($)

May 26, 2016MXN ($)

May 26, 2016PEN (S/)

Jan. 31, 2017MXV ( )

Jul. 31, 2016MXN ($)

Jul. 31, 2016USD ($)

May 30, 2016MXN ($)

May 30, 2016EUR (€)

Feb. 28, 2016MXN ($)

Dec. 31, 2018MXN ($)

Dec. 31, 2018BRL (R$)

Dec. 31, 2017MXN ($)

Dec. 31, 2016MXN ($)

Feb. 28, 2016USD ($)

Disclosure of intangible assets and goodwill [line items]

Amortization of intangible assets

$ 25,798,610

$ 24,348,182

$ 19,522,968

Telekom Austria [member]

Disclosure of intangible assets and goodwill [line items]

Amount paid for license

$ 410,713

€ 18,837

700 MHz frequency band [member] | Renewal of license [member]

Disclosure of intangible assets and goodwill [line items]

Amount paid for license |

3,592,034

Paraguay subsidiary [member] | 30 Mhz spectrum [member]

Disclosure of intangible assets and goodwill [line items]

Total consideration

$ 830,719

$ 46,000

Radiomovil Dipsa S A de C V (Telcel) [member] | Acquired through auction [member]

Disclosure of intangible assets and goodwill [line items]

Amount paid for license

$ 2,098,060

Mtel Bulgaria [member]

Disclosure of intangible assets and goodwill [line items]

Amount paid for license

$ 135,441

€ 6,212

Radiomovil dipsa [member] | Eight point four Mega Hertz frequency band [member] | Renewal of license [member]

Disclosure of intangible assets and goodwill [line items]

Amount paid for license

$ 917,431

Radiomovil dipsa [member] | Two point five Giga Hertz frequency band [member] | Renewal of license [member]

Disclosure of intangible assets and goodwill [line items]

Amount paid for license

$ 5,305,498

Peru subsidiary [member] | 700 MHz frequency band [member] | Spectrum in public auction [member]

Disclosure of intangible assets and goodwill [line items]

Amount paid for license

$ 5,627,316

S/ 1,002,523

Frequency band expiration year

Dec. 31, 2036

Dec. 31, 2036

Dominican Republic [member]

Disclosure of intangible assets and goodwill [line items]

Amount paid for license

$ 709,829

R$ 1831427

Estimated useful life of intangible assets

11 years

11 years

Paraguay Puerto Rico Europe Argentina and other countries [member]

Disclosure of intangible assets and goodwill [line items]

Amount paid for license

$ 3,517,415

Ecuador [member] | Ecuador Telecom, S.A. [member] | License to operate TV [member]

Disclosure of intangible assets and goodwill [line items]

Amount paid for license

$ 27,700

$ 1,500

Chile Europe uruguay and other countries [member] | Other licenses [member]

Disclosure of intangible assets and goodwill [line items]

Amount paid for license

$ 2,532,088

Business Combinations, Acquis_3

Business Combinations, Acquisitions, Sale and Non-controlling Interest - Additional Information (Details) (Detail) $ in Thousands

1 Months Ended

12 Months Ended

Feb. 28, 2017MXN ($)

Jan. 31, 2017MXN ($)

Jan. 31, 2017USD ($)

Nov. 30, 2016MXN ($)

Aug. 31, 2016

Jul. 31, 2016

May 31, 2016MXN ($)

May 31, 2016USD ($)

Jan. 31, 2016MXN ($)

Dec. 31, 2014MXN ($)

Dec. 31, 2018MXN ($)

Dec. 31, 2017MXN ($)

Dec. 31, 2016MXN ($)

Sep. 30, 2016MXN ($)

May 31, 2016USD ($)

Disclosure of detailed information about business combination [line items]

Business acquisitions controlling interest

99.99%

Amount paid for business acquisition

$ 1,088,668,000

Goodwill amount recognized

$ 1,046,253,000

$ 1,251,464

Tracfone Wireless Inc [member]

Disclosure of detailed information about business combination [line items]

Additional business acquisition

1.80%

1.80%

Percentage of capital stock

100.00%

100.00%

Amount paid for business acquisition

$ 2,300,553,000

$ 124,673

Gain loss on equity transactions

0

Olo and TVS [member]

Disclosure of detailed information about business combination [line items]

Amount paid for business acquisition

$ 1,854,379,000

$ 102,343

Goodwill amount recognized

$ 329,366,000

$ 188,452,000

$ 1,454,333,000

Percentage of capital stock

100.00%

100.00%

Amount paid from Company

$ 2,079,095,000

$ 94,789

$ 152,214,000

$ 7,554

Other Entities [member]

Disclosure of detailed information about business combination [line items]

Goodwill amount recognized

260,355,000

Net of cash paid

3,249,164,000

Telekom Austria [member]

Disclosure of detailed information about business combination [line items]

Amount paid for business acquisition

$ 582,931,000

Goodwill amount recognized

$ 200,973,000

Percentage of outstanding common stock sold

0.89%

7.80%

Percentage of stake reduced

51.00%

Cash received from sale of outstanding common stock

$ 6,323,336,000

Name of acquiree

Atlant Telecom (Atlant) and its subsidiary TeleSet

Description of acquiree

Leading privately owned fixed-line operators in Belarus offering fixed-line broadband, IPTV and cable TV as well as a video and audio library.

Acquisition of fixed line operator

100.00%

Telekom Austria [member] | Metronet [member]

Disclosure of detailed information about business combination [line items]

Amount paid for business acquisition

$ 1,550,534,000

Goodwill amount recognized

$ 502,574,000

Acquisition of fixed line operator

97.68%

Telekom Austria [member] | Top of range [member]

Disclosure of detailed information about business combination [line items]

Percentage of sale reduced overall shareholding

59.70%

Telekom Austria [member] | Bottom of range [member]

Disclosure of detailed information about business combination [line items]

Percentage of sale reduced overall shareholding

51.89%

Mexican and Brazil subsidiaries [member]

Disclosure of detailed information about business combination [line items]

Additional non-controlling interest acquired

$ 23,881,000

Business Combinations, Acquis_4

Business Combinations, Acquisitions, Sale and Non-controlling Interest - Summary of Selected Financial Data From Statements of Financial Position (Detail) $ in Thousands, $ in Millions	Dec. 31, 2018MXN ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017MXN ($)	Dec. 31, 2016MXN ($)	Dec. 31, 2015MXN ($)
Assets:
Current assets	$ 349,055,524	$ 17,734	$ 342,235,218
Total assets	1,429,223,392	72,613	1,486,211,852	$ 1,515,042,274
Liabilities and equity:
Current liabilities	467,090,889	23,731	413,336,497
Non-current liabilities	716,260,081	36,390	812,241,838
Total liabilities	1,183,350,970	60,121	1,225,578,335	1,244,018,507
Equity attributable to equity holders of the parent	195,995,645	9,958	194,164,312
Non-controlling interest	49,876,777	2,534	66,469,205
Total equity	245,872,422	12,492	260,633,517	$ 271,023,767	$ 160,854,186
Total liabilities and equity	1,429,223,392	$ 72,613	1,486,211,852
Subsidiaries with material non-controlling interests [member]
Assets:
Current assets	29,854,542		29,128,486
Non-current assets	131,407,408		150,225,260
Total assets	161,261,950		179,353,746
Liabilities and equity:
Current liabilities	36,822,034		30,192,384
Non-current liabilities	80,023,800		89,048,150
Total liabilities	116,845,834		119,240,534
Equity attributable to equity holders of the parent	22,621,625		25,808,318
Non-controlling interest	21,794,491		34,304,894
Total equity	44,416,116		60,113,212
Total liabilities and equity	$ 161,261,950		$ 179,353,746

Business Combinations, Acquis_5

Business Combinations, Acquisitions, Sale and Non-controlling Interest - Summary of Selected Financial Data From Statements of Financial Position (Parenthetical) (Detail) $ in Thousands	Dec. 31, 2017MXN ($)
Undated Subordinated Fixed Rate Bond [member]
Disclosure of detailed information about business combination [line items]
Undated subordinated fixed rate bond	$ 14,942,886

Business Combinations, Acquis_6

Business Combinations, Acquisitions, Sale and Non-controlling Interest - Summary of Statements of Comprehensive Income (Detail) $ in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2018MXN ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017MXN ($)	Dec. 31, 2016MXN ($)
Disclosure of detailed information about business combination [line items]
Operating costs and expenses	$ 898,650,510	$ 45,657	$ 921,490,232	$ 865,802,178
Operating income	139,557,171	7,090	100,143,303	109,610,310
Net income	54,516,823	2,770	32,155,333	12,078,739
Total comprehensive income	(12,805,619)	(651)	7,434,083	127,726,244
Distribution of the net profit (loss) to:
Equity holders of the parent	52,566,197	2,670	29,325,921	8,649,427
Non-controllinginterest	1,950,626	100	2,829,412	3,429,312
Net income	54,516,823	2,770	32,155,333	12,078,739
Comprehensive income (loss) for the year attributable to:
Equity holders of the parent	(11,770,227)	(598)	1,201,698	120,974,842
Non-controllinginterest	(1,035,392)	(53)	6,232,385	6,751,402
Total comprehensive income (loss) for the year	(12,805,619)	$ (651)	7,434,083	127,726,244
Subsidiaries with material non-controlling interests [member]
Disclosure of detailed information about business combination [line items]
Operating revenues	100,716,444		93,644,173	85,185,177
Operating costs and expenses	95,984,880		86,920,692	81,590,233
Operating income	4,731,564		6,723,481	3,594,944
Net income	3,809,694		5,656,132	7,065,770
Total comprehensive income	5,047,838		7,737,797	8,450,837
Distribution of the net profit (loss) to:
Equity holders of the parent	1,942,944		2,884,627	3,241,556
Non-controllinginterest	1,866,750		2,771,505	3,824,214
Net income	3,809,694		5,656,132	7,065,770
Comprehensive income (loss) for the year attributable to:
Equity holders of the parent	2,574,397		3,978,263	4,311,801
Non-controllinginterest	2,473,441		3,759,534	4,139,036
Total comprehensive income (loss) for the year	$ 5,047,838		$ 7,737,797	$ 8,450,837

Income Taxes - Summary of Compo

Income Taxes - Summary of Composition of Income Tax Expense (Detail) $ in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2018MXN ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017MXN ($)	Dec. 31, 2016MXN ($)
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Income tax expense	$ 46,477,079	$ 2,361	$ 24,941,511	$ 11,398,856
Mexico [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Current year income tax	28,572,414		16,568,274	14,316,005
Deferred income tax	(2,688,727)		2,582,287	(12,086,232)
Foreign [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Current year income tax	19,898,728		13,524,729	15,367,903
Deferred income tax	$ 694,664		$ (7,733,779)	$ (6,198,820)

Income Taxes - Summary of Defer

Income Taxes - Summary of Deferred Tax Related to Items Recognized in OCI (Detail) - MXN ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Major components of tax expense (income) [abstract]
Remeasurement of defined benefit plans	$ 408,735	$ 3,032,403	$ (7,734,732)
Effect of financial instruments acquired for hedging purposes		(5,337)	(21,046)
Equity investments at fair value	1,613,667	(266,753)	2,858,452
Other	(8,922)		136,879
Deferred tax benefit (expense) recognized in OCI	$ 2,013,480	$ 2,760,313	$ (4,760,447)

Income Taxes - Summary of Recon

Income Taxes - Summary of Reconciliation of Statutory Income Tax Rate in Mexico to Consolidated Effective Income Tax Rate Recognized (Detail)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Statutory income tax rate in Mexico	30.00%	30.00%	30.00%
Impact of non-deductibleand non-taxable items:
Tax inflation effects	7.30%	17.80%	15.90%
Derivatives	0.40%	1.00%	8.00%
Employee benefits	1.30%	2.20%	4.40%
Other	6.30%	2.60%	9.80%
Equity interest in net loss of associated companies			(0.20%)
Dividends received from associates	(0.80%)	(1.20%)	(7.90%)
Foreign subsidiaries and other non-deductible items, net	1.50%	(8.30%)	(10.80%)
Effective tax rate	46.00%	43.70%	48.60%
Mexico [member]
Impact of non-deductibleand non-taxable items:
Effective tax rate	45.30%	53.60%	68.10%
Brazil [member]
Impact of non-deductibleand non-taxable items:
Use of unrecognized tax credits in Brazil		(0.40%)	(0.60%)

Income Taxes - Summary of Analy

Income Taxes - Summary of Analysis of Temporary Differences Giving Rise to Net Deferred Tax Liability (Detail) - MXN ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Net deferred tax assets	$ 86,613,327	$ 104,573,985	$ 98,589,818	$ 69,817,147
Deferred tax expense in net profit for the year	1,994,063	5,151,492	18,285,052
Provisions [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Net deferred tax assets	20,781,421	26,268,666
Deferred tax expense in net profit for the year	1,841,705	1,579,604	1,622,132
Deferred revenues [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Net deferred tax assets	6,866,120	7,461,802
Deferred tax expense in net profit for the year	3,632,051	(965,010)	(12,128)
Tax losses carry forward [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Net deferred tax assets	27,881,491	38,332,408
Deferred tax expense in net profit for the year	(5,833,660)	(323,506)	12,706,245
Property, plant and equipment [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Net deferred tax assets	(11,756,590)	(9,929,129)
Deferred tax expense in net profit for the year	453,493	1,974,753	2,445,783
Inventories [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Net deferred tax assets	2,106,976	2,003,049
Deferred tax expense in net profit for the year	81,270	519,046	(229,571)
Licenses and rights of use [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Net deferred tax assets	(3,896,788)	(2,455,877)
Deferred tax expense in net profit for the year	961,402	348,201	54,182
Employee benefits [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Net deferred tax assets	33,673,874	33,253,071
Deferred tax expense in net profit for the year	1,128,209	1,225,310	3,616,952
Other [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Net deferred tax assets	10,956,823	9,639,995
Deferred tax expense in net profit for the year	$ (270,407)	$ 793,094	$ (1,918,543)

Income Taxes - Summary of Rec_2

Income Taxes - Summary of Reconciliation of Deferred Tax Assets and Liabilities, Net (Detail) $ in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2018MXN ($)	Dec. 31, 2017MXN ($)	Dec. 31, 2016MXN ($)	Dec. 31, 2018MXN ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017MXN ($)	Dec. 31, 2016MXN ($)
Reconciliation of changes in deferred tax liability (asset) [abstract]
Deferred Tax (Liability) Asset Beginning Balance	$ 104,573,985	$ 98,589,818	$ 69,817,147
Deferred tax benefit	1,994,063	5,151,492	18,285,052
Translation effect	(8,854,010)	(1,687,276)	15,273,228
Deferred tax benefit (expense) recognized in OCI	2,013,480	2,760,313	(4,760,447)
Deferred taxes acquired in business combinations	(25,827)	(240,362)	(25,162)
Hyperinflationary effect in Argentina	(4,907,151)
Effect of adoption of IFRS 9 (Note 2ai)	544,628
Effect of adoption of IFRS 15 (Note 2ai)	(8,725,841)
Deferred tax (liability) asset ending balance	86,613,327	104,573,985	98,589,818
Presented in the consolidated statements of financial position as follows:
Deferred income tax assets				$ 111,186,768	$ 5,649	$ 116,571,349	$ 112,651,699
Deferred income tax liabilities				(24,573,441)	$ (1,248)	(11,997,364)	(14,061,881)
Deferred tax assets and liabilities, net	$ 104,573,985	$ 98,589,818	$ 69,817,147	$ 86,613,327		$ 104,573,985	$ 98,589,818

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - MXN ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Statutory income tax rate in Mexico	30.00%	30.00%	30.00%
Effective income tax rate for foreign jurisdiction	31.00%	15.00%	20.00%
Percentage of share with voting right	80.00%
Brazil [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Net operating loss carryforwards	$ 59,695,441
Effective taxable income percentage carryforward	30.00%
Effective taxable income percentage	25.00%
Corporate tax rate	34.00%
Austria [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Net operating loss carryforwards	$ 20,128,833
operating loss carryforward effective tax rate annual limit	75.00%
Mexico [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Accumulated tax loss	$ 6,043,603
Bottom of range [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Statutory tax rates	21.00%
Top of range [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Statutory tax rates	40.00%
CUCA [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Contributed capital account	$ 536,278,717	$ 510,832,194
CUFIN [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Contributed capital account	$ 276,185,284	$ 225,105,342

Income Taxes - Combined Income

Income Taxes - Combined Income Before Taxes and Combined Provision for Taxes (Detail) - MXN ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Major components of tax expense (income) [abstract]
Combined income before taxes	$ 66,314,883	$ 38,286,046	$ 45,697,258
Combined tax provision differences not deducible-not cumulative in the foreign subsidiaries	$ 20,593,392	$ 5,790,950	$ 9,169,083

Income Taxes - Available Tax Lo

Income Taxes - Available Tax Loss Carryforwards Recorded in Deferred Tax Assets (Detail) $ in Thousands	Dec. 31, 2018MXN ($)
Disclosure of tax losses available for carryforward [line items]
Balance of available tax loss carryforwards at December 31, 2018	$ 88,109,766
Tax loss carryforward benefit	27,881,491
Brazil [member]
Disclosure of tax losses available for carryforward [line items]
Balance of available tax loss carryforwards at December 31, 2018	59,695,441
Tax loss carryforward benefit	20,296,450
Austria [member]
Disclosure of tax losses available for carryforward [line items]
Balance of available tax loss carryforwards at December 31, 2018	20,128,833
Tax loss carryforward benefit	5,032,208
Mexico [member]
Disclosure of tax losses available for carryforward [line items]
Balance of available tax loss carryforwards at December 31, 2018	6,043,603
Tax loss carryforward benefit	1,813,081
Colombia [member]
Disclosure of tax losses available for carryforward [line items]
Balance of available tax loss carryforwards at December 31, 2018	2,239,486
Tax loss carryforward benefit	739,030
Nicaragua [member]
Disclosure of tax losses available for carryforward [line items]
Balance of available tax loss carryforwards at December 31, 2018	2,403
Tax loss carryforward benefit	$ 722

Debt - Summary of Short- and Lo

Debt - Summary of Short- and Long-Term Debt (Detail) $ in Thousands, $ in Millions	1 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2018MXN ($)	Dec. 31, 2017MXN ($)	Dec. 31, 2018USD ($)
Disclosure of detailed information about borrowings [line items]
Borrowings		$ 638,922,453	$ 697,884,899
Less: Short-term debt and current portion of long-term debt		96,230,634	51,745,841	$ 4,889
Long-term debt		$ 542,691,819	$ 646,139,058	$ 27,572
Hybrid Notes [member]
Disclosure of detailed information about borrowings [line items]
Borrowings maturity	2073	2073	2073
Borrowings		$ 26,213,095	$ 49,148,975
Lines of credit [member]
Disclosure of detailed information about borrowings [line items]
Borrowings		29,651,000	31,364,000
Less: Short-term debt and current portion of long-term debt		28,852,364	22,714,383
Finance Lease [member]
Disclosure of detailed information about borrowings [line items]
Less: Short-term debt and current portion of long-term debt		12,460	36,962
Line of credit and others [member]
Disclosure of detailed information about borrowings [line items]
Borrowings		29,715,776	31,463,056
U.S. dollars [member]
Disclosure of detailed information about borrowings [line items]
Borrowings		$ 184,089,282	$ 185,060,098
U.S. dollars [member] | Fixed-rate Senior notes interest rate 5.000% maturing 2019 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest rate		5.00%	5.00%	5.00%
Borrowings maturity		2019	2019
Borrowings		$ 14,762,175	$ 14,840,025
U.S. dollars [member] | Fixed-rate Senior notes interest rate 5.500% maturing 2019 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest rate		5.50%	5.50%	5.50%
Borrowings maturity		2019	2019
Borrowings		$ 7,427,972	$ 7,467,145
U.S. dollars [member] | Fixed-rate Senior notes interest rate 5.000% maturing 2020 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest rate		5.00%	5.00%	5.00%
Borrowings maturity		2020	2020
Borrowings		$ 41,822,521	$ 42,043,077
U.S. dollars [member] | Fixed-rate Senior notes interest rate 3.125% maturing 2022 [Member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest rate		3.125%	3.125%	3.125%
Borrowings maturity		2022	2022
Borrowings		$ 31,492,640	$ 31,658,720
U.S. dollars [member] | Fixed-rate Senior notes interest rate 6.375% maturing 2035 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest rate		6.375%	6.375%	6.375%
Borrowings maturity		2035	2035
Borrowings		$ 19,315,420	$ 19,417,282
U.S. dollars [member] | Fixed-rate Senior notes interest rate 6.125% maturing 2037 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest rate		6.125%	6.125%	6.125%
Borrowings maturity		2037	2037
Borrowings		$ 7,267,419	$ 7,305,744
U.S. dollars [member] | Fixed-rate Senior notes interest rate 6.125% maturing 2040 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest rate		6.125%	6.125%	6.125%
Borrowings maturity		2040	2040
Borrowings		$ 39,365,800	$ 39,573,400
U.S. dollars [member] | Fixed Rate Senior Notes Interest Rate 4.375% Maturing 2042 [Member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest rate		4.375%	4.375%	4.375%
Borrowings maturity		2042	2042
Borrowings		$ 22,635,335	$ 22,754,705
U.S. dollars [member] | Lines of credit [member]
Disclosure of detailed information about borrowings [line items]
Borrowings		$ 11,698,885	$ 14,474,350
U.S. dollars [member] | Lines of credit [member] | LIBOR [member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest basis		L + 0.200% and 1.500% - 8.950%	L + 0.200% and 1.500% - 7.250%
Borrowings interest rate adjustment		0.20%	0.20%	0.20%
U.S. dollars [member] | Bottom of range [member] | Lines of credit [member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest rate		1.50%	1.50%	1.50%
Borrowings maturity		2019	2018
U.S. dollars [member] | Top of range [member] | Lines of credit [member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest rate		8.95%	7.25%	8.95%
Borrowings maturity		2021	2019
Mexican pesos [member]
Disclosure of detailed information about borrowings [line items]
Borrowings		$ 68,001,125	$ 70,691,683
Mexican pesos [member] | Domestic Senior Notes Interest Rate 8.110% Maturing 2018 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest rate			8.11%
Borrowings maturity			2018
Borrowings			$ 1,750,000
Mexican pesos [member] | Domestic Senior Notes Interest Rate 8.270% Maturing 2018 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest rate			8.27%
Borrowings maturity			2018
Borrowings			$ 1,160,110
Mexican pesos [member] | Domestic Senior Notes Interest Rate 8.600% Maturing 2020 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest rate		8.60%	8.60%	8.60%
Borrowings maturity		2020	2020
Borrowings		$ 7,000,000	$ 7,000,000
Mexican pesos [member] | Domestic Senior Notes Interest Rate 0.000% Maturing 2025 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest rate		0.00%	0.00%	0.00%
Borrowings maturity		2025	2025
Borrowings		$ 4,629,425	$ 4,409,873
Mexican pesos [member] | Domestic Senior Notes Interest Rate 8.360% Maturing 2037 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest rate		8.36%	8.36%	8.36%
Borrowings maturity		2037	2037
Borrowings		$ 5,000,000	$ 5,000,000
Mexican pesos [member] | Fixed Rate Senior Notes Interest Rate 6.000% Maturing 2019 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest rate		6.00%	6.00%	6.00%
Borrowings maturity		2019	2019
Borrowings		$ 10,000,000	$ 10,000,000
Mexican pesos [member] | Fixed Rate Senior Notes Interest Rate 6.450% Maturing 2022 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest rate		6.45%	6.45%	6.45%
Borrowings maturity		2022	2022
Borrowings		$ 22,500,000	$ 22,500,000
Mexican pesos [member] | Fixed Rate Senior Notes Interest Rate 7.125% Maturing 2024 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest rate		7.125%	7.125%	7.125%
Borrowings maturity		2024	2024
Borrowings		$ 11,000,000	$ 11,000,000
Mexican pesos [member] | Fixed Rate Senior Notes Interest Rate 8.460% Maturing 2036 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest rate		8.46%	8.46%	8.46%
Borrowings maturity		2036	2036
Borrowings		$ 7,871,700	$ 7,871,700
Mexican pesos [member] | Lines of credit [member]
Disclosure of detailed information about borrowings [line items]
Borrowings maturity		2019
Borrowings		$ 4,500,000	$ 12,500,000
Mexican pesos [member] | Lines of credit [member] | Mexican Interbank Rate [member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest basis		TIIE + 0.175%	TIIE + 0.040% - TIIE + 0.175%
Mexican pesos [member] | Bottom of range [member] | Lines of credit [member]
Disclosure of detailed information about borrowings [line items]
Borrowings maturity			2018
Mexican pesos [member] | Bottom of range [member] | Lines of credit [member] | Mexican Interbank Rate [member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest rate adjustment		0.175%	0.04%	0.175%
Mexican pesos [member] | Top of range [member] | Lines of credit [member]
Disclosure of detailed information about borrowings [line items]
Borrowings maturity			2019
Mexican pesos [member] | Top of range [member] | Lines of credit [member] | Mexican Interbank Rate [member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest rate adjustment		0.175%	0.175%	0.175%
Euros [member]
Disclosure of detailed information about borrowings [line items]
Borrowings		$ 236,548,891	$ 263,998,076
Euros [member] | Hybrid Notes [member]
Disclosure of detailed information about borrowings [line items]
Borrowings		$ 12,407,214	$ 34,443,203
Euros [member] | Fixed rate senior notes interest rate 1.000% maturing 2018 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest rate			1.00%
Borrowings maturity			2018
Borrowings			$ 14,252,360
Euros [member] | Fixed rate senior notes interest rate 4.125% maturing 2019 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest rate		4.125%	4.125%	4.125%
Borrowings maturity		2019	2019
Borrowings		$ 22,558,572	$ 23,753,933
Euros [member] | Exchangable bonds interest rate 0.000% maturing 2020 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest rate		0.00%	0.00%	0.00%
Borrowings maturity		2020	2020
Borrowings		$ 64,107,851	$ 67,504,878
Euros [member] | Fixed rate senior notes interest rate 3.000% maturing 2021 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest rate		3.00%	3.00%	3.00%
Borrowings maturity		2021	2021
Borrowings		$ 22,558,572	$ 23,753,933
Euros [member] | Fixed rate senior notes interest rate 3.125% maturing 2021 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest rate		3.125%	3.125%	3.125%
Borrowings maturity		2021	2021
Borrowings		$ 17,568,739	$ 18,727,775
Euros [member] | Fixed rate senior notes interest rate 4.000% maturing 2022 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest rate		4.00%	4.00%	4.00%
Borrowings maturity		2022	2022
Borrowings		$ 18,028,031	$ 19,333,685
Euros [member] | Fixed rate senior notes interest rate 4.750% maturing 2022 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest rate		4.75%	4.75%	4.75%
Borrowings maturity		2022	2022
Borrowings		$ 16,918,929	$ 17,815,450
Euros [member] | Fixed rate senior notes interest rate 3.500% maturing 2023 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest rate		3.50%	3.50%	3.50%
Borrowings maturity		2023	2023
Borrowings		$ 7,132,481	$ 7,594,262
Euros [member] | Fixed rate senior notes interest rate 3.259% maturing 2023 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest rate		3.259%	3.259%	3.259%
Borrowings maturity		2023	2023
Borrowings		$ 16,918,929	$ 17,815,450
Euros [member] | Fixed rate senior notes interest rate 1.500% maturing 2024 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest rate		1.50%	1.50%	1.50%
Borrowings maturity		2024	2024
Borrowings		$ 19,174,786	$ 20,190,843
Euros [member] | Fixed rate senior notes interest rate 1.500% maturing 2026 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest rate		1.50%	1.50%	1.50%
Borrowings maturity		2026	2026
Borrowings		$ 16,918,929	$ 17,815,450
Euros [member] | Fixed rate senior notes interest rate 2.125% maturing 2028 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest rate		2.125%	2.125%	2.125%
Borrowings maturity		2028	2028
Borrowings		$ 14,663,072	$ 15,440,057
Euros [member] | Euro Nc5 series A capital securities interest rate 5.125% maturing 2073 [member] | Hybrid Notes [member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest rate			5.125%
Borrowings maturity			2073
Borrowings			$ 21,378,540
Euros [member] | Euro Nc10 series B capital securities interest rate 6.375% maturing 2073 [member] | Hybrid Notes [member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest rate		6.375%	6.375%	6.375%
Borrowings maturity		2073	2073
Borrowings		$ 12,407,214	$ 13,064,663
Euros [member] | Lines of credit [member]
Disclosure of detailed information about borrowings [line items]
Borrowings maturity		2019
Borrowings		$ 5,526,850
Euros [member] | Bottom of range [member] | Lines of credit [member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest rate		(0.10%)		(0.10%)
Euros [member] | Top of range [member] | Lines of credit [member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest rate		0.00%		0.00%
Pound sterling [member]
Disclosure of detailed information about borrowings [line items]
Borrowings		$ 55,223,526	58,823,089
Pound sterling [member] | Hybrid Notes [member]
Disclosure of detailed information about borrowings [line items]
Borrowings		$ 13,805,881	$ 14,705,772
Pound sterling [member] | Fixed rate senior notes interest rate 5.000% maturing 2026 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest rate		5.00%	5.00%	5.00%
Borrowings maturity		2026	2026
Borrowings		$ 12,550,801	$ 13,368,884
Pound sterling [member] | Fixed rate senior notes interest rate 5.750% maturing 2030 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest rate		5.75%	5.75%	5.75%
Borrowings maturity		2030	2030
Borrowings		$ 16,316,042	$ 17,379,549
Pound sterling [member] | Fixed rate senior notes interest rate 4.948% maturing 2033 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest rate		4.948%	4.948%	4.948%
Borrowings maturity		2033	2033
Borrowings		$ 7,530,481	$ 8,021,330
Pound sterling [member] | Fixed rate senior notes interest rate 4.375% maturing 2041 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest rate		4.375%	4.375%	4.375%
Borrowings maturity		2041	2041
Borrowings		$ 18,826,202	$ 20,053,326
Pound sterling [member] | GBP NC7 capital securities interest rate 6.375% maturing 2073 [member] | Hybrid Notes [member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest rate		6.375%	6.375%	6.375%
Borrowings maturity		2073	2073
Borrowings		$ 13,805,881	$ 14,705,772
Swiss francs [,ember]
Disclosure of detailed information about borrowings [line items]
Borrowings			$ 11,169,748
Swiss francs [,ember] | Fixed rate senior notes interest rate 1.125% maturing 2018 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest rate			1.125%
Borrowings maturity			2018
Borrowings			$ 11,169,748
Brazilian reals [member]
Disclosure of detailed information about borrowings [line items]
Borrowings		$ 32,891,187	$ 20,935,142
Brazilian reals [member] | Debenture 102.900% of CDI maturing 2020 [member]
Disclosure of detailed information about borrowings [line items]
Interbank certificate of deposit interest rate basis		102.900% of CDI	102.900% of CDI
Borrowings maturity		2020	2020
Adjustment of interbank certificate of deposit		102.90%	102.90%
Borrowings		$ 7,619,580	$ 8,972,204
Brazilian reals [member] | Promissory Note 102.400% of CDI maturing 2019 [member]
Disclosure of detailed information about borrowings [line items]
Interbank certificate of deposit interest rate basis		102.400% of CDI	102.400% of CDI
Borrowings maturity		2019	2019
Adjustment of interbank certificate of deposit		102.40%	102.40%
Borrowings		$ 5,079,720	$ 5,981,469
Brazilian reals [member] | Debenture 103.900% of CDI maturing 2019 [member]
Disclosure of detailed information about borrowings [line items]
Interbank certificate of deposit interest rate basis		103.900% of CDI	103.900% of CDI
Borrowings maturity		2019	2019
Adjustment of interbank certificate of deposit		103.90%	103.90%
Borrowings		$ 5,079,720	$ 5,981,469
Brazilian reals [member] | Lines of credit [member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest basis			107% of CDI - TJLP + 3.500% & 3.000% - 9.500%
Borrowings		$ 27,009	$ 4,389,260
Brazilian reals [member] | Lines of credit [member] | Brazil Interbank Deposit Rate [member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest rate adjustment			107.00%
Brazilian reals [member] | Lines of credit [member] | Brazil Long Term Interest Rate [member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest rate adjustment			3.50%
Brazilian reals [member] | Promissory notes 103.205% of CDI maturing 2019 [member]
Disclosure of detailed information about borrowings [line items]
Interbank certificate of deposit interest rate basis		103.205% of CDI
Borrowings maturity		2019
Adjustment of interbank certificate of deposit		103.205%
Borrowings		$ 1,828,699
Brazilian reals [member] | Debenture 104.000% of CDI maturing 2021 [member]
Disclosure of detailed information about borrowings [line items]
Interbank certificate of deposit interest rate basis		104.000% of CDI
Borrowings maturity		2021
Adjustment of interbank certificate of deposit		104.00%
Borrowings		$ 5,587,692
Brazilian reals [member] | Debenture 104.250% of CDI maturing 2021 [member]
Disclosure of detailed information about borrowings [line items]
Interbank certificate of deposit interest rate basis		104.250% of CDI
Borrowings maturity		2021
Adjustment of interbank certificate of deposit		104.25%
Borrowings		$ 7,695,776
Brazilian reals [member] | Bottom of range [member] | Lines of credit [member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest rate		5.00%	3.00%	5.00%
Borrowings maturity		2019	2018
Brazilian reals [member] | Top of range [member] | Lines of credit [member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest rate		6.00%	9.50%	6.00%
Borrowings maturity		2027	2027
Japanese yens [member]
Disclosure of detailed information about borrowings [line items]
Borrowings		$ 2,334,864	$ 2,282,608
Japanese yens [member] | Fixed rate senior notes interest rate 2.950% maturing 2039 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest rate		2.95%	2.95%	2.95%
Borrowings maturity		2039	2039
Borrowings		$ 2,334,864	$ 2,282,608
Chilean pesos [member]
Disclosure of detailed information about borrowings [line items]
Borrowings		$ 3,904,707	$ 4,312,424
Chilean pesos [member] | Fixed rate senior notes interest rate 3.961% maturing 2035 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest rate		3.961%	3.961%	3.961%
Borrowings maturity		2035	2035
Borrowings		$ 3,904,707	$ 4,312,424
Chilean pesos [member] | Finance Lease [member]
Disclosure of detailed information about borrowings [line items]
Borrowings		$ 64,437	$ 99,446
Chilean pesos [member] | Bottom of range [member] | Finance Lease [member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest rate		8.70%	8.70%	8.70%
Borrowings maturity		2019	2018
Chilean pesos [member] | Top of range [member] | Finance Lease [member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest rate		8.97%	8.97%	8.97%
Borrowings maturity		2027	2027
Other currencies [member]
Disclosure of detailed information about borrowings [line items]
Borrowings		$ 6,239,571	$ 6,595,032
Peru, Nuevos Soles | Lines of credit [member]
Disclosure of detailed information about borrowings [line items]
Borrowings maturity		2019
Borrowings		$ 7,898,595
Peru, Nuevos Soles | Bottom of range [member] | Lines of credit [member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest rate		4.70%		4.70%
Peru, Nuevos Soles | Top of range [member] | Lines of credit [member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest rate		12.10%		12.10%

Debt - Additional Information (

Debt - Additional Information (Detail) € / shares in Units, $ in Thousands, € in Millions, $ in Millions	1 Months Ended	12 Months Ended
	Sep. 30, 2018MXN ($)shares	Dec. 31, 2018MXN ($)CreditFacility€ / sharesshares	Dec. 31, 2017MXN ($)	Dec. 31, 2018USD ($)shares	Dec. 31, 2018EUR (€)shares	Sep. 30, 2018EUR (€)shares
Disclosure of detailed information about borrowings [line items]
Weighted average cost of borrowed funds		4.31%	4.30%
Borrowings		$ 638,922,453	$ 697,884,899
Number of revolving syndicated credit facilities | CreditFacility		2
Number of shares delivered | shares		71,063,212,170		71,063,212,170	71,063,212,170
Investments accounted for using equity method Koninklijke KPN [member]
Disclosure of detailed information about borrowings [line items]
Number of shares delivered | shares	224,695,844					224,695,844
Percentage of shares outstanding	5.00%
Nominal outstanding amount of bond | €						€ 750
Sale of share price per share | € / shares		$ 3.3374
Euros [member]
Disclosure of detailed information about borrowings [line items]
Borrowings		$ 236,548,891	263,998,076
Top of range [member]
Disclosure of detailed information about borrowings [line items]
Consolidated ratio of debt to EBITDA		400.00%
Bottom of range [member]
Disclosure of detailed information about borrowings [line items]
Consolidated ratio of EBITDA to interest paid		250.00%
Hybrid Notes [member]
Disclosure of detailed information about borrowings [line items]
Borrowings		$ 26,213,095	$ 49,148,975
Loan amount	$ 900,000
Borrowings, maturity	2073	2073	2073
Hybrid Notes [member] | Euros [member]
Disclosure of detailed information about borrowings [line items]
Borrowings		$ 12,407,214	$ 34,443,203
Revolving Syndicated Credit Facility One [member]
Disclosure of detailed information about borrowings [line items]
Loan amount				$ 2,000
Borrowings, maturity		2021
Revolving Syndicated Credit Facility Two [member]
Disclosure of detailed information about borrowings [line items]
Loan amount				2,500
Borrowings, maturity		2019
Syndicated revolving credit facilities [member] | Telekom Austria [member] | Euros [member]
Disclosure of detailed information about borrowings [line items]
Loan amount				$ 1,000
Series One Hybrid Notes [member]
Disclosure of detailed information about borrowings [line items]
Loan amount | €					€ 1,450
Borrowings interest rate		6.375%		6.375%	6.375%
Capital securities beginning redemption period		2018
Borrowings, original currency		Euros
Series Two Hybrid Notes [member]
Disclosure of detailed information about borrowings [line items]
Loan amount | €					€ 1,450
Borrowings interest rate		6.375%		6.375%	6.375%
Capital securities beginning redemption period		2023
Borrowings, original currency		Euros
Series Three Hybrid Notes [member]
Disclosure of detailed information about borrowings [line items]
Loan amount				$ 550
Borrowings interest rate		6.375%		6.375%	6.375%
Capital securities beginning redemption period		2020
Borrowings, original currency		Sterling pounds
Hybrid Notes [member]
Disclosure of detailed information about borrowings [line items]
Percentage of leverage for equity credit		50.00%	50.00%
Lines of credit [member]
Disclosure of detailed information about borrowings [line items]
Borrowings		$ 29,651,000	$ 31,364,000
Lines of credit [member] | Euros [member]
Disclosure of detailed information about borrowings [line items]
Borrowings		$ 5,526,850
Borrowings, maturity		2019
Lines of credit [member] | Top of range [member] | Euros [member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest rate		0.00%		0.00%	0.00%
Lines of credit [member] | Bottom of range [member] | Euros [member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest rate		(0.10%)		(0.10%)	(0.10%)
Mexico [member]
Disclosure of detailed information about borrowings [line items]
Commissions or the reimbursements for Mexican tax withholdings		4.90%	4.90%

Debt - Summary of Short Term De

Debt - Summary of Short Term Debt Maturities (Detail) $ in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2018MXN ($)	Dec. 31, 2017MXN ($)	Dec. 31, 2018USD ($)
Disclosure of detailed information about borrowings [line items]
Short-term debt	$ 96,230,634	$ 51,745,841	$ 4,889
Weighted average interest rate	5.20%	4.00%
Senior Notes 1 [member] | Obligations and senior notes [member]
Disclosure of detailed information about borrowings [line items]
Short-term debt	$ 67,365,810	$ 28,994,496
Lines of credit [member]
Disclosure of detailed information about borrowings [line items]
Short-term debt	28,852,364	22,714,383
Finance Lease [member]
Disclosure of detailed information about borrowings [line items]
Short-term debt	$ 12,460	$ 36,962

Debt - Summary of Long Term Deb

Debt - Summary of Long Term Debt Maturities (Detail) $ in Thousands, $ in Millions	Dec. 31, 2018MXN ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017MXN ($)
Disclosure of detailed information about borrowings [line items]
Long-term debt	$ 542,691,819	$ 27,572	$ 646,139,058
2020 [member]
Disclosure of detailed information about borrowings [line items]
Long-term debt	121,184,630
2021 [member]
Disclosure of detailed information about borrowings [line items]
Long-term debt	54,189,122
2022 [member]
Disclosure of detailed information about borrowings [line items]
Long-term debt	88,027,828
2023 and Thereafter [member]
Disclosure of detailed information about borrowings [line items]
Long-term debt	$ 279,290,239

Debt - Summary of Senior Notes

Debt - Summary of Senior Notes Outstanding (Detail) - MXN ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Disclosure of Senior Notes Outstanding [Line Items]
Borrowings	$ 638,922,453	$ 697,884,899
U.S. dollars [member]
Disclosure of Senior Notes Outstanding [Line Items]
Borrowings	184,089,282	185,060,098
Mexican pesos [member]
Disclosure of Senior Notes Outstanding [Line Items]
Borrowings	68,001,125	70,691,683
Euros [member]
Disclosure of Senior Notes Outstanding [Line Items]
Borrowings	236,548,891	263,998,076
Pound sterling [member]
Disclosure of Senior Notes Outstanding [Line Items]
Borrowings	55,223,526	58,823,089
Swiss francs [,ember]
Disclosure of Senior Notes Outstanding [Line Items]
Borrowings		11,169,748
Japanese yens [member]
Disclosure of Senior Notes Outstanding [Line Items]
Borrowings	2,334,864	2,282,608
Brazilian reals [member]
Disclosure of Senior Notes Outstanding [Line Items]
Borrowings	32,891,187	20,935,142
Chilean pesos [member]
Disclosure of Senior Notes Outstanding [Line Items]
Borrowings	3,904,707	4,312,424
Senior Notes 1 [member] | U.S. dollars [member]
Disclosure of Senior Notes Outstanding [Line Items]
Borrowings	184,089,282	185,060,098
Senior Notes 1 [member] | Mexican pesos [member]
Disclosure of Senior Notes Outstanding [Line Items]
Borrowings	68,001,125	70,691,683
Senior Notes 1 [member] | Euros [member]
Disclosure of Senior Notes Outstanding [Line Items]
Borrowings	236,548,891	263,998,076
Senior Notes 1 [member] | Pound sterling [member]
Disclosure of Senior Notes Outstanding [Line Items]
Borrowings	55,223,526	58,823,089
Senior Notes 1 [member] | Swiss francs [,ember]
Disclosure of Senior Notes Outstanding [Line Items]
Borrowings		11,169,748
Senior Notes 1 [member] | Japanese yens [member]
Disclosure of Senior Notes Outstanding [Line Items]
Borrowings	2,334,864	2,282,608
Senior Notes 1 [member] | Brazilian reals [member]
Disclosure of Senior Notes Outstanding [Line Items]
Borrowings	32,891,187	20,935,142
Senior Notes 1 [member] | Chilean pesos [member]
Disclosure of Senior Notes Outstanding [Line Items]
Borrowings	$ 3,904,707	$ 4,312,424

Accounts Payable, Accrued Lia_3

Accounts Payable, Accrued Liabilities and Asset Retirement Obligations - Components Accounts Payable and Accrued Liabilities (Detail) $ in Thousands, $ in Millions	Dec. 31, 2018MXN ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017MXN ($)
Accounts payable and accrued liabilities [abstract]
Suppliers	$ 118,406,380		$ 106,483,848
Sundry creditors	91,087,197		91,842,929
Interest payable	8,535,519		8,930,561
Guarantee deposits from customers	1,421,336		1,460,286
Dividends payable	2,506,835		3,955,783
Total	$ 221,957,267	$ 11,277	$ 212,673,407

Accounts Payable, Accrued Lia_4

Accounts Payable, Accrued Liabilities and Asset Retirement Obligations - Summary of Balance of Accrued Liabilities (Detail) $ in Thousands, $ in Millions	Dec. 31, 2018MXN ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017MXN ($)
Current liabilities
Direct employee benefits payable	$ 16,152,118		$ 16,673,627
Contingencies	40,281,573		51,079,131
Total	$ 56,433,691	$ 2,867	$ 67,752,758

Accounts Payable, Accrued Lia_5

Accounts Payable, Accrued Liabilities and Asset Retirement Obligations - Summary of Movements in Contingent Liabilities (Detail) - MXN ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Disclosure of contingent liabilities [abstract]
Beginning balance	$ 51,079,131	$ 50,766,070
Business combination	7,812	115,971
Effect of translation	(5,729,826)	(648,685)
Increase of the year	15,683,252	10,510,473
Applications payments	(6,203,329)	(7,618,520)
Applications reversals	(14,555,467)	(2,046,178)
Ending balance	$ 40,281,573	$ 51,079,131

Accounts Payable, Accrued Lia_6

Accounts Payable, Accrued Liabilities and Asset Retirement Obligations - Summary of Movements in Asset Retirement Obligations (Detail) - MXN ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Disclosure of asset retirement obligations [abstract]
Beginning balance	$ 18,245,129	$ 16,288,631
Effect of translation	(2,020,853)	(119,928)
Increase of the year	1,062,745	3,160,320
Applications payments	(151,364)	(126,088)
Applications reversals	(1,164,056)	(957,806)
Ending balance	$ 15,971,601	$ 18,245,129

Commitments and Contingencies -

Commitments and Contingencies - Schedule of Non-Cancelable Commitments under Finance Leases (Detail) $ in Thousands	Dec. 31, 2018MXN ($)
Disclosure of finance lease and operating lease by lessee [line items]
Minimum lease payments	$ 102,514
Less: amounts representing finance charges	23,837
Present value of net minimum lease payments	78,677
Less current portion	14,240
Long-term obligations	64,437
Present value of net minimum lease payments	78,677
2019 [member]
Disclosure of finance lease and operating lease by lessee [line items]
Minimum lease payments	22,920
2020 [member]
Disclosure of finance lease and operating lease by lessee [line items]
Minimum lease payments	13,365
2021 [member]
Disclosure of finance lease and operating lease by lessee [line items]
Minimum lease payments	12,068
2022 [member]
Disclosure of finance lease and operating lease by lessee [line items]
Minimum lease payments	10,751
2023 [member]
Disclosure of finance lease and operating lease by lessee [line items]
Minimum lease payments	9,399
2024 and thereafter [member]
Disclosure of finance lease and operating lease by lessee [line items]
Minimum lease payments	$ 34,011

Commitments and Contingencies_2

Commitments and Contingencies - Schedule of Non-Cancelable Commitments under Operating Leases (Detail) $ in Thousands	Dec. 31, 2018MXN ($)
Disclosure of finance lease and operating lease by lessee [line items]
Operating lease minimum payments	$ 137,949,821
2019 [member]
Disclosure of finance lease and operating lease by lessee [line items]
Operating lease minimum payments	24,034,366
2020 [member]
Disclosure of finance lease and operating lease by lessee [line items]
Operating lease minimum payments	22,104,366
2021 [member]
Disclosure of finance lease and operating lease by lessee [line items]
Operating lease minimum payments	15,522,020
2022 [member]
Disclosure of finance lease and operating lease by lessee [line items]
Operating lease minimum payments	14,250,332
2023 [member]
Disclosure of finance lease and operating lease by lessee [line items]
Operating lease minimum payments	12,046,800
2024 and thereafter [member]
Disclosure of finance lease and operating lease by lessee [line items]
Operating lease minimum payments	$ 49,991,937

Commitments and Contingencies_3

Commitments and Contingencies - Additional Information (Detail) R$ in Thousands, $ in Thousands, $ in Thousands

12 Months Ended

Dec. 31, 2018MXN ($)

Dec. 31, 2018BRL (R$)

Dec. 31, 2017MXN ($)

Dec. 31, 2016MXN ($)

Dec. 31, 2015MXN ($)

Dec. 31, 2014MXN ($)

Dec. 31, 2014USD ($)

Dec. 31, 2018BRL (R$)

Sep. 30, 2018MXN ($)

Sep. 30, 2018BRL (R$)

Dec. 31, 2017BRL (R$)

Dec. 31, 2012MXN ($)

Dec. 31, 2008

Disclosure of commitments and contingencies [line items]

Rent expense

$ 34,421,817

$ 35,571,283

$ 32,300,963

Fine imposed on sanction procedure initiated by triggered breach

2,543,937

Revert of provision

$ 13,034,562

R$ 2566000

Monetary correction in a total amount of regulatory matters

19,302,937

R$ 3800000

Provision for taxes other than income tax [member]

Disclosure of commitments and contingencies [line items]

Provision

$ 1,117,538

R$ 220000000

Telmex [member]

Disclosure of commitments and contingencies [line items]

Percentage of capital stock

51.00%

Fine imposed on alleged merger

$ 14,414

Agencia Nacional de telecomunicacoes [member]

Disclosure of commitments and contingencies [line items]

Inflation-related adjustments applicable to percentage of concessions price

60.00%

60.00%

ICMS related matters [member] | Provision for taxes other than income tax [member]

Disclosure of commitments and contingencies [line items]

Provision

$ 3,362,775,000

662,000,000

CSLL and IRPJ [member] | Provision for taxes other than income tax [member]

Disclosure of commitments and contingencies [line items]

Provision

4,835,894

952,000,000

Claro Brasil [member]

Disclosure of commitments and contingencies [line items]

Tax assessment amount related to undue amortization of goodwill

10,906,159

2,147,000,000

Claro Brasil [member] | Provision for taxes other than income tax [member]

Disclosure of commitments and contingencies [line items]

Provision

558,769

110,000,000

PIS and COFINS [member]

Disclosure of commitments and contingencies [line items]

Tax amount in dispute

5,221,952

1,028,000,000

Tax assessments related to offset in non-cumulative method

8,183,429

1,611,000,000

PIS and COFINS [member] | Provision for taxes other than income tax [member]

Disclosure of commitments and contingencies [line items]

Provision

5,861,997

1,154,000,000

FUST/FUNTTEL [member] | Legal proceedings provision [member]

Disclosure of commitments and contingencies [line items]

Provision

1,706,786

336,000,000

Brazilian ministry of communications [member] | Legal proceedings provision [member]

Disclosure of commitments and contingencies [line items]

Provision

5,080

R$ 1000

ISS [member] | Legal proceedings provision [member]

Disclosure of commitments and contingencies [line items]

Provision

25,399

5,000

Tax contingent liability [member] | ICMS related matters [member]

Disclosure of commitments and contingencies [line items]

Tax contingencies amount

55,455,306,000

10,917,000,000

Tax contingent liability [member] | ICMS related matters [member] | Provision for taxes other than income tax [member]

Disclosure of commitments and contingencies [line items]

Tax contingencies amount

21,167,194

4,167,000,000

Tax contingent liability [member] | Claro Brasil and Americe [member]

Disclosure of commitments and contingencies [line items]

Tax contingencies amount

5,861,997

1,154,000,000

Tax contingent liability [member] | Primesys [member]

Disclosure of commitments and contingencies [line items]

Tax contingencies amount

3,916,464

771,000,000

Tax contingent liability [member] | CSLL and IRPJ [member]

Disclosure of commitments and contingencies [line items]

Tax contingencies amount

17,779,021

3,500,000,000

Tax contingent liability [member] | PIS and COFINS [member]

Disclosure of commitments and contingencies [line items]

Tax contingencies amount

16,488,772

3,246,000,000

Tax contingent liability [member] | FUST/FUNTTEL [member]

Disclosure of commitments and contingencies [line items]

Provision

14,223,217

2,800,000,000

Tax contingent liability [member] | Brazilian ministry of communications [member]

Disclosure of commitments and contingencies [line items]

Provision

$ 5,115,278

R$ 1007000

Tax contingent liability [member] | ISS [member]

Disclosure of commitments and contingencies [line items]

Provision

3,637,080

716,000

Contingent liabilities [member]

Disclosure of commitments and contingencies [line items]

Tax contingencies amount

12,394,517

2,440,000,000

Contingent liabilities [member] | TFI [member]

Disclosure of commitments and contingencies [line items]

Tax contingencies amount

13,207,273

2,600,000

Legal proceedings contingent liability [member]

Disclosure of commitments and contingencies [line items]

Provision

$ 3,419,668

R$ 673200

Consorcio Ecuatoriano de Telecomunicaciones, S.A. (Conecel) [member]

Disclosure of commitments and contingencies [line items]

Amount of fine

$ 2,724,113

$ 138,400

Number of locations alleged for monopoly

5

5

Mexican tax administration service [member]

Disclosure of commitments and contingencies [line items]

Consolidated tax loss

$ 0

Mexican tax administration service [member] | Previous IFRS [member]

Disclosure of commitments and contingencies [line items]

Consolidated tax loss

8,556,000

Mexican tax administration service [member] | Tax contingent liability [member]

Disclosure of commitments and contingencies [line items]

Tax assessment related to tax return

$ 529,700

Mexican tax administration service [member] | Tax contingent liability [member] | America Central Tel, S.A de C.V [member]

Disclosure of commitments and contingencies [line items]

Tax assessment for alleged tax improprieties

$ 1,400,000

Commitments and Contingencies_4

Commitments and Contingencies - Schedule of Purchase Commitments (Detail) - Wireless carriers [member] - Purchase commitment for purchase of airtime minutes at current market prices [member] $ in Thousands	Dec. 31, 2018MXN ($)
Disclosure of commitments [line items]
Purchase commitments	$ 225,084,826
2019 [member]
Disclosure of commitments [line items]
Purchase commitments	88,233,626
2020 [member]
Disclosure of commitments [line items]
Purchase commitments	68,170,083
2021 [member]
Disclosure of commitments [line items]
Purchase commitments	55,358,156
2022 [member]
Disclosure of commitments [line items]
Purchase commitments	$ 13,322,961

Employee Benefits - Analysis of

Employee Benefits - Analysis of Net Liability and Net Period Cost for Employee Benefit (Detail) - MXN ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of net defined benefit liability (asset) [line items]
Liabilities	$ 118,325,014	$ 120,297,139
Net period cost (benefit)
Net period cost (benefit)	13,989,100	13,636,182	$ 14,240,271
Mexico [member]
Disclosure of net defined benefit liability (asset) [line items]
Liabilities	85,517,190	84,821,197
Net period cost (benefit)
Net period cost (benefit)	12,046,208	11,586,065	12,281,154
Puerto Rico [member]
Disclosure of net defined benefit liability (asset) [line items]
Liabilities	13,986,596	13,962,128
Net period cost (benefit)
Net period cost (benefit)	686,067	776,238	1,058,131
Europe [member]
Disclosure of net defined benefit liability (asset) [line items]
Liabilities	12,705,926	14,833,840
Net period cost (benefit)
Net period cost (benefit)	619,039	385,689	226,447
Brazil [member]
Disclosure of net defined benefit liability (asset) [line items]
Liabilities	5,666,694	6,276,780
Net period cost (benefit)
Net period cost (benefit)	579,432	735,855	633,159
Ecuador [member]
Disclosure of net defined benefit liability (asset) [line items]
Liabilities	448,608	403,194
Net period cost (benefit)
Net period cost (benefit)	$ 58,354	$ 152,335	$ 41,380

Employee Benefits - Summary of

Employee Benefits - Summary of Defined Benefit Obligation (DBO) and Plan Assets for Pension and Other Benefit Obligation Plans (Detail) - MXN ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of defined benefit plans [line items]
Defined benefit obligation and plan assets	$ (108,118,868)	$ (107,944,581)	$ (98,020,192)	$ (106,638,436)
Reportable segments [member]
Disclosure of defined benefit plans [line items]
Defined benefit obligation and plan assets	107,906,727	107,772,175
Reportable segments [member] | Mexico [member]
Disclosure of defined benefit plans [line items]
Defined benefit obligation and plan assets	84,592,642	83,765,572
Reportable segments [member] | Puerto Rico [member]
Disclosure of defined benefit plans [line items]
Defined benefit obligation and plan assets	13,986,596	13,962,128
Reportable segments [member] | Brazil [member]
Disclosure of defined benefit plans [line items]
Defined benefit obligation and plan assets	4,850,447	5,489,563
Reportable segments [member] | Europe [member]
Disclosure of defined benefit plans [line items]
Defined benefit obligation and plan assets	4,477,042	4,554,912
Defined benefit obligation [member]
Disclosure of defined benefit plans [line items]
Defined benefit obligation and plan assets	(306,702,447)	(329,113,625)	(313,282,595)	(314,049,729)
Defined benefit obligation [member] | Reportable segments [member]
Disclosure of defined benefit plans [line items]
Defined benefit obligation and plan assets	306,490,306	328,941,219
Defined benefit obligation [member] | Reportable segments [member] | Mexico [member]
Disclosure of defined benefit plans [line items]
Defined benefit obligation and plan assets	247,997,060	266,304,948
Defined benefit obligation [member] | Reportable segments [member] | Puerto Rico [member]
Disclosure of defined benefit plans [line items]
Defined benefit obligation and plan assets	35,220,889	38,711,695
Defined benefit obligation [member] | Reportable segments [member] | Brazil [member]
Disclosure of defined benefit plans [line items]
Defined benefit obligation and plan assets	18,795,315	19,369,664
Defined benefit obligation [member] | Reportable segments [member] | Europe [member]
Disclosure of defined benefit plans [line items]
Defined benefit obligation and plan assets	4,477,042	4,554,912
Plan assets [member]
Disclosure of defined benefit plans [line items]
Defined benefit obligation and plan assets	203,671,122	227,688,604	222,345,621	212,234,440
Plan assets [member] | Reportable segments [member]
Disclosure of defined benefit plans [line items]
Defined benefit obligation and plan assets	(203,671,122)	(227,688,604)
Plan assets [member] | Reportable segments [member] | Mexico [member]
Disclosure of defined benefit plans [line items]
Defined benefit obligation and plan assets	(163,404,418)	(182,539,376)
Plan assets [member] | Reportable segments [member] | Puerto Rico [member]
Disclosure of defined benefit plans [line items]
Defined benefit obligation and plan assets	(21,234,293)	(24,749,567)
Plan assets [member] | Reportable segments [member] | Brazil [member]
Disclosure of defined benefit plans [line items]
Defined benefit obligation and plan assets	(19,032,411)	(20,399,661)
Effect of asset celling [member]
Disclosure of defined benefit plans [line items]
Defined benefit obligation and plan assets	(5,087,543)	(6,519,560)	$ (7,083,218)	$ (4,823,147)
Effect of asset celling [member] | Reportable segments [member]
Disclosure of defined benefit plans [line items]
Defined benefit obligation and plan assets	5,087,543	6,519,560
Effect of asset celling [member] | Reportable segments [member] | Brazil [member]
Disclosure of defined benefit plans [line items]
Defined benefit obligation and plan assets	$ 5,087,543	$ 6,519,560

Employee Benefits - Summary o_2

Employee Benefits - Summary of the Actuarial Results Generated for the Pension and Retirement Plans as well as the Medical Services (Detail) - MXN ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of actuarial results generated for the pension and retirement plans [line items]
Balance at the beginning of the year	$ 107,944,581	$ 98,020,192	$ 106,638,436
Current service cost	3,322,813	4,285,693	4,606,856
Interest cost on projected benefit obligation	30,185,257	28,922,385	27,275,363
Expected return on plan assets	(20,804,104)	(20,916,104)	(18,972,042)
Changes in the asset ceiling during the period and others	587,373	716,330	875,192
Past service costs and other	157,765	53,032	165,851
Actuarial gain for changes in experience	(7,222)	(35,145)	(28,867)
Actuarial gain from changes in demographic assumptions	134,625	(85)
Actuarial (gain) loss from changes in financial assumptions	(24,890)	(4,294)	7,784
Net period cost	13,551,617	13,021,812	13,930,137
Actuarial loss for changes in experience		11,671,860
Actuarial gain for changes in experience	(21,283,470)		(20,976,837)
Actuarial gain from changes in demographic assumptions		(381,172)
Actuarial loss from changes in demographic assumptions	68,482		397,985
Actuarial loss from changes in financial assumptions			1,718,189
Actuarial gain (loss) from changes in financial assumptions	(1,246,539)	2,438,078
Changes in the asset ceiling during the period and others	(1,055,409)	(856,188)	(754,535)
Return on plan assets greater than discount rate	23,503,296	(2,483,430)	(4,724,041)
Recognized in other comprehensive income	(13,640)	10,389,148	(24,339,239)
Contributions to the pension plan made by the Company	(1,565,792)	(2,697,621)	(2,756,519)
Benefits paid			(176,702)
Payments to employees	(10,651,938)	(9,843,743)	(525,612)
Effect of translation	(1,145,960)	(945,207)	5,249,691
Others	(13,363,690)	(13,486,571)	1,790,858
Balance at the end of the year	108,118,868	107,944,581	98,020,192
Less short-term portion	(212,141)	(172,406)	(152,448)
Non-current obligation	107,906,727	107,772,175	97,867,744
Defined benefit obligation [member]
Disclosure of actuarial results generated for the pension and retirement plans [line items]
Balance at the beginning of the year	329,113,625	313,282,595	314,049,729
Current service cost	3,322,813	4,285,693	4,606,856
Interest cost on projected benefit obligation	30,185,257	28,922,385	27,275,363
Actuarial gain for changes in experience	(7,222)	(35,145)	(28,867)
Actuarial gain from changes in demographic assumptions	134,625	(85)
Actuarial (gain) loss from changes in financial assumptions	(24,890)	(4,294)	7,784
Net period cost	33,610,583	33,168,554	31,861,136
Actuarial loss for changes in experience		11,671,860
Actuarial gain for changes in experience	(21,283,470)		(20,976,837)
Actuarial gain from changes in demographic assumptions		(381,172)
Actuarial loss from changes in demographic assumptions	68,482		397,985
Actuarial loss from changes in financial assumptions			1,718,189
Actuarial gain (loss) from changes in financial assumptions	(1,246,539)	2,438,078
Recognized in other comprehensive income	(22,461,527)	13,728,766	(18,860,663)
Contributions made by plan participants	173,722	198,713	255,760
Benefits paid	(19,546,541)	(18,841,754)	(25,694,301)
Payments to employees	(10,651,938)	(9,843,743)	(525,612)
Effect of translation	(3,535,477)	(2,579,506)	12,196,546
Others	(33,560,234)	(31,066,290)	(13,767,607)
Balance at the end of the year	306,702,447	329,113,625	313,282,595
Less short-term portion	(212,141)	(172,406)	(152,448)
Non-current obligation	306,490,306	328,941,219	313,130,147
Plan assets [member]
Disclosure of actuarial results generated for the pension and retirement plans [line items]
Balance at the beginning of the year	(227,688,604)	(222,345,621)	(212,234,440)
Expected return on plan assets	(20,804,104)	(20,916,104)	(18,972,042)
Past service costs and other	157,765	53,032	165,851
Net period cost	(20,646,339)	(20,863,072)	(18,806,191)
Return on plan assets greater than discount rate	23,503,296	(2,483,430)	(4,724,041)
Recognized in other comprehensive income	23,503,296	(2,483,430)	(4,724,041)
Contributions made by plan participants	(173,722)	(198,713)	(255,760)
Contributions to the pension plan made by the Company	(1,565,792)	(2,697,621)	(2,756,519)
Benefits paid	19,546,541	18,841,754	25,517,599
Effect of translation	3,353,498	2,058,099	(9,086,269)
Others	21,160,525	18,003,519	13,419,051
Balance at the end of the year	(203,671,122)	(227,688,604)	(222,345,621)
Non-current obligation	(203,671,122)	(227,688,604)	(222,345,621)
Effect of asset celling [member]
Disclosure of actuarial results generated for the pension and retirement plans [line items]
Balance at the beginning of the year	6,519,560	7,083,218	4,823,147
Changes in the asset ceiling during the period and others	587,373	716,330	875,192
Net period cost	587,373	716,330	875,192
Changes in the asset ceiling during the period and others	(1,055,409)	(856,188)	(754,535)
Recognized in other comprehensive income	(1,055,409)	(856,188)	(754,535)
Effect of translation	(963,981)	(423,800)	2,139,414
Others	(963,981)	(423,800)	2,139,414
Balance at the end of the year	5,087,543	6,519,560	7,083,218
Non-current obligation	$ 5,087,543	$ 6,519,560	$ 7,083,218

Employee Benefits - Additional

Employee Benefits - Additional Information (Detail) - MXN ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of defined benefit plans [line items]
Current service cost	$ 3,322,813	$ 4,285,693	$ 4,606,856
Expected return on plan assets	20,804,104	20,916,104	18,972,042
Net pension plan liability and plan assets	$ (108,118,868)	(107,944,581)	(98,020,192)	$ (106,638,436)
Defined contribution plan, payment			(176,702)
Severance benefit obligations, description	Severance benefit obligations for employees hired before 1 January 2003, excluding civil servants, are covered by defined benefit plans. Upon termination by Telekom Austria Group or retirement, eligible employees receive severance payments equal to a multiple of their monthly compensation which comprises fixed compensation plus variable elements such as overtime or bonuses. Maximum severance is equal to a multiple of twelve times the eligible monthly compensation. In case of death, the heirs of eligible employees receive 50% of the severance benefits. Telekom Austria Group is exposed to the risk of development of salary increases and changes of interest rates.
Severance benefits, in case of death	50.00%
Akenes [member]
Disclosure of defined benefit plans [line items]
Defined Benefit Plan, Pension Benefit Obligation, Percentage	7.00%
Telekom Austria [member]
Disclosure of defined benefit plans [line items]
Defined benefits plan, eligibility retirement date	Jan. 1, 1975
Telekom Austria [member] | Defined Contribution Plans [member]
Disclosure of defined benefit plans [line items]
Annual expense of defined contribution plan	$ 272,453	256,507	258,891
Telekom Austria [member] | Unfunded Pension Plans [member]
Disclosure of defined benefit plans [line items]
Benefit determination maximum percentage on salary before retirement	80.00%
Telmexs [member]
Disclosure of defined benefit plans [line items]
Net pension plan liability and plan assets	$ 163,404,418	$ 182,539,376
Rate of equity instruments		32.00%
Rate of debt instruments	30.40%
Recorded of pension plan re-measurement value in defined pension plan	$ (1,141,142)	$ 12,394,617
Increase in fair value of related party pension plan investments	$ 21,279,760	437,663
Plan description	A percentage of the Telmex's employees are covered under defined benefit pension plans and seniority premiums. Pension benefits and seniority premiums are determined on the basis of compensation received by employees in their final year of employment, their seniority, and their retirement age. Telmex has set up an irrevocable trust fund to finance these employee benefits and has adopted the policy of making contributions to such fund when it is considered necessary.
Top of range [member] | Telekom Austria [member] | Defined Contribution Plans [member]
Disclosure of defined benefit plans [line items]
Percentage of defined contribution plan	5.00%
Austria [member]
Disclosure of defined benefit plans [line items]
Service award description	Civil servants and certain employees are eligible to receive certain service awards. Under such plans, eligible employees receive a cash bonus of two months’ salary after 25 years of service and four months’ salary after 40 years of service. Employees with at least 35 years of service when retiring (at the age of 65) or who are retiring under a specific legal regime are eligible to receive four monthly salaries. The compensation is accrued as earned over the period of service, taking into account the employee turnover rate.
Service period to receive bonus, description	After 25 years
Service period to receive bonus, description	After 40 years
Contributions to social security, net of the share contributed by civil servants	$ 1,420,446	1,309,157
Contributions to the government, net of the share contributed by civil servants	518,607	453,641
Austria [member] | Defined Contribution Plans [member]
Disclosure of defined benefit plans [line items]
DCP liability	$ 116,244	$ 120,892
Austria [member] | Telekom Austria [member]
Disclosure of defined benefit plans [line items]
Percentage of contribution to social security	12.55%	12.55%
Austria [member] | Telekom Austria [member] | Defined Contribution Plans [member]
Disclosure of defined benefit plans [line items]
Defined contribution plan, payment	$ 53,755	$ 46,084
Austria [member] | Bottom of range [member]
Disclosure of defined benefit plans [line items]
Service period to receive bonus, description	35 years of service when retiring (at the age of 65)
Percentage of contribution to active civil servants	7.00%
Austria [member] | Top of range [member]
Disclosure of defined benefit plans [line items]
Percentage of contribution to active civil servants	29.00%
Brazil [member]
Disclosure of defined benefit plans [line items]
Current service cost	$ 98,658	93,742	65,101
Employee benefits	724,009	650,815
Cost of labor	$ 2,377	374	(935)
Brazil [member] | Claro Brasil [member] | Defined Contribution Plans [member]
Disclosure of defined benefit plans [line items]
Unfunded liability, payment term	20 years
Unpaid balances adjustments	Unpaid balances are adjusted monthly based on the yield of the asset portfolio at that date and is increased based on the General Price Index of Brazil plus 6 percentage points per year
Increased percentage per year	6.00%
DCP liability	$ 92,238	136,402
Brazil [member] | Bottom of range [member] | Claro Brasil [member] | Participants enrolled before October 31st, 2014 [member]
Disclosure of defined benefit plans [line items]
Employee contributions to the plan	3.00%
Brazil [member] | Bottom of range [member] | Claro Brasil [member] | Participants enrolled after October 31st, 2014 [member]
Disclosure of defined benefit plans [line items]
Employee contributions to the plan	1.00%
Brazil [member] | Top of range [member] | Claro Brasil [member]
Disclosure of defined benefit plans [line items]
Employer contributions to the plan	8.00%
Brazil [member] | Top of range [member] | Claro Brasil [member] | Participants enrolled before October 31st, 2014 [member]
Disclosure of defined benefit plans [line items]
Employee contributions to the plan	8.00%
Brazil [member] | Top of range [member] | Claro Brasil [member] | Participants enrolled after October 31st, 2014 [member]
Disclosure of defined benefit plans [line items]
Employee contributions to the plan	7.00%
Mexico [member]
Disclosure of defined benefit plans [line items]
Current service cost		165,884	200,455
Expected return on plan assets	$ (16,347)
Employee benefits	924,548	1,055,625
Ecuador [member]
Disclosure of defined benefit plans [line items]
Current service cost	58,354	152,335	$ 41,380
Employee benefits	$ 448,608	$ 403,194

Employee Benefits - Schedule of

Employee Benefits - Schedule of Plan Assets Invested (Detail)	Dec. 31, 2018	Dec. 31, 2017
Puerto Rico [member]
Disclosure of fair value of plan assets [line items]
Equity instruments	37.00%	37.00%
Debt instruments	60.00%	61.00%
Others	3.00%	2.00%
Total	100.00%	100.00%
Brazil [member]
Disclosure of fair value of plan assets [line items]
Equity instruments		6.00%
Debt instruments	94.00%	88.00%
Others	6.00%	6.00%
Total	100.00%	100.00%
Mexico [member]
Disclosure of fair value of plan assets [line items]
Equity instruments	39.00%	61.00%
Debt instruments	61.00%	39.00%
Total	100.00%	100.00%

Employee Benefits - Summary o_3

Employee Benefits - Summary of Assumptions Used in Determining the Net Period Cost (Detail)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Puerto Rico [member]
Disclosure of sensitivity analysis for actuarial assumptions [line items]
Discount rate and long-term rate return	4.45%	3.61%	4.16%
Rate of future salary increases	2.75%	2.75%	3.50%
Percentage of increase in health care costs for the coming year	3.87%	3.57%	4.20%
Year to which this level will be maintained	N/A	N/A	N/A
Brazil [member]
Disclosure of sensitivity analysis for actuarial assumptions [line items]
Discount rate and long-term rate return	9.10%	10.18%	10.84%
Rate of future salary increases	4.00%	4.50%	4.85%
Percentage of increase in health care costs for the coming year	10.50%	11.00%	11.35%
Year to which this level will be maintained	2029	2028	2017
Mexico [member]
Disclosure of sensitivity analysis for actuarial assumptions [line items]
Discount rate and long-term rate return	11.81%	10.70%	10.70%
Rate of future salary increases	3.55%	4.50%	4.50%
Rate of increase of pensions	3.47%	3.83%	3.83%
Europe [member]
Disclosure of sensitivity analysis for actuarial assumptions [line items]
Discount rate and long-term rate return	1.25%	1.00%	1.00%
Rate of future salary increases			3.00%
Rate of increase of pensions	1.60%	1.60%	1.60%
Europe [member] | Bottom of range [member]
Disclosure of sensitivity analysis for actuarial assumptions [line items]
Employee turnover rate	0.00%	0.00%	0.00%
Europe [member] | Top of range [member]
Disclosure of sensitivity analysis for actuarial assumptions [line items]
Employee turnover rate	1.51%	1.72%	1.88%
Europe [member] | Actuarial assumption rate one [member]
Disclosure of sensitivity analysis for actuarial assumptions [line items]
Discount rate and long-term rate return	1.75%	1.50%	1.50%
Rate of future salary increases	3.00%	3.00%	3.90%
Europe [member] | Actuarial assumption rate two [member]
Disclosure of sensitivity analysis for actuarial assumptions [line items]
Discount rate and long-term rate return	2.00%	2.00%	1.75%
Rate of future salary increases	3.50%	3.50%	4.40%
Europe [member] | Actuarial assumption rate three [member]
Disclosure of sensitivity analysis for actuarial assumptions [line items]
Rate of future salary increases	4.40%	4.40%

Employee Benefits - Summary o_4

Employee Benefits - Summary of Increase (Decrease) Would Have Resulted in the DBO Pension and Other Benefits (Detail) $ in Thousands	Dec. 31, 2018MXN ($)
-100 [member] | Discount rate [member]
Disclosure of sensitivity analysis for actuarial assumptions [line items]
DBO pension and other benefits	$ 37,185,664
-100 [member] | Health care cost trend rate [member]
Disclosure of sensitivity analysis for actuarial assumptions [line items]
DBO pension and other benefits	(651,697)
+100 [member] | Discount rate [member]
Disclosure of sensitivity analysis for actuarial assumptions [line items]
DBO pension and other benefits	(38,604,684)
+100 [member] | Health care cost trend rate [member]
Disclosure of sensitivity analysis for actuarial assumptions [line items]
DBO pension and other benefits	$ 761,278

Employee Benefits - Summary o_5

Employee Benefits - Summary of Long-Term Direct Employee Benefits (Detail) - MXN ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Disclosure of long term direct employee benefits [abstract]
Beginning balance	$ 10,158,036	$ 11,251,499
Effect of translation	(493,795)	795,581
Increase of the year	1,750,831	771,274
Applications, Payments	(2,079,880)	(2,077,632)
Applications Applications, Reversals	(1,223,414)	(582,686)
Ending balance	$ 8,111,778	$ 10,158,036

Financial Assets and Liabilit_3

Financial Assets and Liabilities - Summary of Categorization of Financial Instruments, Excluding Cash and Cash Equivalents (Detail) - MXN ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Financial Assets:
Financial Assets	$ 257,974,604	$ 294,846,664
Financial Liabilities:
Financial Liabilities	711,544,172	769,276,398
Loans and receivables [member]
Financial Assets:
Financial Assets	196,453,950	176,391,786
Loans and receivables [member] | Related parties [member]
Financial Assets:
Financial Assets	1,263,605	868,230
Fair value through profit or loss [member]
Financial Assets:
Financial Assets	5,287,548	8,037,384
Fair value through OCI [member]
Financial Assets:
Financial Assets	39,028,083	46,682,657
Equity investments at fair value through OCI and other short term investments [member]
Financial Assets:
Financial Assets	49,015,934	59,120,676
Equity investments at fair value through OCI and other short term investments [member] | Loans and receivables [member]
Financial Assets:
Financial Assets	9,987,851	12,438,019
Equity investments at fair value through OCI and other short term investments [member] | Fair value through OCI [member]
Financial Assets:
Financial Assets	39,028,083	46,682,657
Accounts receivable from subscribers distributors contractual assets and other net [member] | Loans and receivables [member]
Financial Assets:
Financial Assets	185,202,494	163,085,537
Financial instruments, class [member]
Financial Liabilities:
Financial Liabilities	17,107,579	14,359,460
Financial instruments, class [member] | Fair value through profit or loss [member]
Financial Assets:
Financial Assets	5,287,548	8,037,384
Loans and receivables [member]
Financial Liabilities:
Financial Liabilities	863,853,933	913,098,718
Loans and receivables [member] | Related parties [member]
Financial Liabilities:
Financial Liabilities	2,974,213	2,540,412
Loans and receivables [member] | Equity investments at fair value through OCI and other short term investments [member]
Financial Liabilities:
Financial Liabilities	638,922,453	697,884,899
Loans and receivables [member] | Accounts receivable from subscribers distributors contractual assets and other net [member]
Financial Liabilities:
Financial Liabilities	221,957,267	212,673,407
Fair value through profit or loss [Member]
Financial Liabilities:
Financial Liabilities	17,107,579	14,359,460
Fair value through profit or loss [Member] | Financial instruments, class [member]
Financial Liabilities:
Financial Liabilities	$ 17,107,579	$ 14,359,460

Financial Assets and Liabilit_4

Financial Assets and Liabilities - Summary of Fair Value for Financial Assets (Excluding Cash and Cash Equivalents) and Financial Liabilities (Detail) - MXN ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Assets:
Financial Assets	$ 257,974,604	$ 294,846,664
Liabilities:
Financial Liabilities	711,544,172	769,276,398
Debt [member]
Liabilities:
Financial Liabilities	694,436,593	754,916,938
Financial instruments, class [member]
Liabilities:
Financial Liabilities	17,107,579	14,359,460
Equity investments at fair value through OCI and other short term investments [member]
Assets:
Financial Assets	49,015,934	59,120,676
Pension plan assets [member]
Assets:
Financial Assets	203,671,122	227,688,604
Derivative Financial Instruments [Member]
Assets:
Financial Assets	5,287,548	8,037,384
Level 1 [member]
Assets:
Financial Assets	225,585,814	265,201,015
Liabilities:
Financial Liabilities	594,713,342	691,769,785
Level 1 [member] | Debt [member]
Liabilities:
Financial Liabilities	594,713,342	691,769,785
Level 1 [member] | Equity investments at fair value through OCI and other short term investments [member]
Assets:
Financial Assets	39,028,083	46,682,657
Level 1 [member] | Pension plan assets [member]
Assets:
Financial Assets	186,557,731	218,518,358
Level 2 [member]
Assets:
Financial Assets	32,371,743	29,514,673
Liabilities:
Financial Liabilities	116,830,830	77,506,613
Level 2 [member] | Debt [member]
Liabilities:
Financial Liabilities	99,723,251	63,147,153
Level 2 [member] | Financial instruments, class [member]
Liabilities:
Financial Liabilities	17,107,579	14,359,460
Level 2 [member] | Equity investments at fair value through OCI and other short term investments [member]
Assets:
Financial Assets	9,987,851	12,438,019
Level 2 [member] | Pension plan assets [member]
Assets:
Financial Assets	17,096,344	9,039,270
Level 2 [member] | Derivative Financial Instruments [Member]
Assets:
Financial Assets	5,287,548	8,037,384
Level 3 [member]
Assets:
Financial Assets	17,047	130,976
Level 3 [member] | Pension plan assets [member]
Assets:
Financial Assets	$ 17,047	$ 130,976

Financial Assets and Liabilit_5

Financial Assets and Liabilities - Additional Information (Detail) - Level 2 [member] - MXN ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of detailed information about financial instruments [line items]
Net realized gains (losses) related to derivative financial instruments	$ 5,286,290,000	$ 1,515,668,000
Transfers out of Level 1 into Level 2 of fair value hierarchy	$ 0	$ 0	$ 0

Financial Assets and Liabilit_6

Financial Assets and Liabilities - Summary of changes in liabilities arising from financing activities (Detail) - MXN ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Disclosure of reconciliation of liabilities arising from financing activities [abstract]
Beginning balance	$ 697,884,899	$ 707,801,403
Cash flow	(34,050,923)	(27,433,489)
Foreign currency exchange and other	(24,911,523)	17,516,985
Ending balance	$ 638,922,453	$ 697,884,899

Shareholders' Equity - Addition

Shareholders' Equity - Additional Information (Detail) $ / shares in Units, $ in Thousands, $ in Millions	Apr. 16, 2018$ / shares	Nov. 13, 2017shares	Jul. 17, 2017shares	Apr. 05, 2017$ / shares	Jan. 03, 2018MXN ($)	Dec. 31, 2018MXN ($)shares	Dec. 31, 2018USD ($)	Dec. 31, 2017MXN ($)shares
Disclosure of classes of share capital [line items]
Capital requirements | $						$ 270,049
Number of shares issued						71,063,212,170
Number of shares outstanding						66,034,792,526		66,069,035,539
Number of treasury shares held						5,028,419,644		29,420,688,657
Merger transaction description						any transaction representing 20% or more of the Company’s consolidated assets	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%	10.00%
Redemption of hybrid bond						$ (13,440,120)	$ (683)
Hybrid Bonds [member]
Disclosure of classes of share capital [line items]
Redemption of hybrid bond | $					$ 600,000
Payment for redemption of bond | $					$ 13,440,120
Bottom of range [member] | Legal reserve [member]
Disclosure of classes of share capital [line items]
Increase in legal reserve						5.00%	5.00%
Top of range [member] | Legal reserve [member]
Disclosure of classes of share capital [line items]
Increase in legal reserve						20.00%	20.00%
Capital Stock Class AA Voting Rights [member]
Disclosure of classes of share capital [line items]
Number of shares issued						20,601,632,660
Capital Stock Class A Voting Rights [member]
Disclosure of classes of share capital [line items]
Number of shares issued						558,677,704
Capital Stock Class L Limited Voting Rights [member]
Disclosure of classes of share capital [line items]
Number of shares issued						49,902,901,806
Capital Stock Class Aa [member]
Disclosure of classes of share capital [line items]
Number of shares outstanding						20,601,632,660		20,601,632,660
Dividends paid | $ / shares	$ 0.32			$ 0.30
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						546,112,938		566,661,526
Dividends paid | $ / shares	0.32			0.30
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						44,887,046,928		44,900,741,353
Dividends paid | $ / shares	0.32			0.30
Periodic payment of dividend | $ / shares	$ 0.16			$ 0.15
Periodic payable date of dividend	July 16 and November 12
Number of additional shares		16,905,414	325,264,125
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						5,028,399,396		29,419,120,359
Class A [member]
Disclosure of classes of share capital [line items]
Number of treasury shares held						20,248		1,568,298

Shareholders Equity - Summary o

Shareholders Equity - Summary of Computation of Basic and Diluted Earnings per Share (Detail) $ / shares in Units, $ in Thousands, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2018MXN ($)$ / sharesshares	Dec. 31, 2018USD ($)shares	Dec. 31, 2017MXN ($)$ / sharesshares	Dec. 31, 2016MXN ($)$ / sharesshares
Earnings per share [abstract]
Net profit for the period attributable to equity holders of the parent	$ 52,566,197	$ 2,670	$ 29,325,921	$ 8,649,427
Weighted average shares (in millions) | shares	66,055	66,055	65,909	65,693
Earnings per share attributable to equity holders of the parent | $ / shares	$ 0.79		$ 0.44	$ 0.13

Components of Other Comprehen_3

Components of Other Comprehensive (Loss) Income - Summary of Movement on Components of Other Comprehensive (Loss) Income (Detail) $ in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2018MXN ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017MXN ($)	Dec. 31, 2016MXN ($)
Controlling interest:
Unrealized (loss) gain on equity investments at fair value, net of deferred taxes	$ (3,765,688)	$ (191)	$ 622,424	$ (6,673,731)
Translation effect of foreign entities	(64,314,032)		(18,309,877)	107,498,708
Total other comprehensive (loss) income items for the year, net of deferred taxes	(67,322,442)	$ (3,421)	(24,721,250)	115,647,505
Total equity attributable to equity holders of the parent [member]
Controlling interest:
Valuation of the derivative financial instruments, net of deferred taxes			12,292	48,496
Unrealized (loss) gain on equity investments at fair value, net of deferred taxes	(3,765,688)		622,424	(6,673,731)
Translation effect of foreign entities	(61,223,458)		(21,683,333)	104,178,880
Remeasurement of defined benefit plan, net of deferred taxes	652,722		(7,075,606)	14,771,770
Non-controlling interest of the items above	(2,986,018)		3,402,973	3,322,090
Total other comprehensive (loss) income items for the year, net of deferred taxes	$ (67,322,442)		$ (24,721,250)	$ 115,647,505

Valuation of derivatives intere

Valuation of derivatives interest cost from labor obligations and other financial items net - Schedule of Valuation of Derivatives and Other Financial Items (Detail) $ in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2018MXN ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017MXN ($)	Dec. 31, 2016MXN ($)
Disclosure of detailed information about financial instruments [abstract]
(Loss) gain in valuation of derivatives, net	$ (4,686,407)		$ 8,192,567	$ (9,622,233)
Capitalized interest expense (Note 10 d)	2,020,288		2,875,034	2,861,307
Commissions	(1,901,473)		(1,263,701)	(2,034,972)
Interest cost of labor obligations (Note 17)	(9,968,526)		(8,722,611)	(9,178,513)
Interest expense on taxes	(555,921)		(1,503,981)	(245,922)
Dividend received (Note 4)	2,605,333		2,385,559	5,740,092
Gain on net monetary positions (Note 2i, c)	4,429,145	$ 225
Other financial cost	(2,118,755)		(3,906,627)	(3,745,600)
Valuation of derivatives and other financial items	$ (10,176,316)	$ (517)	$ (1,943,760)	$ (16,225,841)

Segments - Additional Informati

Segments - Additional Information (Detail) - Operating segments [member]	12 Months Ended
	Dec. 31, 2018
Disclosure of Operating Segments [Line Items]
Percentage of entity revenue	10.00%
Percentage of taxable profit	10.00%
Percentage of consolidated assets	10.00%

Segments - Summary of Operating

Segments - Summary of Operating Segments (Detail) $ in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2018MXN ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017MXN ($)	Dec. 31, 2016MXN ($)	Dec. 31, 2018USD ($)	Dec. 31, 2015MXN ($)
Disclosure of Operating Segments [Line Items]
External revenues	$ 1,038,207,681		$ 1,021,633,535	$ 975,412,488
Total revenues	1,038,207,681	$ 52,747	1,021,633,535	975,412,488
Depreciation and amortization	155,712,580	7,911	160,174,942	148,525,921
Operating income	139,557,171		100,143,303	109,610,310
Interest income	10,646,169	541	2,925,648	4,192,595
Interest expense	31,771,433	1,614	30,300,781	33,862,012
Income tax	46,477,079	2,361	24,941,511	11,398,856
Equity interest in net income (loss) of associated companies	267		91,385	189,950
Net profit (loss) attributable to equity holders of the parent	52,566,197	$ 2,670	29,325,921	8,649,427
Assets by segment	1,429,223,392		1,486,211,852	1,515,042,274	$ 72,613
Plant, property and equipment, net	640,000,720		676,343,198	701,190,066	32,516	$ 573,528,878
Goodwill	145,566,497		151,463,232	152,632,635	7,396
Trademarks, net	4,667,205		9,937,807	12,566,893
Licenses and rights, net	103,298,395		113,304,386	116,031,264
Investment in associated companies	3,132,707		3,735,172	3,603,484	159
Liabilities by segments	1,183,350,970		1,225,578,335	1,244,018,507	$ 60,121
Operating segments [member] | Mexico [member]
Disclosure of Operating Segments [Line Items]
External revenues	207,610,244		190,022,612	187,127,903
Intersegment revenues	16,946,543		16,748,428	16,438,858
Total revenues	224,556,787		206,771,040	203,566,761
Depreciation and amortization	17,619,342		17,030,251	16,451,496
Operating income	57,450,599		50,666,028	48,219,505
Interest income	26,578,280		30,083,437	28,659,372
Interest expense	32,526,258		32,185,868	32,004,944
Income tax	28,842,505		18,142,482	2,502,242
Equity interest in net income (loss) of associated companies	(5,962)		99,044	67,472
Net profit (loss) attributable to equity holders of the parent	23,185,029		26,321,442	378,150
Assets by segment	970,564,314		1,033,036,406	1,070,598,204
Plant, property and equipment, net	56,056,634		59,137,555	64,893,242
Goodwill	27,104,632		27,102,384	27,186,328
Trademarks, net	227,774		406,723	615,318
Licenses and rights, net	10,573,147		11,457,720	5,887,092
Investment in associated companies	5,621,661		469,662	7,605,220
Liabilities by segments	748,965,728		794,598,013	798,044,609
Operating segments [member] | Telmex [member]
Disclosure of Operating Segments [Line Items]
External revenues	86,339,289		89,731,238	93,343,612
Intersegment revenues	9,741,908		8,753,525	8,872,248
Total revenues	96,081,197		98,484,763	102,215,860
Depreciation and amortization	18,358,248		18,902,238	17,150,013
Operating income	8,085,764		7,921,524	12,275,892
Interest income	420,380		619,748	303,915
Interest expense	1,153,913		1,028,593	1,135,552
Income tax	643,377		387,145	921,803
Equity interest in net income (loss) of associated companies	44,965		16,564	116,368
Net profit (loss) attributable to equity holders of the parent	(2,201,572)		184,387	902,282
Assets by segment	174,461,398		170,402,561	161,133,722
Plant, property and equipment, net	103,737,293		109,713,770	112,220,236
Goodwill	215,381		213,926	213,926
Trademarks, net	243,556		274,786	307,881
Licenses and rights, net			13,175	42,867
Investment in associated companies	563,667		546,872	2,218,824
Liabilities by segments	136,993,838		133,428,178	117,663,161
Operating segments [member] | Brazil [member]
Disclosure of Operating Segments [Line Items]
External revenues	188,712,666		210,536,673	193,796,237
Intersegment revenues	4,593,760		4,785,601	3,560,388
Total revenues	193,306,426		215,322,274	197,356,625
Depreciation and amortization	42,857,751		51,486,652	47,170,935
Operating income	23,494,903		11,601,369	6,325,323
Interest income	11,303,888		3,792,242	3,747,684
Interest expense	20,377,191		23,578,083	22,970,335
Income tax	4,026,444		(2,991,377)	(4,294,040)
Equity interest in net income (loss) of associated companies	(152)		(232)	(270)
Net profit (loss) attributable to equity holders of the parent	3,530,653		(6,617,381)	(10,357,493)
Assets by segment	390,791,480		428,281,963	461,831,754
Plant, property and equipment, net	173,197,708		187,459,628	203,270,555
Goodwill	21,388,124		24,708,739	26,106,622
Trademarks, net	124,910		246,557	366,727
Licenses and rights, net	25,873,910		35,662,305	41,496,209
Investment in associated companies	543		640	699
Liabilities by segments	298,308,084		322,620,030	349,915,118
Operating segments [member] | Southern Cone [member]
Disclosure of Operating Segments [Line Items]
External revenues	89,149,978		81,092,885	71,553,356
Intersegment revenues	13,200,358		1,250,983	776,719
Total revenues	102,350,336		82,343,868	72,330,075
Depreciation and amortization	13,526,361		10,639,591	9,739,634
Operating income	16,975,797		11,676,427	8,317,053
Interest income	2,251,474		2,884,613	2,649,539
Interest expense	4,338,941		4,637,989	5,049,457
Income tax	1,390,039		3,535,302	2,021,090
Equity interest in net income (loss) of associated companies	(20,871)		(9,801)	(23,319)
Net profit (loss) attributable to equity holders of the parent	6,065,703		4,421,938	3,765,015
Assets by segment	127,946,573		133,136,177	140,617,162
Plant, property and equipment, net	62,988,635		69,006,093	67,023,143
Goodwill	2,796,759		3,073,444	3,006,448
Licenses and rights, net	12,555,496		8,885,086	8,760,860
Investment in associated companies	20,697		63,110	81,284
Liabilities by segments	94,550,901		119,123,646	124,149,687
Operating segments [member] | Columbia [member]
Disclosure of Operating Segments [Line Items]
External revenues	75,460,428		72,435,460	67,330,768
Intersegment revenues	344,517		304,555	257,767
Total revenues	75,804,945		72,740,015	67,588,535
Depreciation and amortization	13,464,867		12,373,790	11,283,749
Operating income	14,388,552		(4,704,165)	11,209,959
Interest income	1,013,839		211,521	104,304
Interest expense	2,913,881		1,955,688	1,079,989
Income tax	2,251,877		(1,874,594)	4,456,750
Net profit (loss) attributable to equity holders of the parent	9,165,801		(6,209,530)	4,022,633
Assets by segment	111,975,598		108,362,023	103,361,235
Plant, property and equipment, net	51,422,548		57,060,931	59,690,886
Goodwill	12,770,380		13,981,033	14,659,891
Trademarks, net				194
Licenses and rights, net	3,400,235		4,197,498	4,603,793
Investment in associated companies	412		451	470
Liabilities by segments	56,211,438		54,756,152	40,811,337
Operating segments [member] | Andean [member]
Disclosure of Operating Segments [Line Items]
External revenues	55,633,192		56,393,595	55,825,972
Intersegment revenues	154,082		177,856	304,834
Total revenues	55,787,274		56,571,451	56,130,806
Depreciation and amortization	8,516,960		8,328,705	7,764,474
Operating income	5,003,915		5,650,477	6,086,638
Interest income	1,666,879		1,793,974	944,945
Interest expense	1,719,663		1,573,929	1,147,380
Income tax	2,498,666		1,806,085	1,768,066
Net profit (loss) attributable to equity holders of the parent	1,730,933		1,595,382	3,621,863
Assets by segment	96,347,779		113,478,626	113,839,981
Plant, property and equipment, net	35,800,477		35,930,966	37,716,772
Goodwill	5,242,365		6,113,495	5,948,335
Licenses and rights, net	9,651,582		11,295,202	12,882,210
Liabilities by segments	50,064,761		48,656,628	52,949,608
Operating segments [member] | Central America [member]
Disclosure of Operating Segments [Line Items]
External revenues	44,883,585		44,094,835	42,131,666
Intersegment revenues	149,445		187,086	289,465
Total revenues	45,033,030		44,281,921	42,421,131
Depreciation and amortization	8,940,655		9,668,439	10,474,681
Operating income	4,867,763		5,252,401	3,830,974
Interest income	1,566,086		1,064,992	462,779
Interest expense	509,081		485,684	411,597
Income tax	2,533,600		2,025,618	3,291,776
Equity interest in net income (loss) of associated companies				171
Net profit (loss) attributable to equity holders of the parent	2,821,733		3,713,301	538,890
Assets by segment	81,640,157		81,529,691	80,832,029
Plant, property and equipment, net	37,146,601		39,050,481	41,808,573
Goodwill	5,466,871		5,597,990	5,652,268
Licenses and rights, net	3,605,416		3,376,106	3,993,120
Investment in associated companies	24,262		16,999	17,390
Liabilities by segments	28,592,953		35,501,900	38,095,161
Operating segments [member] | U.S.A [member]
Disclosure of Operating Segments [Line Items]
External revenues	153,266,315		148,589,487	140,856,365
Intersegment revenues			44
Total revenues	153,266,315		148,589,531	140,856,365
Depreciation and amortization	1,545,395		1,594,727	1,073,623
Operating income	2,665,270		2,915,123	1,220,601
Interest income	559,548		394,196	239,797
Income tax	810,898		1,803,555	767,295
Net profit (loss) attributable to equity holders of the parent	2,820,505		1,793,875	987,790
Assets by segment	38,814,907		40,761,830	42,812,349
Plant, property and equipment, net	1,356,237		1,693,642	1,949,166
Goodwill	3,328,533		3,341,956	3,464,217
Trademarks, net	507,033		631,024	788,228
Liabilities by segments	35,552,678		38,249,957	41,369,767
Operating segments [member] | Caribbean [member]
Disclosure of Operating Segments [Line Items]
External revenues	36,435,541		35,092,578	36,467,781
Intersegment revenues	204,294		122,656	30,210
Total revenues	36,639,835		35,215,234	36,497,991
Depreciation and amortization	5,036,831		5,349,757	5,225,498
Operating income	5,811,846		4,752,168	6,143,183
Interest income	1,458,874		1,111,980	691,132
Interest expense	561,867		377,727	143,322
Income tax	2,774,204		3,529,253	2,542,080
Net profit (loss) attributable to equity holders of the parent	3,644,697		1,262,073	3,318,960
Assets by segment	102,531,547		88,672,466	93,941,695
Plant, property and equipment, net	38,011,242		32,173,524	33,854,428
Goodwill	14,186,723		14,186,723	14,186,723
Trademarks, net	249,984		262,641	284,665
Licenses and rights, net	10,294,336		7,276,039	7,694,798
Liabilities by segments	58,716,154		43,978,410	44,790,656
Operating segments [member] | Europe [member]
Disclosure of Operating Segments [Line Items]
External revenues	100,716,443		93,644,172	86,978,828
Total revenues	100,716,443		93,644,172	86,978,828
Depreciation and amortization	26,838,972		25,222,962	22,525,050
Operating income	4,731,562		4,523,857	5,388,595
Interest income	122,133		307,021	286,784
Interest expense	1,973,431		2,035,716	2,953,033
Income tax	707,093		(1,417,358)	(2,578,206)
Equity interest in net income (loss) of associated companies	(17,713)		(14,190)	29,528
Net profit (loss) attributable to equity holders of the parent	3,809,694		5,656,132	7,065,769
Assets by segment	186,135,358		203,858,243	227,288,156
Plant, property and equipment, net	80,421,642		85,116,608	78,763,065
Goodwill	53,066,729		53,143,542	52,207,877
Trademarks, net	3,313,948		8,116,076	10,203,880
Licenses and rights, net	27,344,273		31,141,255	30,670,315
Investment in associated companies	748,674		806,950	1,072,778
Liabilities by segments	117,214,746		119,240,533	121,928,202
Eliminations [member]
Disclosure of Operating Segments [Line Items]
Intersegment revenues	(45,334,907)		(32,330,734)	(30,530,489)
Total revenues	(45,334,907)		(32,330,734)	(30,530,489)
Depreciation and amortization	(992,802)		(422,170)	(333,232)
Operating income	(3,918,800)		(111,906)	592,587
Interest income	(36,295,212)		(39,338,076)	(33,897,656)
Interest expense	(34,302,793)		(37,558,496)	(33,033,597)
Income tax	(1,624)		(4,600)
Net profit (loss) attributable to equity holders of the parent	(2,006,979)		(2,795,698)	(5,594,432)
Assets by segment	(851,985,719)		(915,308,134)	(981,214,013)
Plant, property and equipment, net	(138,297)
Investment in associated companies	(3,847,209)		1,830,488	(7,393,181)
Liabilities by segments	$ (441,820,311)		$ (484,575,112)	$ (485,698,799)

Recently Issued Accounting St_2

Recently Issued Accounting Standards - Additional Information (Detail) - Increase (decrease) due to application of IFRS 16 [member]	Dec. 31, 2018MXN ($)
Bottom of range [member]
Disclosure of changes in accounting estimates [line items]
Right of use assets	$ 113,000,000
Lease liabilities	113,000,000
Top of range [member]
Disclosure of changes in accounting estimates [line items]
Right of use assets	132,000,000
Lease liabilities	$ 132,000,000

Subsequent Events - Additional

Subsequent Events - Additional Information (Detail) $ in Thousands, $ in Thousands	Jan. 24, 2019MXN ($)	Jan. 24, 2019USD ($)	Dec. 31, 2018MXN ($)	Dec. 31, 2018USD ($)	Mar. 18, 2019
Disclosure of non-adjusting events after reporting period [line items]
Percentage of agreement to acquire			80.00%	80.00%
Major business combination [member] | Telefnica Mviles Guatemala S A [member]
Disclosure of non-adjusting events after reporting period [line items]
Percentage of agreement to acquire	100.00%	100.00%
Purchase price paid	$ 6,326,068	$ 333,000
Major business combination [member] | Telefnica Mviles El Salvador S A de C V [member]
Disclosure of non-adjusting events after reporting period [line items]
Percentage of agreement to acquire	99.30%	99.30%
Purchase price paid	$ 5,984,118	$ 315,000
Major business combination [member] | Nextel Telecomunicacoes Ltda [member]
Disclosure of non-adjusting events after reporting period [line items]
Percentage of agreement to acquire					100.00%
Purchase price paid			$ 17,487,578	$ 905,000

Supplemental Guarantor Inform_3

Supplemental Guarantor Information - Condensed Consolidating Statements of Financial Position (Detail) $ in Thousands, $ in Millions	Dec. 31, 2018MXN ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017MXN ($)	Dec. 31, 2017USD ($)	Dec. 31, 2016MXN ($)	Dec. 31, 2015MXN ($)
Assets:
Cash and cash equivalents	$ 21,659,962	$ 1,100	$ 24,270,473	$ 1,233	$ 23,218,383	$ 45,160,032
Equity investments at fair value through OCI and other short-term investments	49,015,934	2,490	59,120,676
Accounts receivable and derivative financial instruments	221,514,468		201,813,528
Related parties	1,263,605	64	868,230
Inventories, net	40,305,362	2,048	38,809,565
Other current assets	15,296,193	777	17,352,746
Property, plant and equipment, net	640,000,720	32,516	676,343,198		701,190,066	573,528,878
Investments in associated companies	3,132,707	159	3,735,172		3,603,484
Intangible assets and other non- current assets, net	437,034,441		463,898,264
Total assets	1,429,223,392	72,613	1,486,211,852		1,515,042,274
Liabilities:
Short-term debt and current portion of long-term debt	96,230,634	4,889	51,745,841
Current liabilities	370,860,255		361,590,656
Long-term debt	542,691,819	27,572	646,139,058
Other non-current liabilities	173,568,262		166,102,780
Total liabilities	1,183,350,970	60,121	1,225,578,335		1,244,018,507
Equity attributable to equity holders of the parent	195,995,645	9,958	194,164,312
Non-controlling interests	49,876,777	2,534	66,469,205
Total equity	245,872,422	12,492	260,633,517		271,023,767	160,854,186
Total liabilities and equity	1,429,223,392	$ 72,613	1,486,211,852
Parent [member]
Assets:
Cash and cash equivalents	8,335,101		7,018,559		4,107,645	13,803,584
Equity investments at fair value through OCI and other short-term investments	9,511,368		10,303,535
Accounts receivable and derivative financial instruments	31,462,176		9,874,652
Related parties	199,566,671		208,240,067
Inventories, net	215,055		264,649
Other current assets			17,805,747
Property, plant and equipment, net	1,340,358		1,996,721
Investments in associated companies	734,944,344		747,771,790
Intangible assets and other non- current assets, net	4,113,902		4,104,268
Total assets	989,488,975		1,007,379,988
Liabilities:
Short-term debt and current portion of long-term debt	52,827,411		34,345,398
Current liabilities	153,489,868		161,940,198
Long-term debt	456,918,590		547,728,176
Other non-current liabilities	130,257,461		69,201,904
Total liabilities	793,493,330		813,215,676
Equity attributable to equity holders of the parent	195,995,645		194,164,312
Total equity	195,995,645		194,164,312
Total liabilities and equity	989,488,975		1,007,379,988
Wholly-owned guarantor subsidiary [member]
Assets:
Cash and cash equivalents	1,745,895		3,553,352		1,948,159	1,468,036
Accounts receivable and derivative financial instruments	35,671,582		24,064,936
Related parties	1,144,534		957,704
Inventories, net	18,495,502		16,700,837
Other current assets	1,218,764		922,245
Property, plant and equipment, net	23,192,546		24,287,904
Investments in associated companies	88,070,845		35,569,788
Intangible assets and other non- current assets, net	26,176,381		73,557,904
Total assets	195,716,049		179,614,670
Liabilities:
Current liabilities	72,282,238		41,304,845
Other non-current liabilities	109,368,210		132,728,838
Total liabilities	181,650,448		174,033,683
Equity attributable to equity holders of the parent	14,065,601		5,580,987
Total equity	14,065,601		5,580,987
Total liabilities and equity	195,716,049		179,614,670
Combined non-guarantor subsidiaries [member]
Assets:
Cash and cash equivalents	11,578,966		13,698,562		$ 17,162,579	$ 29,888,412
Equity investments at fair value through OCI and other short-term investments	39,504,566		48,817,141
Accounts receivable and derivative financial instruments	154,380,710		167,873,940
Related parties	560,142,367		503,895,549
Inventories, net	21,594,805		21,844,079
Other current assets	14,077,429		(1,375,246)
Property, plant and equipment, net	615,467,816		650,058,573
Investments in associated companies	16,926,615		3,457,152
Intangible assets and other non- current assets, net	406,744,158		386,236,092
Total assets	1,840,417,432		1,794,505,842
Liabilities:
Short-term debt and current portion of long-term debt	43,403,223		17,400,443
Current liabilities	597,174,025		797,880,314
Long-term debt	85,773,229		98,410,882
Other non-current liabilities	242,232,897		40,909,234
Total liabilities	968,583,374		954,600,873
Equity attributable to equity holders of the parent	760,485,332		741,988,231
Non-controlling interests	111,348,726		97,916,738
Total equity	871,834,058		839,904,969
Total liabilities and equity	1,840,417,432		1,794,505,842
Eliminations [member]
Assets:
Related parties	(759,589,967)		(712,225,090)
Investments in associated companies	(836,809,097)		(783,063,558)
Total assets	(1,596,399,064)		(1,495,288,648)
Liabilities:
Current liabilities	(452,085,876)		(639,534,701)
Other non-current liabilities	(308,290,306)		(76,737,196)
Total liabilities	(760,376,182)		(716,271,897)
Equity attributable to equity holders of the parent	(774,550,933)		(747,569,218)
Non-controlling interests	(61,471,949)		(31,447,533)
Total equity	(836,022,882)		(779,016,751)
Total liabilities and equity	$ (1,596,399,064)		$ (1,495,288,648)

Supplemental Guarantor Inform_4

Supplemental Guarantor Information - Condensed Consolidating Statements of Comprehensive Income (Detail) $ in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2018MXN ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017MXN ($)	Dec. 31, 2016MXN ($)
Disclosure of information about consolidated structured entities [line items]
Total revenues	$ 1,038,207,681	$ 52,747	$ 1,021,633,535	$ 975,412,488
Total cost and operating expenses	898,650,510	45,657	921,490,232	865,802,178
Operating income	139,557,171	7,090	100,143,303	109,610,310
Interest (expense) income, net	(21,125,264)		(27,375,133)	(29,669,417)
Foreign currency exchange (loss) gain, net	(7,261,956)		(13,818,951)	(40,427,407)
Other financing cost, net	(10,176,316)		(1,943,760)	(16,225,841)
Income tax	46,477,079	2,361	24,941,511	11,398,856
Equity interest in net income of associated companies	267		91,385	189,950
Net profit (loss)	54,516,823		32,155,333	12,078,739
Distribution of the net profit (loss) to:
Equity owners of holding company	52,566,197	2,670	29,325,921	8,649,427
Non-controlling interest	1,950,626	100	2,829,412	3,429,312
Net profit (loss)	54,516,823		32,155,333	12,078,739
Net other comprehensive income (loss) to be reclassified to profit or loss in subsequent years:
Effect of translation of foreign entities	(64,314,032)	(3,268)	(18,309,877)	107,498,708
Effect of fair value of derivatives, net of deferred taxes			12,292	49,129
Items not to be reclassified to profit or loss in subsequent years:
Remeasurement of defined benefit plan, net of income tax effect	757,278	38	(7,046,089)	14,773,399
Equity investments at fair value	(3,765,688)	(191)	622,424	(6,673,731)
Total other comprehensive income (loss) items for the year, net of deferred taxes	(67,322,442)	(3,421)	(24,721,250)	115,647,505
Total comprehensive income (loss) for the year	(12,805,619)	(651)	7,434,083	127,726,244
Comprehensive income for the period attributable to:
Equity holders of the parent	(11,770,227)	(598)	1,201,698	120,974,842
Non-controlling interests	(1,035,392)	(53)	6,232,385	6,751,402
Total comprehensive income (loss) for the year	(12,805,619)	$ (651)	7,434,083	127,726,244
Parent [member]
Disclosure of information about consolidated structured entities [line items]
Total revenues	170,887,145		160,057,511	137,236,301
Total cost and operating expenses	129,039,749		123,548,341	117,835,634
Operating income	41,847,396		36,509,170	19,400,667
Interest (expense) income, net	(24,831,538)		(16,779,235)	(12,331,095)
Foreign currency exchange (loss) gain, net	11,805,283		(15,223,111)	(46,625,392)
Other financing cost, net	(4,443,892)		6,775,455	(10,475,673)
Income tax	17,754,010		14,201,399	(7,712,179)
Equity interest in net income of associated companies	46,101,188		32,245,041	50,968,741
Net profit (loss)	52,724,427		29,325,921	8,649,427
Distribution of the net profit (loss) to:
Equity owners of holding company	52,724,427		29,325,921	8,649,427
Net profit (loss)	52,724,427		29,325,921	8,649,427
Net other comprehensive income (loss) to be reclassified to profit or loss in subsequent years:
Effect of translation of foreign entities	(61,223,458)		(21,683,333)	104,178,880
Effect of fair value of derivatives, net of deferred taxes			12,292	48,496
Items not to be reclassified to profit or loss in subsequent years:
Remeasurement of defined benefit plan, net of income tax effect	652,722		(7,075,606)	14,771,770
Equity investments at fair value	(3,765,688)		622,424	(6,673,731)
Total other comprehensive income (loss) items for the year, net of deferred taxes	(64,336,424)		(28,124,223)	112,325,415
Total comprehensive income (loss) for the year	(11,611,997)		1,201,698	120,974,842
Comprehensive income for the period attributable to:
Equity holders of the parent	(11,611,997)		1,201,698	120,974,842
Total comprehensive income (loss) for the year	(11,611,997)		1,201,698	120,974,842
Wholly-owned guarantor subsidiary [member]
Disclosure of information about consolidated structured entities [line items]
Total revenues	190,924,413		170,991,493	173,714,225
Total cost and operating expenses	183,542,058		163,152,868	160,949,691
Operating income	7,382,355		7,838,625	12,764,534
Interest (expense) income, net	(11,033,069)		(12,365,116)	97,314
Foreign currency exchange (loss) gain, net	626,304		1,320,667	(5,853,669)
Other financing cost, net				(11,203,533)
Income tax	798,639		1,386,519	1,139,631
Equity interest in net income of associated companies	1,325,723		(8,977,146)	(1,342,073)
Net profit (loss)	(2,497,326)		(13,569,489)	(6,677,058)
Distribution of the net profit (loss) to:
Equity owners of holding company	(2,497,326)		(13,569,489)	(6,677,058)
Net profit (loss)	(2,497,326)		(13,569,489)	(6,677,058)
Net other comprehensive income (loss) to be reclassified to profit or loss in subsequent years:
Effect of translation of foreign entities	(724,521)		(1,897,936)	755,978
Items not to be reclassified to profit or loss in subsequent years:
Remeasurement of defined benefit plan, net of income tax effect	(1,603,145)		(8,439)	(12,300)
Total other comprehensive income (loss) items for the year, net of deferred taxes	(2,327,666)		(1,906,375)	743,678
Total comprehensive income (loss) for the year	(4,824,992)		(15,475,864)	(5,933,380)
Comprehensive income for the period attributable to:
Equity holders of the parent	(4,824,992)		(15,475,864)	(5,933,380)
Total comprehensive income (loss) for the year	(4,824,992)		(15,475,864)	(5,933,380)
Combined non-guarantor subsidiaries [member]
Disclosure of information about consolidated structured entities [line items]
Total revenues	890,427,121		887,951,615	857,137,822
Total cost and operating expenses	799,085,884		832,429,198	778,483,079
Operating income	91,341,237		55,522,417	78,654,743
Interest (expense) income, net	14,757,906		1,810,523	(17,207,855)
Foreign currency exchange (loss) gain, net	(19,693,543)		83,493	12,051,654
Other financing cost, net	(5,732,424)		(8,719,215)	5,453,365
Income tax	27,924,430		9,353,593	17,971,404
Equity interest in net income of associated companies	(2,497,059)		(13,466,845)	(6,677,059)
Net profit (loss)	50,251,687		25,876,780	54,303,444
Distribution of the net profit (loss) to:
Equity owners of holding company	46,641,696		21,417,549	50,049,280
Non-controlling interest	3,609,991		4,459,231	4,254,164
Net profit (loss)	50,251,687		25,876,780	54,303,444
Net other comprehensive income (loss) to be reclassified to profit or loss in subsequent years:
Effect of translation of foreign entities	(64,314,032)		(18,309,877)	108,291,984
Effect of fair value of derivatives, net of deferred taxes			12,292	30,206
Items not to be reclassified to profit or loss in subsequent years:
Remeasurement of defined benefit plan, net of income tax effect	757,278		(7,046,089)	7,477,926
Equity investments at fair value	(3,765,688)		622,424	(6,673,731)
Total other comprehensive income (loss) items for the year, net of deferred taxes	(67,322,442)		(24,721,250)	109,126,385
Total comprehensive income (loss) for the year	(17,070,755)		1,155,530	163,429,829
Comprehensive income for the period attributable to:
Equity holders of the parent	(16,035,363)		(5,076,855)	150,900,984
Non-controlling interests	(1,035,392)		6,232,385	12,528,845
Total comprehensive income (loss) for the year	(17,070,755)		1,155,530	163,429,829
Eliminations [member]
Disclosure of information about consolidated structured entities [line items]
Total revenues	(214,030,998)		(197,367,084)	(192,675,860)
Total cost and operating expenses	(213,017,181)		(197,640,175)	(191,466,226)
Operating income	(1,013,817)		273,091	(1,209,634)
Interest (expense) income, net	(18,563)		(41,305)	(227,781)
Equity interest in net income of associated companies	(44,929,585)		(9,709,665)	(42,759,659)
Net profit (loss)	(45,961,965)		(9,477,879)	(44,197,074)
Distribution of the net profit (loss) to:
Equity owners of holding company	(44,302,600)		(7,848,060)	(43,372,222)
Non-controlling interest	(1,659,365)		(1,629,819)	(824,852)
Net profit (loss)	(45,961,965)		(9,477,879)	(44,197,074)
Net other comprehensive income (loss) to be reclassified to profit or loss in subsequent years:
Effect of translation of foreign entities	61,947,979		23,581,269	(105,728,134)
Effect of fair value of derivatives, net of deferred taxes			(12,292)	(29,573)
Items not to be reclassified to profit or loss in subsequent years:
Remeasurement of defined benefit plan, net of income tax effect	950,423		7,084,045	(7,463,997)
Equity investments at fair value	3,765,688		(622,424)	6,673,731
Total other comprehensive income (loss) items for the year, net of deferred taxes	66,664,090		30,030,598	(106,547,973)
Total comprehensive income (loss) for the year	20,702,125		20,552,719	(150,745,047)
Comprehensive income for the period attributable to:
Equity holders of the parent	20,702,125		20,552,719	(144,967,604)
Non-controlling interests				(5,777,443)
Total comprehensive income (loss) for the year	$ 20,702,125		$ 20,552,719	$ (150,745,047)

Supplemental Guarantor Inform_5

Supplemental Guarantor Information - Condensed Consolidating Statements of Cash Flows (Detail) $ in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2018MXN ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017MXN ($)	Dec. 31, 2016MXN ($)
Operating activities:
Profit before taxes	$ 100,993,902	$ 5,131	$ 57,096,844	$ 23,477,595
Non-cash items	187,192,818		195,680,543	228,623,927
Changes in working capital:	(39,856,192)		(35,005,012)	(16,303,468)
Net cash flows provided by operating activities	248,330,528	12,617	217,772,375	235,798,054
Investing activities:
Purchase of property, plant and equipment	(143,888,033)	(7,310)	(119,185,137)	(138,707,157)
Acquisition of intangibles	(7,933,647)	(403)	(17,538,541)	(16,316,738)
Dividends received from associates	2,622,237		2,385,559	5,740,092
Proceeds from sale of plant, property and equipment	178,532	9	133,349	115,600
Acquisition of business, net of cash acquired	(310,604)	(16)	(6,878,793)	(1,823,813)
Partial sale of shares of associate company	548,484	28	340,040
Investment in associates companies				(3,487)
Net cash flows provided by (used in) investing activities	(148,783,031)	(7,559)	(140,743,523)	(150,995,503)
Financing activities:
Bank loans, net	(34,050,923)		(27,433,489)	(61,390,813)
Acquisition of no controlling interest	(115,821)	(6)	(11,930)	(2,280,278)
Interest paid	(30,869,017)	(1,568)	(31,196,441)	(32,125,872)
Sale of shares of subsidiaries				6,323,336
Repurchase of shares and others	(511,421)	(26)	(1,233,371)	(7,021,247)
Payment of dividends	(22,369,793)	(1,137)	(16,091,390)	(13,809,957)
Derivative financial instruments			(71,474)	(351,213)
Redemption of hybrid bond	(13,440,120)	(683)
Net cash flows used in financing activities	(101,357,095)	(5,150)	(76,038,095)	(110,656,044)
Net (decrease) increase in cash and cash equivalents	(1,809,598)	(92)	990,757	(25,853,493)
Adjustment to cash flow for exchange rate differences	(800,913)	(41)	61,333	3,911,844
Cash and cash equivalents at beginning of the period	24,270,473	1,233	23,218,383	45,160,032
Cash and cash equivalents at end of the period	21,659,962	$ 1,100	24,270,473	23,218,383
Parent [member]
Operating activities:
Profit before taxes	70,478,437		43,527,320	937,247
Non-cash items	(23,099,316)		(17,017,287)	(997,587)
Changes in working capital:	(49,040,542)		(18,973,478)	74,520,320
Net cash flows provided by operating activities	(1,661,421)		7,536,555	74,459,980
Investing activities:
Purchase of property, plant and equipment	(17,709)		16,526
Dividends received from associates	24,314,803		21,465,687	21,950
Proceeds from sale of plant, property and equipment				20,078
Partial sale of shares of associate company				756,444
Net cash flows provided by (used in) investing activities	24,297,094		21,482,213	798,472
Financing activities:
Bank loans, net	24,784,341		13,548,138	(39,598,698)
Interest paid	(24,802,363)		(24,009,216)	(24,826,139)
Repurchase of shares and others	(514,007)		(1,240,028)	(7,092,385)
Payment of dividends	(20,787,102)		(14,406,748)	(13,437,168)
Net cash flows used in financing activities	(21,319,131)		(26,107,854)	(84,954,390)
Net (decrease) increase in cash and cash equivalents	1,316,542		2,910,914	(9,695,938)
Cash and cash equivalents at beginning of the period	7,018,559		4,107,645	13,803,584
Cash and cash equivalents at end of the period	8,335,101		7,018,559	4,107,645
Wholly-owned guarantor subsidiary [member]
Operating activities:
Profit before taxes	(1,698,687)		(12,182,970)	(5,537,427)
Non-cash items	20,952,414		30,000,109	19,800,396
Changes in working capital:	(35,329,228)		(9,486)	9,130,768
Net cash flows provided by operating activities	(16,075,501)		17,807,653	23,393,737
Investing activities:
Purchase of property, plant and equipment	(4,031,228)		(5,571,410)	(7,860,232)
Acquisition of intangibles	(2,993,373)		(3,053,345)	(4,947,506)
Dividends received from associates			970,000
Acquisition of business, net of cash acquired			(3,381,505)	(2,796,254)
Investment in associates companies	(5,092,881)		1,925,898	663,203
Net cash flows provided by (used in) investing activities	(12,117,482)		(9,110,362)	(14,940,789)
Financing activities:
Interest paid	26,385,526		(7,092,098)	(7,972,827)
Net cash flows used in financing activities	26,385,526		(7,092,098)	(7,972,827)
Net (decrease) increase in cash and cash equivalents	(1,807,457)		1,605,193	480,121
Cash and cash equivalents at beginning of the period	3,553,352		1,948,159	1,468,036
Cash and cash equivalents at end of the period	1,745,895		3,553,352	1,948,159
Combined non-guarantor subsidiaries [member]
Operating activities:
Profit before taxes	78,176,117		35,230,373	28,077,775
Non-cash items	149,503,016		171,062,158	209,821,118
Changes in working capital:	(61,332,380)		(66,062,629)	(93,359,195)
Net cash flows provided by operating activities	166,346,753		140,229,902	144,539,698
Investing activities:
Purchase of property, plant and equipment	(139,839,096)		(113,630,253)	(130,846,925)
Acquisition of intangibles	(4,940,274)		(14,485,196)	(11,369,232)
Dividends received from associates	2,622,237		2,385,559	5,988,938
Proceeds from sale of plant, property and equipment	178,532		133,349	95,522
Acquisition of business, net of cash acquired	(310,604)		(3,497,288)	(1,823,813)
Partial sale of shares of associate company	548,484		340,040	2,796,254
Investment in associates companies				(666,690)
Net cash flows provided by (used in) investing activities	(141,740,721)		(128,753,789)	(135,825,946)
Financing activities:
Bank loans, net	19,592,788		16,382,838	(21,792,115)
Acquisition of no controlling interest	(115,821)		(11,930)	(2,280,278)
Interest paid	(6,066,654)		(7,187,225)	(5,922,267)
Paid-In capital				(756,444)
Sale of shares of subsidiaries				6,323,336
Repurchase of shares and others	2,586		6,657	71,138
Payment of dividends	(25,897,494)		(24,120,329)	(643,585)
Derivative financial instruments			(71,474)	(351,213)
Redemption of hybrid bond	(13,440,120)
Net cash flows used in financing activities	(25,924,715)		(15,001,463)	(25,351,428)
Net (decrease) increase in cash and cash equivalents	(1,318,683)		(3,525,350)	(16,637,676)
Adjustment to cash flow for exchange rate differences	(800,913)		61,333	3,911,844
Cash and cash equivalents at beginning of the period	13,698,562		17,162,579	29,888,412
Cash and cash equivalents at end of the period	11,578,966		13,698,562	17,162,579
Eliminations [member]
Operating activities:
Profit before taxes	(45,961,965)		(9,477,879)
Non-cash items	39,836,704		11,635,563
Changes in working capital:	105,845,958		50,040,581	(6,595,361)
Net cash flows provided by operating activities	99,720,697		52,198,265	(6,595,361)
Investing activities:
Dividends received from associates	(24,314,803)		(22,435,687)	(270,796)
Acquisition of business, net of cash acquired				2,796,254
Partial sale of shares of associate company				(3,552,698)
Investment in associates companies	5,092,881		(1,925,898)
Net cash flows provided by (used in) investing activities	(19,221,922)		(24,361,585)	(1,027,240)
Financing activities:
Bank loans, net	(78,428,052)		(57,364,465)
Interest paid	(26,385,526)		7,092,098	6,595,361
Paid-In capital				756,444
Payment of dividends	24,314,803		22,435,687	270,796
Net cash flows used in financing activities	$ (80,498,775)		$ (27,836,680)	$ 7,622,601