Capital securities redemption Period.

No definition available.

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- Definition

Consolidated ratio of debt to Ebitda.

+ References

No definition available.

+ Details

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- Definition

Consolidated Ratio Of EBITDA To Interest Paid.

+ References

No definition available.

+ Details

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- Definition

Number of undrawn revoloving syndicated facilities.

+ References

No definition available.

+ Details

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- Definition

Percentage of leverage for equity credit.

+ References

No definition available.

+ Details

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- Definition

Tax withholding percentage.

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
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Period Type:	duration

- Definition

The amount of outstanding funds that the entity is obligated to repay.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
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-IssueDate 2017-01-01
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-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_55&doctype=Standard
-URIDate 2017-03-09

+ Details

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- Definition

The interest rate on borrowings. [Refer: Borrowings]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-URIDate 2017-03-09

+ Details

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- Definition

The maturity of borrowings. [Refer: Borrowings]

+ References

+ Details

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- Definition

The currency in which the borrowings are denominated. [Refer: Borrowings]

+ References

+ Details

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- Definition

The weighted average of interest and other costs that an entity incurs in connection with the borrowing of funds applicable to the borrowings of the entity that are outstanding during the period, other than borrowings made specifically for the purpose of obtaining a qualifying asset. [Refer: Weighted average [member]; Borrowings]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-URIDate 2017-03-09

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- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

+ References

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
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- Definition

The amount of loans received.

+ References

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

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Debt - Additional Information (Detail) $ in Thousands, € in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2017 MXN ($) CreditFacility	Dec. 31, 2016 MXN ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2017 EUR (€)
Disclosure of detailed information about borrowings [line items]
Weighted average cost of borrowed funds	4.30%	4.20%
Borrowings	$ 697,884,899	$ 707,801,403
Number of undrawn revolving syndicated facilities \| CreditFacility	2
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	$ 49,148,975	$ 45,685,060
Borrowings, maturity	2073	2073
Hybrid Notes [member] \| Euros [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	$ 34,443,203	$ 31,614,659
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	5.125%		5.125%	5.125%
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%
Senior Notes 1 [member] \| Euros [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	$ 263,998,076	$ 270,240,624
Lines of credit [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	$ 31,364,000	33,999,000
Lines of credit [member] \| Euros [member]
Disclosure of detailed information about borrowings [line items]
Borrowings		$ 491,144
Borrowings, maturity		2018
Borrowings interest rate		3.525%
Mexico [member]
Disclosure of detailed information about borrowings [line items]
Commissions or the reimbursements for Mexican tax withholdings	4.90%	4.90%
Domestic Senior Notes [member] \| Senior Notes 1 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	$ 40,255,000	$ 21,044,000