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Changes in Accounting Policies Required by the Initial Application of IFRS 9, IFRS 15 and IFRS 16 - Operating Leases and Financial Leases (Details) - MXN ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Impact on Consolidated Financial Statements
Right-of-use assets, net	$ 7,212,165	$ 7,553,052		$ 8,200,181
Lease liabilities	(9,292,351)	(9,363,520)
Current portion of lease liabilities	1,277,754	1,257,766
IFRS 16
Impact on Consolidated Financial Statements
Lease liabilities	(4,745,292)	(4,745,292)	$ (10,115,256)	$ (4,641,705)
Operating Leases | IFRS 16
Impact on Consolidated Financial Statements
Right-of-use assets, net	4,392,420	4,502,590	4,797,312
Lease liabilities	(4,745,292)	(4,641,705)	(4,797,312)
Net effect	(352,872)	(139,115)
Current portion of lease liabilities	524,458	533,260	462,513
Depreciation of right-of-use assets	670,749	651,675
Finance Leases | IFRS 16
Impact on Consolidated Financial Statements
Right-of-use assets, net	2,819,745	3,050,462	3,402,869
Lease liabilities	(4,547,059)	(4,721,815)	(5,317,944)
Net effect	(1,727,314)	(1,671,353)	(1,915,075)
Current portion of lease liabilities	753,296	754,506	$ 651,800
Depreciation of right-of-use assets	$ 426,025	$ 418,675

X

- Definition

The amount of current lease liabilities. [Refer: Lease liabilities]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2020-01-01
-Paragraph 47
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2020-en-r&anchor=para_47_b&doctype=Standard
-URIDate 2020-01-01

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

The amount of depreciation of right-of-use assets. [Refer: Depreciation and amortisation expense; Right-of-use assets]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2020-01-01
-Paragraph 53
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2020-en-r&anchor=para_53_a&doctype=Standard
-URIDate 2020-01-01

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X

- Definition

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

+ References

No definition available.

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X

- Definition

The amount of liabilities related to the entity's leases. Lease is a contract, or part of a contract, that conveys the right to use an underlying asset for a period of time in exchange for consideration.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2020-01-01
-Paragraph 47
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2020-en-r&anchor=para_47_b&doctype=Standard
-URIDate 2020-01-01

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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X

- Definition

The amount of assets that represent a lessee's right to use an underlying asset for the lease term. Underlying asset is an asset that is the subject of a lease, for which the right to use that asset has been provided by a lessor to a lessee.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2020-01-01
-Paragraph 53
-Subparagraph j
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2020-en-r&anchor=para_53_j&doctype=Standard
-URIDate 2020-01-01

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X

- Definition

The net amount of right -of-use assets and lease liabilities.

+ References

No definition available.

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