Other Assets, Net - Summary of Analysis of Other Assets (Parenthetical) (Detail) - MXN ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Disclosure of Other Assets [line items]
Judicial deposits	$ 15,402,840	$ 19,506,147
Brazil [member]
Disclosure of Other Assets [line items]
Judicial deposits	$ 15,402,840	$ 19,506,147

The amount of non-current non-cash collateral assets (such as debt or equity instruments) provided to a transferee, for which the transferee has the right by contract or custom to sell or repledge the collateral.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 9
-IssueDate 2020-01-01
-Paragraph 3.2.23
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=9&code=ifrs-tx-2020-en-r&anchor=para_3.2.23_a&doctype=Standard
-URIDate 2020-01-01

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Note Expiry date 2021-01-01
-Name IAS
-Number 39
-IssueDate 2020-01-01
-Paragraph 37
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=39&code=ifrs-tx-2017-en-b&anchor=para_37_a&doctype=Standard&book=b
-URIDate 2020-01-01

Name:	ifrs-full_NoncurrentNoncashAssetsPledgedAsCollateralForWhichTransfereeHasRightByContractOrCustomToSellOrRepledgeCollateral
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant