Bank Loans and Notes Payable - Interest Expense (Details) $ in Millions, $ in Millions	12 Months Ended
Dec. 31, 2021 USD ($)	Dec. 31, 2021 MXN ($)	Dec. 31, 2020 MXN ($)	Dec. 31, 2019 MXN ($)
Disclosure of detailed information about borrowings [abstract]
Interest on debts and borrowings		$ 9,356	$ 10,789	$ 6,434
Finance charges for employee benefits, net		476	456	382
Derivative instruments		1,970	1,428	2,300
Finance operating charges		18	(231)	243
Finance charges payable for leases		5,118	5,074	4,774
Total	$ 826	$ 16,938	$ 17,516	$ 14,133

The amount of expense arising from interest.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 8
-IssueDate 2021-01-01
-Paragraph 23
-Subparagraph d
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2021-en-r&anchor=para_23_d&doctype=Standard
-URIDate 2021-03-24

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 8
-IssueDate 2021-01-01
-Paragraph 28
-Subparagraph e
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2021-en-r&anchor=para_28_e&doctype=Standard
-URIDate 2021-03-24

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 12
-IssueDate 2021-01-01
-Paragraph B13
-Subparagraph f
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2021-en-r&anchor=para_B13_f&doctype=Appendix&subtype=B
-URIDate 2021-03-24

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Balance Type:	debit
Period Type:	duration