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Bank Loans and Notes Payable - Rollforward, Liabilities Arising from Financing Activities (Detail) - MXN ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Disclosure of reconciliation of liabilities arising from financing activities [line items] |  |  |
Beginning balance | $ 172,630 | $ 178,884 |
Cash Flows | 56,283 | (16,869) |
Non-cash flows, Acquisition | 1,765 | 4,104 |
Non-cash flows, New leases | 7,982 | 7,490 |
Non-cash flows, Foreign Exchange movement | 4,450 | (1,651) |
Non-cash flows, Others | 3,863 | 672 |
Ending balance | 246,972 | 172,630 | $ 178,884
Total Liabilities From Financing Activities [Member] |  |  |
Disclosure of reconciliation of liabilities arising from financing activities [line items] |  |  |
Beginning balance | 117,951 | 128,664 | 131,348
Cash Flows | 66,093 | (8,021) | (1,027)
Non-cash flows, Acquisition |  | 1,917 | 1,147
Non-cash flows, Foreign Exchange movement | 5,034 | (1,641) | (362)
Non-cash flows, Others | (413) | (2,968) | (2,442)
Ending balance | 188,664 | 117,951 | 128,664
Bank loans, short-term |  |  |
Disclosure of reconciliation of liabilities arising from financing activities [line items] |  |  |
Beginning balance | 20,807 | 22,944 | 13,669
Cash Flows | (1,286) | (2,999) | 8,313
Non-cash flows, Acquisition |  | 1,917 | 1,147
Non-cash flows, Foreign Exchange movement | 221 | (397) | 417
Non-cash flows, Others | (312) | (658) | (602)
Ending balance | 19,430 | 20,807 | 22,944
Notes payable [member] |  |  |
Disclosure of reconciliation of liabilities arising from financing activities [line items] |  |  |
Beginning balance | 97,144 | 105,720 |
Cash Flows | 67,380 | (5,022) |
Non-cash flows, Foreign Exchange movement | 4,813 | (1,244) |
Non-cash flows, Others | (101) | (2,310) |
Ending balance | 169,235 | 97,144 | 105,720
Notes Payable Excluding Financing Lease Liabilities [Member] |  |  |
Disclosure of reconciliation of liabilities arising from financing activities [line items] |  |  |
Beginning balance |  | 105,628 | 117,551
Cash Flows |  |  | (9,314)
Non-cash flows, Foreign Exchange movement |  |  | (769)
Non-cash flows, Others |  |  | (1,840)
Ending balance |  |  | 105,628
Financing Lease Liabilities [Member] |  |  |
Disclosure of reconciliation of liabilities arising from financing activities [line items] |  |  |
Beginning balance | 54,679 | 50,220 |
Cash Flows |  | (8,848) |
Non-cash flows, Acquisition |  | 2,187 |
Non-cash flows, New leases |  | 7,490 |
Non-cash flows, Foreign Exchange movement |  | (10) |
Non-cash flows, Others |  | 3,640 |
Ending balance |  | 54,679 | 50,220
Financial leases [member] |  |  |
Disclosure of reconciliation of liabilities arising from financing activities [line items] |  |  |
Beginning balance | 54,679 | 92 | 128
Cash Flows | (9,810) | (8,848) | (26)
Non-cash flows, Acquisition | 1,765 |  |
Non-cash flows, New leases | 7,982 |  |
Non-cash flows, Foreign Exchange movement | (584) |  | (10)
Non-cash flows, Others | 4,276 |  |
Ending balance | $ 58,308 | $ 54,679 | $ 92

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- Definition The amount of liabilities that are: (a) a contractual obligation: (i) to deliver cash or another financial asset to another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially unfavourable to the entity; or (b) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to deliver a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose, rights, options or warrants to acquire a fixed number of the entity’s own equity instruments for a fixed amount of any currency are equity instruments if the entity offers the rights, options or warrants pro rata to all of its existing owners of the same class of its own non-derivative equity instruments. Also, for those purposes the entity’s own equity instruments do not include puttable financial instruments that are classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. As an exception, an instrument that meets the definition of a financial liability is classified as an equity instrument if it has all the features and meets the conditions in paragraphs 16A-16B or paragraphs 16C-16D of IAS 32. [Refer: Financial instruments, class [member]; Financial assets; Derivatives [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph 25 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2020-en-r&anchor=para_25&doctype=Standard -URIDate 2020-01-01 + Details
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