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Taxes - Net Deferred Income Tax Asset Rollforward (Details) - MXN ($) $ in Millions | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Major components of tax expense (income) [abstract] |  |  |
Balance at the beginning of the period | $ (16,010) | $ (13,575) | $ (10,657)
Deferred tax provision for the period | 622 | (3,871) | (1,176)
Deferred tax income net recorded in share of the profit of equity method accounted investees | 277 | (404) | (406)
Acquisition of subsidiaries |  | (1) | 382
Unrealized (gain) on cash flow hedges | 1,006 | 865 | (391)
Exchange differences on translation of foreign operations | (491) | 2,215 | (2,121)
Remeasurements of the net defined benefit liability | 380 | (256) | (204)
Retained earnings of equity accounted investees | 32 | (33) | 384
Restatement effect of the period and beginning balances associated with hyperinflationary economies | (507) | (953) | 1,378
Balance at the end of the period | $ (14,691) | $ (16,010) | $ (13,575)

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- Definition Deferred tax assets relating to provisions. + References No definition available. + Details
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- Definition The increase (decrease) in deferred tax liability (asset) resulting from the net exchange differences arising when the financial statements are translated from the functional currency into a different presentation currency, including the translation of a foreign operation into the presentation currency of the reporting entity. [Refer: Deferred tax liability (asset)] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 12 -IssueDate 2021-01-01 -Paragraph 81 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2021-en-r&anchor=para_81&doctype=Standard -URIDate 2021-03-24 + Details
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