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Business Combinations, Acquisitions and Non-controlling Interest - Summary of Consolidated Statements of Comprehensive Income (Detail)
$ in Thousands, $ in Millions
 12 Months Ended
Dec. 31, 2021
MXN ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
MXN ($)
Dec. 31, 2019
MXN ($)
Disclosure of detailed information about business combination [line items]        
Operating costs and expenses $ 689,402,230 $ 33,494 $ 694,203,781 [1] $ 707,685,192 [1]
Operating income 166,132,641 8,070 145,503,379 [1] 143,798,284 [1]
Net income 196,326,114 9,538 51,026,957 [1] 70,313,454 [1]
Total comprehensive income 204,185,563 9,920 104,489,719 [1] 6,124,939 [1]
Distribution of the net profit (loss) to:        
Equity holders of the parent 192,423,167   46,852,605 67,730,890
Non-controllinginterest 3,902,947 190 4,174,352 [1] 2,582,564 [1]
Net income 196,326,114 9,538 51,026,957 [1] 70,313,454 [1]
Comprehensive income (loss) for the year attributable to:        
Non-controllinginterest 1,767,061 86 18,339,601 [1] 674,260 [1]
Total comprehensive income (loss) for the year 204,185,563 $ 9,920 104,489,719 [1] 6,124,939 [1]
Subsidiaries with material non-controlling interests [member]        
Disclosure of detailed information about business combination [line items]        
Operating revenues 113,838,487   111,472,191 98,420,289
Operating costs and expenses 98,346,896   98,312,325 89,732,428
Operating income 15,491,591   13,159,866 8,687,861
Net income 9,104,962   7,787,388 5,051,145
Total comprehensive income 7,790,499   12,103,406 1,466,783
Distribution of the net profit (loss) to:        
Equity holders of the parent 4,629,816   3,986,412 2,565,733
Non-controllinginterest 4,475,146   3,800,976 2,485,412
Net income 9,104,962   7,787,388 5,051,145
Comprehensive income (loss) for the year attributable to:        
Equity holders of the parent 3,973,154   6,172,737 748,059
Non-controllinginterest 3,817,345   5,930,669 718,724
Total comprehensive income (loss) for the year $ 7,790,499   $ 12,103,406 $ 1,466,783
[1] Restated for discontinued operations.