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Retained Earnings and Accumulated Other Comprehensive Income - Accumulated Other Comprehensive Income (Details) - MXN ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Accumulated at beginning $ (15,556,848)  
Accumulated at ending (13,621,992) $ (15,556,848)
Accumulated Other Comprehensive Income (loss)    
Accumulated at beginning (15,556,848) 1,320,451
Changes in other comprehensive income 1,934,856 (16,877,299)
Accumulated at ending (13,621,992) (15,556,848)
Open Ended Fund    
Accumulated at beginning 1,524,860 2,429,283
Changes in other comprehensive income (19,718) (904,423)
Accumulated at ending 1,505,142 1,524,860
Other Equity Instruments    
Accumulated at beginning 638,406 991,902
Changes in other comprehensive income (123,359) (353,496)
Accumulated at ending 515,047 638,406
Warrants Exercisable for Common Stock of UHI    
Accumulated at beginning (23,602,220) (1,703,056)
Changes in other comprehensive income   (21,899,164)
Accumulated at ending (23,602,220) (23,602,220)
Exchange Differences on Translating Foreign Operations    
Accumulated at beginning 850,241 734,676
Changes in other comprehensive income 84,232 115,565
Accumulated at ending 934,473 850,241
Remeasurement of Post-Employment Benefit Obligations    
Accumulated at beginning (1,350,451) (1,010,132)
Changes in other comprehensive income 291,697 (340,319)
Accumulated at ending (1,058,754) (1,350,451)
Derivative Financial Instruments Cash Flow Hedges    
Accumulated at beginning (1,915,508) (545,363)
Changes in other comprehensive income 1,927,601 (1,370,145)
Accumulated at ending 12,093 (1,915,508)
Share of Income (Loss) of Associates and Joint Ventures    
Accumulated at beginning (136,448) (75,415)
Changes in other comprehensive income 245,714 (61,033)
Accumulated at ending 109,266 (136,448)
Income Tax    
Accumulated at beginning 8,434,272 498,556
Changes in other comprehensive income (471,311) 7,935,716
Accumulated at ending $ 7,962,961 $ 8,434,272