XML 165 R92.htm IDEA: XBRL DOCUMENT v3.21.1
Income Taxes - Summary of Reconciliation of Deferred Tax Assets and Liabilities, Net (Detail)
$ in Thousands, $ in Millions
 12 Months Ended
Dec. 31, 2020
MXN ($)
Dec. 31, 2019
MXN ($)
Dec. 31, 2018
MXN ($)
Dec. 31, 2020
MXN ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
MXN ($)
Dec. 31, 2018
MXN ($)
Reconciliation of changes in deferred tax liability (asset) [abstract]              
Deferred Tax (Liability) Asset Beginning Balance $ 88,074,856 $ 86,613,327 $ 104,573,985        
Deferred tax benefit 12,292,014 (3,894,383) 1,994,063        
Translation effect 375,105 2,047,915 (8,854,010)        
Deferred tax benefit recognized in OCI (26,472,481) 8,838,714 2,013,480        
Deferred taxes acquired in business combinations (2,580,552) (276,568) (25,827)        
Hyperinflationary effect in Argentina (5,385,865) (5,254,149) (4,907,151)        
Effect of adoption of IFRS 9     544,628        
Effect of adoption of IFRS 15     (8,725,841)        
Deferred tax (liability) asset ending balance 66,303,077 88,074,856 86,613,327        
Presented in the consolidated statements of financial position as follows:              
Deferred income tax assets       $ 115,370,240 $ 5,783 $ 106,167,897 $ 111,186,768
Deferred income tax liabilities       (49,067,163) $ (2,460) (18,093,041) (24,573,441)
Deferred tax assets and liabilities, net $ 88,074,856 $ 86,613,327 $ 104,573,985 $ 66,303,077   $ 88,074,856 $ 86,613,327