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Right-of-use assets and liability related to right-of-use of assets - Schedule of detailed information about right-of-use assets and lease liabilities (Detail)
$ in Thousands, $ in Millions
 12 Months Ended
Dec. 31, 2023
MXN ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
MXN ($)
Dec. 31, 2021
MXN ($)
Disclosure Right of use Assets and Lease liabilities [Line Items]        
As of January 1 $ 121,874,096   $ 90,372,393  
As of January 1 121,874,096   90,372,393 $ 101,976,844
Additions and release 15,355,610   48,996,728 4,680,419
Business combinations     4,252,773  
Modifications 23,807,386   17,235,004 12,968,719
Depreciation (31,839,050)   (28,984,861) (25,525,305)
Disposals     (821,901)  
Transfers     (404,843)  
Translation adjustment (15,629,722)   (8,771,197) (3,728,284)
Balance at December 31 113,568,320 $ 6,723 121,874,096 90,372,393
As of January 1 134,148,811      
Interest expense 10,648,584   8,903,397 7,129,251
Payments (39,498,197) $ (2,338) (33,823,287) (30,544,750)
Balance at December 31 125,169,156   134,148,811  
Towers and sites [member]        
Disclosure Right of use Assets and Lease liabilities [Line Items]        
As of January 1 106,219,649   76,557,028 85,218,875
Additions and release 14,744,304   42,958,221 3,145,941
Business combinations     4,247,042  
Modifications 25,773,865   11,859,492 10,945,985
Depreciation (26,763,563)   (22,858,868) (19,849,598)
Disposals     (696,904)  
Transfers     (165,779)  
Translation adjustment (13,391,742)   (5,680,583) (2,904,175)
Balance at December 31 106,582,513   106,219,649 76,557,028
Property [member]        
Disclosure Right of use Assets and Lease liabilities [Line Items]        
As of January 1 9,222,438   9,936,705 12,205,435
Additions and release 464,791   574,801 482,456
Business combinations     318  
Modifications 1,430,795   3,584,607 1,024,573
Depreciation (3,122,468)   (3,369,095) (3,086,201)
Disposals     (88,303)  
Transfers     (126,763)  
Translation adjustment (1,358,124)   (1,289,832) (689,558)
Balance at December 31 6,637,432   9,222,438 9,936,705
Office equipment [member]        
Disclosure Right of use Assets and Lease liabilities [Line Items]        
As of January 1 6,432,009   3,878,660 4,552,534
Additions and release 146,515   5,463,706 1,052,022
Business combinations     5,413  
Modifications (3,397,274)   1,790,905 998,161
Depreciation (1,953,019)   (2,756,898) (2,589,506)
Disposals     (36,694)  
Transfers     (112,301)  
Translation adjustment (879,856)   (1,800,782) (134,551)
Balance at December 31 348,375   6,432,009 3,878,660
Liability related to right-of-use of assets [member]        
Disclosure Right of use Assets and Lease liabilities [Line Items]        
As of January 1 134,148,811   98,654,225 109,327,241
Additions and release 12,244,019   44,134,101 3,060,042
Business Combinations     9,129,255  
Modifications 39,109,007   19,038,741 12,535,394
Interest expense 10,648,584   8,903,397 7,129,251
Payments (39,498,197)   (33,823,287) (30,544,750)
Disposals     (1,044,480)  
Transfers     (438,571)  
Translation adjustment (31,483,068)   (10,404,570) (2,852,953)
Balance at December 31 $ 125,169,156   $ 134,148,811 $ 98,654,225