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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, 2022
MXN ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
MXN ($)
Dec. 31, 2020
MXN ($)
Disclosure Right of use Assets and Lease liabilities [Line Items]        
As of January 1 $ 90,372,393   $ 101,976,844  
As of January 1 90,372,393   101,976,844 $ 118,003,223
Additions and release 48,996,728   4,680,419 7,569,964
Business combinations 4,252,773      
Modifications 17,235,004   12,968,719 6,572,362
Depreciation (28,984,861)   (25,525,305) (26,759,221)
Disposals (821,901)      
Transfers (404,843)      
Translation adjustment (8,771,197)   (3,728,284) (3,409,484)
Balance at December 31 121,874,096 $ 6,278 90,372,393 101,976,844
As of January 1 98,654,225      
Interest expense 8,903,397   7,129,251 8,800,153
Payments (33,823,287) $ (1,742) (30,544,750) (29,623,565)
Balance at December 31 134,148,811   98,654,225  
Towers and sites [member]        
Disclosure Right of use Assets and Lease liabilities [Line Items]        
As of January 1 76,557,028   85,218,875 96,102,449
Additions and release 42,958,221   3,145,941 5,745,869
Business combinations 4,247,042      
Modifications 11,859,492   10,945,985 8,559,335
Depreciation (22,858,868)   (19,849,598) (20,672,460)
Disposals (696,904)      
Transfers (165,779)      
Translation adjustment (5,680,583)   (2,904,175) (4,516,318)
Balance at December 31 106,219,649   76,557,028 85,218,875
Property [member]        
Disclosure Right of use Assets and Lease liabilities [Line Items]        
As of January 1 9,936,705   12,205,435 17,439,370
Additions and release 574,801   482,456 309,576
Business combinations 318      
Modifications 3,584,607   1,024,573 (3,035,831)
Depreciation (3,369,095)   (3,086,201) (3,235,914)
Disposals (88,303)      
Transfers (126,763)      
Translation adjustment (1,289,832)   (689,558) 728,234
Balance at December 31 9,222,438   9,936,705 12,205,435
Office equipment [member]        
Disclosure Right of use Assets and Lease liabilities [Line Items]        
As of January 1 3,878,660   4,552,534 4,461,404
Additions and release 5,463,706   1,052,022 1,514,519
Business combinations 5,413      
Modifications 1,790,905   998,161 1,048,858
Depreciation (2,756,898)   (2,589,506) (2,850,847)
Disposals (36,694)      
Transfers (112,301)      
Translation adjustment (1,800,782)   (134,551) 378,600
Balance at December 31 6,432,009   3,878,660 4,552,534
Liability related to right-of-use of assets [member]        
Disclosure Right of use Assets and Lease liabilities [Line Items]        
As of January 1 98,654,225   109,327,241 120,596,733
Additions and release 44,134,101   3,060,042 4,833,959
Business Combinations 9,129,255      
Modifications 19,038,741   12,535,394 7,769,326
Interest expense 8,903,397   7,129,251 8,800,153
Payments (33,823,287)   (30,544,750) (29,623,565)
Disposals (1,044,480)      
Transfers (438,571)      
Translation adjustment (10,404,570)   (2,852,953) (3,049,365)
Balance at December 31 $ 134,148,811   $ 98,654,225 $ 109,327,241