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Other Liabilities, Provisions and Commitments - Summary of Changes in Balance of Provisions Recorded (Detail) - MXN ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Disclosure of other provisions [line items] |  |  |
Balance at beginning of the period | $ 5,100 |  |
Balance at end of the period | 4,150 | $ 5,100 |
Taxes |  |  |
Disclosure of other provisions [line items] |  |  |
Balance at beginning of the period | 2,540 | 4,696 | $ 5,038
Penalties and other charges | 30 | 0 | 1
New contingencies | 148 | 186 | 368
Cancellation and adjustments | (59) | (152) | (247)
Payments | (236) | (187) | (68)
Reversal of indemnifiable items | 0 | (1,177) | 0
Other Effects | (263) | 0 | 0
Effect of foreign currency exchange rates | (94) | (826) | (396)
Balance at end of the period | 2,066 | 2,540 | 4,696
Labor |  |  |
Disclosure of other provisions [line items] |  |  |
Balance at beginning of the period | 1,681 | 2,222 | 2,340
Penalties and other charges | 303 | 228 | 249
New contingencies | 363 | 227 | 465
Cancellation and adjustments | (445) | (51) | (273)
Contingencies added in business combinations | 0 | 0 | 44
Payments | (358) | (561) | (401)
Effect of foreign currency exchange rates | (72) | (384) | (202)
Balance at end of the period | 1,472 | 1,681 | 2,222
Legal |  |  |
Disclosure of other provisions [line items] |  |  |
Balance at beginning of the period | 879 | 1,065 | 920
Penalties and other charges | 68 | 8 | 94
New contingencies | 26 | 193 | 128
Cancellation and adjustments | (241) | (141) | (45)
Contingencies added in business combinations | 0 | 0 | 77
Payments | (97) | (111) | (44)
Effect of foreign currency exchange rates | (23) | (135) | (65)
Balance at end of the period | $ 612 | $ 879 | $ 1,065

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