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Trade Receivable, Net - Aging Analysis of Accounts Receivable (Detail) - MXN ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018
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Disclosure of Aging Analysis of Accounts Receivable [Line Items] |  |
Trade receivables past due but not impaired | $ 15,476 | $ 14,847
Not later than one month [member] |  |
Disclosure of Aging Analysis of Accounts Receivable [Line Items] |  |
Trade receivables past due but not impaired | 12,630 | 12,578
1-30 days [member] |  |
Disclosure of Aging Analysis of Accounts Receivable [Line Items] |  |
Trade receivables past due but not impaired | 1,448 | 1,045
31-60 days [Member] |  |
Disclosure of Aging Analysis of Accounts Receivable [Line Items] |  |
Trade receivables past due but not impaired | 672 | 193
61-90 days [Member] |  |
Disclosure of Aging Analysis of Accounts Receivable [Line Items] |  |
Trade receivables past due but not impaired | 153 | 310
91-120 days [Member] |  |
Disclosure of Aging Analysis of Accounts Receivable [Line Items] |  |
Trade receivables past due but not impaired | 90 | 17
121 + days [Member] |  |
Disclosure of Aging Analysis of Accounts Receivable [Line Items] |  |
Trade receivables past due but not impaired | $ 483 | $ 704

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