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Other Current Assets and Other Current Financial Assets - Other Current Financial Assets (Details) $ in Millions, $ in Millions | Dec. 31, 2020 USD ($) | Dec. 31, 2020 MXN ($) | Dec. 31, 2019 MXN ($)
--- | --- | --- | ---
Disclosure of Restricted Cash and Cash Equivalents [line items] |  |  |
Current restricted cash |  | $ 77 | $ 92
Derivative financial instruments (see Note 21) |  | 573 | 1,008
Note receivables |  | 31 | 46
Other current financial assets | $ 34 | 681 | 1,146
Brazilian reais [member] |  |  |
Disclosure of Restricted Cash and Cash Equivalents [line items] |  |  |
Current restricted cash |  | 74 | 89
Chilean peso [member] |  |  |
Disclosure of Restricted Cash and Cash Equivalents [line items] |  |  |
Current restricted cash |  | $ 3 | $ 3

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