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Financial Instruments - Additional Information - Short-Term and Long-Term Debt (Detail) $ in Millions, $ in Millions | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2018 MXN ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 MXN ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 MXN ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Jul. 19, 2017 USD ($) | Dec. 31, 2015 MXN ($)
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |
Issuance of outstanding notes payables |  |  |  |  |  |  | $ 65 | $ 84 |  |
Total debt | $ 182,957 |  | $ 193,995 |  | $ 236,238 |  |  |  |  | $ 229,343
Share in borrowings, percentage | 79.00% | 79.00% | 80.00% | 80.00% |  |  |  |  |  |
Percentage of bank loans on total indebtedness | 38.00% |  | 29.00% |  |  |  | 38.00% | 29.00% |  |
Long term borrowings | $ 182,074 |  | $ 177,022 |  |  |  | $ 9,339 |  |  |
Premiums, fees and issuance costs paid | 1,006 | $ 51 | 4,930 | $ 251 | 4,061 | $ 196 |  |  |  |
Issuance costs recognized | 1,006 | 51 | 4,160 | 212 | 3,129 | 151 |  |  |  |
Issuance costs of new debt |  |  | 770 | 39 | 932 | 45 |  |  |  |
Proportional fees and issuance costs related to the extinguished debt instruments | $ 87 | $ 4 | $ 310 | $ 16 | $ 767 | $ 37 |  |  |  |
Other countries [member] |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |
Share in borrowings, percentage | 6.00% | 6.00% | 5.00% | 5.00% |  |  |  |  |  |
Finance subsidiaries [member] |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |
Share in borrowings, percentage | 15.00% | 15.00% | 15.00% | 15.00% |  |  |  |  |  |
2017 Credit Agreement [member] |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |
Bank indebtedness |  |  |  |  |  |  |  | $ 4,050 | $ 4,050 |
Notes payable [member] |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |
Long term borrowings | $ 113,307 |  | $ 137,136 |  |  |  |  |  |  |

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- Definition Fees and issuance costs related to extinguished debt instruments. + References No definition available. + Details
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