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Derivative Financial Instruments - Schedule of Derivative Financial Instruments Contracted (Detail) € in Thousands, $ in Thousands, ¥ in Millions, £ in Millions, R$ in Millions, $ in Millions, $ in Millions | Dec. 31, 2019 MXN ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2019 EUR (€) | Dec. 31, 2019 BRL (R$) | Dec. 31, 2019 GBP (£) | Dec. 31, 2019 ARS ($) | Dec. 31, 2019 JPY (¥) | Dec. 31, 2018 MXN ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2018 EUR (€) | Dec. 31, 2018 BRL (R$) | Dec. 31, 2018 GBP (£) | Dec. 31, 2018 JPY (¥)
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Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value, Asset | $ 6,825,760 | $ 362 |  |  |  |  |  | $ 5,287,548 |  |  |  |  |
Fair value, Liabilities | (9,596,751) |  |  |  |  |  |  | (17,107,579) |  |  |  |  |
Non-current liability | 0 |  |  |  |  |  |  | (3,567,863) |  |  |  |  |
Total current liability | (9,596,751) | (509) |  |  |  |  |  | (13,539,716) |  |  |  |  |
Swaps US Dollar-Mexican Peso [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Asset |  | 3,290 |  |  |  |  |  |  | $ 3,490 |  |  |  |
Fair value, Asset | 4,420,433 |  |  |  |  |  |  | 2,058,831 |  |  |  |  |
Swaps Yen-US Dollar [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Asset | ¥ |  |  |  |  |  |  | ¥ 6,500 |  |  |  |  |  | ¥ 13,000
Fair value, Asset | 262,993 |  |  |  |  |  |  | 581,948 |  |  |  |  |
Forwards US Dollar-Mexican peso [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Asset |  | 100 |  |  |  |  |  |  | 0 |  |  |  |
Fair value, Asset | 18 |  |  |  |  |  |  | 0 |  |  |  |  |
Notional amount, Liabilities |  | 2,343 |  |  |  |  |  |  | 977 |  |  |  |
Fair value, Liabilities | (1,398,247) |  |  |  |  |  |  | (772,704) |  |  |  |  |
Forwards US Dollar - Brazilian Real [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Asset |  | 83 |  |  |  |  |  |  | 150 |  |  |  |
Fair value, Asset | 90,429 |  |  |  |  |  |  | 126,287 |  |  |  |  |
Swaps Euro-Brazilianreal [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Asset | € |  |  | € 0 |  |  |  |  |  |  | € 300,000 |  |  |
Fair value, Asset | 0 |  |  |  |  |  |  | 1,080,552 |  |  |  |  |
Forwards Brazilian Real - US Dollar [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Asset | R$ |  |  |  | R$ 5,803 |  |  |  |  |  |  | R$ 2,823 |  |
Fair value, Asset | 1,620,605 |  |  |  |  |  |  | 1,107,630 |  |  |  |  |
Forwards Euro- Brazilian Real [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Asset | € |  |  | 50,000 |  |  |  |  |  |  | 150,000 |  |  |
Fair value, Asset | 4,255 |  |  |  |  |  |  |  |  | 123,005 |  |  |
Notional amount, Liabilities | € |  |  | 140,000 |  |  |  |  |  |  |  |  |  |
Fair value, Liabilities | (10,196) |  |  |  |  |  |  |  |  |  |  |  |
Forwards Euro-US Dollar [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Asset | € |  |  | 1,506,000 |  |  |  |  |  |  | 710,000 |  |  |
Fair value, Asset | 204,241 |  |  |  |  |  |  |  |  | 209,295 |  |  |
Notional amount, Liabilities | € |  |  | 1,094,000 |  |  |  |  |  |  | 950,000 |  |  |
Fair value, Liabilities | (554,278) |  |  |  |  |  |  | (333,586) |  |  |  |  |
Swaps Dollar- Euro [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Liabilities |  | 800 |  |  |  |  |  |  | $ 2,025 |  |  |  |
Fair value, Liabilities | (2,228,287) |  |  |  |  |  |  | (5,114,863) |  |  |  |  |
Swaps Pound sterling-Euro [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Liabilities | £ |  |  |  |  | £ 640 |  |  |  |  |  |  | £ 740 |
Fair value, Liabilities | (2,201,997) |  |  |  |  |  |  | (4,027,312) |  |  |  |  |
Swap Pound sterling-USDollar [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Liabilities | £ |  |  |  |  | 2,010 |  |  |  |  |  |  | £ 2,010 |
Fair value, Liabilities | (3,019,255) |  |  |  |  |  |  | (5,836,607) |  |  |  |  |
Put option [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Liabilities | € |  |  | 374,000 |  |  |  |  |  |  | 374,000 |  |  |
Fair value, Liabilities | (126,569) |  |  |  |  |  |  | (988,669) |  |  |  |  |
Call option [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Liabilities | € |  |  | € 3,000,000 |  |  |  |  |  |  | € 3,000,000 |  |  |
Fair value, Liabilities | (2,113) |  |  |  |  |  |  | $ (33,838) |  |  |  |  |
Swaps US Dollar- Euro [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Asset |  | 150 |  |  |  |  |  |  |  |  |  |  |
Fair value, Asset | 96,967 |  |  |  |  |  |  |  |  |  |  |  |
Swaps Pound sterling – US Dollar [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Asset | £ |  |  |  |  | £ 100 |  |  |  |  |  |  |  |
Fair value, Asset | 2,988 |  |  |  |  |  |  |  |  |  |  |  |
Forwards Argentinean Peso – US Dollar [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Asset |  |  |  |  |  | $ 1,388 |  |  |  |  |  |  |
Fair value, Asset | 122,831 |  |  |  |  |  |  |  |  |  |  |  |
Swaps US Dollar Mexican peso [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Liabilities |  | 200 |  |  |  |  |  |  |  |  |  |  |
Fair value, Liabilities | (33,253) |  |  |  |  |  |  |  |  |  |  |  |
Forwards US Dollar Euro [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Liabilities |  | $ 20 |  |  |  |  |  |  |  |  |  |  |
Fair value, Liabilities | (3,787) |  |  |  |  |  |  |  |  |  |  |  |
Forwards Yen US Dollar [member] |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Liabilities | ¥ |  |  |  |  |  |  | ¥ 6,500 |  |  |  |  |  |
Fair value, Liabilities | $ (18,769) |  |  |  |  |  |  |  |  |  |  |  |

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