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Derivative Financial Instruments - Summary of Maturities of Notional Amount of Derivatives (Detail) € in Millions, ¥ in Millions, ¥ in Millions, £ in Millions, R$ in Millions, $ in Millions, $ in Millions | Dec. 31, 2019 USD ($) | Dec. 31, 2019 EUR (€) | Dec. 31, 2019 BRL (R$) | Dec. 31, 2019 GBP (£) | Dec. 31, 2019 CNY (¥) | Dec. 31, 2019 ARS ($) | Dec. 31, 2019 JPY (¥) | Dec. 31, 2018 USD ($) | Dec. 31, 2018 EUR (€) | Dec. 31, 2018 BRL (R$) | Dec. 31, 2018 GBP (£) | Dec. 31, 2018 JPY (¥)
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Swaps US Dollar-Mexican peso [member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Asset | $ 3,290 |  |  |  |  |  |  | $ 3,490 |  |  |  |
Swaps Yen-US Dollar [member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Asset | ¥ |  |  |  |  |  |  | ¥ 6,500 |  |  |  |  | ¥ 13,000
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 |  |
Forwards Euro- Brazilian real [member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Asset | € |  | € 50 |  |  |  |  |  |  | € 150 |  |  |
Notional amount, Liabilities | € |  | 140 |  |  |  |  |  |  |  |  |  |
Forwards US Dollar - Brazilian real [member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Asset | 83 |  |  |  |  |  |  | 150 |  |  |  |
Forwards Euro-US Dollar [member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Asset | € |  | 1,506 |  |  |  |  |  |  | 710 |  |  |
Notional amount, Liabilities | € |  | 1,094 |  |  |  |  |  |  | 950 |  |  |
Swaps Dollar- Euro [member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Liabilities | 800 |  |  |  |  |  |  | 2,025 |  |  |  |
Swaps Pound sterling-Euro [member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Liabilities | £ |  |  |  | £ 640 |  |  |  |  |  |  | £ 740 |
Forwards US Dollar-Mexican peso [member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Asset | 100 |  |  |  |  |  |  | 0 |  |  |  |
Notional amount, Liabilities | 2,343 |  |  |  |  |  |  | $ 977 |  |  |  |
Put option [member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Liabilities | € |  | 374 |  |  |  |  |  |  | 374 |  |  |
Call spread option [member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Liabilities | € |  | 3,000 |  |  |  |  |  |  | € 3,000 |  |  |
Swaps US Dollar- Euro [member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Asset | 150 |  |  |  |  |  |  |  |  |  |  |
Swaps Pound sterling – US Dollar [member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Asset | £ |  |  |  | 100 |  |  |  |  |  |  |  |
Forwards Argentinean Peso US Dollar [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Asset |  |  |  |  |  | $ 1,388 |  |  |  |  |  |
Forwards US Dollar Euro [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Liabilities | 20 |  |  |  |  |  |  |  |  |  |  |
Forwards Yen US Dollar [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Liabilities | ¥ |  |  |  |  |  |  | 6,500 |  |  |  |  |
2020 [member] | Forwards Brazilian Real - US Dollar [member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Asset | R$ |  |  | 4,660 |  |  |  |  |  |  |  |  |
2020 [member] | Forwards Euro- Brazilian real [member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Asset | € |  | 50 |  |  |  |  |  |  |  |  |  |
Notional amount, Liabilities | £ |  |  |  | 140 |  |  |  |  |  |  |  |
2020 [member] | Forwards US Dollar - Brazilian real [member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Asset | 83 |  |  |  |  |  |  |  |  |  |  |
2020 [member] | Forwards Euro-US Dollar [member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Asset | € |  | 1,506 |  |  |  |  |  |  |  |  |  |
Notional amount, Liabilities | € |  | 1,094 |  |  |  |  |  |  |  |  |  |
2020 [member] | Swaps Dollar- Euro [member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Liabilities | 0 |  |  |  |  |  |  |  |  |  |  |
2020 [member] | Forwards US Dollar-Mexican peso [member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Asset | 100 |  |  |  |  |  |  |  |  |  |  |
Notional amount, Liabilities | 2,343 |  |  |  |  |  |  |  |  |  |  |
2020 [member] | Call spread option [member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Liabilities | € |  | 3,000 |  |  |  |  |  |  |  |  |  |
2020 [member] | Swaps Pound sterling – US Dollar [member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Liabilities | £ |  |  |  | 550 |  |  |  |  |  |  |  |
2020 [member] | Forwards Argentinean Peso US Dollar [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Asset |  |  |  |  |  | $ 1,388 |  |  |  |  |  |
2020 [member] | Forwards US Dollar Euro [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Liabilities | 20 |  |  |  |  |  |  |  |  |  |  |
2020 [member] | Forwards Yen US Dollar [Member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Liabilities | ¥ |  |  |  |  |  |  | ¥ 6,500 |  |  |  |  |
2021 [member] | Swaps US Dollar-Mexican peso [member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Liabilities | 0 |  |  |  |  |  |  |  |  |  |  |
2021 [member] | Forwards Brazilian Real - US Dollar [member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Asset | R$ |  |  | 1,143 |  |  |  |  |  |  |  |  |
2021 [member] | Call spread option [member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Liabilities | € |  | 0 |  |  |  |  |  |  |  |  |  |
2021 [member] | Swaps Pound sterling – US Dollar [member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Liabilities | £ |  |  |  | 0 |  |  |  |  |  |  |  |
2022 [member] | Swaps US Dollar-Mexican peso [member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Asset | 1,400 |  |  |  |  |  |  |  |  |  |  |
Notional amount, Liabilities | 200 |  |  |  |  |  |  |  |  |  |  |
2022 [member] | Forwards Brazilian Real - US Dollar [member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Asset | R$ |  |  | R$ 0 |  |  |  |  |  |  |  |  |
2023 [member] | Swaps US Dollar-Mexican peso [member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Asset | 0 |  |  |  |  |  |  |  |  |  |  |
2024 and Thereafter [member] | Swaps US Dollar-Mexican peso [member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Asset | 1,890 |  |  |  |  |  |  |  |  |  |  |
2024 and Thereafter [member] | Swaps Yen-US Dollar [member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Asset | ¥ |  |  |  |  | ¥ 6,500 |  |  |  |  |  |  |
2024 and Thereafter [member] | Swaps Dollar- Euro [member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Liabilities | 800 |  |  |  |  |  |  |  |  |  |  |
2024 and Thereafter [member] | Swaps Pound sterling-Euro [member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Liabilities | £ |  |  |  | 640 |  |  |  |  |  |  |  |
2024 and Thereafter [member] | Put option [member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Liabilities | € |  | € 374 |  |  |  |  |  |  |  |  |  |
2024 and Thereafter [member] | Swaps US Dollar- Euro [member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Asset | $ 150 |  |  |  |  |  |  |  |  |  |  |
2024 and Thereafter [member] | Swaps Pound sterling – US Dollar [member] |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount, Asset | £ |  |  |  | 100 |  |  |  |  |  |  |  |
Notional amount, Liabilities | £ |  |  |  | £ 1,460 |  |  |  |  |  |  |  |

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