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v3.20.2

Risks Arising from Financial Instruments - Summary of Estimated Impact on Changes in the Price of Commodities (Detail) - Commodity price risk [member] - USD ($) $ in Millions | 6 Months Ended | 12 Months Ended
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Jun. 30, 2020 | Dec. 31, 2019
Aluminum swap [member] |  |
Disclosure of sensitivity analysis for each type of commodity price risk [line items] |  |
Volatility of prices | 13.45% | 21.78%
Pre-tax impact on equity Price Increases | $ 181 | $ 312
Prices decrease | $ (181) | $ (312)
Exchange traded sugar futures [member] |  |
Disclosure of sensitivity analysis for each type of commodity price risk [line items] |  |
Volatility of prices | 29.15% | 29.73%
Pre-tax impact on equity Price Increases | $ 17 | $ 16
Prices decrease | $ (17) | $ (16)
Exchange traded wheat futures [member] |  |
Disclosure of sensitivity analysis for each type of commodity price risk [line items] |  |
Volatility of prices | 24.27% | 30.30%
Pre-tax impact on equity Price Increases | $ 2 | $ 6
Prices decrease | $ (2) | $ (6)
Natural gas and energy derivatives [member] |  |
Disclosure of sensitivity analysis for each type of commodity price risk [line items] |  |
Volatility of prices | 46.26% | 25.86%
Pre-tax impact on equity Price Increases | $ 69 | $ 66
Prices decrease | $ (69) | $ (66)
Rice swaps [member] |  |
Disclosure of sensitivity analysis for each type of commodity price risk [line items] |  |
Volatility of prices | 35.60% | 22.64%
Pre-tax impact on equity Price Increases | $ 60 | $ 47
Prices decrease | $ (60) | $ (47)
Corn swaps [member] |  |
Disclosure of sensitivity analysis for each type of commodity price risk [line items] |  |
Volatility of prices | 28.23% | 21.74%
Pre-tax impact on equity Price Increases | $ 57 | $ 42
Prices decrease | $ (57) | $ (42)
Plastic derivatives [member] |  |
Disclosure of sensitivity analysis for each type of commodity price risk [line items] |  |
Volatility of prices | 28.63% | 24.03%
Pre-tax impact on equity Price Increases | $ 11 | $ 14
Prices decrease | $ (11) | $ (14)

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