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New Standards and Interpretations Adopted in the Current Year - Additional information (Detail) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Jan. 01, 2018
Disclosure of initial application of standards or interpretations [Line Items] |  |  |  |
Reclassification of retained earnings to cost of hedging reserve | $ 22 |  |  |
Reclassification of cash flow hedge reserve to cost of hedging reserve | 4 |  |  |
Transition adjustment reduction in trade and other receivables |  |  |  | $ 235
Transition adjustment reduction in deferred tax liabilities |  |  |  | 71
Consolidated sales revenue | 40,522 | $ 40,030 | $ 33,781 |
Increase (decrease) due to changes in accounting policy required by IFRSs [Member] |  |  |  |
Disclosure of initial application of standards or interpretations [Line Items] |  |  |  |
Consolidated sales revenue | $ (19) |  |  |
Retained earnings [Member] |  |  |  |
Disclosure of initial application of standards or interpretations [Line Items] |  |  |  |
De-recognition of receivable arising from uplift transaction |  |  |  | 164
Transition adjustment reduction in trade and other receivables |  |  |  | 235
Bottom of range [Member] |  |  |  |
Disclosure of initial application of standards or interpretations [Line Items] |  |  |  |
Period to determine final prices for copper concentrate | 30 days |  |  |
Top of range [Member] |  |  |  |
Disclosure of initial application of standards or interpretations [Line Items] |  |  |  |
Period to determine final prices for copper concentrate | 180 days |  |  |
IFRS 9 [member] |  |  |  |
Disclosure of initial application of standards or interpretations [Line Items] |  |  |  |
Impairment provision resulting from the application of the ECL model |  |  |  | $ 7

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