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Basis of Preparation - Additional information (Detail) - USD ($) $ in Millions | 6 Months Ended |
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jan. 01, 2018
Basis Of Presentation [Line Items] |  |  |
Non-cancellable operating lease commitments | $ 1,800 |  |
Money market funds |  |  | $ 7,800
Reclassification of trade and other receivables from amortised cost to FVPL |  |  | 1,316
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 | 19,914 | $ 19,319 |
Increase (decrease) due to changes in accounting policy required by IFRSs [Member] |  |  |
Basis Of Presentation [Line Items] |  |  |
Consolidated sales revenue | $ (10) |  |
Retained earnings [Member] |  |  |
Basis Of Presentation [Line Items] |  |  |
De-recognition of receivable arising from uplift transaction |  |  | 164
Transition adjustment reduction in trade and other receivables |  |  | 235
Bottom of range [Member] |  |  |
Basis Of Presentation [Line Items] |  |  |
Period to determine final prices for copper concentrate | 30 days |  |
Top Of Range [Member] |  |  |
Basis Of Presentation [Line Items] |  |  |
Period to determine final prices for copper concentrate | 180 days |  |
IFRS 9 [Member] |  |  |
Basis Of Presentation [Line Items] |  |  |
Impairment provision resulting from the application of the ECL model |  |  | $ 7

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- Definition The amount of future minimum lease payments payable under non-cancellable operating leases. Minimum lease payments are payments over the lease term that the lessee is or can be required to make, excluding contingent rent, costs for services and taxes to be paid by, and reimbursed to, the lessor, together with: (a) for a lessee, any amounts guaranteed by the lessee or by a party related to the lessee; or (b) for a lessor, any residual value guaranteed to the lessor by: (i) the lessee; (ii) a party related to the lessee; or (iii) a third party unrelated to the lessor that is financially capable of discharging the obligations under the guarantee. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2019-01-01 -Name IAS -Number 17 -IssueDate 2017-01-01 -Paragraph 35 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=17&date=2017-03-02&anchor=para_35_a&doctype=Standard&book=B -URIDate 2017-03-09 + Details
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