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Provisions, including post-retirement benefits - Summary of Provisions, including post-retirement benefits (Parenthetical) (Detail) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Disclosure of other provisions [Line Items] |  |  |
Remaining lives of operations and infrastructure present closure obligation | 17 years | 20 years |
Remaining lives of operations and infrastructure | one to over 60 years |  |
Close-down and restoration costs and environmental clean-up obligations | $ 9,975 | $ 9,983 |
Risk free interest rate on provisions | 2.00% |  |
Provision | $ 13,608 | 14,642 | $ 13,794
Non-current provisions | $ 12,552 | $ 13,367 |
Diavik Diamond Mines (2012) Inc. [Member] |  |  |
Disclosure of other provisions [Line Items] |  |  |
Adjustment to record obligations for close-down and restoration | 100.00% | 60.00% |
Bottom of range [Member] |  |  |
Disclosure of other provisions [Line Items] |  |  |
Risk free interest rate on provisions | 0.50% |  |
Top of range [Member] |  |  |
Disclosure of other provisions [Line Items] |  |  |
Provision | $ 1,139 |  |
Other employee entitlements [member] |  |  |
Disclosure of other provisions [Line Items] |  |  |
Provision for long service leave | 242 | $ 292 |
Provision for redundancy and severance payments | 46 | 24 |
Provision | 360 | 389 |
Non-current provisions | 86 |  |
Close down and restoration/ environmental [member] |  |  |
Disclosure of other provisions [Line Items] |  |  |
Provision | 9,975 | 9,983 |
Non-current provisions | 9,499 |  |
Provisions relating to insurance recoveries and other financial assets held | 110 | 75 |
Close down and restoration/ environmental [member] | Between 1 and 5 years [Member] |  |  |
Disclosure of other provisions [Line Items] |  |  |
Non-current provisions | 535 | 336 |
Close down and restoration/ environmental [member] | After 5 years [Member] |  |  |
Disclosure of other provisions [Line Items] |  |  |
Non-current provisions | $ 683 | $ 839 |

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- Definition The amount of provision for costs related to decommissioning, restoration and rehabilitation. [Refer: Other provisions] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 37 -IssueDate 2017-01-01 -Section D Examples: disclosures -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=37&date=2017-03-01&anchor=sect_DExamples:disclosures&doctype=Illustrative%20Examples -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 37 -IssueDate 2017-01-01 -Paragraph 87 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=37&date=2017-03-01&anchor=para_87&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The amount of liabilities of uncertain timing or the amount recognised when: (a) the entity has a present obligation (legal or constructive) as a result of a past event; (b) it is probable (ie more likely than not) that an outflow of resources embodying economic benefits will be required to settle the obligation; and (c) a reliable estimate can be made of the amount of the obligation. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 54 -Subparagraph l -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_54_l&doctype=Standard -URIDate 2017-03-09 + Details
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