XML 197 R136.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Net Finance Costs - Summary of Net Finance Costs (Parenthetical) (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2016
Disclosure of finance income costs [abstract] |  |  |
Interest capitalised | 4.24% | 3.25% | 2.61%
Tax relief for capitalised interest | $ 42 | $ 34 | $ 37

X
- Definition Disclosure of finance income costs. + References No definition available. + Details
Name: | bhp_DisclosureOfFinanceIncomeCostsAbstract
Namespace Prefix: | bhp_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Approximate tax relief related to capitalised interest. + References No definition available. + Details
Name: | bhp_TaxReliefOnCapitalisedInterest
Namespace Prefix: | bhp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The weighted average of interest and other costs that an entity incurs in connection with the borrowing of funds applicable to the borrowings of the entity that are outstanding during the period, other than borrowings made specifically for the purpose of obtaining a qualifying asset. [Refer: Weighted average [member]; Borrowings] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 23 -IssueDate 2017-01-01 -Paragraph 26 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=23&date=2017-03-01&anchor=para_26_b&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_CapitalisationRateOfBorrowingCostsEligibleForCapitalisation
Namespace Prefix: | ifrs-full_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration