XML 53 R43.htm IDEA: XBRL DOCUMENT v3.10.0.1

Net Finance Costs - Summary of Net Finance Costs (Parenthetical) (Detail)	6 Months Ended		12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Jun. 30, 2018
Disclosure of finance income costs [abstract]
Interest capitalised	4.94%	3.86%	4.24%

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

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 2018-01-01
-Paragraph 26
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=23&date=2018-03-01&anchor=para_26_b&doctype=Standard
-URIDate 2018-03-16

+ Details

Name:	ifrs-full_CapitalisationRateOfBorrowingCostsEligibleForCapitalisation
Namespace Prefix:	ifrs-full_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration