XML 61 R51.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Dividends - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions |  |  | 6 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Feb. 19, 2019 | Dec. 17, 2018 | Dec. 31, 2018 | Dec. 31, 2017 | Jun. 30, 2018
Disclosure of dividends [line items] |  |  |  |  |
Dividend per share, after period-end |  |  |  | $ 0.55 | $ 0.63
Dividend amount, after period-end |  |  |  | $ 2,928 | $ 3,354
Shares in BHP Group Limited that were held by BHP Group Plc |  |  | 0 |  |
Tax rate |  |  | 30.00% | 30.00% | 30.00%
Special dividend [member] |  |  |  |  |
Disclosure of dividends [line items] |  |  |  |  |
Dividend per share, after period-end |  | $ 1.02 |  |  |
Dividend amount, after period-end |  | $ 5,200 |  |  |
Major ordinary share transactions [member] |  |  |  |  |
Disclosure of dividends [line items] |  |  |  |  |
Dividend per share, after period-end | $ 0.55 |  |  |  |
Dividend amount, after period-end | $ 2,781 |  |  |  |
BHP Billiton Limited [member] |  |  |  |  |
Disclosure of dividends [line items] |  |  |  |  |
Ordinary shares on issue and held by the public |  |  | 2,945,000,000 |  |
Number of ordinary shares represented by each American Depositary Share |  |  | 2 |  |
Tax rate |  |  | 30.00% |  |
BHP Billiton Plc [member] |  |  |  |  |
Disclosure of dividends [line items] |  |  |  |  |
Ordinary shares on issue and held by the public |  |  | 2,112,000,000 |  |
Number of ordinary shares represented by each American Depositary Share |  |  | 2 |  |

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

X
- Definition Number of common shares represented by ADSs. + References No definition available. + Details
Name: | bhp_NumberOfCommonSharesRepresentedByADSs
Namespace Prefix: | bhp_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of own shares held. + References No definition available. + Details
Name: | bhp_NumberOfOwnSharesHeld
Namespace Prefix: | bhp_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition The applicable income tax rate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2018-01-01 -Paragraph 81 -Subparagraph c -Clause ii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2018-03-01&anchor=para_81_c_ii&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_ApplicableTaxRate
Namespace Prefix: | ifrs-full_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of dividends proposed or declared after the reporting period but before financial statements are authorised for issue. Such dividends are not recognised as a liability at the end of the reporting period because no obligation exists at that time. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 137 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_137_a&doctype=Standard -URIDate 2018-03-16 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 10 -IssueDate 2018-01-01 -Paragraph 13 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=10&date=2018-03-01&anchor=para_13&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_DividendsProposedOrDeclaredBeforeFinancialStatementsAuthorisedForIssueButNotRecognisedAsDistributionToOwners
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount, per share, of dividends proposed or declared before financial statements were authorised for issue but not recognised as distribution to owners. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 137 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_137_a&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_DividendsProposedOrDeclaredBeforeFinancialStatementsAuthorisedForIssueButNotRecognisedAsDistributionToOwnersPerShare
Namespace Prefix: | ifrs-full_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of shares issued by the entity, for which full payment has been received. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 79 -Subparagraph a -Clause ii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_79_a_ii&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_NumberOfSharesIssuedAndFullyPaid
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | bhp_DividendAxis=bhp_SpecialDividendMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_NonadjustingEventsAfterReportingPeriodAxis=ifrs-full_MajorOrdinaryShareTransactionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=bhp_BHPBillitonLimitedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=bhp_BHPBillitonPlcMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |