XML 221 R160.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Discontinued Operations - Summary of Exceptional Items - Discontinued Operations (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2016
Disclosure of discontinued operations [line items] |  |  |
Exceptional items gross | $ (650) | $ (763) | $ (2,520)
Exceptional items tax | (2,320) | (243) | (247)
Exceptional items net | (2,970) | (1,006) | (2,767)
US tax reform [Member] |  |  |
Disclosure of discontinued operations [line items] |  |  |
Exceptional items gross | (2,320) |  |
Exceptional items tax | (2,320) |  |
Exceptional items net | (2,320) |  |
Impairment of Onshore US assets [member] |  |  |
Disclosure of discontinued operations [line items] |  |  |
Exceptional items net |  |  | (4,884)
Non-controlling interests [Member] |  |  |
Disclosure of discontinued operations [line items] |  |  |
Exceptional items gross |  | (232) |
Exceptional items tax |  | 68 |
Exceptional items net |  | (164) |
Attributable to BHP shareholders [member] |  |  |
Disclosure of discontinued operations [line items] |  |  |
Exceptional items gross | (650) | (531) | (2,520)
Exceptional items tax | (2,320) | (311) | (247)
Exceptional items net | (2,970) | $ (842) | (2,767)
Discontinued operations [member] |  |  |
Disclosure of discontinued operations [line items] |  |  |
Exceptional items gross | (2,859) |  | (7,184)
Exceptional items tax | 601 |  | 2,300
Exceptional items net | (2,258) |  | (4,884)
Discontinued operations [member] | US tax reform [Member] |  |  |
Disclosure of discontinued operations [line items] |  |  |
Exceptional items tax | 492 |  |
Exceptional items net | 492 |  |
Discontinued operations [member] | Impairment of Onshore US assets [member] |  |  |
Disclosure of discontinued operations [line items] |  |  |
Exceptional items gross | (2,859) |  | (7,184)
Exceptional items tax | 109 |  | 2,300
Exceptional items net | (2,750) |  | (4,884)
Discontinued operations [member] | Non-controlling interests [Member] |  |  |
Disclosure of discontinued operations [line items] |  |  |
Exceptional items gross |  |  | (80)
Exceptional items tax |  |  | 29
Exceptional items net |  |  | (51)
Discontinued operations [member] | Attributable to BHP shareholders [member] |  |  |
Disclosure of discontinued operations [line items] |  |  |
Exceptional items gross | (2,859) |  | (7,104)
Exceptional items tax | 601 |  | 2,271
Exceptional items net | $ (2,258) |  | $ (4,833)

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

X
- Definition Exceptional items, gross. + References No definition available. + Details
Name: | bhp_ExceptionalItemsGross
Namespace Prefix: | bhp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Exceptional items, net + References No definition available. + Details
Name: | bhp_ExceptionalItemsNet
Namespace Prefix: | bhp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Income tax expense benefit relating to exceptional Items. + References No definition available. + Details
Name: | bhp_ExceptionalItemsTax
Namespace Prefix: | bhp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | bhp_ExceptionalItemsAxis=bhp_USTaxReformMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | bhp_ExceptionalItemsAxis=bhp_ImpairmentOfOnshoreUSAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | bhp_ExceptionalItemsAxis=ifrs-full_NoncontrollingInterestsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | bhp_ExceptionalItemsAxis=ifrs-full_EquityAttributableToOwnersOfParentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ContinuingAndDiscontinuedOperationsAxis=ifrs-full_DiscontinuedOperationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |