XML 129 R154.htm IDEA: XBRL DOCUMENT
v3.20.2

Financial Risk Management - Summary of Reconciliation of Components of Equity and Analysis of Movements in Reserves for all Hedges (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Jun. 30, 2020 | Jun. 30, 2019
Disclosure of information about amounts that affected statement of comprehensive income as result of hedge accounting [line items] |  |
At the beginning of the financial year | $ 40 | $ 58
Add: Change in fair value of hedging instrument recognised in OCI | (221) | (229)
Less: Reclassified from reserves to interest expense - recognised through OCI | 208 | 211
At the end of the financial year | 27 | 40
Cash flow hedging reserve, gross [member] |  |
Disclosure of information about amounts that affected statement of comprehensive income as result of hedge accounting [line items] |  |
At the beginning of the financial year | 163 | 85
Add: Change in fair value of hedging instrument recognised in OCI | (315) | (327)
Less: Reclassified from reserves to interest expense - recognised through OCI | 223 | 229
At the end of the financial year | 71 | 163
Cash flow hedging reserve, gross [member] | Impact of adopting IFRS 9 [member] |  |
Disclosure of information about amounts that affected statement of comprehensive income as result of hedge accounting [line items] |  |
At the beginning of the financial year |  | 176
Cash flow hedging reserve, tax [member] |  |
Disclosure of information about amounts that affected statement of comprehensive income as result of hedge accounting [line items] |  |
At the beginning of the financial year | (49) | (27)
Add: Change in fair value of hedging instrument recognised in OCI | 94 | 98
Less: Reclassified from reserves to interest expense - recognised through OCI | (66) | (68)
At the end of the financial year | (21) | (49)
Cash flow hedging reserve, tax [member] | Impact of adopting IFRS 9 [member] |  |
Disclosure of information about amounts that affected statement of comprehensive income as result of hedge accounting [line items] |  |
At the beginning of the financial year |  | (52)
Cash flow hedging reserve, net [member] |  |
Disclosure of information about amounts that affected statement of comprehensive income as result of hedge accounting [line items] |  |
At the beginning of the financial year | 114 | 58
Add: Change in fair value of hedging instrument recognised in OCI | (221) | (229)
Less: Reclassified from reserves to interest expense - recognised through OCI | 157 | 161
At the end of the financial year | 50 | 114
Cash flow hedging reserve, net [member] | Impact of adopting IFRS 9 [member] |  |
Disclosure of information about amounts that affected statement of comprehensive income as result of hedge accounting [line items] |  |
At the beginning of the financial year |  | 124
Cost of hedging reserve, gross [member] |  |
Disclosure of information about amounts that affected statement of comprehensive income as result of hedge accounting [line items] |  |
At the beginning of the financial year | (106) |
Less: Reclassified from reserves to interest expense - recognised through OCI | 74 | 70
At the end of the financial year | (32) | (106)
Cost of hedging reserve, gross [member] | Impact of adopting IFRS 9 [member] |  |
Disclosure of information about amounts that affected statement of comprehensive income as result of hedge accounting [line items] |  |
At the beginning of the financial year |  | (176)
Cost of hedging reserve, tax [member] |  |
Disclosure of information about amounts that affected statement of comprehensive income as result of hedge accounting [line items] |  |
At the beginning of the financial year | 32 |
Less: Reclassified from reserves to interest expense - recognised through OCI | (23) | (20)
At the end of the financial year | 9 | 32
Cost of hedging reserve, tax [member] | Impact of adopting IFRS 9 [member] |  |
Disclosure of information about amounts that affected statement of comprehensive income as result of hedge accounting [line items] |  |
At the beginning of the financial year |  | 52
Cost of hedging reserve, net [member] |  |
Disclosure of information about amounts that affected statement of comprehensive income as result of hedge accounting [line items] |  |
At the beginning of the financial year | (74) |
Less: Reclassified from reserves to interest expense - recognised through OCI | 51 | 50
At the end of the financial year | $ (23) | (74)
Cost of hedging reserve, net [member] | Impact of adopting IFRS 9 [member] |  |
Disclosure of information about amounts that affected statement of comprehensive income as result of hedge accounting [line items] |  |
At the beginning of the financial year |  | $ (124)

X
- Definition Hedge reserve. + References No definition available. + Details
Name: | bhp_HedgeReserve
Namespace Prefix: | bhp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
Name: | ifrs-full_DisclosureOfInformationAboutAmountsThatAffectedStatementOfComprehensiveIncomeAsResultOfHedgeAccountingLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The gains (losses) recognised in other comprehensive income on cash flow hedges, net of tax. [Refer: Cash flow hedges [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2019-01-01 -Paragraph 24C -Subparagraph b -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_24C_b_i&doctype=Standard -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2019-01-01 -Paragraph 24E -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_24E_a&doctype=Standard -URIDate 2019-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 91 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_91_a&doctype=Standard -URIDate 2019-03-27 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2021-01-01 -Name IFRS -Number 7 -IssueDate 2019-01-01 -Paragraph 23 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_23_c&doctype=Standard&book=b -URIDate 2019-03-27 + Details
Name: | ifrs-full_GainsLossesOnCashFlowHedgesNetOfTax
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of reclassification adjustments related to cash flow hedges, net of tax. Reclassification adjustments are amounts reclassified to profit (loss) in the current period that were recognised in other comprehensive income in the current or previous periods. [Refer: Cash flow hedges [member]; Other comprehensive income] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 92 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_92&doctype=Standard -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2019-01-01 -Paragraph 24C -Subparagraph b -Clause iv -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_24C_b_iv&doctype=Standard -URIDate 2019-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2019-01-01 -Paragraph 24E -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_24E_a&doctype=Standard -URIDate 2019-03-27 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2021-01-01 -Name IFRS -Number 7 -IssueDate 2019-01-01 -Paragraph 23 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_23_d&doctype=Standard&book=b -URIDate 2019-03-27 + Details
Name: | ifrs-full_ReclassificationAdjustmentsOnCashFlowHedgesNetOfTax
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | ifrs-full_ComponentsOfEquityAxis=bhp_ReserveOfCashFlowHedgesGrossMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis=bhp_IncreaseDecreaseDueToApplicationOfIFRS9Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ComponentsOfEquityAxis=bhp_ReserveOfCashFlowHedgesNetTaxMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ComponentsOfEquityAxis=ifrs-full_ReserveOfCashFlowHedgesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ComponentsOfEquityAxis=bhp_CostOfHedgingReserveGrossMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ComponentsOfEquityAxis=bhp_CostOfHedgingReserveNetTaxMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ComponentsOfEquityAxis=bhp_CostOfHedgingReserveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |