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Earnings Per Share - Summary of Reconciliation of Earnings Attributable to Ordinary Shareholders (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2019
Earnings per share [line items] |  |  |
Earnings attributable to BHP shareholders | $ 11,304 | $ 7,956 | $ 8,306
(Gain)/loss on sales of PP&E, Investments and Operations | (50) | 4 | (52)
Impairments of property, plant and equipment, financial assets and intangibles | 2,633 | 494 | 264
Impairment expense | 2,635 | 494 | 264
Other |  | 48 |
Recycling of re-measurements from equity to the income statement |  |  | (6)
Tax effect of above adjustments | (60) | 54 | (64)
Subtotal of adjustments | 3,100 | 695 | 238
Headline earnings | 14,404 | 8,651 | 8,544
Diluted headline earnings | 14,404 | 8,651 | 8,544
Samarco dam failure [member] |  |  |
Earnings per share [line items] |  |  |
Impairment expense | 111 | $ 95 | $ 96
Cerrejón [Member] |  |  |
Earnings per share [line items] |  |  |
Impairment expense | $ 466 |  |

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- Definition Basic headline earnings loss attributable to owners of the parent. + References No definition available. + Details
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- Definition Diluted headline earnings loss attributable to owners of the parent. + References No definition available. + Details
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- Definition Gains losses on disposals of property plant and equipment investment and operations. + References No definition available. + Details
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- Definition Other adjustments related to reconciling headline earnings to earnings attributable to ordinary shareholders. + References No definition available. + Details
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- Definition The profit (loss) from continuing and discontinued operations attributable to owners of the parent. [Refer: Profit (loss)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 81B -Subparagraph a -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_81B_a_ii&doctype=Standard -URIDate 2020-01-01 + Details
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