Earnings Per Share - Summary of Reconciliation of Earnings Attributable to Ordinary Shareholders (Detail) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Earnings per share [line items] | |||
| Earnings attributable to BHP shareholders | $ 9,833 | $ 9,019 | $ 7,897 |
| Loss/(gain) on sales of property, plant and equipment, intangibles and investments | 1 | (3) | (29) |
| Impairment of property, plant and equipment and intangibles net of reversals | 2,405 | 154 | 3,905 |
| (Gain)/loss on disposal of subsidiaries and operations | (65) | 117 | (915) |
| Tax effect of above adjustments | (30) | (34) | (928) |
| Subtotal of adjustments | 2,311 | 234 | 2,033 |
| Headline earnings | 12,144 | 9,253 | 9,930 |
| Diluted headline earnings | $ 12,144 | $ 9,253 | $ 9,930 |