Dividends - Summary of Franking Credits (Parenthetical) (Detail) $ in Millions	12 Months Ended
Jun. 30, 2026 USD ($)
BHP Group Limited [member]
Disclosure of dividends [line items]
Decrease in franking account balance due to payment of final dividend	$ 2,156

Decrease in franking credits available due to payment of the final dividend.

No definition available.

Name:	bhp_DecreaseInFrankingCreditsAvailableDueToPaymentOfFinalDividend
Namespace Prefix:	bhp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration