Dividends and other reserves - Schedule of dividends (Details) - USD ($) $ / shares in Units, $ in Millions	6 Months Ended	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Jun. 30, 2025	Jun. 30, 2024
Share Capital, Reserves And Other Equity Interest [Abstract]
Final dividend for the year ended 30 June 2025 of 62.98 cents per share (2024 - 62.98 cents)	$ 1,401	$ 1,399
Final dividend per share (in USD per share)			$ 0.6298	$ 0.6298

The amount of dividends relating to prior years, recognised as distributions to owners of the parent. [Refer: Parent [member]]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Note Expiry date 2027-01-01
-Name IAS
-Number 1
-IssueDate 2025-01-01
-Paragraph 106
-Subparagraph d
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_106_d&doctype=Standard
-URIDate 2025-03-27

Name:	ifrs-full_DividendsRecognisedAsDistributionsToOwnersOfParentRelatingToPriorYears
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration