Supply chain financing (Details) - USD ($) $ in Millions	6 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Jun. 30, 2024
Payables and Accruals [Abstract]
Payable to suppliers who have elected to participate in the supply chain financing programs	$ 119		$ 116
Amounts settled through supply chain financing programs and paid to participating financial intermediaries	$ 215	$ 140