Supply chain financing (Details) - USD ($) $ in Millions	6 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Jun. 30, 2023
Payables and Accruals [Abstract]
Payable to suppliers who have elected to participate in the supply chain financing programs	$ 99		$ 85
Amounts settled through supply chain financing programs and paid to participating financial intermediaries	$ 140	$ 109