Other income, net - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2025	Dec. 31, 2024
Other Income and Expenses [Abstract]
Sales to and services performed for equity method investments	$ 26	$ 23	$ 53	$ 43
Cash dividends from equity method investments			$ 112	$ 73