Revenue recognition - Schedule of Total Revenue by Geographic Region (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2026	Mar. 31, 2025
Disaggregation of Revenue [Line Items]
Net sales	$ 5,486	$ 4,960	$ 15,744	$ 14,607
North America
Disaggregation of Revenue [Line Items]
Net sales	3,687	3,369	10,559	9,901
Europe
Disaggregation of Revenue [Line Items]
Net sales	1,086	974	3,065	2,806
Asia Pacific
Disaggregation of Revenue [Line Items]
Net sales	658	563	1,954	1,739
Latin America
Disaggregation of Revenue [Line Items]
Net sales	$ 55	$ 54	$ 166	$ 161