Goodwill and intangible assets - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible amortization expense	$ 140	$ 156
Estimated amortization expense, year ending June 30, 2024	550
Estimated amortization expense, year ending June 30, 2025	550
Estimated amortization expense, year ending June 30, 2026	547
Estimated amortization expense, year ending June 30, 2027	540
Estimated amortization expense, year ending June 30, 2028	$ 511