Debt - Narrative (Details) € in Millions, $ in Millions	12 Months Ended
	Jun. 30, 2025 USD ($)	Jun. 30, 2025 EUR (€)	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2025 EUR (€)
Debt Instrument [Line Items]
Payments for long-term borrowings	$ 1,741		$ 2,385	$ 2,341
Long-term debt payable in 2026	7
Long-term debt payable in 2027	706
Long-term debt payable in 2028	1,200
Long-term debt payable in 2029	1,000
Long-term debt payable in 2030	$ 1,800
2.90% Senior Notes Due 2030 | Senior Notes
Debt Instrument [Line Items]
Aggregate principal amount (in EUR) | €					€ 700
Interest rate (as percent)	2.90%				2.90%
1.125% Senior Notes Due 2025 | Senior Notes
Debt Instrument [Line Items]
Interest rate (as percent)	1.125%				1.125%
Payments for long-term borrowings | €		€ 700
Term Loan Facility | Loans Payable | Line of Credit
Debt Instrument [Line Items]
Payments for long-term borrowings	$ 490
3.30% Fixed-rate medium term notes, due 2025 | Medium-Term Notes
Debt Instrument [Line Items]
Interest rate (as percent)	3.30%				3.30%
Payments for long-term borrowings	$ 500
Senior Notes, 2.70%, Matured in 2024 | Senior Notes
Debt Instrument [Line Items]
Interest rate (as percent)			2.70%
Payments for long-term borrowings			$ 575
Senior Notes, 3.65%, Matured in 2024 | Senior Notes
Debt Instrument [Line Items]
Interest rate (as percent)			3.65%
Payments for long-term borrowings			$ 1,400