Retirement Benefits - Assumptions used to measure periodic benefit cost (Details) - Pension Plan	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
United States
Assumptions used to measure net periodic benefit cost
Discount rate	4.88%	4.36%	2.55%
Average increase in compensation	3.81%	3.35%	3.05%
Expected return on plan assets	7.00%	6.50%	6.50%
Minimum | Non-U.S. Pension Benefits
Assumptions used to measure net periodic benefit cost
Discount rate	0.90%	0.60%	0.25%
Average increase in compensation	2.00%	1.75%	1.75%
Expected return on plan assets	0.30%	1.00%	1.00%
Maximum | Non-U.S. Pension Benefits
Assumptions used to measure net periodic benefit cost
Discount rate	5.20%	5.06%	2.95%
Average increase in compensation	4.40%	4.00%	4.50%
Expected return on plan assets	6.80%	5.10%	4.50%