Retirement Benefits - Net periodic pension cost recognized (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
United States
Defined Benefit Plan Disclosure [Line Items]
One-time charges related to divestitures	$ 0	$ 0	$ 0
Non-U.S. Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
One-time charges related to divestitures	0	(2,480)	0
Pension Plan | United States
Defined Benefit Plan Disclosure [Line Items]
Service cost	29,303	34,705	48,382
Interest cost	189,505	165,074	92,475
Expected return on plan assets	(257,531)	(237,704)	(227,302)
Amortization of prior service cost	907	536	3,500
Amortization of unrecognized actuarial loss	1,605	8,316	140,735
Amortization of transition obligation	0	0	0
Net periodic benefit cost	(36,211)	(29,073)	57,790
Pension Plan | Non-U.S. Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	22,033	22,713	28,256
Interest cost	79,489	60,394	17,775
Expected return on plan assets	(95,147)	(73,441)	(40,586)
Amortization of prior service cost	369	395	603
Amortization of unrecognized actuarial loss	6,389	8,862	16,553
Amortization of transition obligation	0	0	8
Net periodic benefit cost	$ 13,133	$ 16,443	$ 22,609