Retirement Benefit Obligations - Schedule of Assumptions Used (Detail)	12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021
Postretirement Benefits
Weighted-average assumptions used to determine benefit obligations
Discount rate	5.50%	4.60%	2.40%
Weighted-average assumptions used to determine net periodic benefit cost
Discount rate for PBO	4.60%	2.40%	2.50%
Discount rate for Service Cost	4.90%	2.80%	2.90%
Discount rate for Interest on PBO	4.30%	1.70%	1.80%
Domestic Pension Benefits
Weighted-average assumptions used to determine benefit obligations
Discount rate	5.40%	4.90%	2.90%
Weighted-average assumptions used to determine net periodic benefit cost
Discount rate for PBO	4.90%	2.90%	2.90%
Discount rate for Service Cost		3.30%	3.40%
Discount rate for Interest on PBO	4.60%	2.20%	2.20%
Expected return on plan assets	5.50%	5.80%	5.50%
Foreign Pension Benefits
Weighted-average assumptions used to determine benefit obligations
Discount rate	5.40%	3.90%	1.90%
Rate of increase in future compensation	3.90%	3.90%	3.60%
Weighted-average assumptions used to determine net periodic benefit cost
Discount rate for PBO	3.90%	1.90%	1.70%
Discount rate for Service Cost	4.80%	1.80%	1.80%
Discount rate for Interest on PBO	3.80%	1.60%	1.50%
Expected return on plan assets	3.90%	3.30%	3.30%
Rate of increase in future compensation	3.90%	3.60%	3.10%