Retirement Benefit Obligations - Schedule of Assumptions Used (Detail)	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Domestic Pension Benefits [Member]
Weighted-average assumptions used to determine benefit obligations
Discount rate	3.70%	4.50%	4.50%
Rate of increase in future compensation		3.00%
Weighted-average assumptions used to determine net periodic benefit cost
Discount rate	4.50%	4.50%	5.00%
Expected return on plan assets	6.50%	7.00%	7.00%
Rate of increase in future compensation	3.00%	3.00%	5.30%
Foreign Pension Benefits [Member]
Weighted-average assumptions used to determine benefit obligations
Discount rate	2.90%	3.70%	4.20%
Rate of increase in future compensation	2.70%	2.90%	3.60%
Weighted-average assumptions used to determine net periodic benefit cost
Discount rate	3.70%	4.20%	4.50%
Expected return on plan assets	5.50%	6.20%	6.80%
Rate of increase in future compensation	2.90%	3.60%	3.70%
Postretirement Benefits [Member]
Weighted-average assumptions used to determine benefit obligations
Discount rate	3.40%	4.20%	4.00%
Weighted-average assumptions used to determine net periodic benefit cost
Discount rate	4.20%	4.00%	4.70%