Pension and Other Postretirement Benefits - Significant Assumptions to Determine the Present Value of Net Benefit Obligations and the Net Periodic Costs (Benefits) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Annual assumed rate of increase in per capita cost of covered benefits for postretirement benefit plans
Health Care Cost Trend Rate Assumed for Next Year	7.50%	8.00%	8.50%
Rate to which the Cost Trend Rate Gradually Declines	5.00%	5.00%	5.00%
Year that the Rate Reaches the Rate at which it is assumed to Remain	2027	2027	2027
Calculated effect of change on assumption used to calculate cost components and obligations of healthcare plans
Effect on Total Service and Interest Cost Components, Increase	$ 27
Effect on Total Service and Interest Cost Components, Decrease	(24)
Effect on Other Postretirement Obligation, Increase	492
Effect on Other Postretirement Obligation, Decrease	$ (437)
U.S. Plans [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase	4.00%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	7.30%	7.50%	7.50%
International Plans [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	5.30%
Minimum [Member] | U.S. Plans [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase		3.00%	3.00%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	3.30%	2.40%	3.20%
Minimum [Member] | International Plans [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase	2.50%	2.50%	2.50%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	2.00%	0.90%	2.30%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets		5.30%	5.30%
Maximum [Member] | U.S. Plans [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase		4.00%	4.00%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	3.90%	3.70%	4.50%
Maximum [Member] | International Plans [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase	3.00%	3.00%	3.00%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	3.30%	3.20%	3.80%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets		5.50%	5.50%