Pension and Other Postretirement Benefits - Schedule of Components of the Net Periodic Benefit Cost (Details)	Jun. 30, 2016	Jun. 30, 2015
Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.92%	4.50%
Rate of compensation increase	3.49%	3.52%
Other Postretirement Plans
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.86%	4.40%