Pension and Other Postretirement Benefits - Schedule of Weighted-average Asset Allocations by Asset Category (Details) - United States - Pension Benefits	Jun. 30, 2017	Jun. 30, 2016
Defined Benefit Plan Disclosure [Line Items]
Total	100.00%	100.00%
Equity securities
Defined Benefit Plan Disclosure [Line Items]
Total	55.00%	55.40%
Fixed income securities
Defined Benefit Plan Disclosure [Line Items]
Total	45.00%	44.20%
Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Total	0.00%	0.40%