Summary of Significant Accounting Policies Revenue Recognition (Details)	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Ship and Bill [Member]
Deferred Revenue Arrangement [Line Items]
Percentage Of Revenue Recognized	44.00%	44.00%	35.00%
Multiple Delivery Revenue [Member]
Deferred Revenue Arrangement [Line Items]
Percentage Of Revenue Recognized	35.00%	33.00%	37.00%
Contract Accounting [Member]
Deferred Revenue Arrangement [Line Items]
Percentage Of Revenue Recognized	21.00%	23.00%	28.00%