Employee Benefit Plans (Shares Reserved for Issuance) (Details) - shares shares in Thousands	Mar. 31, 2019	Jun. 30, 2018
Class Of Stock [Line Items]
Shares reserved for issuance	29,369	27,382
2014 Employee Stock Purchase Plan
Class Of Stock [Line Items]
Shares reserved for issuance	10,085	5,365
Employee Stock Options and Awards Outstanding
Class Of Stock [Line Items]
Shares reserved for issuance	11,192	12,060
2013 Equity Incentive Plan Shares Available for Grant
Class Of Stock [Line Items]
Shares reserved for issuance	8,092	9,957