Employee Benefit Plans (Shares Reserved for Issuance) (Details) - shares shares in Thousands	Sep. 30, 2019	Jun. 30, 2019
Class Of Stock [Line Items]
Shares reserved for issuance	26,764	29,002
2014 Employee Stock Purchase Plan
Class Of Stock [Line Items]
Shares reserved for issuance	8,862	10,085
Employee Stock Options and Awards Outstanding
Class Of Stock [Line Items]
Shares reserved for issuance	14,566	10,455
2013 Equity Incentive Plan Shares Available for Grant
Class Of Stock [Line Items]
Shares reserved for issuance	3,336	8,462