Share-based Compensation (Shares Reserved for Issuance) (Details) - shares shares in Thousands	Mar. 31, 2018	Jun. 30, 2017
Class Of Stock [Line Items]
Shares reserved for issuance	27,714	25,140
2014 Employee Stock Purchase Plan
Class Of Stock [Line Items]
Shares reserved for issuance	5,365	7,785
Employee Stock Options and Awards Outstanding
Class Of Stock [Line Items]
Shares reserved for issuance	10,405	9,726
2013 Equity Incentive Plan Shares Available for Grant
Class Of Stock [Line Items]
Shares reserved for issuance	11,944	7,629