Share-based Compensation (Shares Reserved for Issuance) (Details) - shares shares in Thousands	Sep. 30, 2017	Jun. 30, 2017
Class Of Stock [Line Items]
Shares reserved for issuance	22,000	25,140
2014 Employee Stock Purchase Plan
Class Of Stock [Line Items]
Shares reserved for issuance	6,517	7,785
Employee Stock Options and Awards Outstanding
Class Of Stock [Line Items]
Shares reserved for issuance	10,130	9,726
2013 Equity Incentive Plan Shares Available for Grant
Class Of Stock [Line Items]
Shares reserved for issuance	5,353	7,629