Stockholders' Equity (Schedule Of Total Stock-Based Compensation Costs Incurred And Associated Tax Benefit Recognized) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation costs	$ 48,412	$ 45,925	$ 46,408
Tax benefit	(17,078)	(20,100)	(25,020)
Stock-based compensation costs, net of tax benefit	31,334	25,825	21,388
Cost of Sales - Capitalized As Part Of Inventory [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation costs	2,990	2,877	2,731
Selling, General and Administrative Expenses [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation costs	39,754	37,096	36,994
Research and Development Expense [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation costs	$ 5,668	$ 5,952	$ 6,683