Stockholders' Equity (Schedule Of Total Stock-Based Compensation Costs Incurred And Associated Tax Benefit Recognized) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation costs	$ 63,927	$ 57,559	$ 52,073
Tax benefit	(23,346)	(39,534)	(26,658)
Stock-based compensation costs, net of tax benefit	40,581	18,025	25,415
Cost of Sales [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation costs	4,153	3,703	3,043
Selling, General And Administrative Expenses [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation costs	51,727	47,265	42,700
Research And Development Expense [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation costs	$ 8,047	$ 6,591	$ 6,330