Consolidated Statements Of Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-In Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total
Beginning balance at Jun. 30, 2016	$ 563	$ 1,303,238	$ (1,546,611)	$ 2,160,299	$ (222,658)	$ 1,694,831
Beginning balance, shares at Jun. 30, 2016	181,747,000		(41,086,000)
Common stock issued on exercise of options	$ 3	22,246				22,249
Common stock issued on exercise of options, shares	740,000
Common stock issued on vesting of restricted stock units, net of shares withheld for tax	$ 2	(8,159)				(8,157)
Common stock issued on vesting of restricted stock units, net of shares withheld for tax, shares	447,000
Common stock issued on employee stock purchase plan	$ 1	15,884				15,885
Common stock issued on employee stock purchase plan, shares	327,000
Treasury stock purchases
Treasury stock purchases, shares
Stock-based compensation costs		45,921				45,921
Other comprehensive income					33,599	33,599
Net income				342,284		342,284
Dividends declared				(186,346)		(186,346)
Ending balance at Jun. 30, 2017	$ 569	1,379,130	$ (1,546,611)	2,316,237	(189,059)	1,960,266
Ending balance, shares at Jun. 30, 2017	183,261,000		(41,086,000)
Common stock issued on exercise of options	$ 2	18,759				18,761
Common stock issued on exercise of options, shares	539,000
Common stock issued on vesting of restricted stock units, net of shares withheld for tax	$ 1	(15,385)				(15,384)
Common stock issued on vesting of restricted stock units, net of shares withheld for tax, shares	214,000
Common stock issued on employee stock purchase plan	$ 1	19,955				19,956
Common stock issued on employee stock purchase plan, shares	302,000
Treasury stock purchases	$ (2)		$ (53,801)			(53,803)
Treasury stock purchases, shares			(550,000)
Stock-based compensation costs		48,362				48,362
Other comprehensive income					(35,269)	(35,269)
Net income				315,588		315,588
Dividends declared				(199,497)		(199,497)
Ending balance at Jun. 30, 2018	$ 571	1,450,821	$ (1,600,412)	2,432,328	(224,328)	2,058,980
Ending balance, shares at Jun. 30, 2018	184,316,000		(41,636,000)
Common stock issued on exercise of options	$ 1	12,329				$ 12,330
Common stock issued on exercise of options, shares	252,000					252,371
Common stock issued on vesting of restricted stock units, net of shares withheld for tax	$ 3	(28,104)				$ (28,101)
Common stock issued on vesting of restricted stock units, net of shares withheld for tax, shares	638,000
Common stock issued on employee stock purchase plan	$ 1	24,364				24,365
Common stock issued on employee stock purchase plan, shares	285,000
Treasury stock purchases	$ (1)		$ (22,844)			(22,845)
Treasury stock purchases, shares			(200,000)
Stock-based compensation costs		52,063				52,063
Other comprehensive income					(28,681)	(28,681)
Net income				404,592		404,592
Dividends declared				(211,712)		(211,712)
Ending balance at Jun. 30, 2019	$ 575	1,511,473	$ (1,623,256)	2,436,410	(253,009)	2,072,193
Ending balance, shares at Jun. 30, 2019	185,491,000		(41,836,000)
Cumulative effect of change in accounting standards				$ (188,798)		$ (188,798)