Consolidated Statements Of Stockholders' Equity - USD ($) shares in Millions, $ in Millions	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Beginning Balance, value at Jun. 30, 2013	$ 539.0	$ 0.5	$ 113.8	$ 454.7	$ (30.0)
Beginning Balance, Shares at Jun. 30, 2013		56.3
Shares issued under stock option/restricted stock/employee stock purchase plans, net, Shares		0.8
Shares issued under stock option/restricted stock/employee stock purchase plans, net	6.8		6.8
Stock-based compensation	15.3		15.3
Excess tax benefit related to employee equity awards	7.8		7.8
Stock Repurchase, Shares		(2.4)
Share repurchase	(152.4)		(143.7)	(8.7)
Unrealized gain (loss) on derivative instruments, net of taxes	5.1				5.1
Foreign currency translation adjustment	27.0				27.0
Net income	129.1			129.1
Ending Balance, Shares at Jun. 30, 2014		54.7
Ending Balance, value at Jun. 30, 2014	577.7	$ 0.5	0.0	575.1	2.1
Shares issued under stock option/restricted stock/employee stock purchase plans, net, Shares		0.9
Shares issued under stock option/restricted stock/employee stock purchase plans, net	12.7	$ 0.1	12.6
Stock-based compensation	17.9		17.9
Excess tax benefit related to employee equity awards	7.2		7.2
Stock Repurchase, Shares		(0.4)
Share repurchase	0.0
Unrealized gain (loss) on derivative instruments, net of taxes	(3.9)				(3.9)
Foreign currency translation adjustment	(94.1)				(94.1)
Net income	$ 147.8			147.8
Ending Balance, Shares at Jun. 30, 2015	55.2	55.2
Ending Balance, value at Jun. 30, 2015	$ 665.3	$ 0.6	37.7	722.9	(95.9)
Shares issued under stock option/restricted stock/employee stock purchase plans, net, Shares		0.9
Shares issued under stock option/restricted stock/employee stock purchase plans, net	13.9		13.9
Stock-based compensation	20.1		20.1
Excess tax benefit related to employee equity awards	19.3		4.0	15.3
Stock Repurchase, Shares		(3.2)
Share repurchase	(200.0)	$ (0.1)	(44.3)	(155.6)
Unrealized gain (loss) on derivative instruments, net of taxes	(5.8)				(5.8)
Foreign currency translation adjustment	(34.3)				(34.3)
Net income	$ 154.9			154.9
Ending Balance, Shares at Jun. 30, 2016	52.9	52.9
Ending Balance, value at Jun. 30, 2016	$ 633.4	$ 0.5	$ 31.4	$ 737.5	$ (136.0)