Stockholders' Equity (Narrative) (Details) (USD $)	12 Months Ended			30 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012	Feb. 20, 2014	Feb. 21, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares authorized to be repurchased under repurchase program					20,000,000
Common shares repurchased	4,400,000	4,300,000		18,100,000
Cost of common shares repurchased	$ 208,100,000	$ 188,000,000
Additional shares that can be repurchased under the approved share repurchase program	18,300,000
Number of shares repurchased pursuant to the repurchase program	36,442,495	32,026,013
Cost of shares repurchased pursuant to the repurchase program	1,291,910,000	1,083,845,000
Preferred stock, shares authorized	2,000,000	2,000,000
Preferred stock at par value	$ 0.01	$ 0.01
Preferred stock, shares issued	0	0
Stock option and restricted stock units expiration period	7 years
Common stock authorized for issuance	43,700,000
Number of securities remaining available for future issuance	16,300,000
Reduction in the number of shares of common stock available for issuance	2.8
Maximum number of shares subject to awards granted	3,000,000
Number of common stock shares granted in participant's initial year of hiring	4,500,000
Unrecognized compensation costs related to unvested stock-based compensation arrangements	74,300,000
Expected weighted average period of unrecognized compensation costs related to unvested stock-based compensation arrangements	2 years 2 months 12 days
Aggregate intrinsic value of the stock-based compensation arrangements outstanding	246,700,000
Aggregate intrinsic value of the stock-based compensation arrangements exercisable	108,000,000
Aggregate intrinsic value of the options exercised	50,200,000	77,800,000	45,300,000
Stock-based compensation expense	43,457,000	38,157,000	30,586,000
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of securities remaining available for future issuance	1,800,000
Stock issued under Employee Stock Purchase Plans	314,000	324,000
Percentage of purchase price of common stock lower than the fair market value of common stock on the date of grant	85.00%
Percentage of purchase price of common stock lower than the fair market value of common stock on the date of purchase	85.00%
Stock-based compensation expense	3,100,000	2,800,000
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options and restricted stock units vesting period	1 year
Minimum [Member] | Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee stock purchase program offering period	3 months
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options and restricted stock units vesting period	4 years
Maximum [Member] | Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee stock purchase program offering period	27 months
Common stock shares subscribed	$ 25,000