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Stockholders' Equity (Narrative) (Details) |  | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Nov. 30, 2017 USD ($) shares | Nov. 30, 2017 USD ($) shares | Jun. 30, 2021 USD ($) item $ / shares shares | Jun. 30, 2020 USD ($) $ / shares shares | Jun. 30, 2019 USD ($) shares | Feb. 21, 2014 shares | Apr. 30, 1997 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Shares authorized to be repurchased under repurchase program | shares |  |  |  |  |  | 20,000,000.0 |
Cost of common shares repurchased | $ |  |  |  |  | $ 22,845,000 |  |
Total number of shares repurchased pursuant to the repurchase program | shares |  |  | 41,836,234 | 41,836,234 |  |  |
Total cost of shares repurchased pursuant to the repurchase program | $ |  |  | $ 1,623,256,000 | $ 1,623,256,000 |  |  |
Additional shares that can be repurchased under the approved share repurchase program | shares |  |  | 12,900,000 |  |  |  |
Preferred stock, shares authorized | shares |  |  | 2,000,000 | 2,000,000 |  |  | 2,000,000
Preferred stock at par value | $ / shares |  |  | $ 0.01 | $ 0.01 |  |  | $ 0.01
Preferred stock, shares issued | shares |  |  | 0 | 0 |  |  |
Preferred stock, shares outstanding | shares |  |  | 0 |  |  |  |
Expiration period |  |  | 7 years |  |  |  |
Reduction in the number of shares of common stock available for issuance |  |  | 2.8 |  |  |  |
Maximum number of shares subject to awards granted | shares |  |  | 3,000,000 |  |  |  |
Number of common stock shares granted in participant's initial year of hiring | shares |  |  | 4,500,000 |  |  |  |
Fair value of RSUs and PRSUs | $ |  |  | $ 59,600,000 | $ 56,800,000 | 52,300,000 |  |
Aggregate intrinsic value of the options exercised | $ |  |  | 8,900,000 | $ 31,200,000 | $ 15,100,000 |  |
Aggregate intrinsic value of the stock-based compensation arrangements outstanding | $ |  |  | 158,500,000 |  |  |  |
Aggregate intrinsic value of the stock-based compensation arrangements exercisable | $ |  |  | 132,100,000 |  |  |  |
Aggregate intrinsic value of the stock-based compensation arrangements exercisable, vested and expected to vest | $ |  |  | $ 157,600,000 |  |  |  |
Shares issued under Employee Stock Purchase Plan | shares |  |  | 229,000 | 265,000 | 285,000 |  |
Number of offerings for Employee Stock Purchase Plan | item |  |  | 2 |  |  |  |
Stock-based compensation expense | $ |  |  | $ 63,927,000 | $ 57,559,000 | $ 52,073,000 |  |
Unrecognized compensation costs related to unvested stock-based compensation arrangements | $ |  |  | $ 94,300,000 |  |  |  |
Expected weighted average period of unrecognized compensation costs related to unvested stock-based compensation arrangements |  |  | 2 years 2 months 12 days |  |  |  |
Treasury Stock [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Common shares repurchased under repurchase program | shares |  |  |  |  | 200,000 |  |
Cost of common shares repurchased | $ |  |  |  |  | $ 22,844,000 |  |
Total number of shares repurchased pursuant to the repurchase program | shares |  |  | 41,800,000 |  |  |  |
Total cost of shares repurchased pursuant to the repurchase program | $ |  |  | $ 1,600,000,000 |  |  |  |
Shares issued under Employee Stock Purchase Plan | shares |  |  |  |  |  |  |
2009 Plan [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Extended period |  | 4 years |  |  |  |  |
Expiration date |  | Sep. 11, 2027 |  |  |  |  |
Common stock authorized for issuance | shares |  |  | 51,100,000 |  |  |  |
Common stock authorized for issuance and pending registration | shares | 7,400,000 | 7,400,000 |  |  |  |  |
Number of securities remaining available for future issuance | shares |  |  | 15,500,000 |  |  |  |
Amended And Restated 2009 Plan [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Maximum amount payable pursant to cash denominated performance awards granted | $ | $ 3,000,000.0 | $ 5,000,000.0 |  |  |  |  |
Amended And Restated 2009 Plan [Member] | Non Employee Director [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Maximum award amount with other cash fees earned for services | $ |  | 700,000 |  |  |  |  |
Amended And Restated 2009 Plan [Member] | Board Of Directors Chairman [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Maximum award amount with other cash fees earned for services | $ |  | $ 1,200,000 |  |  |  |  |
Employee Stock Purchase Plan [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Number of securities remaining available for future issuance | shares |  |  | 1,800,000 |  |  |  |
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 | $ |  |  | $ 10,900,000 | $ 8,000,000.0 | $ 6,400,000 |  |
Minimum [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
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] |  |  |  |  |  |  |
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 |  |  |  |
Performance Restricted Stock Units (PRSUs) [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Vesting period |  |  | 3 years |  |  |  |
Maximum amount to be issued under award, percentage |  |  | 225.00% |  |  |  |

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