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Stockholders' Equity, Stock Plans (Details) | 1 Months Ended | 12 Months Ended |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jun. 30, 2009 shares | Dec. 31, 2021 Officer $ / shares shares | Jun. 30, 2021 shares | Dec. 31, 2020 shares | Jun. 30, 2020 shares | Jun. 30, 2019 shares | May 31, 2017 shares | Jun. 30, 2015 shares | May 31, 2015 shares
Stock Options [Member] |  |  |  |  |  |  |  |  |
Stock Plans [Abstract] |  |  |  |  |  |  |  |  |
Number of options outstanding (in shares) |  | 14,089,000 |  | 12,439,000 |  |  |  |  |
Number of options exercisable (in shares) |  | 9,175,000 |  |  |  |  |  |  |
1989 Stock Option Plan [Member] |  |  |  |  |  |  |  |  |
Stock Plans [Abstract] |  |  |  |  |  |  |  |  |
Number of shares authorized for issuance under the Plan (in shares) |  | 20,000,000.0 |  |  |  |  |  |  |
Number of options outstanding (in shares) |  | 28,000 |  |  |  |  |  |  |
Number of options exercisable (in shares) |  | 28,000 |  |  |  |  |  |  |
Number of shares available for grant (in shares) |  | 49,000 |  |  |  |  |  |  |
1989 Stock Option Plan [Member] | Stock Options [Member] |  |  |  |  |  |  |  |  |
Stock Plans [Abstract] |  |  |  |  |  |  |  |  |
Vesting period |  | 4 years |  |  |  |  |  |  |
Award term |  | 7 years |  |  |  |  |  |  |
1989 Stock Option Plan [Member] | Stock Options [Member] | One Year from Date of Grant [Member] |  |  |  |  |  |  |  |  |
Stock Plans [Abstract] |  |  |  |  |  |  |  |  |
Vesting percentage |  | 25.00% |  |  |  |  |  |  |
Period before options are exercisable |  | 1 year |  |  |  |  |  |  |
2011 Equity Incentive Plan [Member] |  |  |  |  |  |  |  |  |
Stock Plans [Abstract] |  |  |  |  |  |  |  |  |
Number of shares authorized for issuance under the Plan (in shares) |  |  | 29,700,000 |  |  | 23,000,000.0 | 16,000,000.0 | 11,000,000.0 | 5,500,000
Reduction in fungible share reserve for each share issued pursuant to full value award (n shares) |  |  | (1.7) |  |  |  |  |  |
Increase in fungible share reserve for each share returning from a full value award (in shares) |  |  | 1.7 |  |  |  |  |  |
Number of options outstanding (in shares) |  | 12,800,000 |  |  |  |  |  |  |
Number of options exercisable (in shares) |  | 8,300,000 |  |  |  |  |  |  |
Number of shares available for grant (in shares) |  | 8,500,000 |  |  |  |  |  |  |
Number of executive officers terminated before change in control when vesting will accelerate for executive officers | Officer |  | 1 |  |  |  |  |  |  |
Period before change in control when vesting will accelerate for executive officers |  | 3 months |  |  |  |  |  |  |
Period after change in control when vesting will accelerate for executive officers |  | 12 months |  |  |  |  |  |  |
2011 Equity Incentive Plan [Member] | Stock Options [Member] |  |  |  |  |  |  |  |  |
Stock Plans [Abstract] |  |  |  |  |  |  |  |  |
Vesting period |  | 4 years |  |  |  |  |  |  |
Award term |  | 7 years |  |  |  |  |  |  |
2011 Equity Incentive Plan [Member] | Stock Options [Member] | Issued after December 31, 2021 [Member] |  |  |  |  |  |  |  |  |
Stock Plans [Abstract] |  |  |  |  |  |  |  |  |
Vesting period |  | 10 years |  |  |  |  |  |  |
2011 Equity Incentive Plan [Member] | Stock Options [Member] | One Year from Date of Grant [Member] |  |  |  |  |  |  |  |  |
Stock Plans [Abstract] |  |  |  |  |  |  |  |  |
Vesting percentage |  | 25.00% |  |  |  |  |  |  |
Period before options are exercisable |  | 1 year |  |  |  |  |  |  |
2011 Equity Incentive Plan [Member] | Restricted Stock Units [Member] |  |  |  |  |  |  |  |  |
Stock Plans [Abstract] |  |  |  |  |  |  |  |  |
Vesting period |  | 4 years |  |  |  |  |  |  |
Number of awards outstanding (in shares) |  | 2,500,000 |  |  |  |  |  |  |
2020 Equity Incentive Plan [Member] |  |  |  |  |  |  |  |  |
Stock Plans [Abstract] |  |  |  |  |  |  |  |  |
Number of shares authorized for issuance under the Plan (in shares) |  |  | 1,600,000 | 2,600,000 |  |  |  |  |
Number of options outstanding (in shares) |  | 200,000 |  |  |  |  |  |  |
Number of options exercisable (in shares) |  | 0 |  |  |  |  |  |  |
Number of shares available for grant (in shares) |  | 1,300,000 |  |  |  |  |  |  |
2020 Equity Incentive Plan [Member] | Stock Options [Member] |  |  |  |  |  |  |  |  |
Stock Plans [Abstract] |  |  |  |  |  |  |  |  |
Vesting period |  | 4 years |  |  |  |  |  |  |
Award term |  | 7 years |  |  |  |  |  |  |
2020 Equity Incentive Plan [Member] | Stock Options [Member] | Issued after December 31, 2021 [Member] |  |  |  |  |  |  |  |  |
Stock Plans [Abstract] |  |  |  |  |  |  |  |  |
Vesting period |  | 10 years |  |  |  |  |  |  |
2020 Equity Incentive Plan [Member] | Stock Options [Member] | One Year from Date of Grant [Member] |  |  |  |  |  |  |  |  |
Stock Plans [Abstract] |  |  |  |  |  |  |  |  |
Vesting percentage |  | 25.00% |  |  |  |  |  |  |
Period before options are exercisable |  | 1 year |  |  |  |  |  |  |
2020 Equity Incentive Plan [Member] | Restricted Stock Units [Member] |  |  |  |  |  |  |  |  |
Stock Plans [Abstract] |  |  |  |  |  |  |  |  |
Vesting period |  | 4 years |  |  |  |  |  |  |
Number of awards outstanding (in shares) |  | 100,000 |  |  |  |  |  |  |
2002 Non-Employee Directors' Stock Option Plan [Member] |  |  |  |  |  |  |  |  |
Stock Plans [Abstract] |  |  |  |  |  |  |  |  |
Number of shares authorized for issuance under the Plan (in shares) |  |  |  |  | 2,800,000 |  |  | 2,000,000.0 | 1,200,000
Number of options outstanding (in shares) |  | 1,000,000.0 |  |  |  |  |  |  |
Number of options exercisable (in shares) |  | 800,000 |  |  |  |  |  |  |
Number of shares available for grant (in shares) |  | 700,000 |  |  |  |  |  |  |
2002 Non-Employee Directors' Stock Option Plan [Member] | Stock Options [Member] |  |  |  |  |  |  |  |  |
Stock Plans [Abstract] |  |  |  |  |  |  |  |  |
Award term |  | 10 years |  |  |  |  |  |  |
2002 Non-Employee Directors' Stock Option Plan [Member] | Restricted Stock Units [Member] |  |  |  |  |  |  |  |  |
Stock Plans [Abstract] |  |  |  |  |  |  |  |  |
Number of awards outstanding (in shares) |  | 100,000 |  |  |  |  |  |  |
Employee Stock Purchase Plan [Member] |  |  |  |  |  |  |  |  |
Stock Plans [Abstract] |  |  |  |  |  |  |  |  |
Number of shares authorized for issuance under the Plan (in shares) |  | 3,200,000 |  |  |  |  |  |  |
Number of additional shares reserved for issuance (in shares) | 150,000 | 150,000 |  |  |  |  |  |  |
Maximum percentage of employee compensation used to purchase shares |  | 10.00% |  |  |  |  |  |  |
Percentage of fair market value used to determine purchase price of stock |  | 85.00% |  |  |  |  |  |  |
Holding period for purchased stock |  | 6 months |  |  |  |  |  |  |
Shares purchased and issued under ESPP (in shares) |  | 70,000.00 |  |  |  |  |  |  |
Weighted average purchase price (in dollars per share) | $ / shares |  | $ 39.26 |  |  |  |  |  |  |
Shares available for purchase under ESPP (in shares) |  | 600,000 |  |  |  |  |  |  |

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