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Stockholders' Equity, Stock Plans (Details) | 12 Months Ended |  |  |  |  |  |  |  |  |
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Dec. 31, 2024 Officer $ / shares shares | Dec. 31, 2019 shares | Dec. 31, 2018 shares | Dec. 31, 2017 shares | Dec. 31, 2016 shares | Dec. 31, 2015 shares | Dec. 31, 2014 shares | Dec. 31, 2013 shares | Dec. 31, 2012 shares | Dec. 31, 2011 shares | Dec. 31, 2010 shares | Dec. 31, 2009 shares | Jun. 30, 2024 shares | Dec. 31, 2023 shares | Jun. 30, 2023 shares | Jun. 30, 2021 shares | Dec. 31, 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) | 14,717,000 |  |  |  |  |  |  |  |  |  |  |  |  | 14,091,000 |  |  |  |  |  |  |
Number of options exercisable (in shares) | 10,089,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
1989 Stock Option Plan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Plans [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares authorized for issuance under the Plan (in shares) | 20,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of options outstanding (in shares) | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares available for grant (in shares) | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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) |  |  |  |  |  |  |  |  |  |  |  |  | 38,500,000 |  | 35,200,000 | 29,700,000 |  | 23,000,000 | 16,000,000 | 11,000,000 | 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) | 13,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of options exercisable (in shares) | 9,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares available for grant (in shares) | 7,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Award term | 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) | 3,900,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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) | 500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of options exercisable (in shares) | 200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares available for grant (in shares) | 800,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Award term | 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) | 200,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2002 Non-Employee Directors' Stock Option Plan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock Plans [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares authorized for issuance under the Plan (in shares) |  |  |  |  |  | 2,000,000 | 1,200,000 |  |  |  |  |  |  |  |  |  | 2,800,000 |  |  |  |
Number of options outstanding (in shares) | 900,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of options exercisable (in shares) | 800,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares available for grant (in shares) | 400,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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) | 52,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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 | 150,000 | 150,000 | 150,000 | 150,000 | 150,000 | 150,000 | 150,000 | 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) | 100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average purchase price (in dollars per share) | $ / shares | $ 35.93 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares available for purchase under ESPP (in shares) | 300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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