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Employee Benefits And Stock-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2023
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |
Classification Of Stock-Based Compensation | The following table presents the classification of stock-based compensation:
| Year Ended December 31,
| 2023 |  | 2022 |  | 2021
| (In millions)
Cost of revenues | $ | 7.1 |  |  | $ | 7.2 |  |  | $ | 6.5 |
Research and development | 10.0 |  |  | 9.5 |  |  | 8.3 |
Selling, general and administrative | 42.6 |  |  | 41.9 |  |  | 38.6 |
Stock-based compensation expense | 59.7 |  |  | 58.6 |  |  | 53.4 |
Capitalization (included in Property and equipment, net) | 1.1 |  |  | 1.6 |  |  | 1.7 |
Total stock-based compensation | $ | 60.8 |  |  | $ | 60.2 |  |  | $ | 55.1 |
Nature Of Total Stock-Based Compensation | The following table presents the nature of the Company’s total stock-based compensation:
| Year Ended December 31,
| 2023 |  | 2022 |  | 2021
| (In millions)
RSUs | $ | 47.1 |  |  | $ | 43.8 |  |  | $ | 41.5 |
PSUs | 9.3 |  |  | 12.1 |  |  | 9.3 |
ESPP | 4.4 |  |  | 4.3 |  |  | 4.3 |
Total stock-based compensation | $ | 60.8 |  |  | $ | 60.2 |  |  | $ | 55.1 |
Summary Of Unvested RSUs Activity | The following table summarizes unvested RSUs activity for the year ended December 31, 2023:
| Shares |  | Weighted-Average Grant-Date Fair Value |  |
| (Shares in millions) |  |
Unvested at beginning of period | 0.6 |  |  | $ | 206.32 |  |  |
Granted | 0.4 |  |  | $ | 212.80 |  |  |
Vested and settled | (0.3) |  |  | $ | 205.66 |  |  |
Unvested at end of period | 0.7 |  |  | $ | 209.80 |  |  |

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- Definition Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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