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Stock-Based Compensation Expense | 9 Months Ended
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Sep. 30, 2024
Share-Based Payment Arrangement [Abstract] |
Stock-Based Compensation Expense | Stock-Based Compensation Expense Compensation expense related to stock-based awards was recorded as follows:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
(in millions) | 2024 |  | 2023 |  | 2024 |  | 2023
Cost of revenue | $ | 0.1 |  |  | $ | 0.1 |  |  | $ | 0.5 |  |  | $ | 0.3 |
Research and development expenses | 2.3 |  |  | 3.5 |  |  | 6.5 |  |  | 9.6 |
Selling, general and administrative expenses | 15.7 |  |  | 6.9 |  |  | 42.3 |  |  | 25.8 |
Total | $ | 18.1 |  |  | $ | 10.5 |  |  | $ | 49.3 |  |  | $ | 35.7 |

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- Definition The entire disclosure for shareholders' equity and share-based payment arrangement. Includes, but is not limited to, disclosure of policy and terms of share-based payment arrangement, deferred compensation arrangement, and employee stock purchase plan (ESPP). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/505/tableOfContent Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/718/tableOfContent + Details
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