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Share-Based Payments (Tables) | 3 Months Ended
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Mar. 31, 2025
Share-Based Payment Arrangement [Abstract] |
Share-based compensation expense included in condensed consolidated statements of income | The following table summarizes share-based compensation expense included in our condensed consolidated statements of income:
|  | For the Three Months Ended March 31, |  |
(In millions) |  | 2025 |  | 2024 |  |  |  |
Research and development |  | $ | 32.1 |  |  | $ | 27.4 |  |  |  |  |
Selling, general and administrative |  | 52.0 |  |  | 44.0 |  |  |  |  |
Subtotal |  | 84.1 |  |  | 71.4 |  |  |  |  |
Capitalized share-based compensation costs |  | (3.1) |  |  | (3.3) |  |  |  |  |
Share-based compensation expense included in total cost and expense |  | 81.0 |  |  | 68.1 |  |  |  |  |
Income tax effect |  | (16.0) |  |  | (12.9) |  |  |  |  |
Share-based compensation expense included in net income attributable to Biogen Inc. |  | $ | 65.0 |  |  | $ | 55.2 |  |  |  |  |
Summary of share-based compensation expense associated with each of our share-based compensating programs | The following table summarizes share-based compensation expense associated with each of our share-based compensation programs:
|  | For the Three Months Ended March 31, |  |
(In millions) |  | 2025 |  | 2024 |  |  |  |
Time-vested restricted stock units |  | $ | 66.1 |  |  | $ | 57.3 |  |  |  |  |
Performance stock units settled in stock |  | 13.6 |  |  | 10.5 |  |  |  |  |
Employee stock purchase plan |  | 3.5 |  |  | 4.5 |  |  |  |  |
Performance stock units settled in cash |  | — |  |  | (2.1) |  |  |  |  |
Stock options |  | 0.9 |  |  | 0.9 |  |  |  |  |
Market stock units |  | — |  |  | 0.3 |  |  |  |  |
Subtotal |  | 84.1 |  |  | 71.4 |  |  |  |  |
Capitalized share-based compensation costs |  | (3.1) |  |  | (3.3) |  |  |  |  |
Share-based compensation expense included in total cost and expense |  | $ | 81.0 |  |  | $ | 68.1 |  |  |  |  |

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- Definition Tabular disclosure of cost recognized for award under share-based payment arrangement by plan. Includes, but is not limited to, related tax benefit. + 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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- 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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