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Intangible Assets and Goodwill (Tables) | 3 Months Ended
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Mar. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract] |
Intangible assets | Intangible assets, net of accumulated amortization, impairment charges and adjustments are summarized as follows:
|  |  |  | As of March 31, 2024 |  | As of December 31, 2023
(In millions) |  | Estimated Life |  | Cost |  | Accumulated Amortization |  | Net |  | Cost |  | Accumulated Amortization |  | Net
Completed technology: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Acquired and in-licensed rights and patents |  | 2-22 years |  | $ | 10,480.2 |  |  | $ | (2,514.0) |  |  | $ | 7,966.2 |  |  | $ | 8,180.2 |  |  | $ | (2,440.7) |  |  | $ | 5,739.5 |
Developed technology and other |  | 13-31 years |  | 3,548.6 |  |  | (3,434.1) |  |  | 114.5 |  |  | 3,548.6 |  |  | (3,429.1) |  |  | 119.5 |
Total completed technology |  |  |  | 14,028.8 |  |  | (5,948.1) |  |  | 8,080.7 |  |  | 11,728.8 |  |  | (5,869.8) |  |  | 5,859.0 |
In-process research and development |  | Indefinite until commercialization |  | 40.0 |  |  | — |  |  | 40.0 |  |  | 2,340.0 |  |  | — |  |  | 2,340.0 |
Priority review voucher |  | Indefinite |  | 100.0 |  |  | — |  |  | 100.0 |  |  | 100.0 |  |  | — |  |  | 100.0 |
Trademarks and trade names |  | Indefinite |  | 64.0 |  |  | — |  |  | 64.0 |  |  | 64.0 |  |  | — |  |  | 64.0 |
Total intangible assets |  |  |  | $ | 14,232.8 |  |  | $ | (5,948.1) |  |  | $ | 8,284.7 |  |  | $ | 14,232.8 |  |  | $ | (5,869.8) |  |  | $ | 8,363.0 |
Estimated future amortization for acquired intangible assets | The estimated future amortization of finite-lived intangible assets for the next five years is expected to be as follows:
(In millions) |  | As of March 31, 2024
2024 (remaining nine months) |  | $ | 265.0 |
2025 |  | 565.0 |
2026 |  | 660.0 |
2027 |  | 685.0 |
2028 |  | 710.0 |
2029 |  | 715.0 |
Summary of roll forward of the changes in goodwill | The following table provides a roll forward of the changes in our goodwill balance:
(In millions) |  | As of March 31, 2024
Goodwill, December 31, 2023 |  | $ | 6,219.2 |
Goodwill resulting from Reata acquisition |  | 9.0 |
Other |  | (0.8) |
Goodwill, March 31, 2024 |  | $ | 6,227.4 |

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