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Intangible Assets and Goodwill (Tables) | 9 Months Ended
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Dec. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Finite-Lived Intangible Assets | Net amounts excluding fully amortized intangible assets, consist of the following (in millions):
|  | December 31, 2024
|  | Gross Amount |  | Accumulated Amortization |  | Net Amount
Core and developed technology |  | $ | 7,227.0 |  |  | $ | (4,941.0) |  |  | $ | 2,286.0 |
Customer-related |  | 199.5 |  |  | (149.8) |  |  | 49.7 |
In-process research and development |  | 50.8 |  |  | — |  |  | 50.8 |
Software licenses |  | 254.0 |  |  | (122.3) |  |  | 131.7 |
Total |  | $ | 7,731.3 |  |  | $ | (5,213.1) |  |  | $ | 2,518.2 |
|  | March 31, 2024
|  | Gross Amount |  | Accumulated Amortization |  | Net Amount
Core and developed technology |  | $ | 7,221.3 |  |  | $ | (4,590.9) |  |  | $ | 2,630.4 |
Customer-related |  | 196.7 |  |  | (140.8) |  |  | 55.9 |
Software licenses |  | 230.7 |  |  | (135.2) |  |  | 95.5 |
Total |  | $ | 7,648.7 |  |  | $ | (4,866.9) |  |  | $ | 2,781.8 |
Schedule of Indefinite Lived Intangible Assets | Net amounts excluding fully amortized intangible assets, consist of the following (in millions):
|  | December 31, 2024
|  | Gross Amount |  | Accumulated Amortization |  | Net Amount
Core and developed technology |  | $ | 7,227.0 |  |  | $ | (4,941.0) |  |  | $ | 2,286.0 |
Customer-related |  | 199.5 |  |  | (149.8) |  |  | 49.7 |
In-process research and development |  | 50.8 |  |  | — |  |  | 50.8 |
Software licenses |  | 254.0 |  |  | (122.3) |  |  | 131.7 |
Total |  | $ | 7,731.3 |  |  | $ | (5,213.1) |  |  | $ | 2,518.2 |
|  | March 31, 2024
|  | Gross Amount |  | Accumulated Amortization |  | Net Amount
Core and developed technology |  | $ | 7,221.3 |  |  | $ | (4,590.9) |  |  | $ | 2,630.4 |
Customer-related |  | 196.7 |  |  | (140.8) |  |  | 55.9 |
Software licenses |  | 230.7 |  |  | (135.2) |  |  | 95.5 |
Total |  | $ | 7,648.7 |  |  | $ | (4,866.9) |  |  | $ | 2,781.8 |
Schedule of Projected Amortization Expense | The following is an expected amortization schedule for the intangible assets for the remainder of fiscal 2025 through fiscal 2029, absent any future acquisitions or impairment charges (in millions):
Fiscal Year Ending March 31, |  | Amortization Expense
2025 |  | $ | 145.8 |
2026 |  | $ | 519.0 |
2027 |  | $ | 423.7 |
2028 |  | $ | 314.3 |
2029 |  | $ | 240.6 |
Schedule of Amortization Expense by Intangible Asset Class | Amortization expense attributed to intangible assets are assigned to cost of sales and operating expenses as follows (in millions):
|  |  | Three Months Ended December 31, |  | Nine Months Ended December 31,
|  |  |  |  |  |  | 2024 |  | 2023 |  | 2024 |  | 2023
Amortization expense charged to cost of sales |  |  |  |  |  |  | $ | 6.1 |  |  | $ | 3.0 |  |  | $ | 13.7 |  |  | $ | 9.0 |
Amortization expense charged to operating expense |  |  |  |  |  |  | 140.3 |  |  | 169.3 |  |  | 424.8 |  |  | 507.7 |
Total amortization expense |  |  |  |  |  |  | $ | 146.4 |  |  | $ | 172.3 |  |  | $ | 438.5 |  |  | $ | 516.7 |
Schedule of Goodwill Activity | Goodwill activity by segment was as follows (in millions):
| Semiconductor Products Reporting Unit |  | Technology Licensing Reporting Unit
Balance at March 31, 2024 | $ | 6,656.2 |  |  | $ | 19.2 |
Additions due to acquisitions | 9.4 |  |  | — |
Balance at December 31, 2024 | $ | 6,665.6 |  |  | $ | 19.2 |
At March 31, 2024, the Company applied a qualitative goodwill impairment test to its two reporting units, and concluded that goodwill was not impaired. Through December 31, 2024, the Company has never recorded a goodwill impairment charge.

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