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Intangible Assets and Goodwill | 9 Months Ended
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Dec. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract] |
Intangible Assets and Goodwill | Intangible Assets and Goodwill Net amounts excluding fully amortized intangible assets, consist of the following (in millions):
|  | December 31, 2023
|  | Gross Amount |  | Accumulated Amortization |  | Net Amount
Core and developed technology |  | $ | 7,295.0 |  |  | $ | (4,517.8) |  |  | $ | 2,777.2 |
Customer-related |  | 196.7 |  |  | (136.8) |  |  | 59.9 |
Software licenses |  | 223.2 |  |  | (123.8) |  |  | 99.4 |
Total |  | $ | 7,714.9 |  |  | $ | (4,778.4) |  |  | $ | 2,936.5 |
|  | March 31, 2023
|  | Gross Amount |  | Accumulated Amortization |  | Net Amount
Core and developed technology |  | $ | 7,296.2 |  |  | $ | (4,103.4) |  |  | $ | 3,192.8 |
Customer-related |  | 199.8 |  |  | (128.0) |  |  | 71.8 |
In-process research and development |  | 5.7 |  |  | — |  |  | 5.7 |
Software licenses |  | 211.7 |  |  | (113.0) |  |  | 98.7 |
Distribution rights and other |  | 0.3 |  |  | (0.3) |  |  | — |
Total |  | $ | 7,713.7 |  |  | $ | (4,344.7) |  |  | $ | 3,369.0 |
The following is an expected amortization schedule for the intangible assets for the remainder of fiscal 2024 through fiscal 2028, absent any future acquisitions or impairment charges (in millions):
Fiscal Year Ending March 31, |  | Amortization Expense
2024 |  | $ | 173.0 |
2025 |  | $ | 557.3 |
2026 |  | $ | 486.6 |
2027 |  | $ | 385.7 |
2028 |  | $ | 300.3 |
The Company amortizes intangible assets over their expected useful lives, which range between 1 and 15 years. 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,
|  |  |  |  |  |  | 2023 |  | 2022 |  | 2023 |  | 2022
Amortization expense charged to cost of sales |  |  |  |  |  |  | $ | 3.0 |  |  | $ | 4.3 |  |  | $ | 9.0 |  |  | $ | 11.5 |
Amortization expense charged to operating expense |  |  |  |  |  |  | 169.3 |  |  | 184.4 |  |  | 507.7 |  |  | 553.1 |
Total amortization expense |  |  |  |  |  |  | $ | 172.3 |  |  | $ | 188.7 |  |  | $ | 516.7 |  |  | $ | 564.6 |
The Company recognized impairment charges of $0.2 million and $1.3 million in the three and nine months ended December 31, 2023, respectively, compared to $1.4 million in the three and nine months ended December 31, 2022. Goodwill activity by segment was as follows (in millions):
| Semiconductor Products Reporting Unit |  | Technology Licensing Reporting Unit
Balance at March 31, 2023 | $ | 6,654.4 |  |  | $ | 19.2 |
Additions | 1.8 |  |  | — |
Balance at December 31, 2023 | $ | 6,656.2 |  |  | $ | 19.2 |
At March 31, 2023, the Company applied a qualitative goodwill impairment test to its two reporting units, and concluded that goodwill was not impaired. Through December 31, 2023, the Company has never recorded a goodwill impairment charge.

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- Definition The entire disclosure for goodwill and intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 350 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//350/tableOfContent + Details
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