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Intangible Assets and Goodwill (Tables) | 9 Months Ended
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Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Intangible Assets, Indefinite-Lived | Intangible assets consist of the following (in millions):
|  | December 31, 2021
|  | Gross Amount |  | Accumulated Amortization |  | Net Amount
Core and developed technology |  | $ | 7,387.6 |  |  | $ | (3,374.4) |  |  | $ | 4,013.2 |
Customer-related |  | 835.2 |  |  | (736.2) |  |  | 99.0 |
In-process research and development |  | 6.4 |  |  | — |  |  | 6.4 |
Distribution rights and other |  | 193.6 |  |  | (55.9) |  |  | 137.7 |
Total |  | $ | 8,422.8 |  |  | $ | (4,166.5) |  |  | $ | 4,256.3 |
|  | March 31, 2021
|  | Gross Amount |  | Accumulated Amortization |  | Net Amount
Core and developed technology |  | $ | 7,371.3 |  |  | $ | (2,771.0) |  |  | $ | 4,600.3 |
Customer-related |  | 835.2 |  |  | (702.6) |  |  | 132.6 |
In-process research and development |  | 7.7 |  |  | — |  |  | 7.7 |
Distribution rights and other |  | 130.2 |  |  | (76.0) |  |  | 54.2 |
Total |  | $ | 8,344.4 |  |  | $ | (3,549.6) |  |  | $ | 4,794.8 |
Schedule of Intangible Assets, Finite-Lived | Intangible assets consist of the following (in millions):
|  | December 31, 2021
|  | Gross Amount |  | Accumulated Amortization |  | Net Amount
Core and developed technology |  | $ | 7,387.6 |  |  | $ | (3,374.4) |  |  | $ | 4,013.2 |
Customer-related |  | 835.2 |  |  | (736.2) |  |  | 99.0 |
In-process research and development |  | 6.4 |  |  | — |  |  | 6.4 |
Distribution rights and other |  | 193.6 |  |  | (55.9) |  |  | 137.7 |
Total |  | $ | 8,422.8 |  |  | $ | (4,166.5) |  |  | $ | 4,256.3 |
|  | March 31, 2021
|  | Gross Amount |  | Accumulated Amortization |  | Net Amount
Core and developed technology |  | $ | 7,371.3 |  |  | $ | (2,771.0) |  |  | $ | 4,600.3 |
Customer-related |  | 835.2 |  |  | (702.6) |  |  | 132.6 |
In-process research and development |  | 7.7 |  |  | — |  |  | 7.7 |
Distribution rights and other |  | 130.2 |  |  | (76.0) |  |  | 54.2 |
Total |  | $ | 8,344.4 |  |  | $ | (3,549.6) |  |  | $ | 4,794.8 |
Schedule of Projected Amortization Expense | The following is an expected amortization schedule for the intangible assets for the remainder of fiscal 2022 through fiscal 2026, absent any future acquisitions or impairment charges (in millions):
Fiscal Year Ending March 31, |  | Projected Amortization Expense
2022 |  | $ | 233.1 |
2023 |  | $ | 743.2 |
2024 |  | $ | 666.0 |
2025 |  | $ | 531.0 |
2026 |  | $ | 459.8 |
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,
|  |  |  |  |  |  | 2021 |  | 2020 |  | 2021 |  | 2020
Amortization expense charged to cost of sales |  |  |  |  |  |  | $ | 3.2 |  |  | $ | 2.4 |  |  | $ | 9.1 |  |  | $ | 6.9 |
Amortization expense charged to operating expense |  |  |  |  |  |  | 232.5 |  |  | 244.2 |  |  | 691.4 |  |  | 738.2 |
Total amortization expense |  |  |  |  |  |  | $ | 235.7 |  |  | $ | 246.6 |  |  | $ | 700.5 |  |  | $ | 745.1 |
Schedule of Goodwill Activity | Goodwill activity for the nine months ended December 31, 2021 by segment was as follows (in millions):
| Semiconductor Products Reporting Unit |  | Technology Licensing Reporting Unit
Balance at March 31, 2021 | $ | 6,651.4 |  |  | $ | 19.2 |
Additions | 3.0 |  |  | — |
Balance at December 31, 2021 | $ | 6,654.4 |  |  | $ | 19.2 |

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