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Intangible Assets and Goodwill (Tables) | 12 Months Ended
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Mar. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract] |
Intangible Assets | Intangible assets consist of the following (in millions):
|  | March 31, 2019
|  | Gross Amount |  | Accumulated Amortization |  | Net Amount
Core and developed technology |  | $ | 7,413.0 |  |  | $ | (1,112.9 | ) |  | $ | 6,300.1 |
Customer-related |  | 917.1 |  |  | (544.0 | ) |  | 373.1 |
In-process research and development |  | 7.7 |  |  | — |  |  | 7.7 |
Distribution rights |  | 0.3 |  |  | (0.2 | ) |  | 0.1 |
Other |  | 7.3 |  |  | (2.7 | ) |  | 4.6 |
Total |  | $ | 8,345.4 |  |  | $ | (1,659.8 | ) |  | $ | 6,685.6 |
|  | March 31, 2018
|  | Gross Amount |  | Accumulated Amortization |  | Net Amount
Core and developed technology |  | $ | 1,952.3 |  |  | $ | (644.4 | ) |  | $ | 1,307.9 |
Customer-related |  | 716.9 |  |  | (375.9 | ) |  | 341.0 |
In-process research and development |  | 12.1 |  |  | — |  |  | 12.1 |
Distribution rights |  | 0.3 |  |  | (0.1 | ) |  | 0.2 |
Other |  | 1.5 |  |  | (0.7 | ) |  | 0.8 |
Total |  | $ | 2,683.1 |  |  | $ | (1,021.1 | ) |  | $ | 1,662.0 |
Projected Amortization Expense | The following is an expected amortization schedule for the intangible assets for fiscal 2020 through fiscal 2024, absent any future acquisitions or impairment charges (in millions):
Fiscal Year Ending March 31, | Projected Amortization Expense
2020 | $1,005.8
2021 | $944.1
2022 | $873.1
2023 | $680.0
2024 | $608.3
Goodwill Activity | Goodwill activity for fiscal 2019 and fiscal 2018 was as follows (in millions):
| Semiconductor Products Reporting Unit |  | Technology Licensing Reporting Unit
Balance at March 31, 2017 and 2018 | $ | 2,279.8 |  |  | $ | 19.2 |
Additions due to the acquisition of Microsemi | 4,364.9 |  |  | — |
Balance at March 31, 2019 | $ | 6,644.7 |  |  | $ | 19.2 |

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