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Goodwill and Purchased Intangible Assets, Net (Tables) | 12 Months Ended
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Apr. 24, 2020
Goodwill And Intangible Assets Disclosure [Abstract] |
Schedule of Goodwill Activity | Goodwill activity is summarized as follows (in millions):
Balance as of April 27, 2018 |  | $ | 1,739 |
Additions |  |  | 3 |
Derecognition |  |  | (7 | )
Balance as of April 26, 2019 |  |  | 1,735 |
Additions |  |  | 43 |
Balance as of April 24, 2020 |  | $ | 1,778 |
Purchased Intangible Assets, Net | Purchased intangible assets, net are summarized below (in millions):
|  | April 24, 2020 |  |  | April 26, 2019 |
|  | Gross |  |  | Accumulated |  |  | Net |  |  | Gross |  |  | Accumulated |  |  | Net |
|  | Assets |  |  | Amortization |  |  | Assets |  |  | Assets |  |  | Amortization |  |  | Assets |
Developed technology |  | $ | 192 |  |  | $ | (152 | ) |  | $ | 40 |  |  | $ | 160 |  |  | $ | (113 | ) |  | $ | 47 |
Customer contracts/relationships |  |  | 4 |  |  |  | — |  |  |  | 4 |  |  |  | 41 |  |  |  | (41 | ) |  |  | — |
Total purchased intangible assets |  | $ | 196 |  |  | $ | (152 | ) |  | $ | 44 |  |  | $ | 201 |  |  | $ | (154 | ) |  | $ | 47 |
Amortization Expense for Purchased Intangible Assets | Amortization expense for purchased intangible assets is summarized below (in millions):
|  | Year Ended |  |  | Statement of
|  | April 24, 2020 |  |  | April 26, 2019 |  |  | April 27, 2018 |  |  | Operations Classifications
Developed technology |  | $ | 39 |  |  | $ | 36 |  |  | $ | 36 |  |  | Cost of revenues
Customer contracts/relationships |  |  | — |  |  |  | 10 |  |  |  | 14 |  |  | Operating expenses
Other purchased intangibles |  |  | — |  |  |  | — |  |  |  | 3 |  |  | Operating expenses
Total |  | $ | 39 |  |  | $ | 46 |  |  | $ | 53 |  |  |
Future Amortization Expense Related to Purchased Intangible Assets | As of April 24, 2020, future amortization expense related to purchased intangible assets is as follows (in millions):
Fiscal Year |  | Amount
2021 |  | 28
2022 |  | 12
Thereafter |  | 4
Total |  | 44

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