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Goodwill and Purchased Intangible Assets, Net (Tables) | 6 Months Ended
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Oct. 27, 2017
Goodwill And Intangible Assets Disclosure [Abstract] |
Schedule of Goodwill Activity | Goodwill activity is summarized as follows (in millions):
Balance as of April 28, 2017 |  | $ | 1,684 |
Additions |  |  | 55 |
Balance as of October 27, 2017 |  | $ | 1,739 |
Purchased Intangible Assets, Net | Purchased intangible assets, net are summarized below (in millions):
|  | October 27, 2017 |  |  | April 28, 2017 |
|  | Gross |  |  | Accumulated |  |  | Net |  |  | Gross |  |  | Accumulated |  |  | Net |
|  | Assets |  |  | Amortization |  |  | Assets |  |  | Assets |  |  | Amortization |  |  | Assets |
Developed technology |  | $ | 164 |  |  | $ | (61 | ) |  | $ | 103 |  |  | $ | 148 |  |  | $ | (44 | ) |  | $ | 104 |
Customer contracts/relationships |  |  | 43 |  |  |  | (27 | ) |  |  | 16 |  |  |  | 43 |  |  |  | (19 | ) |  |  | 24 |
Other purchased intangibles |  |  | 9 |  |  |  | (8 | ) |  |  | 1 |  |  |  | 9 |  |  |  | (6 | ) |  |  | 3 |
Total purchased intangible assets |  | $ | 216 |  |  | $ | (96 | ) |  | $ | 120 |  |  | $ | 200 |  |  | $ | (69 | ) |  | $ | 131 |
Amortization Expense for Purchased Intangible Assets | Amortization expense for purchased intangible assets is summarized below (in millions):
|  | Three Months Ended |  |  | Six Months Ended |  |  | Statements of
|  | October 27, 2017 |  |  | October 28, 2016 |  |  | October 27, 2017 |  |  | October 28, 2016 |  |  | Operations Classification
Developed technology |  | $ | 9 |  |  | $ | 7 |  |  | $ | 17 |  |  | $ | 13 |  |  | Cost of revenues
Customer contracts/relationships |  |  | 4 |  |  |  | 3 |  |  |  | 8 |  |  |  | 7 |  |  | Operating expenses
Other purchased intangibles |  |  | 1 |  |  |  | 1 |  |  |  | 2 |  |  |  | 2 |  |  | Operating expenses
Total |  | $ | 14 |  |  | $ | 11 |  |  | $ | 27 |  |  | $ | 22 |  |  |
Future Amortization Expense Related to Purchased Intangible Assets | As of October 27, 2017, future amortization expense related to purchased intangible assets is as follows (in millions):
Fiscal Year |  | Amount |
Remainder of 2018 |  | $ | 26 |
2019 |  |  | 47 |
2020 |  |  | 31 |
2021 |  |  | 16 |
Total |  | $ | 120 |

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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