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Purchased Intangible Assets, Net | 6 Months Ended
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Oct. 30, 2015
Goodwill And Intangible Assets Disclosure [Abstract] |
Purchased Intangible Assets, Net | 4. Purchased Intangible Assets, Net Purchased intangible assets, net are summarized below (in millions):
|  | October 30, 2015 |  |  | April 24, 2015 |
|  | Gross |  |  | Accumulated |  |  | Net |  |  | Gross |  |  | Accumulated |  |  | Net |
|  | Assets |  |  | Amortization |  |  | Assets |  |  | Assets |  |  | Amortization |  |  | Assets |
Developed technology |  | $ | 304 |  |  | $ | (255 | ) |  | $ | 49 |  |  | $ | 313 |  |  | $ | (225 | ) |  | $ | 88 |
Customer contracts/relationships |  |  | 5 |  |  |  | (3 | ) |  |  | 2 |  |  |  | 5 |  |  |  | (3 | ) |  |  | 2 |
Other purchased intangibles |  |  | 1 |  |  |  | (1 | ) |  |  | — |  |  |  | 3 |  |  |  | (3 | ) |  |  | — |
Total purchased intangible assets |  | $ | 310 |  |  | $ | (259 | ) |  | $ | 51 |  |  | $ | 321 |  |  | $ | (231 | ) |  | $ | 90 |
During the six months ended October 30, 2015, we recorded a charge of $11 million to fully impair developed technology related to our fiscal 2013 acquisition of CacheIQ as a result of our discontinued use of such technology. The impairment charge is included in accumulated amortization in the table above. Amortization expense for purchased intangible assets is summarized below (in millions):
|  | Three Months Ended |  |  | Six Months Ended |  |  | Statement of
|  | October 30, 2015 |  |  | October 24, 2014 |  |  | October 30, 2015 |  |  | October 24, 2014 |  |  | Operations Classifications
Developed technology |  | $ | 14 |  |  | $ | 14 |  |  | $ | 28 |  |  | $ | 29 |  |  | Cost of revenues
Customer contracts/relationships |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  | Operating expenses
Total |  | $ | 14 |  |  | $ | 14 |  |  | $ | 28 |  |  | $ | 29 |  |  |
As of October 30, 2015, future amortization expense related to purchased intangible assets is as follows (in millions):
Fiscal Year |  | Amount |
Remainder of 2016 |  | $ | 27 |
2017 |  |  | 10 |
2018 |  |  | 6 |
2019 |  |  | 5 |
2020 |  |  | 3 |
Total |  | $ | 51 |

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- Definition The entire disclosure for all or part of the information related to intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16373-109275 + Details
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