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Financial Instruments and Fair Value Measurements (Tables) | 9 Months Ended
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Jan. 29, 2016
Investments Debt And Equity Securities [Abstract] |
Summary of Investments | The following is a summary of our investments (in millions):
|  | January 29, 2016 |  |  | April 24, 2015 |
|  | Cost or |  |  |  |  |  | Estimated |  |  | Cost or |  |  |  |  |  | Estimated |
|  | Amortized |  |  | Gross Unrealized |  |  | Fair |  |  | Amortized |  |  | Gross Unrealized |  |  | Fair |
|  | Cost |  |  | Gains |  |  | Losses |  |  | Value |  |  | Cost |  |  | Gains |  |  | Losses |  |  | Value |
Corporate bonds |  | $ | 1,496 |  |  | $ | 2 |  |  | $ | (4 | ) |  | $ | 1,494 |  |  | $ | 2,249 |  |  | $ | 9 |  |  | $ | — |  |  | $ | 2,258 |
U.S. Treasury and government debt securities |  |  | 1,019 |  |  |  | 1 |  |  |  | — |  |  |  | 1,020 |  |  |  | 1,056 |  |  |  | 2 |  |  |  | — |  |  |  | 1,058 |
Foreign government debt securities |  |  | 39 |  |  |  | — |  |  |  | — |  |  |  | 39 |  |  |  | 38 |  |  |  | — |  |  |  | — |  |  |  | 38 |
Commercial paper |  |  | 7 |  |  |  | — |  |  |  | — |  |  |  | 7 |  |  |  | 20 |  |  |  | — |  |  |  | — |  |  |  | 20 |
Certificates of deposit |  |  | 116 |  |  |  | — |  |  |  | — |  |  |  | 116 |  |  |  | 286 |  |  |  | — |  |  |  | — |  |  |  | 286 |
Mutual funds |  |  | 29 |  |  |  | — |  |  |  | — |  |  |  | 29 |  |  |  | 32 |  |  |  | — |  |  |  | — |  |  |  | 32 |
Total debt and equity securities |  | $ | 2,706 |  |  | $ | 3 |  |  | $ | (4 | ) |  | $ | 2,705 |  |  | $ | 3,681 |  |  | $ | 11 |  |  | $ | — |  |  | $ | 3,692 |
Contractual Maturities of Debt Investments | The following table presents the contractual maturities of our debt investments as of January 29, 2016 (in millions):
|  | Amortized Cost |  |  | Fair Value |
Due in one year or less |  | $ | 839 |  |  | $ | 839 |
Due after one year through five years |  |  | 1,838 |  |  |  | 1,837 |
|  | $ | 2,677 |  |  | $ | 2,676 |
Summary of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis | The following table summarizes our financial assets and liabilities measured at fair value on a recurring basis (in millions):
|  | January 29, 2016 |
|  |  |  |  |  | Fair Value Measurements at Reporting Date Using |
|  | Total |  |  | Level 1 |  |  | Level 2 |
Cash |  | $ | 2,347 |  |  | $ | 2,347 |  |  | $ | — |
Corporate bonds |  |  | 1,494 |  |  |  | — |  |  |  | 1,494 |
U.S. Treasury and government debt securities |  |  | 1,020 |  |  |  | 325 |  |  |  | 695 |
Foreign government debt securities |  |  | 39 |  |  |  | — |  |  |  | 39 |
Commercial paper |  |  | 7 |  |  |  | — |  |  |  | 7 |
Certificates of deposit |  |  | 116 |  |  |  | — |  |  |  | 116 |
Total cash, cash equivalents and short-term investments |  | $ | 5,023 |  |  | $ | 2,672 |  |  | $ | 2,351 |
Other items: |  |  |  |  |  |  |  |  |  |  |  |
Mutual funds (1) |  | $ | 5 |  |  | $ | 5 |  |  | $ | — |
Mutual funds (2) |  | $ | 24 |  |  | $ | 24 |  |  | $ | — |
Foreign currency exchange contracts assets (1) |  | $ | 5 |  |  | $ | — |  |  | $ | 5 |
Foreign currency exchange contracts liabilities (3) |  | $ | (1 | ) |  | $ | — |  |  | $ | (1 | )
Long-term debt |  | $ | (1,492 | ) |  | $ | — |  |  | $ | (1,492 | )
(1) | Reported as other current assets in the condensed consolidated balance sheets
(2) | Reported as other non-current assets in the condensed consolidated balance sheets
(3) | Reported as accrued expenses in the condensed consolidated balance sheets

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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19190-110258 + Details
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