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Stockholders' Equity - Reconciliation of Retained Earnings (Detail) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Oct. 27, 2017 | Oct. 28, 2016 | Oct. 27, 2017 | Oct. 28, 2016
Retained Earnings Adjustments [Line Items] |  |  |  |
Beginning balance |  |  | $ 40 |
Net income | $ 175 | $ 109 | 311 | $ 173
Repurchases of common stock |  |  | (300) |
Ending balance | $ 17 |  | 17 |
Retained Earnings |  |  |  |
Retained Earnings Adjustments [Line Items] |  |  |  |
Repurchases of common stock |  |  | (226) |
Dividends |  |  | $ (108) |

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- Definition Amount of paid and unpaid common stock dividends declared with the form of settlement in cash. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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