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Stockholders' Equity - Summary of Activities Related to Dividends on Common Stock (Detail) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended
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Jul. 31, 2020 | Jul. 26, 2019
Dividends, Common Stock [Abstract] |  |
Dividends per share declared | $ 0.48 | $ 0.48
Dividend payments | $ 107 | $ 115
Additional Paid-in Capital |  |
Dividends, Common Stock [Abstract] |  |
Dividend payments | 30 | 115
Retained Earnings |  |
Dividends, Common Stock [Abstract] |  |
Dividend payments | $ 77 | $ 0

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- Definition Aggregate dividends declared during the period for each share of common stock outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -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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- Definition Cash outflow in the form of capital distributions and dividends to common shareholders, preferred shareholders and noncontrolling interests. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3291-108585 + Details
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