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Financing Arrangements - Carrying Value of Long-Term Debt (Detail) - USD ($) $ in Millions | Oct. 25, 2019 | Apr. 26, 2019
--- | --- | ---
Debt Instrument [Line Items] |  |
Total senior notes | $ 1,145 | $ 1,544
Less: Current portion of long-term debt | 0 | (400)
Total long-term debt | 1,145 | 1,144
Senior Notes |  |
Debt Instrument [Line Items] |  |
Total principal amount | 1,150 | 1,550
Unamortized discount and issuance costs | (5) | (6)
Senior Notes | Due September 2019 |  |
Debt Instrument [Line Items] |  |
Total principal amount | 0 | $ 400
Debt Instrument, Effective Interest Rate |  | 2.32%
Senior Notes | Due June 2021 |  |
Debt Instrument [Line Items] |  |
Total principal amount | $ 500 | $ 500
Debt Instrument, Effective Interest Rate | 3.54% | 3.54%
Senior Notes | Due December 2022 |  |
Debt Instrument [Line Items] |  |
Total principal amount | $ 250 | $ 250
Debt Instrument, Effective Interest Rate | 3.43% | 3.43%
Senior Notes | Due September 2024 |  |
Debt Instrument [Line Items] |  |
Total principal amount | $ 400 | $ 400
Debt Instrument, Effective Interest Rate | 3.42% | 3.42%

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