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Financing Arrangements - Carrying Value of Long-Term Debt (Detail) - USD ($) $ in Millions | Apr. 29, 2016 | Apr. 24, 2015
--- | --- | ---
Debt Instrument [Line Items] |  |
Total long-term debt | $ 1,490 | $ 1,487
Senior Notes |  |
Debt Instrument [Line Items] |  |
Total principal amount | 1,500 | 1,500
Less: Unamortized discount | (4) | (5)
Unamortized issuance costs | (6) | (8)
Senior Notes | Due 2017 |  |
Debt Instrument [Line Items] |  |
Total principal amount | $ 750 | $ 750
Debt Instrument, Effective Interest Rate | 2.25% | 2.25%
Senior Notes | Due 2021 |  |
Debt Instrument [Line Items] |  |
Total principal amount | $ 500 | $ 500
Debt Instrument, Effective Interest Rate | 3.54% | 3.54%
Senior Notes | Due 2022 |  |
Debt Instrument [Line Items] |  |
Total principal amount | $ 250 | $ 250
Debt Instrument, Effective Interest Rate | 3.43% | 3.43%

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- Definition Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 + Details
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- Definition Carrying amount of long-term debt, net of unamortized discount or premium, excluding amounts to be repaid within one year or the normal operating cycle, if longer (current maturities). Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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