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Restructuring and Other Charges - Activities Related to Restructuring Reserves (Detail) - USD ($) $ in Millions | 12 Months Ended
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Apr. 29, 2016 | Apr. 24, 2015 | Apr. 25, 2014
Restructuring Cost and Reserve [Line Items] |  |  |
Balance at beginning of period | $ 0 | $ 27 | $ 0
Net charges | 108 | 0 | 88
Cash payments | (63) | (27) | (61)
Balance at end of period | 45 | 0 | 27
March 2016 Restructuring |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Balance at beginning of period | 0 | 0 | 0
Net charges | 80 | 0 | 0
Cash payments | (35) | 0 | 0
Balance at end of period | 45 | 0 | 0
May 2015 Restructuring |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Balance at beginning of period | 0 | 0 | 0
Net charges | 28 | 0 | 0
Cash payments | (28) | 0 | 0
Balance at end of period | 0 | 0 | 0
March 2014 Restructuring |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Balance at beginning of period | 0 | 27 | 0
Net charges | 0 | 0 | 39
Cash payments | 0 | (27) | (12)
Balance at end of period | 0 | 0 | 27
May 2013 Restructuring |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Balance at beginning of period | 0 | 0 | 0
Net charges | 0 | 0 | 49
Cash payments | 0 | 0 | (49)
Balance at end of period | $ 0 | $ 0 | $ 0

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- Definition Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 + Details
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- Definition Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.P.3) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140864-122747 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section P -Subsection 3, 4 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section P -Subsection 3, 4 + Details
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