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Derivatives and Foreign Exchange Risk Management - Location and Fair Value Amounts of Derivative Instruments in Balance Sheets (Details) - USD ($) $ in Millions	Jan. 29, 2016	Apr. 24, 2015
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	$ 496	$ 733
Liability Derivatives, Fair Value	91	116
Interest rate contracts [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	88	89
Liability Derivatives, Fair Value	41	71
Foreign currency exchange rate contracts [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	387	644
Liability Derivatives, Fair Value	40	45
Commodity derivatives [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives, Fair Value	5
Cross currency interest rate contracts [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	21
Liability Derivatives, Fair Value	5
Designated as hedging instrument [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	454	614
Liability Derivatives, Fair Value	62	86
Designated as hedging instrument [Member] | Interest rate contracts [Member] | Prepaid expenses and other current assets [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	1	10
Designated as hedging instrument [Member] | Interest rate contracts [Member] | Other assets [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	87	79
Designated as hedging instrument [Member] | Interest rate contracts [Member] | Other accrued expenses [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives, Fair Value	0	0
Designated as hedging instrument [Member] | Interest rate contracts [Member] | Other long-term liabilities [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives, Fair Value	41	71
Designated as hedging instrument [Member] | Foreign currency exchange rate contracts [Member] | Prepaid expenses and other current assets [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	281	382
Designated as hedging instrument [Member] | Foreign currency exchange rate contracts [Member] | Other assets [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	85	143
Designated as hedging instrument [Member] | Foreign currency exchange rate contracts [Member] | Other accrued expenses [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives, Fair Value	13	12
Designated as hedging instrument [Member] | Foreign currency exchange rate contracts [Member] | Other long-term liabilities [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives, Fair Value	8	3
Not designated as hedging instrument [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	42	119
Liability Derivatives, Fair Value	29	30
Not designated as hedging instrument [Member] | Foreign currency exchange rate contracts [Member] | Prepaid expenses and other current assets [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	21	119
Not designated as hedging instrument [Member] | Foreign currency exchange rate contracts [Member] | Other accrued expenses [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives, Fair Value	19	$ 30
Not designated as hedging instrument [Member] | Commodity derivatives [Member] | Prepaid expenses and other current assets [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	0
Not designated as hedging instrument [Member] | Commodity derivatives [Member] | Other accrued expenses [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives, Fair Value	5
Not designated as hedging instrument [Member] | Cross currency interest rate contracts [Member] | Other assets [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	21
Not designated as hedging instrument [Member] | Cross currency interest rate contracts [Member] | Other long-term liabilities [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives, Fair Value	$ 5

X

- Definition

Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
-Subparagraph (a),(c)
-URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624163-113959

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=51825145&loc=SL20226000-175313

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 20
-Section 50
-Paragraph 4D
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=51814546&loc=SL51823488-111719

+ Details

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Balance Type:	debit
Period Type:	instant

X

- Definition

Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 20
-Section 50
-Paragraph 4D
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=51814546&loc=SL51823488-111719

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
-Subparagraph (a),(c)
-URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624163-113959

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=51825145&loc=SL20226000-175313

+ 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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