Schedule II (Details) - USD ($) $ in Millions	12 Months Ended
Apr. 28, 2017	Apr. 29, 2016	Apr. 24, 2015
Allowance for Doubtful Accounts [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Fiscal Year	$ 161	$ 144	$ 115
Charges to Income	39	49	35
Charges to Other Accounts	0	0	34
Uncollectible accounts written off, less recoveries	(46)	(28)	(36)
Effects of currency fluctuations	1	(4)	(4)
Balance at End of Fiscal Year	155	161	144
Deferred Tax Valuation Allowance [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Fiscal Year	7,032	5,607	397
Charges to Income	101	1,194	40
Charges to Other Accounts	6	4	5,660
Uncollectible accounts written off, less recoveries	(524)	(88)	(56)
Effects of currency fluctuations	(304)	315	(434)
Balance at End of Fiscal Year	$ 6,311	$ 7,032	$ 5,607

Valuation and Allowance Reserves, Effects of Foreign Currency

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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- Definition

Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 4
-Subparagraph (SX 210.12-09)
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690

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- Definition

Amount of increase in the allowances and reserves, which consist of the valuation and qualifying accounts that are either netted against the cost of an asset or that reflect a liability established to represent expected future costs, from charges to costs and expenses.

+ References

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- Definition

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- Definition

Total of the deductions in a given period to allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs, representing receivables written off as uncollectible and portions of the reserves utilized, respectively.

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