Stock Purchase and Award Plans , Restricted Stock Award Activity (Details) (Restricted Stock Awards, USD $) In Millions, except Share data in Thousands, unless otherwise specified	12 Months Ended
Apr. 25, 2014	Apr. 26, 2013	Apr. 27, 2012
Restricted Stock Awards
Restricted Stock Award Activity (in shares)
Nonvested, beginning balance	10,058	9,980	9,207
Granted	2,519	3,135	3,785
Vested	(2,210)	(2,445)	(2,194)
Forfeited	(809)	(612)	(818)
Nonvested at year-end	9,558	10,058	9,980
Restricted Stock Award Activity (per share)
Nonvested, beginning balance	$ 38.97	$ 37.80	$ 40.42
Granted	$ 55.62	$ 39.53	$ 35.60
Vested	$ 35.76	$ 35.58	$ 44.74
Forfeited	$ 39.41	$ 36.34	$ 38.46
Nonvested at year-end	$ 44.06	$ 38.97	$ 37.80
Unrecognized compensation expense related to restricted stock awards	$ 170
Weighted average period over which unrecognized compensation is expected to be recognized	3 years 4 months 24 days

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (i)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation.

+ References

No definition available.

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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 10

-Section 50

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- Definition

Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

+ References

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-Publisher FASB

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

+ References

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

+ References

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- Definition

The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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