A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

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This element represents the total of accruals as of the date of the statement of financial position for interest recognized for an underpayment of income taxes computed by applying the applicable statutory rate of interest to the difference between a tax position recognized for financial reporting purposes and the amount previously taken or expected to be taken in a tax return of the entity and the amount of statutory penalties for a tax position claimed or expected to be claimed by the entity, in its tax return, that does not meet the minimum statutory threshold to avoid payment of penalties.

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Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Oct. 25, 2013	Oct. 26, 2012	Oct. 25, 2013	Oct. 26, 2012	Apr. 26, 2013
Income Tax Contingency [Line Items]
Effective tax rate from continuing operations	19.20%	24.40%	18.20%	22.20%
Net benefit associated with foreign dividend distributions, resolution of certain income tax audits, finalization of certain income tax returns, and changes to uncertain tax position reserves	$ 4
Gross unrecognized tax benefits	1,143		1,143		1,068
Accrued income tax interest and penalties	107		107
Unrecognized tax benefits that would impact effective tax rate	1,104		1,104
Current Liaibilities [Member] \| Tax Years 2009 Through 2011 [Member]
Income Tax Contingency [Line Items]
Gross unrecognized tax benefits	$ 51		$ 51