Restructuring And Other Charges (Schedule Of Activities Related To Restructuring And Other Charges) (Detail) (August Fiscal 2014 Restructuring Plan, USD $) In Millions, unless otherwise specified	6 Months Ended
Jan. 25, 2014
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 310
Cash Payments	(270)
Non-Cash Items	4
Restructuring Reserve	44
Employee Severance
Restructuring Cost and Reserve [Line Items]
Severance Costs	314
Cash Payments	(270)
Non-Cash Items	0
Restructuring Reserve	44
Restructuring And Other Charges [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Accrual Adjustment	(4)
Cash Payments	0
Non-Cash Items	4
Restructuring Reserve	$ 0

Amount of other expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses associated with a discontinued operation or an asset retirement obligation.

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

-Publisher FASB

-Name Accounting Standards Codification

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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.

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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.

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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.

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Amount of consideration other than cash used to fully or partially settle an accrued restructuring cost.

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Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.

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