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Pension And Postretirement Benefits Pension And Postretirement Benefits (Schedule Of Pension Plans With Accumulated Benefit Obligations In Excess Of Plan Assets) (Details) (USD $) In Millions, unless otherwise specified	Jul. 29, 2012	Jul. 31, 2011
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	$ 2,739	$ 2,194
Accumulated benefit obligation	2,653	2,131
Fair value of plan assets	$ 2,114	$ 1,891

If aggregate disclosures are presented, the aggregate pension accumulated benefit obligation for pension plans with accumulated benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented.

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- Definition

If aggregate disclosures are presented, the aggregate fair value of plan assets for pension plans with accumulated benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented.

+ References+ Details

- Definition

If aggregate disclosures are presented, the aggregate projected benefit obligation for pension plans with accumulated benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented.

+ References+ Details