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Pension, Retiree Medical And Savings Plans (Selected Information About Plans With Liability For Service To Date And Total Benefit Liability In Excess Of Plan Assets) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 25, 2010
U.S. [Member]
Defined Benefit Plan Disclosure [Line Items]
Liability for service to date	$ (11,205)	$ (525)
Fair value of plan assets	9,072
Benefit liability	(11,901)	(5,806)
Fair value of plan assets	9,072	4,778
International [Member]
Defined Benefit Plan Disclosure [Line Items]
Liability for service to date	(471)	(610)
Fair value of plan assets	344	474
Benefit liability	(2,191)	(1,949)
Fair value of plan assets	1,786	1,638
Retiree Medical Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Benefit liability	(1,563)	(1,770)
Fair value of plan assets	$ 190	$ 190

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