Benefit Plans (Details 1) (USD $) In Millions, unless otherwise specified	Feb. 25, 2012	Feb. 26, 2011
Pension Benefits [Member]
Amounts recognized in the Consolidated Balance Sheets
Accrued vacation, compensation and benefits	$ (2)	$ (3)
Pension and other postretirement benefit obligations	(1,017)	(616)
Total	(1,019)	(619)
Other Postretirement Benefits [Member]
Amounts recognized in the Consolidated Balance Sheets
Accrued vacation, compensation and benefits	(7)	(8)
Pension and other postretirement benefit obligations	(109)	(140)
Total	$ (116)	$ (148)

The aggregate net amount recognized in the balance sheet associated with the defined benefit plan(s). Will normally be the same as the Defined Benefit Plan, Funded Status of Plan, Total.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5

-Subparagraph c

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6410544&loc=d3e1703-114919

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e1928-114920

Name:	us-gaap_DefinedBenefitPlanAmountsRecognizedInBalanceSheet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant