The aggregate amount of write-downs for impairments recognized during the period for long-lived assets held for abandonment, exchange or sale.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 45

-Paragraph 15

-URI http://asc.fasb.org/extlink&oid=8077374&loc=d3e2611-110228

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 144

-Paragraph 27, 28, 29, 30

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

Name:	us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Reserves for Closed Properties and Property, Plant and Equipment-Related Impairment Charges - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended			3 Months Ended		12 Months Ended	3 Months Ended
	Feb. 26, 2011	Feb. 23, 2013 Store	Feb. 25, 2012	Feb. 26, 2011	Dec. 01, 2012 Save-A-Lot [Member]	Sep. 08, 2012 Save-A-Lot [Member] Store	Feb. 23, 2013 Save-A-Lot [Member] Store	Feb. 23, 2013 Retail Food [Member]	Sep. 08, 2012 Retail Food [Member]
Significant Activity In Property Plant And Equipment [Line Items]
Number of non-strategic stores closed		22				22	22
Impairment charge					$ 10	$ 16
Impairment of long-lived assets related to store closures, abandonment of software under development							16	191	13
Property, plant and equipment-related impairment charges	$ 7		$ 3	$ 11