Summary of Significant Accounting Policies - Changes in Company's Self-Insurance Liabilities (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
Feb. 23, 2013	Feb. 25, 2012	Feb. 26, 2011
Statement Of Financial Position [Abstract]
Beginning balance	$ 81	$ 83	$ 77
Expense	29	23	32
Claim payments	(27)	(25)	(26)
Ending balance	83	81	83
Less current portion	(27)	(26)	(27)
Long-term portion	$ 56	$ 55	$ 56

Carrying amount (including both current and noncurrent portions) of accrued known and estimated losses incurred as of the balance sheet date for which no insurance coverage exists, and for which a claim has been made or is probable of being asserted, typically arising from workmen's compensation-type of incidents and personal injury to nonemployees from accidents on the entity's property.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.24)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Name:	us-gaap_SelfInsuranceReserve
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant