Summary of Significant Accounting Policies (Details) (USD $) In Millions, except Per Share data	3 Months Ended	6 Months Ended
Sep. 10, 2011	Sep. 11, 2010	Sep. 10, 2011	Sep. 11, 2010	Feb. 26, 2011
Net earnings (loss) per share - basic
Net earnings (loss) available to common stockholders	$ 60	$ (1,470)	$ 134	$ (1,403)
Weighted average shares outstanding - basic	212	212	212	212
Net earnings (loss) per share - basic	$ 0.28	$ (6.94)	$ 0.63	$ (6.63)
Net earnings (loss) per share - diluted
Net earnings (loss) available to common stockholders	60	(1,470)	134	(1,403)
Weighted average shares outstanding - basic	212	212	212	212
Dilutive impact of options and restricted stock outstanding	1		1
Weighted average shares outstanding - diluted	213	212	213	212
Net earnings (loss) per share - diluted	$ 0.28	$ (6.94)	$ 0.63	$ (6.63)
Comprehensive Income (Loss)
Net earnings (loss)	60	(1,470)	134	(1,403)
Pension and other postretirement activity, net of tax	36	9	53	20
Comprehensive income	96	(1,461)	187	(1,383)
Summary of Significant Accounting Policies (Textual) [Abstract]
Net book overdrafts	$ 309		$ 309		$ 360
Options to purchase common stock excluded from the computation of diluted earnings per share	20	24	21	23
Number of weeks in first quarter			P16W
Number of weeks in second, third and fourth quarter			P12W

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Summary of significant accounting policies.

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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Carrying value as of the balance sheet date of payments made in excess of existing cash balances, which will be honored by the bank but reflected as a loan to the entity. Overdrafts generally have a very short time frame for correction or repayment and are therefore more similar to short-term bank financing than trade financing.

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Namespace Prefix:	us-gaap
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 260

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 260

-SubTopic 10

-Section 45

-Paragraph 10

-URI http://asc.fasb.org/extlink&oid=6920599&loc=d3e1448-109256

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 128

-Paragraph 171

-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 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Weighted-Average Number of Common Shares Outstanding

-URI http://asc.fasb.org/extlink&oid=6528421

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 128

-Paragraph 40

-Subparagraph a

-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 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 128

-Paragraph 8

-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 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Emerging Issues Task Force (EITF)

-Number 07-4

-Paragraph 4

-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.

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Namespace Prefix:	us-gaap
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration