Asset-based lending facility secured.

No definition available.

Name:	svu_AssetBasedLendingFacilitySecured
Namespace Prefix:	svu_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Assets used for collateral.

+ References

No definition available.

+ Details

Name:	svu_AssetsUsedForCollateral
Namespace Prefix:	svu_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Debt Instrument Maturity Term

+ References

No definition available.

+ Details

Name:	svu_DebtInstrumentMaturityTerm
Namespace Prefix:	svu_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Interest rate addition to base rate.

+ References

No definition available.

+ Details

Name:	svu_InterestRateAdditionToBaseRate
Namespace Prefix:	svu_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Invested assets pledged as collateral.

+ References

No definition available.

+ Details

Name:	svu_InvestedAssetsPledgedAsCollateral
Namespace Prefix:	svu_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Letter of credit facility outstanding.

+ References

No definition available.

+ Details

Name:	svu_LetterOfCreditFacilityOutstanding
Namespace Prefix:	svu_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Letter of credit fee.

+ References

No definition available.

+ Details

Name:	svu_LetterOfCreditFee
Namespace Prefix:	svu_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

LIBOR floor rate.

+ References

No definition available.

+ Details

Name:	svu_LiborFloorRate
Namespace Prefix:	svu_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Line of credit facility fee.

+ References

No definition available.

+ Details

Name:	svu_LineOfCreditFacilityFee
Namespace Prefix:	svu_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Line Of Credit Facility Prepayment

+ References

No definition available.

+ Details

Name:	svu_LineOfCreditFacilityPrepayment
Namespace Prefix:	svu_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Long Term Debt Aggregate Principal Amount

+ References

No definition available.

+ Details

Name:	svu_LongTermDebtAggregatePrincipalAmount
Namespace Prefix:	svu_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Maximum period for prepayment of loans outstanding.

+ References

No definition available.

+ Details

Name:	svu_MaximumPeriodForPrepaymentOfLoansOutstanding
Namespace Prefix:	svu_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of aggregate principal amount to prepay outstanding loans.

+ References

No definition available.

+ Details

Name:	svu_PercentageOfAggregatePrincipalAmountToPrepayOutstandingLoans
Namespace Prefix:	svu_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of net cash proceeds to prepay outstanding loans.

+ References

No definition available.

+ Details

Name:	svu_PercentageOfNetCashProceedsToPrepayOutstandingLoans
Namespace Prefix:	svu_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Prime rate plus.

+ References

No definition available.

+ Details

Name:	svu_PrimeRatePlus
Namespace Prefix:	svu_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Senior Notes Containing Operating Covenants Including Limitations on Transactions

+ References

No definition available.

+ Details

Name:	svu_SeniorNotesContainingOperatingCovenantsIncludingLimitationsOnTransactions
Namespace Prefix:	svu_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Term of credit facilities.

+ References

No definition available.

+ Details

Name:	svu_TermOfCreditFacilities
Namespace Prefix:	svu_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or the normal operating cycle, if longer.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 20

-Article 5

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22)

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

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 9

+ Details

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

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

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

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(2))

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

+ Details

Name:	us-gaap_DebtInstrumentMaturityDate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount borrowed under the credit facility as of the balance sheet date.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

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

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

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

- Definition

The carrying value as of the balance sheet date of the current portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

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 210.5-02.20)

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

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 20

-Article 5

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Line-of-Credit Arrangement

-URI http://asc.fasb.org/extlink&oid=6517033

+ Details

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

- Definition

Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(f))

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph f

-Article 4

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 14

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585

+ Details

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Long-Term Debt - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	0 Months Ended	4 Months Ended
	Apr. 17, 2014	Jun. 14, 2014	Jun. 15, 2013	Feb. 22, 2014
Debt Instrument [Line Items]
Line of credit maximum borrowing capacity		$ 1,500
Line of credit facility amount outstanding, current		2		0
Line of credit facility amount outstanding		1,474		1,474
Percentage of net cash proceeds to prepay outstanding loans		100.00%
Maximum period for prepayment of loans outstanding		90 days
Term Loan A [Member]
Debt Instrument [Line Items]
Interest rate at the rate of LIBOR		3.50%
LIBOR floor rate		1.00%
Term Loan A [Member] \| Property, Plant and Equipment [Member]
Debt Instrument [Line Items]
Ground-leased real estate and associated equipment pledged as collateral		684		704
Minimum [Member]
Debt Instrument [Line Items]
Percentage of aggregate principal amount to prepay outstanding loans		0.00%
Maximum [Member]
Debt Instrument [Line Items]
Percentage of aggregate principal amount to prepay outstanding loans		50.00%
Term Loan Credit Facility [Member] \| Term Loan A [Member]
Debt Instrument [Line Items]
Term of credit facility		6 years
2016 Senior Notes [Member]
Debt Instrument [Line Items]
Aggregate principal amount outstanding	250
Debt instrument, interest rate	8.00%	8.00%
Senior Notes contain operating covenants		628
2021 Senior Notes [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate		6.75%
Senior Notes contain operating covenants		400
Revolving ABL Credit Facility [Member]
Debt Instrument [Line Items]
Line of credit facility amount outstanding		0		0
Company's five year asset-based revolving facility		1,000
Maturity date of revolving credit facility	30 days
Aggregate principal amount	500
Letter of credit outstanding		97		101
Facility fees		1.875%		2.125%
Assets collateralized by the ABL Credit Facility		818		786
Maximum letter of credit fee		0.375%		0.375%
Unused credit		1,115		1,066
Revolving ABL credit facility borrowing		870	1,114
Revolving ABL credit facility prepayment		870	1,217
Senior Secured Asset Based Revolving Credit Facility [Member] \| Minimum [Member]
Debt Instrument [Line Items]
LIBOR Plus interest rate	1.50%
Interest rate at the rate of ("Prime plus")	0.50%
Senior Secured Asset Based Revolving Credit Facility [Member] \| Maximum [Member]
Debt Instrument [Line Items]
LIBOR Plus interest rate	2.00%
Interest rate at the rate of ("Prime plus")	1.00%
Asset Backed Revolving Credit Amended Facility [Member]
Debt Instrument [Line Items]
Maturity date of revolving credit facility	90 days
Debt instrument maturity date	Feb. 21, 2019
Aggregate principal amount	$ 250