COMPANY- SPONSORED BENEFIT PLANS (Details 6) (USD $) In Millions, unless otherwise specified	12 Months Ended
Feb. 02, 2013	Jan. 28, 2012	Jan. 29, 2011
Roll-Forwards of assets measured at fair value using Level 3 inputs
Contribution to employee 401(k) retirement savings accounts	$ 140	$ 130	$ 119
Cost of other defined contribution plans	7	6	7
Significant Unobservable Inputs (Level 3)
Roll-Forwards of assets measured at fair value using Level 3 inputs
Fair value of plan assets at end of fiscal year	1,010	819
Hedge Funds \| Significant Unobservable Inputs (Level 3)
Roll-Forwards of assets measured at fair value using Level 3 inputs
Fair value of plan assets at beginning of fiscal year	579	580
Contributions into Fund	175	6
Realized gains (losses)	11
Unrealized gains (losses)	55	(7)
Distributions	(81)
Fair value of plan assets at end of fiscal year	739	579
Private Equity \| Significant Unobservable Inputs (Level 3)
Roll-Forwards of assets measured at fair value using Level 3 inputs
Fair value of plan assets at beginning of fiscal year	159	150
Contributions into Fund	49	27
Realized gains (losses)	15	18
Unrealized gains (losses)		3
Distributions	(49)	(45)
Other	6	6
Fair value of plan assets at end of fiscal year	180	159
Real Estate \| Significant Unobservable Inputs (Level 3)
Roll-Forwards of assets measured at fair value using Level 3 inputs
Fair value of plan assets at beginning of fiscal year	81	62
Contributions into Fund	23	17
Realized gains (losses)	3	3
Unrealized gains (losses)	2	8
Distributions	(22)	(10)
Other	4	1
Fair value of plan assets at end of fiscal year	$ 91	$ 81

This element represents the distributions on plan assets of defined benefit plans for the period.

No definition available.

Name:	kr_DefinedBenefitPlanDistributions
Namespace Prefix:	kr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Changes in the fair value of plan assets as a result of other items not defined in the taxonomy.

+ References

No definition available.

+ Details

Name:	kr_DefinedBenefitPlanOther
Namespace Prefix:	kr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

This element represents the realized gains (losses) on plan assets of defined benefit plans for the period.

+ References

No definition available.

+ Details

Name:	kr_DefinedBenefitPlanRealizedGainsLosses
Namespace Prefix:	kr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	kr_DefinedBenefitPlanReconciliationForAssetsMeasuredAtFairValueUsingSignificantUnobservableInputsRollForward
Namespace Prefix:	kr_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

This element represents the unrealized gains (losses) on plan assets of defined benefit plans for the period.

+ References

No definition available.

+ Details

Name:	kr_DefinedBenefitPlanUnrealizedGainsLosses
Namespace Prefix:	kr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The amount of contributions to employee 401(k) retirement savings accounts made by the employer.

+ References

No definition available.

+ Details

Name:	kr_DefinedContributionPlanContributionsByEmployer
Namespace Prefix:	kr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The increase in the fair value of plan assets from contributions made by the employer.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5

-Subparagraph b

-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 50

-Paragraph 1

-Subparagraph (b)(3)

-URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920

+ Details

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

- Definition

Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 30

-Section 35

-Paragraph 50

-URI http://asc.fasb.org/extlink&oid=6867990&loc=d3e12355-114930

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 87

-Paragraph 49

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5

-Subparagraph d(iv)(b)(i)

-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 Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5

-Subparagraph b

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920

+ Details

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

- Definition

The amount of the cost recognized during the period for defined contribution plans.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 70

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6414718&loc=d3e28014-114942

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 11

-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.

+ Details

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