Net amount of the difference between the fair value and market value on investments in available-for-sale securities.

No definition available.

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Period Type:	instant

- Definition

Represents the amount of transfers of assets measured on a recurring basis out of Level 3 of the fair value hierarchy into Level 1.

+ References

No definition available.

+ Details

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- Definition

The fair value amount of warrants as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	kr_WarrantsFairValueDisclosure
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- Definition

The net of assets and liabilities.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 946

-SubTopic 225

-Section S99

-Paragraph 3

-Subparagraph (SX 210.6-09.6,7)

-URI http://asc.fasb.org/extlink&oid=6488393&loc=d3e606914-122999

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 946

-SubTopic 210

-Section S99

-Paragraph 2

-Subparagraph (SX 210.6-05.4)

-URI http://asc.fasb.org/extlink&oid=6488278&loc=d3e604008-122996

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 05

-Paragraph 4

-Article 6

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 09

-Paragraph 19

-Article 6

+ Details

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Data Type:	xbrli:monetaryItemType
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Period Type:	instant

- Definition

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 25

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=28360136&loc=d3e22054-111558

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 50

-Paragraph 5

-Subparagraph (aa)

-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26610-111562

+ Details

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- Definition

Fair value of the assets less the liabilities of a derivative or group of derivatives.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 10

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13433-108611

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 45

-Paragraph 5

-URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 15

-URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13495-108611

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 45

-Paragraph 6

-URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41271-113958

+ Details

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Balance Type:	debit
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- Details

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- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

+ References

No definition available.

+ Details

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- Definition

Long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 280

-SubTopic 10

-Section 50

-Paragraph 41

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9038-108599

+ Details

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- Definition

The charge against earnings resulting from the write down of long lived assets other than goodwill due to the difference between the carrying value and lower fair value.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6391110&loc=d3e2921-110230

+ Details

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- Definition

Fair value portion of other assets.

+ References

No definition available.

+ Details

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FAIR VALUE MEASUREMENTS (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Nov. 09, 2013	Nov. 03, 2012	Nov. 09, 2013 Carrying Value	Feb. 02, 2013 Carrying Value	Nov. 09, 2013 Carrying Value Before impairment	Nov. 03, 2012 Carrying Value Before impairment	Nov. 09, 2013 Significant Unobservable Inputs (Level 3)	Feb. 02, 2013 Significant Unobservable Inputs (Level 3)	Nov. 09, 2013 Fair value	Feb. 02, 2013 Fair value	Nov. 03, 2012 Fair value	May 25, 2013 Recurring	Nov. 09, 2013 Recurring Quoted Prices in Active Markets for Identical Assets (Level 1)	Feb. 02, 2013 Recurring Quoted Prices in Active Markets for Identical Assets (Level 1)	Nov. 09, 2013 Recurring Significant Other Observable Inputs (Level 2)	Feb. 02, 2013 Recurring Significant Other Observable Inputs (Level 2)	Nov. 09, 2013 Recurring Significant Other Observable Inputs (Level 2) Interest Rate Hedges	Feb. 02, 2013 Recurring Significant Other Observable Inputs (Level 2) Interest Rate Hedges	Feb. 02, 2013 Recurring Significant Unobservable Inputs (Level 3)	Nov. 09, 2013 Recurring Fair value	Feb. 02, 2013 Recurring Fair value	Nov. 09, 2013 Recurring Fair value Interest Rate Hedges	Feb. 02, 2013 Recurring Fair value Interest Rate Hedges	Nov. 09, 2013 Nonrecurring Significant Unobservable Inputs (Level 3)	Feb. 02, 2013 Nonrecurring Significant Unobservable Inputs (Level 3)
Fair value of financial instruments carried at fair value
Available-for-Sale Securities													$ 33	$ 8					$ 20	$ 33	$ 28
Warrants															13					13
Long-Lived Assets					48	14			18	8	4													18	8
Interest Rate Hedges																	15	6				15	6
Total							18	28	79	42			33	8	28	6
Assets transferred from Level 3 to Level 1												20
Unrealized gains on available-for-sale securities													5
Total debt			7,878	8,476					8,440	9,339
Other assets			52	44					52	44
Asset impairment charge	$ 30	$ 10