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The amount of future lease obligations expected to be paid related to store closings as of the balance sheet date.

+ References

No definition available.

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- Definition

The amount of future lease obligations expected to be paid related to store closings as of the balance sheet date, arising from business acquisition.

+ References

No definition available.

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- Definition

Additional obligations recognized during the period to the future lease obligations accrual due to recently closed stores.

+ References

No definition available.

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- Definition

Other transactions during the period related to future lease obligations accrual for closed stores.

+ References

No definition available.

+ Details

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- Definition

Payments related to closed stores during the period related to the future lease obligations accrual.

+ References

No definition available.

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Data Type:	xbrli:monetaryItemType
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- Definition

The remaining terms of leases associated with closed stores.

+ References

No definition available.

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- Details

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- Definition

Amount charged against earnings in the period for incurred and estimated costs associated with self-insured coverages.

+ References

No definition available.

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- Definition

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, arising from business acquisition.

+ References

No definition available.

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- Definition

Amount of cash paid in the period to fully or partially settle claims made against self-insurance coverages.

+ References

No definition available.

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- Details

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- Definition

Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 720

-SubTopic 35

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6420018&loc=d3e36677-107848

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- Definition

The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

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- Definition

Duration of a fiscal period, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Includes, but not limited to, weeks in a year or quarter.

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No definition available.

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- Definition

Amount of difference between inventory at lower of LIFO cost or market and inventory at lower of other inventory accounting method cost or market, for example, but not limited to, FIFO or average cost.

+ 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 210.5-02.6(c))

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 6

-Subparagraph c

-Article 5

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Data Type:	xbrli:monetaryItemType
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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

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

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- Definition

The percentage of LIFO (last in first out) inventory to total inventory as of the balance sheet date if other than 100 percent.

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

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Name:	us-gaap_PropertyPlantAndEquipmentUsefulLife
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- Definition

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- Definition

Carrying amount 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 that are expected to be paid within one year (or the normal operating cycle, if longer).

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No definition available.

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Carrying amount 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 that are expected to be paid after one year (or the normal operating cycle, if longer).

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No definition available.

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ACCOUNTING POLICIES (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended						4 Months Ended		12 Months Ended
	Jan. 31, 2015	Nov. 08, 2014	Aug. 16, 2014	Feb. 01, 2014	Nov. 09, 2013	Aug. 17, 2013	May 24, 2014	May 25, 2013	Jan. 31, 2015	Feb. 01, 2014	Feb. 02, 2013
Fiscal Year
Length of fiscal year									364 days	364 days	371 days
Inventories
Percentage of inventory valued at LIFO method	95.00%us-gaap_PercentageOfLIFOInventory			95.00%us-gaap_PercentageOfLIFOInventory					95.00%us-gaap_PercentageOfLIFOInventory	95.00%us-gaap_PercentageOfLIFOInventory
Replacement cost over carrying value	$ 1,245us-gaap_InventoryLIFOReserve			$ 1,150us-gaap_InventoryLIFOReserve					$ 1,245us-gaap_InventoryLIFOReserve	$ 1,150us-gaap_InventoryLIFOReserve
Property, Plant and Equipment
Depreciation and amortization	467	456	444	402	395	387	581	519	1,948	1,703	1,652
Impairment of Long-Lived Assets
Asset impairment charge									37us-gaap_OtherAssetImpairmentCharges	39us-gaap_OtherAssetImpairmentCharges	18us-gaap_OtherAssetImpairmentCharges
Increase (Decrease) in the accrual activity for future lease obligations of closed stores
Balance at the beginning of the period							58kr_FutureLeaseObligationsClosedStores	44kr_FutureLeaseObligationsClosedStores	58kr_FutureLeaseObligationsClosedStores	44kr_FutureLeaseObligationsClosedStores
Additions									12	7
Payments									(11)	(9)
Other									(6)	(2)
Assumed from Harris Teeter										18
Balance at the end of the period	53kr_FutureLeaseObligationsClosedStores			58kr_FutureLeaseObligationsClosedStores					53kr_FutureLeaseObligationsClosedStores	58kr_FutureLeaseObligationsClosedStores	44kr_FutureLeaseObligationsClosedStores
Changes in self-insurance liability
Balance at the beginning of the period							569us-gaap_SelfInsuranceReserve	537us-gaap_SelfInsuranceReserve	569us-gaap_SelfInsuranceReserve	537us-gaap_SelfInsuranceReserve	529us-gaap_SelfInsuranceReserve
Expense									246kr_SelfInsuranceExpense	220kr_SelfInsuranceExpense	215kr_SelfInsuranceExpense
Claim payments									(216)kr_SelfInsuranceReserveClaimPayments	(215)kr_SelfInsuranceReserveClaimPayments	(207)kr_SelfInsuranceReserveClaimPayments
Assumed from Harris Teeter										27
Balance at the end of the period	599us-gaap_SelfInsuranceReserve			569us-gaap_SelfInsuranceReserve					599us-gaap_SelfInsuranceReserve	569us-gaap_SelfInsuranceReserve	537us-gaap_SelfInsuranceReserve
Less: Current portion	(213)us-gaap_SelfInsuranceReserveCurrent			(224)us-gaap_SelfInsuranceReserveCurrent					(213)us-gaap_SelfInsuranceReserveCurrent	(224)us-gaap_SelfInsuranceReserveCurrent	(205)us-gaap_SelfInsuranceReserveCurrent
Long-term portion	386us-gaap_SelfInsuranceReserveNoncurrent			345us-gaap_SelfInsuranceReserveNoncurrent					386us-gaap_SelfInsuranceReserveNoncurrent	345us-gaap_SelfInsuranceReserveNoncurrent	332us-gaap_SelfInsuranceReserveNoncurrent
Advertising Costs
Advertising costs									$ 648us-gaap_AdvertisingExpense	$ 587us-gaap_AdvertisingExpense	$ 553us-gaap_AdvertisingExpense
Minimum
Store Closing Costs
Remaining lease terms of closed stores									1 year
Maximum
Store Closing Costs
Remaining lease terms of closed stores									20 years
Buildings and land improvements \| Minimum
Property, Plant and Equipment
Useful life of the assets									10 years
Buildings and land improvements \| Maximum
Property, Plant and Equipment
Useful life of the assets									40 years
Store equipment \| Minimum
Property, Plant and Equipment
Useful life of the assets									3 years
Store equipment \| Maximum
Property, Plant and Equipment
Useful life of the assets									9 years
Leasehold improvements \| Minimum
Property, Plant and Equipment
Useful life of the assets									4 years
Leasehold improvements \| Maximum
Property, Plant and Equipment
Useful life of the assets									25 years
Manufacturing plant and distribution center equipment \| Minimum
Property, Plant and Equipment
Useful life of the assets									3 years
Manufacturing plant and distribution center equipment \| Maximum
Property, Plant and Equipment
Useful life of the assets									15 years
Information Technology
Property, Plant and Equipment
Useful life of the assets									5 years