Amount of contributions made to multiemployer plans by the employer due to commitments and withdrawal liabilities.

No definition available.

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

- Definition

The amount of the after-tax charge of commitments and withdrawal liabilities associated with the restructuring of pension plan agreements.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The amount of the before-tax charge of commitments and withdrawal liabilities associated with the restructuring of pension plan agreements.

+ References

No definition available.

+ Details

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

- Definition

Represents the minimum percentage that the Company contributed to the pension fund, as a percentage of the total amount contributed by all employers participating in the plan.

+ References

No definition available.

+ Details

Name:	kr_MultiemployerPlansMinimumPercentageOfContributionsOfTotalContributionsReceivedByPensionFund
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Data Type:	num:percentItemType
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Period Type:	instant

- Definition

Represents the total number of most significant collective bargaining agreements for the entity related to this pension fund.

+ References

No definition available.

+ Details

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Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents percentage of funded status.

+ References

No definition available.

+ Details

Name:	kr_MultiemployerPlansPercentageOfFundedStatus
Namespace Prefix:	kr_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of contributions made to multiemployer plan by employer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 80
-Section 50
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=65877416&loc=SL14450691-114947

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 80
-Section 50
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=65877416&loc=SL14450702-114947

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 80
-Section 50
-Paragraph 5
-Subparagraph (e)(1)
-URI http://asc.fasb.org/extlink&oid=65877416&loc=SL14450657-114947

+ Details

Name:	us-gaap_MultiemployerPlanContributionsByEmployer
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_MultiemployerPlansLineItems
Namespace Prefix:	us-gaap_
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Period Type:	duration

MULTI-EMPLOYER PENSION PLANS (Details) $ in Millions	3 Months Ended		4 Months Ended		12 Months Ended
MULTI-EMPLOYER PENSION PLANS (Details) $ in Millions	Feb. 02, 2019 USD ($)	Feb. 03, 2018 USD ($)	May 26, 2018 USD ($)	May 20, 2017 USD ($)	Feb. 02, 2019 USD ($) item	Feb. 03, 2018 USD ($)	Jan. 28, 2017 USD ($)	May 31, 2016
Red zone \| Maximum
Multiemployer Plans
Percentage of funded status					65.00%
Yellow zone \| Maximum
Multiemployer Plans
Percentage of funded status					80.00%
Green zone \| Minimum
Multiemployer Plans
Percentage of funded status					80.00%
Other Health And Welfare Benefits Multiemployer Plans
Multiemployer Plans
Employer contribution to multi-employer plans					$ 1,282	$ 1,247	$ 1,143
Multi-employer pension funds
Multiemployer Plans
Employer contribution to multi-employer plans					358	954	289
Charge (before-tax) related to pension plan agreements	$ 168	$ 351	$ 13	$ 199	155	550	111
Charge (after-tax) related to pension plan agreements	$ 131	$ 234	$ 10	$ 126	121	360	71
Multi-employer pension funds \| SO CA UFCW Unions & Food Employers Joint Pension Trust Fund
Multiemployer Plans
Employer contribution to multi-employer plans					$ 71	$ 66	$ 60
Minimum percentage of total contributions received by pension fund	5.00%	5.00%			5.00%	5.00%	5.00%
Most significant collective bargaining agreements count \| item					2
Multi-employer pension funds \| Desert States Employers & UFCW Unions Pension Plan
Multiemployer Plans
Employer contribution to multi-employer plans					$ 19	$ 18	$ 18
Minimum percentage of total contributions received by pension fund	5.00%	5.00%			5.00%	5.00%	5.00%
Most significant collective bargaining agreements count \| item					1
Multi-employer pension funds \| Sound Retirement Trust (formerly Retail Clerks Pension Plan)
Multiemployer Plans
Employer contribution to multi-employer plans					$ 23	$ 20	$ 18
Minimum percentage of total contributions received by pension fund	5.00%	5.00%			5.00%	5.00%	5.00%
Most significant collective bargaining agreements count \| item					3
Multi-employer pension funds \| Rocky Mountain UFCW Unions and Employers Pension Plan
Multiemployer Plans
Employer contribution to multi-employer plans					$ 20	$ 19	$ 16
Minimum percentage of total contributions received by pension fund	5.00%	5.00%			5.00%	5.00%	5.00%
Most significant collective bargaining agreements count \| item					1
Multi-employer pension funds \| Oregon Retail Employees Pension Plan
Multiemployer Plans
Employer contribution to multi-employer plans					$ 9	$ 9	$ 8
Minimum percentage of total contributions received by pension fund	5.00%	5.00%			5.00%	5.00%	5.00%
Most significant collective bargaining agreements count \| item					3
Multi-employer pension funds \| Bakery and Confectionary Union & Industry International Pension Fund
Multiemployer Plans
Employer contribution to multi-employer plans					$ 11	$ 11	$ 10
Minimum percentage of total contributions received by pension fund	5.00%	5.00%			5.00%	5.00%	5.00%
Most significant collective bargaining agreements count \| item					4
Multi-employer pension funds \| Retail Food Employers & UFCW Local 711 Pension
Multiemployer Plans
Employer contribution to multi-employer plans					$ 10	$ 10	$ 9
Minimum percentage of total contributions received by pension fund	5.00%	5.00%			5.00%	5.00%	5.00%
Most significant collective bargaining agreements count \| item					1
Multi-employer pension funds \| Denver Area Meat Cutters and Employers Pension Plan
Multiemployer Plans
Employer contribution to multi-employer plans							$ 3
Minimum percentage of total contributions received by pension fund								5.00%
Most significant collective bargaining agreements count \| item					1
Multi-employer pension funds \| United Food & Commercial Workers Intl Union - Industry Pension Fund
Multiemployer Plans
Employer contribution to multi-employer plans					$ 32	$ 33	$ 37
Minimum percentage of total contributions received by pension fund	5.00%	5.00%			5.00%	5.00%	5.00%
Most significant collective bargaining agreements count \| item					2
Multi-employer pension funds \| Western Conference of Teamsters Pension Plan
Multiemployer Plans
Employer contribution to multi-employer plans					$ 34	$ 34	$ 33
Most significant collective bargaining agreements count \| item					5
Multi-employer pension funds \| Central States, Southeast & Southwest Areas Pension Plan
Multiemployer Plans
Employer contribution to multi-employer plans					$ 18	492	23
Multi-employer pension funds \| Central States Pension Fund
Multiemployer Plans
Contribution due to commitments and withdrawal liabilities						467
Multi-employer pension funds \| UFCW Consolidated Pension Plan
Multiemployer Plans
Employer contribution to multi-employer plans					$ 55	201	34
Charge (before-tax) related to pension plan agreements						111
Charge (after-tax) related to pension plan agreements						$ 71
Contribution due to commitments and withdrawal liabilities							$ 28
Minimum percentage of total contributions received by pension fund	5.00%	5.00%			5.00%	5.00%	5.00%
Most significant collective bargaining agreements count \| item					8
Multi-employer pension funds \| IBT Consolidated Pension Plan
Multiemployer Plans
Employer contribution to multi-employer plans					$ 37
Minimum percentage of total contributions received by pension fund	5.00%	5.00%			5.00%	5.00%	5.00%
Most significant collective bargaining agreements count \| item					3
Multi-employer pension funds \| Other
Multiemployer Plans
Employer contribution to multi-employer plans					$ 19	$ 41	$ 20