Document and Entity Information [Abstract] Document Information [Table] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] Represents the retirement plan number 010. E B P 010 [Member] 401(k) Retirement Savings Account Plan Document Information [Line Items] Document Type Entity Registrant Name Entity Tax Identification Number EIN Entity Central Index Key Amendment Flag Statements of Net Assets Available for Benefits EBP, Statement of Net Asset Available for Benefit [Table] EBP, Statement of Net Asset Available for Benefit [Line Items] Statements of Net Assets Available for Benefits EBP, Asset [Abstract] Assets: EBP, Investment, Fair Value [Abstract] Investments, at fair value: EBP, Investment, Plan Interest in Master Trust, Fair Value Interest in Master Trust Total investments in Master Trust measured at fair value EBP, Investment, Excluding Plan Interest in Master Trust, Fair Value Corporate stock held outside Master Trust Corporate Stock held outside of Master Trust EBP, Investment, Fair Value Investments at Fair Value Investments, at fair value, total EBP, Investment, Contract Value [Abstract] Investments, at contract value: EBP, Investment, Plan Interest in Master Trust, Contract Value Interest in Master Trust EBP, Receivable [Abstract] Receivables: EBP, Employer Contribution, Receivable Employer contributions EBP, Note Receivable from Participant Notes receivable from participants EBP, Receivable Total Receivables EBP, Asset Total assets EBP, Liability [Abstract] Liabilities: EBP, Accrued Expense Administrative fees payable EBP, Net Asset Available for Benefit End of year Beginning of year Net assets available for benefits Statements of Changes in Net Assets Available for Benefits EBP, Statement of Change in Net Asset Available for Benefit [Table] EBP, Statement of Change in Net Asset Available for Benefit [Line Items] Statements of Changes in Net Assets Available for Benefits EBP, Change in Net Asset Available for Benefit, Increase [Abstract] Additions: EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution Participant contributions EBP, Change in Net Asset Available for Benefit, Increase from Employer Contribution, Cash and Noncash Employer contributions EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Income (Loss) on Investment Investment income Net investment income EBP, Change in Net Asset Available for Benefit, Increase from Interest Income on Note Receivable from Participant Interest income on notes receivable from participants Interest from loans EBP, Change in Net Asset Available for Benefit, Decrease [Abstract] Deductions: EBP, Change in Net Asset Available for Benefit, Decrease from Payment to Participant Benefits paid to participants Benefit payments EBP, Change in Net Asset Available for Benefit, Decrease from Administrative Expense Administrative expenses EBP, Change in Net Asset Available for Benefit, Increase (Decrease) Net change EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Income (Loss) on Investment [Abstract] Net assets available for benefits: EBP, Change in Net Asset Available for Benefit, Transfer to (from) Plan Transfers from The Kroger Co. Savings Plan Net transfer out of Company Stock Investment Fund Description of Plan EBP, Description of Plan [Table] EBP, Description of Plan [Line Items] Description of Plan Plan Termination EBP, Description of Plan [Text Block] Description of Plan Summary of Significant Accounting Policies EBP, Accounting Policy [Table] EBP, Accounting Policy [Line Items] Summary of Significant Accounting Policies EBP, Summary of Accounting Policy [Text Block] Summary of Significant Accounting Policies Investment Contracts EBP, Fully Benefit-Responsive Investment Contract [Table] EBP, Fully Benefit-Responsive Investment Contract [Line Items] Investment Contracts EBP, Fully Benefit-Responsive Investment Contract [Text Block] Investment Contracts Master Trust EBP, Master Trust [Table] EBP, Master Trust [Line Items] Master Trust EBP, Master Trust [Text Block] Master Trust Fair Value Measurements EBP, Investment, Fair Value and NAV [Table] EBP, Investment, Fair Value and NAV [Line Items] Fair Value Measurements EBP, Investment, Fair Value and NAV [Text Block] Fair Value Measurements Income Tax Status EBP, Tax Status [Table] EBP, Tax Status [Line Items] Income Tax Status EBP, Tax Status [Text Block] Income Tax Status Risks and Uncertainties EBP, Risk and Uncertainty [Table] EBP, Risk and Uncertainty [Line Items] Risks and Uncertainties EBP, Risk and Uncertainty [Text Block] Risks and Uncertainties No definition available. Plan Termination EBP, Plan Termination [Text Block] Plan Termination Related-Party and Party-in-interest Transactions EBP, Related Party and Party-in-Interest Transactions [Table] EBP, Related Party and Party-in-Interest Transactions [Line Items] Related-Party and Party-in-interest Transactions EBP, Related Party and Party-in-Interest Transactions [Text Block] Related-Party and Party-in-interest Transactions No definition available. Plan Amendments and Plan Merger Disclosure of information about plan amendments and plan merger to employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Employee Benefit Plan, Description Of Plan Amendment And Plan Merger [Table] Employee Benefit Plan, Description Of Plan Amendment And Plan Merger [Table] 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. Employee Benefit Plan, Description Of Plan Amendment And Plan Merger [Line Items] Plan Amendments and Plan Merger The entire disclosure for description of amendment and plan merger to employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Employee Benefit Plan, Description Of Plan Amendment And Plan Merger [Text Block] Plan Amendments and Plan Merger No definition available. Plan Correction Disclosure of information about plan correction to employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Employee Benefit Plan, Plan Correction [Table] 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. Employee Benefit Plan, Plan Correction [Line Items] Plan Correction The entire disclosure for plan correction to employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Employee Benefit Plan, Plan Correction [Text Block] Plan Correction Schedule H, Part IV, 4i - Schedule of Assets (Held at End of Year) EBP, Schedule of Asset Held for Investment [Table] EBP, Schedule of Asset Held for Investment [Line Items] Schedule H, Part IV, 4i - Schedule of Assets (Held at End of Year) EBP, Schedule of Asset Held for Investment [Text Block] Schedule H, Part IV, 4i - Schedule of Assets (Held at End of Year) EBP, Basis of Accounting [Policy Text Block] Basis of accounting EBP, Master Trust [Policy Text Block] Master Trust EBP, Investment [Policy Text Block] Investment valuation and income recognition EBP, Use of Estimate [Policy Text Block] Estimates EBP, Expense [Policy Text Block] Administrative expenses EBP, Subsequent Event [Policy Text Block] Subsequent events EBP, Master Trust [Table Text Block] Schedule of financial information and Statements of Changes in Net Assets of the Master Trust EBP, Investment, Fair Value and NAV [Table Text Block] Schedule of Plan's Assets Fair Value Hierarchy Disclosure of investments whose fair value is estimated using net asset value (NAV) per share (or its equivalent), including related information such as fair value, unfunded commitments, redemption frequency, redemption notice periods, and other terms and conditions associated with the investments. Employee Benefit Plan, Investment, Fair Value Estimated Using NAV Per Share [Table Text Block] Summary of investments for which fair value is measured using the NAV per share Statistical Measurement [Axis] Statistical Measurement [Domain] Maximum [Member] Maximum Minimum [Member] Minimum Represents the minimum service period for plan eligibility under employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Employee Benefit Plan, Minimum Service Period For Plan Eligibility Minimum service period for Plan eligibility EBP, Participant Contribution, Pretax, Maximum Annual Compensation to Total Compensation, Percentage Participant contribution (as a percent) EBP, Employer Contribution, Participant Compensation Matched, Percentage Employer matching contribution (as a percent) Represents the minimum age criteria for the eligibility of Automatic Retirement Contribution under employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Employee Benefit Plan, Automatic Retirement Contribution, Minimum Age Minimum age for Automatic Retirement Contribution Represents the minimum service hours per year for the eligibility of Automatic Retirement Contribution under employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Employee Benefit Plan, Automatic Retirement Contribution, Minimum Hours Of Service Minimum service hours for Automatic Retirement Contribution EBP, Employer Contribution, Matching Percentage Employer contribution matching percentage Percentage of compensation allocation for Automatic Retirement Contribution under employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Employee Benefit Plan, Automatic Retirement Contribution, Percentage Of Contribution Allocation Percentage of contribution allocation under Automatic Retirement Contribution Represents the minimum service year for the eligibility of vesting under employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Employee Benefit Plan, Vesting, Minimum Years Of Service Minimum service years for Automatic Retirement Contribution Scenario [Axis] Scenario [Domain] Represents information pertaining to accounts other than Automatic Retirement Contribution, Roth, and Merged ESOP subaccounts. Other Than Automatic Retirement Contribution, Roth, and Merged ESOP Subaccounts [Member] Other than ARC, Roth, and Merged ESOP subaccounts EBP, Note Receivable from Participant, Account, Maximum Borrowing, to Total Account, Percentage Maximum vested account balance for loans (as a percent) The duration available for participant loan of employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Employee Benefit Plan, Notes Receivable From Participant, Term Loan term range The maximum term of participant loan of employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Employee Benefit Plan, Note Receivable From Participant, Maximum Term Maximum loan term EBP, Asset Held for Investment, Participant Loan, Interest Rate Interest rates for participants loans Severance period considered for forfeiture under employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Employee Benefit Plan, Severance Period For Forfeiture Severance period for forfeiture EBP, Forfeited Nonvested Account Forfeited account balance Amount of decrease in forfeited nonvested account of employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) from administrative expense and employer contribution. EBP, Forfeited Nonvested Account, Decrease From Administrative Expenses And Employer Contribution Forfeited nonvested account, decrease from administrative expenses and employer contribution Investment Type [Axis] Investments [Domain] Cash and Cash Equivalents [Member] Cash and Cash Equivalents EBP, Employer, Common Stock [Member] Kroger shares Corporate Stocks Corporate Bond Securities [Member] Corporate Bonds Common Collective Trust [Member] Collective Trusts/Comingled Funds Collective trusts/ Comingled funds Represents information pertaining to fixed maturity synthetic investment contracts. Employee Benefit Plan, Synthetic Investment Contract, Fixed Maturity [Member] Fixed Maturity Synthetic GICS Represents information pertaining to constant duration synthetic investment contracts. Employee Benefit Plan, Synthetic Investment Contract, Constant Duration [Member] Constant Duration Synthetic GICS EBP, Nonconsolidated, Master Trust and Plan Interest in Master Trust [Axis] EBP, Nonconsolidated, Master Trust and Plan Interest in Master Trust [Axis] EBP, Nonconsolidated, Master Trust and Plan Interest in Master Trust [Domain] EBP, Nonconsolidated, Master Trust and Plan Interest in Master Trust [Domain] EBP, Nonconsolidated, Master Trust [Member] Nonconsolidated, Master Trust [Member] EBP, Nonconsolidated, Plan Interest in Master Trust [Member] Nonconsolidated, Plan Interest in Master Trust [Member] Represents the percentage of ownership interest in the master trust held by employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Employee Benefit Plan, Ownership Interest In Master Trust Ownership interest (as a percent) EBP, Investment, Contract Value Investments at Contract Value EBP, Investment, Fair and Contract Value Total Investments EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Gain (Loss) on Investment Net appreciation EBP, Change in Net Asset Available for Benefit, Increase from Dividend Income on Investment Dividends EBP, Change in Net Asset Available for Benefit, Increase from Contribution Contributions Amount of increase (decrease) in net asset available for benefit excluding net investment income to participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Employee Benefit Plan, Change In Net Asset Available For Benefit, Increase (Decrease) Excluding Net Investment Income Net transfers out Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] Total Fair Value, Inputs, Level 1 [Member] Level 1 Fair Value, Inputs, Level 2 [Member] Level 2 Fair Value Measured at Net Asset Value Per Share [Member] NAV EBP, Fair Value, Investment, NAV, Redemption, Notice Period Redemption Notice Period EBP, Tax Determination Letter, Obtained [true false] Determination letter obtained EBP, Tax Determination Letter, Date Determination letter date EBP, Related Party and Party-in-Interest [Axis] EBP, Related Party and Party-in-Interest [Domain] Employer of participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Employee Benefit Plan, Employer [Member] Kroger EBP, Investment, Purchased, Number of Shares Shares purchased EBP, Investment Acquired, Excluding Plan Interest in Master Trust, Cost Cost of shares purchased EBP, Investment, Sold, Number of Shares Shares sold EBP, Investment Sold, Excluding Plan Interest in Master Trust, Selling Price Value of shares sold EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Realized Gain (Loss) on Investment Realized gain EBP, Plan Number Plan number EBP, Asset Held for Investment, Plan Interest in Master Trust, Participation Status [Extensible Enumeration] EBP, Asset Held for Investment, Plan Interest in Master Trust, Current Value Current value EBP, Investment, Current Value, Type [Extensible Enumeration] EBP, Investment, Current Value, Type [Extensible Enumeration] EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value Current Value EBP, Asset Held for Investment, Participant Loan, after Deemed Distribution Participant loans EBP, Asset Held for Investment Total assets