Statistical Measurement [Domain] Statistical Measurement [Domain] PARTY-IN-INTEREST TRANSACTIONS EBP, Related Party and Party-in-Interest Transactions [Text Block] Interest income on notes receivable - participants EBP, Change in Net Asset Available for Benefit, Increase from Interest Income on Note Receivable from Participant Document Information [Line Items] Document Information [Line Items] Maximum loan amount EBP, Note Receivable from Participant, Account, Maximum Borrowing, Amount Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Participant contributions EBP, Participant Contribution, Receivable Subsequent Events EBP, Subsequent Event [Policy Text Block] EBP, Description of Plan and Accounting Change [Abstract] Investment Type [Axis] Investment Type [Axis] Rollovers EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Rollover Maximum loan amount, percentage EBP, Note Receivable from Participant, Account, Maximum Borrowing, to Total Account, Percentage EBP, Employer Contribution Vesting [Domain] EBP, Employer Contribution Vesting [Domain] EBP, Employer Contribution Vesting [Domain] Number of shares (in shares) EBP, Investment, Number of Shares INCOME TAX STATUS EBP, Tax Status [Text Block] EBP, Employer Contribution Vesting [Axis] EBP, Employer Contribution Vesting [Axis] EBP, Employer Contribution Vesting Total liabilities EBP, Liability Amounts allocated to withdrawals, not yet paid EBP, Reconciliation to Form 5500, Payment to Participant, Increase from Allocation to Withdrawing Participant, Not yet Paid Investment amount EBP, Risk and Uncertainty, Concentration of Investment at Fair Value to Net Assets, Amount EBP, Description of Plan [Line Items] EBP, Description of Plan [Line Items] Dividends, interest and capital gains EBP, Change in Net Asset Available for Benefit, Increase from Interest and Dividend Income on Investment Percentage of plan net assets available for benefits EBP, Risk and Uncertainty, Concentration of Investment at Fair Value to Net Assets, Percentage EBP, Schedule of Asset Held for Investment [Table] EBP, Schedule of Asset Held for Investment [Table] Notes receivable - participants EBP, Asset Held for Investment, Participant Loan, after Deemed Distribution FAIR VALUE MEASUREMENTS EBP, Investment, Fair Value and NAV [Text Block] Common stock purchased EBP, Investment Acquired, Excluding Plan Interest in Master Trust, Cost Vesting at completion of three years EBP, Employer Contribution Vesting, Tranche Three [Member] EBP, Employer Contribution Vesting, Tranche Three EBP, Investment, Fair Value and NAV [Table] EBP, Investment, Fair Value and NAV [Table] Allowance for credit losses EBP, Note Receivable from Participant, Allowance for Credit Loss Total contributions EBP, Change in Net Asset Available for Benefit, Increase from Contribution Contribution vesting period EBP, Employer Contribution Vesting Service Period EBP, Employer Contribution Vesting Service Period Minimum loan amount EBP, Note Receivable from Participant, Account, Minimum Borrowing, Amount Subsequent Event Subsequent Event [Member] Accrued liabilities EBP, Accrued Expense Loan term EBP, Note Receivable From Participant, General Loan, Borrowing Term EBP, Note Receivable From Participant, General Loan, Borrowing Term EBP, Related Party and Party-in-Interest Transactions [Table] EBP, Related Party and Party-in-Interest Transactions [Table] Benefits paid to participants EBP, Change in Net Asset Available for Benefit, Decrease from Payment to Participant Company contributions EBP, Employer Contribution, Receivable Participant EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Excluding Rollover Payment of Benefits EBP, Payment to Participant [Policy Text Block] Net assets available for benefits Net assets available for benefits - beginning of year Net assets available for benefits - end of year EBP, Net Asset Available for Benefit Common stock, cost basis EBP, Investment, Excluding Plan Interest in Master Trust, Cost Basis EBP, Investment, Excluding Plan Interest in Master Trust, Cost Basis EBP, Schedule of Asset Held for Investment [Line Items] EBP, Schedule of Asset Held for Investment [Line Items] EBP, Accounting Policy [Line Items] EBP, Accounting Policy [Line Items] Assets EBP, Asset EBP 001 EBP 001 [Member] EBP 001 Percent increase (decrease) in stock price EBP, Investment, Share Price, Period Increase (Decrease), Percent EBP, Investment, Share Price, Period Increase (Decrease), Percent Sleep Number Corporation common stock EBP, Employer, Common Stock [Member] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] EBP, Tax Status [Abstract] Increase in net assets available for benefits EBP, Change in Net Asset Available for Benefit, Increase (Decrease) Cover [Abstract] Plan Termination EBP, Plan Termination [Policy Text Block] EBP, Plan Termination Maximum Maximum [Member] Company, net Company matching contributions, net EBP, Change in Net Asset Available for Benefit, Increase from Employer Contribution, Cash Assets EBP, Asset [Abstract] Concentration threshold, percentage EBP, Risk and Uncertainty, Concentration of Investment, Benchmark Threshold Percentage Maximum participant contribution, percentag EBP, Participant Contribution, Pretax, Maximum Annual Compensation to Total Compensation, Percentage Minimum Minimum [Member] Subsequent Event Type [Domain] Subsequent Event Type [Domain] EBP, Schedule of Asset Held for Investment [Abstract] Entity [Domain] Entity [Domain] Total EBP, Asset Held for Investment Investment, Identifier [Axis] Investment, Identifier [Axis] EBP, Investment, Fair Value and NAV [Abstract] Company matching percentage EBP, Employer Contribution, Matching Percentage Basis of Presentation EBP, Basis of Accounting [Policy Text Block] Increase (decrease) in fair value EBP, Investment, Fair Value, Period Increase (Decrease) EBP, Investment, Fair Value, Period Increase (Decrease) Vesting at completion of one year EBP, Employer Contribution Vesting, Tranche One [Member] EBP, Employer Contribution Vesting, Tranche One Risks and Uncertainties / Concentration of Market Risk EBP, Risk and Uncertainty [Policy Text Block] EBP, Tax Status [Line Items] EBP, Tax Status [Line Items] EBP, Statement of Change in Net Asset Available for Benefit [Table] EBP, Statement of Change in Net Asset Available for Benefit [Table] Mutual funds Mutual Fund [Member] EBP, Description of Plan [Table] EBP, Description of Plan [Table] Investment Valuation and Income Recognition EBP, Investment [Policy Text Block] Amendment Flag Amendment Flag Plan expenses, net EBP, Change in Net Asset Available for Benefit, Decrease from Administrative Expense Collective Trust funds Common Collective Trust [Member] Net asset value Fair Value Measured at Net Asset Value Per Share [Member] Plan's investments at fair value EBP, Investment, Fair Value and NAV [Table Text Block] Total deductions EBP, Change in Net Asset Available for Benefit, Decrease Investments, current value EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value EBP, Statement of Change in Net Asset Available for Benefit [Abstract] Common stock sold EBP, Investment Sold, Excluding Plan Interest in Master Trust, Selling Price EBP, Related Party and Party-in-Interest Transactions [Abstract] Forfeiture balance EBP, Forfeited Nonvested Account EBP, Related Party and Party-in-Interest Transactions [Line Items] EBP, Related Party and Party-in-Interest Transactions [Line Items] EBP, Statement of Net Asset Available for Benefit [Abstract] DESCRIPTION OF THE PLAN EBP, Description of Plan [Text Block] SIGNIFICANT ACCOUNTING POLICIES EBP, Summary of Accounting Policy [Text Block] Forfeitures used to pay administrative expenses EBP, Forfeited Nonvested Account, Decrease from Administrative Expense Vesting at completion of two years EBP, Employer Contribution Vesting, Tranche Two [Member] EBP, Employer Contribution Vesting, Tranche Two Total additions EBP, Change in Net Asset Available for Benefit, Increase EBP, Statement of Net Asset Available for Benefit [Line Items] EBP, Statement of Net Asset Available for Benefit [Line Items] Entity Central Index Key Entity Central Index Key Loan interest rate EBP, Asset Held for Investment, Participant Loan, Interest Rate Participant-directed investments at fair value Total investments at fair value EBP, Investment, Excluding Plan Interest in Master Trust, Fair Value Legal Entity [Axis] Legal Entity [Axis] EIN Entity Tax Identification Number Total investment gain EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Income (Loss) on Investment Notes receivable, cost EBP, Asset Held for Investment, Participant Loan, Cost EBP, Asset Held for Investment, Participant Loan, Cost EBP, Accounting Policy, Accounting Standard Update, and Change in Accounting Principle [Abstract] Plan number EBP, Plan Number Contribution vesting percentage EBP, Employer Contribution Vesting Percentage EBP, Employer Contribution Vesting Percentage Contributions: EBP, Change in Net Asset Available for Benefit, Increase from Contribution [Abstract] Document Type Document Type Level 3 Fair Value, Inputs, Level 3 [Member] EBP, Statement of Net Asset Available for Benefit [Table] EBP, Statement of Net Asset Available for Benefit [Table] EBP, Investment, Fair Value and NAV [Line Items] EBP, Investment, Fair Value and NAV [Line Items] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Statistical Measurement [Axis] Statistical Measurement [Axis] Deductions from net assets attributed to: EBP, Change in Net Asset Available for Benefit, Decrease [Abstract] Notes receivable – participants EBP, Note Receivable from Participant Level 2 Fair Value, Inputs, Level 2 [Member] Schedule H, Line 4i – Schedule of Assets EBP, Schedule of Asset Held for Investment [Table Text Block] Additions to net assets attributed to: EBP, Change in Net Asset Available for Benefit, Increase [Abstract] Net realized/unrealized appreciation in fair value of investments EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Gain (Loss) on Investment Cash EBP, Noninterest-Bearing Cash EBP, Accounting Policy [Table] EBP, Accounting Policy [Table] Investments [Domain] Investments [Domain] Self-directed brokerage account EBP, Self-Directed Brokerage Account [Member] Document Information [Table] Document Information [Table] EBP, Statement of Change in Net Asset Available for Benefit [Line Items] EBP, Statement of Change in Net Asset Available for Benefit [Line Items] Level 1 Fair Value, Inputs, Level 1 [Member] Entity Registrant Name Entity Registrant Name Investment income: EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Income (Loss) on Investment [Abstract] EBP, Tax Status [Table] EBP, Tax Status [Table] Loan term, primary residence EBP, Note Receivable From Participant, Account, Primary Residence, Maximum Borrowing Term EBP, Note Receivable From Participant, Account, Primary Residence, Maximum Borrowing Term Liabilities EBP, Liability [Abstract] Receivables: EBP, Receivable [Abstract] Level 1, Level 2, and Level 3 Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] Total receivables EBP, Receivable Company matching on participants eligible earnings percentage EBP, Employer Contribution, Participant Compensation Matched, Percentage