Business and Summary of Significant Accounting Policies (Policies)	6 Months Ended
	Jul. 02, 2022
Accounting Policies [Abstract]
Business & Basis of Presentation	Business & Basis of Presentation We prepared the condensed consolidated financial statements as of and for the three and six months ended July 2, 2022 of Sleep Number Corporation and our 100%-owned subsidiaries (Sleep Number or the Company), without audit, pursuant to the rules and regulations of the Securities and Exchange Commission (SEC) and they reflect, in the opinion of management, all normal recurring adjustments necessary to present fairly our financial position as of July 2, 2022 and January 1, 2022, and the consolidated results of operations and cash flows for the periods presented. Our historical and quarterly consolidated results of operations may not be indicative of the results that may be achieved for the full year or any future period. In addition, based on the duration and severity of the current global situation involving the COVID-19 pandemic, the war in Ukraine, historic low consumer sentiment and other external factors, including but not limited to general economic conditions, inflation, consumer sentiment, store restrictions mandated by federal, state or local authorities and global supply chain disruptions (especially disruptive supply and flow of semiconductor chips and other electronic components), the extent to which these external factors will impact our business and our consolidated financial results will depend on future developments, which are highly uncertain and cannot be predicted. Certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. generally accepted accounting principles (GAAP) have been condensed or omitted pursuant to such rules and regulations. These condensed consolidated financial statements should be read in conjunction with our most recent audited consolidated financial statements and related notes included in our Annual Report on Form 10-K for the fiscal year ended January 1, 2022 and other recent filings with the SEC.
Use of Estimates	The preparation of condensed consolidated financial statements in conformity with U.S. GAAP requires us to make estimates and assumptions. These estimates and assumptions affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the condensed consolidated financial statements, and the reported amounts of sales, expenses and income taxes during the reporting period. Predicting future events is inherently an imprecise activity and, as such, requires the use of judgment. As future events and their effects cannot be determined with precision, actual results could differ significantly from these estimates. In addition, during the current environment involving external factors such as COVID-19, historic low consumer sentiment and the war in Ukraine, predicting future events will be especially challenging for management. Changes in these estimates will be reflected in the consolidated financial statements in future periods and could be material. Our critical accounting policies consist of stock-based compensation, warranty liabilities and revenue recognition.
Consolidation	The condensed consolidated financial statements include the accounts of Sleep Number Corporation and our 100%-owned subsidiaries. All significant intra-entity balances and transactions have been eliminated in consolidation.
Leases	We lease our retail, office and manufacturing space under operating leases which, in addition to the minimum lease payments, may require payment of a proportionate share of the real estate taxes and certain building operating expenses. While our local market development approach generally results in long-term participation in given markets, our retail store leases generally provide for an initial lease term of five to 10 years. Our office and manufacturing leases provide for an initial lease term of up to 15 years. In addition, our mall-based retail store leases may require payment of variable rent based on net sales in excess of certain thresholds. Certain leases may contain options to extend the term of the original lease. The exercise of lease renewal options is at our sole discretion. Lease options are included in the lease term only if exercise is reasonably certain at lease commencement. Our lease agreements do not contain any material residual value guarantees. We also lease vehicles and certain equipment under operating leases with an initial lease term of three to five years. Our operating lease costs include facility, vehicle and equipment lease costs, but exclude variable lease costs. Operating lease costs are recognized on a straight-line basis over the lease term, after consideration of rent escalations and rent holidays. The lease term for purposes of the calculation begins on the earlier of the lease commencement date or the date we take possession of the property. During lease renewal negotiations that extend beyond the original lease term, we estimate straight-line rent expense based on current market conditions. Variable lease costs are recorded when it is probable the cost has been incurred and the amount can be reasonably estimated. Future payments for real estate taxes and certain building operating expenses for which we are obligated are not included in operating lease costs.