Business and Summary of Significant Accounting Policies	9 Months Ended
Business and Summary of Significant Accounting Policies	Sep. 27, 2025
Accounting Policies [Abstract]
Business and Summary of Significant Accounting Policies	Business and Summary of Significant Accounting Policies Business & Basis of Presentation The Company prepared the condensed consolidated financial statements as of and for the three and nine months ended September 27, 2025 of Sleep Number Corporation and its 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, including the elimination of all significant intra-entity balances and transactions, necessary to present fairly its financial position as of September 27, 2025 and December 28, 2024, and the consolidated results of operations and cash flows for the periods presented. The 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. 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 the most recent audited consolidated financial statements and related notes included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 28, 2024 and other recent filings with the SEC. The preparation of condensed consolidated financial statements in conformity with U.S. GAAP requires the Company 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. Changes in these estimates will be reflected in the consolidated financial statements in future periods and could be material. The Company’s critical accounting policies consist of stock-based compensation, warranty liabilities and revenue recognition. Accounting Pronouncements Issued But Not Yet Effective In December 2023, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2023-09, "Income Taxes (Topic 740): Improvements in Income Tax Disclosures" to enhance the transparency and decision usefulness of income tax disclosures. This amendment requires public companies to disclose specific categories in the rate reconciliation and provide additional information for reconciling items that meet a quantitative threshold. Additionally, under the amendment, entities are required to disclose the amount of income taxes paid disaggregated by federal, state and foreign taxes, as well as disaggregated by material individual jurisdictions. Finally, the amendment requires entities to disclose income from continuing operations before income tax expense disaggregated between domestic and foreign and income tax expense from continuing operations disaggregated by federal, state and foreign. The new rules are effective for annual periods beginning after December 15, 2024. The adoption of this standard is not expected to have a material impact on the Company’s consolidated financial statements and related disclosures. In November 2024, the FASB issued ASU 2024-03, "Income Statement - Reporting Comprehensive Income - Expense Disaggregation Disclosures (Subtopic 220-40)", which requires public business entities to disclose in the notes to the financial statements more detailed information about the types of expenses included in certain expense captions in the consolidated financial statements, including purchases of inventory, employee compensation, and depreciation and amortization. The amendments are effective for the Company beginning with the 2027 annual period and in interim periods beginning in 2028. Early adoption is permitted. The ASU may be adopted prospectively or retrospectively. The Company is currently evaluating the impact of ASU 2024-03 on its consolidated financial statements and related disclosures. In July 2025, the FASB issued ASU 2025-05, “Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses for Accounts Receivable and Contract Assets”, which provides a practical expedient related to the estimation of expected credit losses for current accounts receivable and current contract assets arising from transactions accounted for under Topic 606, including those assets acquired in a business combination. The practical expedient permits an entity to assume that current conditions as of the balance sheet date do not change for the remaining life of the current accounts receivable and current contract assets. This guidance is effective for the Company for its fiscal year and all interim periods beginning January 4, 2026 on a prospective basis. Early adoption is permitted. The Company is currently evaluating the impact of the adoption of this guidance on its condensed consolidated financial statements. Currently, management does not believe that any other recently issued, but not yet effective accounting pronouncements, if adopted in their current form, would have a material impact on the Company’s consolidated financial statements. Other Investments The Company made a payment of $3.3 million during the second quarter of 2025 to secure contractual rights from a strategic product-development partner. This payment was included in prepaid expenses in the Company’s condensed consolidated balance sheet and as an investing activity in the Company’s condensed consolidated statement of cash flows. In the third quarter of 2025, the Company made the decision to end business operations with the strategic- development partner. In connection with this decision, the Company evaluated the recoverability of assets associated with those operations and determined that the carrying amounts of those assets were unlikely to be recoverable and recorded an impairment charge of $16.1 million, which are included in restructuring costs in the consolidated statements of operations.