Organization and Summary of Significant Accounting Policies	3 Months Ended
	Apr. 03, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization And Summary Of Significant Accounting Policies	ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Organization SunPower Corporation (together with its subsidiaries, “SunPower,” the “Company,” “we,” “us,” or “our”) is a leading solar technology and energy services provider that offers fully integrated solar, storage, and home energy solutions to customers primarily in the United States and Canada through an array of hardware, software, and financing options and “Smart Energy” solutions. Our Smart Energy initiative is designed to add layers of intelligent control to homes, buildings, and grids—all personalized through easy-to-use customer interfaces. We are a leader in the U.S. Distributed Generation (“DG”) storage and energy services market, providing customers control over electricity consumption and resiliency during power outages while providing cost savings to homeowners and businesses. Our sales channels include a strong network of both installing and non-installing dealers and resellers that operate in residential markets as well as a group of talented and driven in-house sales teams engaged in direct sales to end customers. We are invested in growing our business, by focusing on continued innovation, product development, and investments, while enhancing our customer experience and culture. SunPower is a majority-owned subsidiary of TotalEnergies Solar INTL SAS (“Total,” formerly Total Solar International SAS) and TotalEnergies Gaz & Electricité Holdings SAS (“Total Gaz,” formerly Total Gaz Electricité Holdings France SAS), each a subsidiary of TotalEnergies SE (“TotalEnergies SE,” formerly Total SE) (see “Note 3. Transactions with Total and TotalEnergies SE”). On February 6, 2022, we signed an Equity Purchase Agreement (the “Definitive Agreement”) with TotalEnergies Renewables USA, LLC (“TotalEnergies Renewables”), a Delaware limited liability company and wholly owned subsidiary of TotalEnergies SE, for the sale of our Commercial and Industrial Solutions (“C&I Solutions”) business. Subject to the terms and considerations set forth in the Definitive Agreement, TotalEnergies Renewables will acquire all of the issued and outstanding common stock of our C&I Solutions business for aggregate cash consideration of $190.0 million, which is subject to certain adjustments, including cash, indebtedness, working capital surplus/shortfall, and transaction expenses. We will receive additional consideration of up to $60.0 million in cash if certain legislative action is taken between February 6 and June 30, 2022. The sale is subject to customary closing conditions, including internal restructuring of certain legal entities before they are ready for sale, and is currently expected to close before the end of the second quarter of fiscal 2022. The pending sale meets the criteria for classification as “discontinued operations” in accordance with the guidance in ASC 205-20. Refer to Note 2. Discontinued Operations for details. Liquidity We believe that our cash and cash equivalents will be sufficient to meet our obligations over the next 12 months from the date of issuance of our financial statements, including repayment of our $425.0 million 4.00% senior convertible debentures due 2023 (the “4.00% debentures due 2023”), $100.0 million of which are held by TotalEnergies, which mature on January 15, 2023. The holders of 4.00% debentures due 2023 may exercise their right to convert into our common stock any time prior to their maturity, instead of cash repayment. In order for us to fulfil our obligation to repay the 4.00% debentures due 2023, we could use proceeds of sale of shares of Enphase Energy, Inc (“Enphase”) common stock, cash generated from operations, and proceeds from the pending sale of our C&I Solutions business to TotalEnergies Renewables. The C&I Solutions sale is subject to customary closing conditions, including internal restructuring of certain legal entities before they are ready for sale. We currently expect the sale to be completed during the second quarter of fiscal 2022. In addition, in the past we have generated liquidity by securing other sources of financing, such as accessing the capital markets; as well as implementing other cost reduction initiatives and deferring uncommitted expenditures, to address our liquidity needs. We believe it is probable that these actions will generate sufficient proceeds if needed to satisfy our debt obligations under the 4.00% debentures due 2023. However, we cannot predict, with certainty, the outcome of the actions discussed above to generate liquidity or whether such actions would generate the expected liquidity as currently planned. In the past we have refinanced and extended the maturity date of certain debts; however, there is no assurance that the 4.00% debentures due 2023 will be refinanced or their maturity extended to sufficiently meet our obligations as they become due or on terms acceptable to us. Basis of Presentation and Preparation Principles of Consolidation The accompanying condensed consolidated financial statements have been prepared by us in accordance with generally accepted accounting principles in the United States (“United States” or “U.S.,” and such accounting principles, “U.S. GAAP”) for interim financial information, and include the accounts of SunPower, all of our subsidiaries and special purpose entities, as appropriate under U.S. GAAP. All intercompany transactions and balances have been eliminated in consolidation. The financial information included herein is unaudited, and reflects all adjustments which are, in the opinion of our management, of a normal recurring nature and necessary for a fair statement of the results for the periods presented. The January 2, 2022 consolidated balance sheet data was derived from SunPower’s audited consolidated financial statements included in our Annual Report on Form 10-K for the fiscal year ended January 2, 2022, as filed with the Securities and Exchange Commission (“SEC”) on February 25, 2022, but does not include all disclosures required by U.S. GAAP. The condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in SunPower's Annual Report on Form 10-K for the fiscal year ended January 2, 2022. The operating results for the three months ended April 3, 2022 are not necessarily indicative of the results that may be expected for fiscal year 2022, or for any other future period. We have a 52-to-53-week fiscal year that ends on the Sunday closest to December 31. Accordingly, every fifth or sixth year will be a 53-week fiscal year. Both the current fiscal year, fiscal 2022, and prior fiscal year, fiscal 2021, are 52-week fiscal years. The first quarter of fiscal 2022 ended on April 3, 2022, while the first quarter of fiscal 2021 ended on April 4, 2021. Management Estimates The preparation of the condensed consolidated financial statements in conformity with U.S. GAAP requires our management to make estimates and assumptions that affect the amounts of assets and liabilities and disclosures of contingent assets and liabilities reported in these condensed consolidated financial statements and accompanying notes. We base our estimates on historical experience and various other assumptions believed to be reasonable. Our actual financial results could materially differ from those estimates. Significant estimates in these condensed consolidated financial statements include revenue recognition, specifically nature and timing of satisfaction of performance obligations, standalone selling price of performance obligations, and variable consideration; credit losses, including estimating macroeconomic factors affecting historical recovery rate of receivables; inventory and project asset write-downs; long-lived assets and goodwill impairment, specifically estimates for valuation assumptions including discount rates and future cash flows; fair value of investments, including equity investments for which we apply the fair value option and other financial instruments; valuation of goodwill and intangible assets acquired in a business combination; valuation of contingent consideration in a business combination; valuation of contingencies such as warranty and litigation; the incremental borrowing rate used in discounting of lease liabilities; the fair value of indemnities provided to customers and other parties; and income taxes and tax valuation allowances. Segment Information As a result of classification of the C&I Solutions business as discontinued operations, we now operate in a single operating segment, providing solar power systems and services to residential customers. While our chief executive officer, as the chief operating decision maker (“CODM”), reviews financial information by different functions and revenue streams, he considers the business on a consolidated basis for purposes of allocating resources and reviewing overall business performance. Summary of Selected Significant Accounting Policies The following significant accounting policies are updates to our significant accounting policies from our Annual Report on Form 10-K for the fiscal year ended January 2, 2022. Refer to our Annual Report on Form 10-K for the fiscal year ended January 2, 2022 for the full list of our significant accounting policies. There have been no other material changes to our significant accounting policies except as disclosed below. Retail installment contract receivables, net In the fourth quarter of fiscal 2021, we launched SunPower FinancialTM, with an objective to make renewable energy affordable for more homeowners and increase access to underserved populations by offering a new line of financial products featuring expanded eligibility. The offering includes entering into a retail installment contract, together with a sale of the solar power system, offering a long-term loan to our customers at affordable rates to finance their purchase. These residential installment contracts allow us to extend credit to the customers to pay for the solar power systems they purchased, on an installment basis, with a term of typically 20 - 25 years. Revenue from the sale of solar power systems underlying these retail installment contracts is recognized similar to other contracts, when the solar power system is fully installed and final permit is received from the authority having jurisdiction, as we deem our performance obligation under the contract to be complete at such time, and the customer retains the significant risks and rewards of ownership of the solar power system. Further, in accordance with ASC 606, Revenue from Contracts with Customers, given the long-term nature of these receivables, a significant financing component is deemed to exist. We adjust the transaction price to quantify and defer the significant financing component at contract inception, using the discount rate that would be reflective of a separate financing transaction between the entity and its customer at contract inception. The significant financing component amount is deferred and recognized as revenue over the contract term. We recognize the interest income as revenue given the contracts are entered into in connection with the sales of our solar power systems and within our ordinary business activities. As of April 3, 2022, the receivables are classified within current and non-current assets, based on the underlying contractual payment terms, as “accounts receivable, net” and “other long-term assets” on our condensed consolidated balance sheet. We are actively looking to refinance the contracts with several third-party financial institutions. Recently Adopted Accounting Pronouncements In August 2020, the Financial Accounting Standards Board (“FASB”) issued ASU 2020-06, Debt—Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging—Contracts in Entity’s Own Equity (Subtopic 815-40)—Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity. The amendment reduces the number of accounting models used for convertible debt instruments and convertible preferred stock, which results in fewer embedded conversion features separately recognized from the host contracts. ASU 2020-06 is effective no later than the first quarter of fiscal 2022. Early adoption is permitted no earlier than the first quarter of fiscal 2021, and the ASU should be applied retrospectively. We adopted the ASU during the first quarter of fiscal 2022. The adoption did not have any impact on our consolidated financial statements and related disclosures.