Organization and Summary of Significant Accounting Policies (Policies)	3 Months Ended
Apr. 03, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Principles of Consolidation	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.
Fiscal Periods	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	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	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.
Retail installment contract receivables, net	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 and Recent Accounting Pronouncements Not Yet Adopted	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.

Organization and Summary of Significant Accounting Policies (Policies)

3 Months Ended

Apr. 03, 2022

Organization, Consolidation and Presentation of Financial Statements [Abstract]

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.

Fiscal Periods

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.

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 and Recent Accounting Pronouncements Not Yet Adopted

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.