Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands		3 Months Ended			9 Months Ended				12 Months Ended
		Sep. 27, 2020	Dec. 29, 2019	Sep. 29, 2019	Sep. 27, 2020		Sep. 29, 2019		Dec. 29, 2019
Cash flows from operating activities:
Net income		$ 45,114		$ (19,208)	$ 61,374		$ (13,699)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization					45,737		62,022
Non-cash restructuring charges					0		5,874
Stock-based compensation					18,788		18,927
Non-cash interest expense					5,495		7,468
Bad debt expense					998		1,319
Equity in losses of unconsolidated investees					586		2,050
Gain on equity investments with readily determinable fair value					(275,645)		(129,038)
Gain on retirement of convertible debt					(3,060)		0
Gain on sale of assets					0		(21,383)
Gain on business divestiture		0		0	(10,458)		(143,400)
Gain on sale of investments without determinable fair value					0		(17,275)
Deferred income taxes					1,639		500
Impairment of property, plant and equipment					0		777
Loss on sale and impairment of residential lease assets					815		36,709
Changes in operating assets and liabilities:
Accounts receivable					113,029		(47,029)
Contract assets					(22,771)		(18,107)
Inventories					(12,107)		(108,093)
Project assets					(11,202)		(9,238)
Prepaid expenses and other assets					(4,324)		1,482
Operating lease right-of-use assets					9,898		6,219
Long-term financing receivables, net					0		(473)
Advances to suppliers					16,296		33,292
Accounts payable and other accrued liabilities					(75,141)		64,009
Contract liabilities					(53,818)		8,127
Operating lease liabilities					(8,642)		(7,202)
Net cash used in operating activities					(202,513)		(266,162)
Cash flows from investing activities:
Purchases of property, plant and equipment					(13,174)		(35,100)
Cash paid for solar power systems					(5,394)		(51,826)
Proceeds from business divestiture, net of de-consolidated cash					(140,132)	[1]	0
Proceeds from business divestiture, net of cash3	[2]				15,418		40,491
Proceeds from sale of equity investment					119,439		42,957
Proceeds from maturities of marketable securities					6,588		0
Purchases of marketable securities					(1,338)		0
Proceeds from sale of assets					0		39,970
Cash outflow from sale of residential lease portfolio					0		(16,397)
Proceeds from return of capital of equity investments with fair value option					7,724		0
Cash paid for investments in unconsolidated investees					0		(12,400)
Net cash provided by (used in) investing activities					(10,869)		7,695
Cash flows from financing activities:
Proceeds from bank loans and other debt					183,731		231,489
Repayment of bank loans and other debt					(183,070)		(209,095)
Proceeds from issuance of non-recourse residential and commercial financing, net of issuance costs					13,434		72,259
Repayment of non-recourse commercial and residential financing					(7,231)		(2,959)
Contributions from noncontrolling interests and redeemable noncontrolling interests attributable to residential projects					22		31,413
Distributions to noncontrolling interests and redeemable noncontrolling interests attributable to residential projects					(302)		(316)
Cash paid for repurchase of convertible debt					(95,178)		0
Proceeds from issuance of Maxeon Solar green convertible debt					200,000		0
Settlement of contingent consideration arrangement, net of cash received					2,245		(2,448)
Equity offering costs paid					(928)		0
Payment for prior business combination					0		(9,000)
Purchases of stock for tax withholding obligations on vested restricted stock					(8,455)		(4,657)
Net cash provided by financing activities					104,268		106,686
Effect of exchange rate changes on cash, cash equivalents, restricted cash and restricted cash equivalents					222		(1,247)
Net decrease in cash, cash equivalents, restricted cash and restricted cash equivalents					(108,892)		(153,028)
Cash, cash equivalents, restricted cash and restricted cash equivalents, beginning of period	[3]		$ 210,735		458,657		363,763		$ 363,763
Cash, cash equivalents, restricted cash and restricted cash equivalents, end of period	[3]	349,765	$ 458,657	210,735	349,765		210,735		$ 458,657
Non-cash transactions:
Costs of solar power systems sourced from existing inventory					0		29,206
Costs of solar power systems funded by liabilities					598		3,604
Property, plant and equipment acquisitions funded by liabilities					36		11,911
Right-of-use assets obtained in exchange for lease obligations		$ 8,362		$ 8,939	21,786	[4]	103,744	[4]
Derecognition financing obligations upon business divestitures					0		590,884
Assumption of liabilities in connection with business divestiture	[5]				9,056		0
Holdbacks in connection with business divestiture	[5]				7,199		2,425
Receivables in connection with sale of residential lease assets					0		8,043
Receivables in connection with sale of residential lease assets					0		69,076
Holdback related to sale of assets					0		$ 18,300
Cash received for spin-off					125,000
Deconsolidation, spin-off cash					265,100
De-consolidated cash amount					$ 600

[1] Amount for the nine months ended September 27, 2020 consists of $125 million of cash received from Maxeon Solar under the Separation and Distribution Agreement, net of de-consolidated cash of $265.1 million

[2] Amount for the nine months ended September 27, 2020 is net of de-consolidated cash of $0.6 million

[3] "Cash, cash equivalents, restricted cash and restricted cash equivalents" balance consisted of "cash and cash equivalents", "restricted cash and cash equivalents, current portion" and "restricted cash and cash equivalents, net of current portion" financial statement line items on the condensed consolidated balance sheets for the respective periods.

[4] Amounts for the nine months ended September 29, 2019 include the transition adjustment for the adoption of Accounting Standards Update ("ASU") No. 2016-02, Leases (Topic 842), as amended ("ASC 842") and additional Right-of-Use ("ROU") asset additions.

[5] See Note 5.