Equity Investments - Unconsolidated VIEs (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 27, 2020	Sep. 27, 2020	Sep. 29, 2019	Dec. 29, 2019	Jun. 30, 2019
Schedule of Equity Method Investments [Line Items]
Equity method investments	$ 342,018	$ 342,018		$ 192,209
Proceeds from sale of equity investment		119,439	$ 42,957
Cash contributions	100
SunStrong Partners
Schedule of Equity Method Investments [Line Items]
Proceeds from sale of equity investment	7,200
SunStrong Partners | Variable Interest Entity, Not Primary Beneficiary
Schedule of Equity Method Investments [Line Items]
Equity method investments					$ 9,500
Ownership percentage					10.00%
VIE maximum exposure loss	250,000	250,000
Proceeds from sale of equity investment		7,200
SunStrong Capital Holdings
Schedule of Equity Method Investments [Line Items]
Proceeds from sale of equity investment	500
SunStrong Capital Holdings | Variable Interest Entity, Not Primary Beneficiary
Schedule of Equity Method Investments [Line Items]
Ownership percentage					47.50%
Proceeds from sale of equity investment		500
Hannon Armstrong | Variable Interest Entity, Not Primary Beneficiary
Schedule of Equity Method Investments [Line Items]
Ownership percentage					45.10%
SunPower Corp | Variable Interest Entity, Not Primary Beneficiary
Schedule of Equity Method Investments [Line Items]
Ownership percentage					44.90%
Total equity investment with fair value option
Schedule of Equity Method Investments [Line Items]
Proceeds from sale of equity investment		7,700
Total equity investment with fair value option | Variable Interest Entity, Not Primary Beneficiary
Schedule of Equity Method Investments [Line Items]
Proceeds from sale of equity investment		7,700
Ultralight 2 | Variable Interest Entity, Not Primary Beneficiary
Schedule of Equity Method Investments [Line Items]
Cash contributions	100
Accounts receivable	9,200	9,200
Customer advances	$ 5,400	$ 5,400