Equity Investments - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 28, 2020	Jun. 28, 2020	Jun. 30, 2019	Dec. 29, 2019	Sep. 29, 2019
Schedule of Equity Method Investments [Line Items]
Equity method investments	$ 292,235	$ 292,235		$ 226,602
Proceeds from sale of equity investment and return of capital by an unconsolidated investee		46,149	$ 0
Variable Interest Entity, Primary Beneficiary
Schedule of Equity Method Investments [Line Items]
Revenue	2,800	3,500
SunStrong Partners
Schedule of Equity Method Investments [Line Items]
Proceeds from sale of equity investment and return of capital by an unconsolidated investee	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 and return of capital by an unconsolidated investee	7,200
SunStrong Capital Holdings
Schedule of Equity Method Investments [Line Items]
Proceeds from sale of equity investment and return of capital by an unconsolidated investee	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 and return of capital by an unconsolidated investee	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 and return of capital by an unconsolidated investee	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 and return of capital by an unconsolidated investee	$ 7,700