Equity Investments - Consolidated VIEs (Details)	Mar. 29, 2020 USD ($)	Dec. 29, 2019 USD ($)	Sep. 29, 2019 USD ($) MW
Variable Interest Entity [Line Items]
Debt face amount	$ 959,353,000	$ 1,045,966,000
SunPower Corp
Variable Interest Entity [Line Items]
Equity contributions by other parties		6,000,000.0
Hannon Armstrong
Variable Interest Entity [Line Items]
Equity contributions by other parties		$ 6,000,000.0
Solar Sail
Variable Interest Entity [Line Items]
Inventory financed | MW			200
Solar Sail | Hannon Armstrong
Variable Interest Entity [Line Items]
Debt face amount			$ 112,600,000