Transactions with Total and Total S.A. - Affiliation Agreement (Details) - USD ($) $ in Thousands		1 Months Ended	3 Months Ended		6 Months Ended		12 Months Ended
	Mar. 04, 2019	Dec. 29, 2019	Jun. 28, 2020	Jun. 30, 2019	Jun. 28, 2020	Jun. 30, 2019	Dec. 29, 2019
Related Party Transaction [Line Items]
Revenue			$ 352,914	$ 436,281	$ 802,104	$ 784,506
Solar power systems, components, and other
Related Party Transaction [Line Items]
Revenue		$ 6,200	347,655	$ 426,841	$ 791,588	$ 768,283
Total
Related Party Transaction [Line Items]
Ownership after sale of stock, percentage					52.00%
Revenue	$ 3,200	$ 38,400					$ 6,400
Total | Solar power systems, components, and other
Related Party Transaction [Line Items]
Revenue			$ 20,000		$ 31,300
Standstill Agreements | Total
Related Party Transaction [Line Items]
Ownership after sale of stock, percentage					15.00%
Limitations on transfer of outstanding shares, percentage					0.40
Standstill Agreements | Total | Maximum
Related Party Transaction [Line Items]
Percentage of voting interests acquired in business acquisition			100.00%		100.00%