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STOCK-BASED COMPENSATION - Narrative (Details)
$ / shares in Units, $ in Millions
8 Months Ended 12 Months Ended
Aug. 25, 2020
Jan. 02, 2022
USD ($)
$ / shares
shares
Jan. 03, 2021
plan
shares
Dec. 29, 2019
plan
shares
Aug. 26, 2020
shares
Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of plans | plan     2 2    
Restricted Stock Units (RSUs) And Performance Shares            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Weighted average grant date fair value (in USD per share) | $ / shares   $ 25.51        
Restricted Stock Units            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Fair value of restricted stock units vested | $   $ 14.5        
Unrecognized stock-based compensation | $   $ 14.8        
Unrecognized stock-based compensation, period for recognition   2 years 2 months 12 days        
Unvested shares (in shares)   1,069,000 1,158,000      
SunPower Plan            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Share-Based Compensation Arrangement By Share-based Payment Award Shares Replaced Due To Spin-Off         (2,100,000)  
2015 Plan            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Annual increase percentage         2.00% 3.00%
Number of shares available for grant (in shares)         6,000,000  
Shares withheld for tax withholding obligation (in shares)     100,000 200,000    
2015 Plan | Minimum            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Vesting period 3 years          
2015 Plan | Maximum            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Vesting period 4 years          
2020 Plan            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Annual increase percentage   3.00%        
Shares withheld for tax withholding obligation (in shares)   132,337 1,393      
Unvested shares (in shares)         1,200,000  
2020 Plan | Restricted Stock Units            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Vesting period   4 years