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STOCKHOLDERS' EQUITY - Stock Employee Compensation Trust (Details) - Variable Interest Entity, Primary Beneficiary - Common Stock - USD ($)
$ / shares in Units, $ in Millions
 12 Months Ended
Dec. 28, 2017
Aug. 03, 2016
Dec. 31, 2017
Dec. 27, 2017
Class of Stock [Line Items]        
Shares sold during the period (in shares)   2,500,000 2,500,000  
Price per share sold to trust (in usd per share)     $ 21.45  
Proceeds from sale of equity   $ 53.6 $ 53.6  
Number of shares repurchased (in shares) 2,500,000      
Share price of share repurchased (in dollars per share) $ 21.00      
Value of shares repurchased $ 52.5      
Proceeds used for funding benefit plan obligations $ 2.7      
Voting common stock allocated to funding benefit plan obligations (in shares) 126,517      
Portion of termination proceeds used to satisfy and terminate promissory note obligations $ 49.8      
Outstanding principal balance including accrued interest       $ 50.9