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STOCKHOLDERS' EQUITY - Stock Employee Compensation Trust (Details) - Variable Interest Entity, Primary Beneficiary - Common Stock - USD ($)
$ / shares in Units, $ in Millions
Dec. 28, 2017
Aug. 03, 2016
Class of Stock [Line Items]    
Shares sold during the period (in shares)   2,500,000
Price per share sold to trust (in usd per share)   $ 21.45
Proceeds from sale of equity   $ 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