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DEBT AND CAPITAL LEASES - Debt issued and Capital Lease Obligations (Details) - USD ($)
$ in Millions
1 Months Ended 12 Months Ended
May 31, 2015
Dec. 30, 2017
Dec. 31, 2016
Jan. 02, 2016
Debt and Capital Leases        
Interest costs   $ 67.9 $ 63.5 $ 63.5
Interest costs capitalized   4.9 3.6 $ 3.0
Fair value of debt   1,600.0 1,310.0  
Capital Lease Obligations        
Capital Lease Obligations   25.0 $ 25.2  
Mentor lease facility        
Capital Lease Obligations        
Term of lease financing for commercial facility 10 years      
Capital Lease Obligations   20.0    
Capital Lease Obligations, Noncurrent   18.0    
Capital Lease Obligations, Current   $ 2.0