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Restructuring (Narrative) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 30, 2017
Dec. 31, 2016
Jan. 02, 2016
Restructuring and Related Activities [Abstract]      
Expected total restructuring charges $ 150,000    
Restructuring charges 48,171 $ 27,778 $ 24,400
Restructuring and related cost, expected cost remaining $ 50,000