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Restructuring (Narrative) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 29, 2018
Dec. 30, 2017
Dec. 31, 2016
Restructuring and Related Activities [Abstract]      
Expected total restructuring charges $ 150,000    
Restructuring charges $ 46,630 $ 48,171 $ 27,778