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Business Segments - Company's Long-Lived Assets (Primarily Property, Plant and Equipment) (Detail) - USD ($)
$ in Millions
Dec. 30, 2017
Dec. 31, 2016
Jan. 02, 2016
Segment Reporting Information [Line Items]      
Long-lived assets $ 136.7 $ 146.1 $ 131.6
United States [Member]      
Segment Reporting Information [Line Items]      
Long-lived assets 122.4 131.4 117.7
Foreign [Member]      
Segment Reporting Information [Line Items]      
Long-lived assets $ 14.3 $ 14.7 $ 13.9