Business Segments - Company's Long-Lived Assets (Primarily Property, Plant and Equipment) (Detail) (USD $) In Millions, unless otherwise specified	Jan. 03, 2015	Dec. 28, 2013	Dec. 29, 2012
Segment Reporting Information [Line Items]
Long-lived assets	$ 136.8	$ 151.9	$ 151.0
United States [Member]
Segment Reporting Information [Line Items]
Long-lived assets	126.8	136.7	136.8
Foreign [Member]
Segment Reporting Information [Line Items]
Long-lived assets	$ 10.0	$ 15.2	$ 14.2