Reporting Segment And Geographic Information (Schedule Of Long-Lived Assets) (Details) - USD ($) $ in Millions	Jan. 01, 2021	Jan. 03, 2020
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	$ 251.8	$ 241.4
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	200.3	192.7
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	41.0	38.6
Asia Pacific and Rest of World
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	$ 10.5	$ 10.1