Reporting Segment And Geographic Information (Schedule Of Long-Lived Assets) (Details) - USD ($) $ in Millions	Jan. 03, 2020	Dec. 28, 2018
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, Net	$ 241.4	$ 212.9
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, Net	192.7	170.1
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, Net	38.6	34.2
Asia Pacific And Other Non-US Countries [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, Net	$ 10.1	$ 8.6