Reporting Segment And Geographic Information (Schedule of Components Of Property and Equipment) (Details) - USD ($) $ in Millions	Dec. 29, 2023	Dec. 30, 2022
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	$ 202.5	$ 219.0
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	153.8	157.7
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	28.0	40.3
Asia Pacific and Rest of World
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	$ 20.7	$ 21.0