Segment Reporting - Revenues by Geographic Area (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Jan. 01, 2022	Jan. 02, 2021
Schedule Of Revenues From External Customers [Line Items]
Total	$ 2,215.1	$ 2,073.3	$ 1,953.5
United States
Schedule Of Revenues From External Customers [Line Items]
Total	1,620.5	1,493.7	1,429.6
United Kingdom
Schedule Of Revenues From External Customers [Line Items]
Total	150.9	157.8	142.2
Canada
Schedule Of Revenues From External Customers [Line Items]
Total	65.8	69.9	64.1
All other countries
Schedule Of Revenues From External Customers [Line Items]
Total	$ 377.9	$ 351.9	$ 317.6