Segment Disclosures - Summary of Revenue From Services by Geographic Area (Details) - Service - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Jan. 01, 2023	Jan. 02, 2022
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue from services	$ 4,835.7	$ 4,965.4	$ 4,909.7
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue from services	3,555.8	3,671.5	3,513.4
Foreign
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue from services	$ 1,279.9	$ 1,293.9	$ 1,396.3