Segment Disclosures - Summary of Revenue From Services by Geographic Area (Details) - Service - USD ($) $ in Millions	12 Months Ended
	Jan. 03, 2021	Dec. 29, 2019	Dec. 30, 2018
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue from services	$ 4,516.0	$ 5,355.6	$ 5,513.9
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue from services	3,260.2	3,892.5	3,930.0
Foreign
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue from services	$ 1,255.8	$ 1,463.1	$ 1,583.9