Leases (Operating Lease Expenses) (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 01, 2021	Jan. 03, 2020
Leases [Abstract]
Operating lease expense	$ 38.1	$ 38.3
Short-term lease expense and other	15.7	18.4
Total lease expense	$ 53.8	$ 56.7