Valuation And Qualifying Accounts (Details) - Allowance, Doubtful Accounts [Member] - USD ($) $ in Millions	12 Months Ended
	Jan. 03, 2020	Dec. 28, 2018	Dec. 29, 2017
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of period	$ 4.6	$ 3.6	$ 5.0
Acquired allowance	0.2	1.6	0.3
Bad debt expense	6.5	3.4	1.2
Write-offs, net of recoveries	(5.4)	(4.0)	(2.9)
Balance at end of period	$ 5.9	$ 4.6	$ 3.6