Other Financial Information - Summary of Components for Certain Captions (Details) - USD ($) $ in Millions		12 Months Ended
		Jan. 02, 2022	Jan. 03, 2021	Dec. 29, 2019
Joint Business operating expense		$ 47.5	$ 35.3	$ 48.8
Quidel acquisition-related costs		7.0	0.0	0.0
Other(1)	[1]	6.2	5.2	9.3
Total other operating expense, net		47.5	35.3	48.8
Joint Business
Joint Business operating expense		34.3	30.1	39.5
Total other operating expense, net		$ 34.3	$ 30.1	$ 39.5

[1] This line item includes Carlyle management fees, allowance for credit losses, restructuring costs (credits), settlement proceeds on disputed matters and other operating income and expenses. See Note 20–Related Party Transactions for additional detail on Carlyle management fees.