Income Taxes Income by Region (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Jan. 01, 2023	Jan. 02, 2022
Income Tax Disclosure [Abstract]
U.S.	$ 258.2	$ 394.3	$ 168.7
Non-U.S.	37.0	(39.7)	64.7
Income before income taxes	$ 295.2	$ 354.6	$ 233.4