Earnings (Loss) Per Share - Common Stock Reconciliation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2023	Jan. 01, 2023	Jan. 02, 2022
Earnings Per Share [Abstract]
Net earnings (loss)	$ 36.4	$ (62.5)	$ 156.1
Less: Earnings allocated to participating securities, basic	(0.7)	0.0	(1.4)
Less: Earnings allocated to participating securities, diluted	(0.7)	0.0	(1.4)
Net earnings (loss) available to common shareholders, basic	35.7	(62.5)	154.7
Net earnings (loss) available to common shareholders, diluted	$ 35.7	$ (62.5)	$ 154.7
Average common shares outstanding (millions):
Basic (in shares)	35.9	38.1	39.4
Dilutive share awards (in shares)	0.4	0.0	0.1
Diluted (in shares)	36.3	38.1	39.5
Basic earnings (loss) per share on common stock (in dollars per share)	$ 0.99	$ (1.64)	$ 3.93
Diluted earnings (loss) per share on common stock (in dollars per share)	$ 0.98	$ (1.64)	$ 3.91