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Earnings (Loss) Per Share - Reconciliation of Basic and Diluted Earnings Per Share (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended
Apr. 04, 2021
Mar. 29, 2020
Earnings Per Share [Abstract]    
Net earnings (loss) $ 25.6 $ (153.2)
Less: earnings allocated to participating securities (0.2) 0.0
Net earnings (loss) available to common shareholders $ 25.4 $ (153.2)
Average shares outstanding (millions):    
Basic (in shares) 39.3 39.2
Dilutive share awards (in shares) 0.2 0.0
Diluted (in shares) 39.5 39.2
Basic earnings (loss) per share on common stock (in dollars per share) $ 0.65 $ (3.91)
Diluted earnings (loss) per share on common stock (in dollars per share) $ 0.64 $ (3.91)