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Earnings 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
Jan. 03, 2021
Dec. 29, 2019
Dec. 30, 2018
Earnings Per Share [Abstract]      
Net earnings (loss) $ (72.0) $ 112.4 $ 22.9
Less: Earnings allocated to participating securities 0.0 (1.1) (0.2)
Net earnings (loss) available to common shareholders $ (72.0) $ 111.3 $ 22.7
Average common shares outstanding (millions):      
Basic (in shares) 39.3 39.1 38.8
Dilutive share awards (in shares) 0.0 0.1 0.3
Diluted (in shares) 39.3 39.2 39.1
Basic earnings (loss) per share on common stock (in dollars per share) $ (1.83) $ 2.85 $ 0.59
Diluted earnings (loss) per share on common stock (in dollars per share) $ (1.83) $ 2.84 $ 0.58