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Earnings (Loss) Per Share (Tables)
12 Months Ended
Jan. 01, 2023
Earnings Per Share [Abstract]  
Common Stock Reconciliation of Basic and Diluted Earnings Per Share
The reconciliation of basic earnings (loss) per share on common stock for 2022, 2021 and 2020 follows (in millions of dollars except per share data):
 202220212020
Net earnings (loss)$(62.5)$156.1 $(72.0)
Less: Earnings allocated to participating securities— (1.4)— 
Net earnings (loss) available to common shareholders$(62.5)$154.7 $(72.0)
Average common shares outstanding (millions):
Basic38.1 39.4 39.3 
Dilutive share awards— 0.1 — 
Diluted38.1 39.5 39.3 
Basic earnings (loss) per share$(1.64)$3.93 $(1.83)
Diluted earnings (loss) per share$(1.64)$3.91 $(1.83)