Earnings (Loss) per Share - Reconciliation of Numerator and Denominator of Basic and Diluted Earnings per Share Calculation and Anti-dilutive Share-based Awards (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Earnings Per Share Basic And Diluted [Line Items]
Basic	$ 3.33	$ 4.36	$ (0.76)
Diluted	$ 3.17	$ 4.14	$ (0.76)
Net earnings (loss)	$ 102.5	$ 145.9	$ (25.9)
Weighted average number of common shares outstanding	30.8	33.5	33.9
Dilutive awards	1.5	1.7	0.0
Diluted weighted average number of common shares outstanding	32.3	35.2	33.9
Total weighted average number of anti-dilutive share-based awards	0.0	0.0	1.2
Restricted stock units
Earnings Per Share Basic And Diluted [Line Items]
Total weighted average number of anti-dilutive share-based awards	0.0	0.0	0.4
Stock options
Earnings Per Share Basic And Diluted [Line Items]
Total weighted average number of anti-dilutive share-based awards	0.0	0.0	0.8