Earning (Loss) Per Share - Schedule of Calculation of Numerator and Denominator in Earning (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2025	Jun. 30, 2025	Mar. 31, 2025	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2025	Sep. 30, 2024
Numerator
Net earnings (loss)	$ 10.2	$ (0.1)	$ 5.8	$ (24.7)	$ (2.8)	$ (28.1)	$ 15.9	$ (55.6)
Denominator
Basic weighted average number of common shares outstanding for all classes of common shares (in shares)	47.5			47.8			47.7	47.6
Plus: effect of dilutive equity incentive instruments (in shares)	2.2			0.0			2.3	0.0
Diluted weighted average number of common shares outstanding for all classes of common shares (in shares)	49.7			47.8			50.0	47.6
Earnings (loss) per share
Basic (USD per share)	$ 0.21			$ (0.52)			$ 0.33	$ (1.17)
Diluted (USD per share)	0.21			(0.52)			0.32	(1.17)
Cash dividends paid per common share for all classes of common shares (USD per share)	$ 0.075	$ 0.075	$ 0.075	$ 0.050			$ 0.225	$ 0.150

Aggregate dividends paid during the period for each share of common stock outstanding.

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