Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Numerator:
Net income (loss)	$ (73.6)	$ 8.1	$ (75.0)	$ 15.9
Denominator:
Weighted-average shares outstanding - basic (in shares)	18.4	18.6	18.4	18.6
Effect of dilutive shares (in shares)	0.0	0.0	0.0	0.0
Weighted-average shares outstanding - diluted (in shares)	18.4	18.6	18.4	18.6
Basic earnings (loss) per share (in dollars per share)	$ (4.00)	$ 0.44	$ (4.08)	$ 0.85
Diluted earnings (loss) per share (in dollars per share)	$ (4.00)	$ 0.44	$ (4.08)	$ 0.85
Anti-dilutive shares (in shares)	0.3	0.1	0.3	0.1