Earnings (Loss) Per Share - Components of Basic and Diluted Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Numerator:
Net income (loss)	$ 47.0	$ (1,118.6)	$ (100.2)
Denominator:
Weighted-average common shares outstanding used in basic earnings per share (in shares)	168.0	172.2	166.9
Incremental common shares from:
Assumed exercise of dilutive options and vesting of dilutive restricted stock units and performance stock units (in shares)	1.2	0.0	0.0
Weighted average common shares outstanding used in diluted earnings (loss) per share (in shares)	169.2	172.2	166.9
Earnings (loss) per share:
Earnings (Loss) - basic (in USD per share)	$ 0.28	$ (6.50)	$ (0.60)
Earnings (Loss) - diluted (in USD per share)	$ 0.28	$ (6.50)	$ (0.60)