CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (unaudited) - USD ($) $ in Millions	Total	Common Stock	Additional Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive Loss	Treasury Stock, Common
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock, shares issued (in shares)		96,431,604
Treasury Stock, Common, Shares						(5,353,228)
Balance at Dec. 31, 2022	$ 992.9	$ 1.0	$ 1,665.5	$ (448.2)	$ (122.1)	$ (103.3)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) earnings	8.4
Stock Repurchased During Period, Value	(12.5)					(12.5)
Net (loss) earnings	8.4
Other comprehensive (loss) earnings, net of tax	(12.7)				(12.7)
Stock-based compensation expense	14.9		14.9
Stock Issued During Period, Shares, New Issues		193,241
Stock Issued During Period, Value, Stock Options Exercised	1.6	$ 0.0	1.6
Restricted Stock, Shares Issued Net of Shares for Tax Withholdings		604,008
Balance at Jun. 30, 2023	986.5	$ 1.0	1,675.9	(439.8)	(134.8)	$ (115.8)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock Repurchased During Period, Shares						(733,438)
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent	(0.8)
Restricted Stock, Value, Shares Issued Net of Tax Withholdings	(6.1)		(6.1)
Common stock, shares issued (in shares)		97,146,487
Treasury Stock, Common, Shares						(5,786,987)
Balance at Mar. 31, 2023	987.4	$ 1.0	1,668.7	(453.4)	(118.1)	$ (110.8)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) earnings	13.6
Stock Repurchased During Period, Value						(5.0)
Net (loss) earnings	13.6
Other comprehensive (loss) earnings, net of tax	(16.7)				(16.7)
Stock-based compensation expense	7.1		7.1
Stock Issued During Period, Shares, New Issues		10,505
Stock Issued During Period, Value, Stock Options Exercised	0.2	$ 0.0	0.2
Restricted Stock, Shares Issued Net of Shares for Tax Withholdings		71,861
Balance at Jun. 30, 2023	986.5	$ 1.0	1,675.9	(439.8)	(134.8)	$ (115.8)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock Repurchased During Period, Shares						(299,679)
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent	(0.5)
Restricted Stock, Value, Shares Issued Net of Tax Withholdings	$ (0.1)		(0.1)
Common stock, shares issued (in shares)		97,228,853
Treasury Stock, Common, Shares						(6,086,666)
Common stock, shares issued (in shares)	97,297,703	97,297,703
Treasury Stock, Common, Shares	8,204,832					(8,204,832)
Balance at Dec. 31, 2023	$ 1,034.1	$ 1.0	1,689.9	(375.8)	(129.8)	$ (151.2)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) earnings	(256.8)			(256.8)
Stock Repurchased During Period, Value	(25.0)					(25.0)
Net (loss) earnings	(256.8)
Other comprehensive (loss) earnings, net of tax	(7.6)				(7.6)
Stock-based compensation expense	14.1		14.1
Stock Issued During Period, Shares, New Issues		10,325
Stock Issued During Period, Value, Stock Options Exercised	0.2	$ 0.0	0.2
Restricted Stock, Shares Issued Net of Shares for Tax Withholdings		723,135
Balance at Jun. 30, 2024	753.0	$ 1.0	1,698.3	(632.6)	(137.4)	$ (176.3)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock Repurchased During Period, Shares						(1,432,989)
Excise Tax on Repurchased Shares	0.1					$ 0.1
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent	(0.2)
Restricted Stock, Value, Shares Issued Net of Tax Withholdings	(5.9)		(5.9)
Common stock, shares issued (in shares)		97,949,177
Treasury Stock, Common, Shares						(8,204,832)
Balance at Mar. 31, 2024	1,033.9	$ 1.0	1,690.8	(373.3)	(133.4)	$ (151.2)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) earnings	(259.3)			(259.3)
Stock Repurchased During Period, Value	(25.0)					(25.0)
Net (loss) earnings	(259.3)
Other comprehensive (loss) earnings, net of tax	(4.0)				(4.0)
Stock-based compensation expense	7.4		7.4
Stock Issued During Period, Value, Stock Options Exercised	0.2
Restricted Stock, Shares Issued Net of Shares for Tax Withholdings		71,661
Balance at Jun. 30, 2024	753.0	$ 1.0	1,698.3	$ (632.6)	$ (137.4)	$ (176.3)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock Repurchased During Period, Shares						(1,432,989)
Excise Tax on Repurchased Shares	0.1					$ 0.1
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent	0.1
Restricted Stock, Value, Shares Issued Net of Tax Withholdings	$ (0.1)		$ (0.1)
Common stock, shares issued (in shares)	98,031,163	98,031,163
Treasury Stock, Common, Shares	9,637,821					(9,637,821)