CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY - USD ($) $ in Millions	Total	Amount	Treasury Stock [Member]	Treasury Stock [Member] Convertible Notes Due Twenty Twenty One [Member] Convertible Debt	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Additional Paid-in Capital [Member]	Additional Paid-in Capital [Member] Convertible Notes Due Twenty Twenty One [Member] Convertible Debt
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock, shares issued (in shares)		91,701,745
Treasury Stock, Shares			0
Balance at Dec. 31, 2019	$ 1,288.5	$ 0.9	$ 0.0		$ (112.0)	$ (175.1)	$ 1,574.7
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) earnings	6.6					6.6
Other Comprehensive Income (Loss), Net of Tax	11.5				11.5
Stock Repurchased During Period, Value			$ 16.2
Stock Repurchased During Period, Shares			(1,078,363)
Exercise of convertible note hedges	17.3						17.3
Stock Issued During Period, Shares, New Issues		141,336
Exercise of stock options	1.9						1.9
Restricted Stock, Shares Issued Net of Shares for Tax Withholdings		846,831
Balance at Dec. 31, 2020	1,303.5	$ 0.9	$ (16.2)		(100.5)	(168.5)	1,587.8
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Restricted Stock, Value, Shares Issued Net of Tax Withholdings	(6.1)						(6.1)
Common stock, shares issued (in shares)		92,689,912
Treasury Stock, Shares			(1,078,363)
Net (loss) earnings	150.4					150.4
Other Comprehensive Income (Loss), Net of Tax	0.1				0.1
Stock Repurchased During Period, Value			$ 44.5
Stock Repurchased During Period, Shares			(2,139,413)
Exercise of convertible note hedges	32.1						32.1
Stock Issued During Period, Shares, New Issues		1,540,314
Exercise of stock options	25.6	$ 0.1					25.5
Stock Issued During Period, Value, Conversion of Convertible Securities	0.0		$ 5.9
Adjustments to Additional Paid in Capital, Convertible Debt with Conversion Feature							(5.9)
Stock Issued During Period, Shares, Conversion of Convertible Securities			363,579
Shares received from convertible note hedges				(363,601)
Exercise of convertible note hedges	0.0		$ 7.6					$ 7.6
Restricted Stock, Shares Issued Net of Shares for Tax Withholdings		882,552
Balance at Dec. 31, 2021	1,459.5	$ 1.0	$ (62.4)		(100.4)	(18.1)	1,639.4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Restricted Stock, Value, Shares Issued Net of Tax Withholdings	(7.7)						(7.7)
Retained Earnings (Accumulated Deficit)	$ (18.1)
Common stock, shares issued (in shares)	95,112,778	95,112,778
Treasury Stock, Shares	3,217,798		(3,217,798)
Net (loss) earnings	$ (430.1)					(430.1)
Other Comprehensive Income (Loss), Net of Tax	(21.7)				(21.7)
Stock Repurchased During Period, Value			$ 44.0
Stock Repurchased During Period, Shares			(2,339,045)
Exercise of convertible note hedges	28.6						28.6
Stock Issued During Period, Shares, New Issues		643,911
Exercise of stock options	7.5	$ 0.0					7.5
Shares Issued During Period, Value, Exercise of Warrants	0.0		$ 3.1
Shares Issued During Period, Shares, Exercise of Warrants			203,615
Adjustments to Additional Paid in Capital, Convertible Debt with Conversion Feature							3.1
Restricted Stock, Shares Issued Net of Shares for Tax Withholdings		674,915
Balance at Dec. 31, 2022	992.9	$ 1.0	$ (103.3)		$ (122.1)	$ (448.2)	1,665.5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Restricted Stock, Value, Shares Issued Net of Tax Withholdings	(6.9)						$ (6.9)
Retained Earnings (Accumulated Deficit)	$ (448.2)
Common stock, shares issued (in shares)	96,431,604	96,431,604
Treasury Stock, Shares	5,353,228		(5,353,228)