Consolidated Statements of Changes in Equity - USD ($) shares in Thousands, $ in Millions	Total	Common Stock	Treasury Stock	Additional Paid-In Capital	Retained Earnings (Accumulated Deficit)	Accumulated Other Comprehensive Income	Noncontrolling Interests
Beginning balance (in shares) at Dec. 31, 2020		168,500
Beginning balance at Dec. 31, 2020	$ 191.7	$ 0.0	$ 0.0	$ 7.6	$ (13.6)	$ 193.8	$ 3.9
Treasury stock, beginning balance (in shares) at Dec. 31, 2020			0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	413.0				413.0
Dividends on common stock ($0.025###per share)	(12.7)				(12.7)
Other comprehensive loss, net of income taxes	(12.1)					(12.1)
Stock-based compensation expense	$ 25.5			25.5
Common stock-based award activity, net of shares for tax withholding (in shares)	400	700
Common stock-based award activity, net of shares for tax withholding	$ 3.4			3.4
Acquisition of noncontrolling interest	(1.9)			(2.0)			0.1
Separation-related adjustments and other	(33.0)			(33.0)
Change in noncontrolling interests and other	(0.2)						(0.2)
Ending balance (in shares) at Dec. 31, 2021		169,200
Ending balance at Dec. 31, 2021	573.7	$ 0.0	$ 0.0	1.5	386.7	181.7	3.8
Treasury stock, ending balance (in shares) at Dec. 31, 2021			0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	401.3				401.3
Dividends on common stock ($0.025###per share)	(15.9)				(15.9)
Other comprehensive loss, net of income taxes	(75.6)
Stock-based compensation expense	$ 24.3			23.9			0.4
Common stock-based award activity, net of shares for tax withholding (in shares)	100	500
Common stock-based award activity, net of shares for tax withholding	$ (1.6)			(1.6)
Separation-related adjustments and other	(328.0)
Purchase of treasury stock (in shares)			13,700
Purchase of treasury stock			$ (328.0)
Change in noncontrolling interests and other	$ 1.3			3.8	(1.3)		(1.2)
Ending balance (in shares) at Dec. 31, 2022	169,700	169,700
Ending balance at Dec. 31, 2022	$ 579.5	$ 0.0	$ (328.0)	27.6	770.8	106.1	3.0
Treasury stock, ending balance (in shares) at Dec. 31, 2022	13,700		13,700
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	$ 376.9				376.9
Dividends on common stock ($0.025###per share)	(15.6)				(15.6)
Other comprehensive loss, net of income taxes	(1.2)
Stock-based compensation expense	$ 31.5			27.4			4.1
Common stock-based award activity, net of shares for tax withholding (in shares)	500	1,100
Common stock-based award activity, net of shares for tax withholding	$ 2.2			2.2
Separation-related adjustments and other	(75.4)
Purchase of treasury stock (in shares)			2,800
Purchase of treasury stock			$ (75.4)
Change in noncontrolling interests and other	$ (2.3)			(0.4)			(1.9)
Ending balance (in shares) at Dec. 31, 2023	170,800	170,800
Ending balance at Dec. 31, 2023	$ 895.6	$ 0.0	$ (403.4)	$ 56.8	$ 1,132.1	$ 104.9	$ 5.2
Treasury stock, ending balance (in shares) at Dec. 31, 2023	16,500		16,500