Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) $ in Millions	Total	Common Stock	Capital in Excess of Par Value	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock	Non-Controlling Interests
Balance, beginning of period at Dec. 31, 2023	$ 2,234.1	$ 1.2	$ 3,514.9	$ 3,813.0	$ (466.0)	$ (4,639.8)	$ 10.8
Balance, beginning of period (in shares) at Dec. 31, 2023		118,387,641
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) earnings	39.7			39.7
Other comprehensive gain loss	(29.5)				(29.5)
Issuances under equity plans	(10.3)					(10.3)
Issuances under equity plans (in shares)		420,210
Share-based compensation expense	7.5		7.5
Repurchases of common stock, including excise tax	(50.3)					(50.3)
Noncontrolling interest transactions	(3.5)		(3.7)				0.2
Balance, end of period at Mar. 31, 2024	2,187.7	$ 1.2	3,518.7	3,852.7	(495.5)	(4,700.4)	11.0
Balance, end of period (in shares) at Mar. 31, 2024		118,807,851
Balance, beginning of period at Dec. 31, 2023	2,234.1	$ 1.2	3,514.9	3,813.0	(466.0)	(4,639.8)	10.8
Balance, beginning of period (in shares) at Dec. 31, 2023		118,387,641
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) earnings	122.6
Other comprehensive gain loss	(3.9)
Balance, end of period at Sep. 30, 2024	2,177.7	$ 1.2	3,539.5	3,862.1	(469.9)	(4,756.8)	1.6
Balance, end of period (in shares) at Sep. 30, 2024		118,847,958
Balance, beginning of period at Mar. 31, 2024	2,187.7	$ 1.2	3,518.7	3,852.7	(495.5)	(4,700.4)	11.0
Balance, beginning of period (in shares) at Mar. 31, 2024		118,807,851
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) earnings	60.1			60.1
Other comprehensive gain loss	(4.9)				(4.9)
Issuances under equity plans	(0.2)		(0.1)			(0.1)
Issuances under equity plans (in shares)		36,195
Share-based compensation expense	7.5		7.5
Dividends	(73.5)			(73.5)
Repurchases of common stock, including excise tax	(27.0)					(27.0)
Noncontrolling interest transactions	(3.8)		(1.8)				(2.0)
Balance, end of period at Jun. 30, 2024	2,145.9	$ 1.2	3,524.3	3,839.3	(500.4)	(4,727.5)	9.0
Balance, end of period (in shares) at Jun. 30, 2024		118,844,046
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) earnings	22.8			22.8
Other comprehensive gain loss	30.5				30.5
Issuances under equity plans	(0.2)		(0.2)
Issuances under equity plans (in shares)		3,912
Share-based compensation expense	7.0		7.0
Repurchases of common stock, including excise tax	(29.3)					29.3
Noncontrolling interest transactions	1.0		8.4				(7.4)
Balance, end of period at Sep. 30, 2024	2,177.7	$ 1.2	3,539.5	3,862.1	(469.9)	(4,756.8)	1.6
Balance, end of period (in shares) at Sep. 30, 2024		118,847,958
Balance, beginning of period at Dec. 31, 2024	2,126.9	$ 1.2	3,546.1	3,812.3	(443.0)	(4,791.4)	1.7
Balance, beginning of period (in shares) at Dec. 31, 2024		118,853,620
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) earnings	5.6			5.6
Other comprehensive gain loss	(4.1)				(4.1)
Issuances under equity plans	(6.1)		(0.9)			(5.2)
Issuances under equity plans (in shares)		288,938
Share-based compensation expense	7.6		7.6
Repurchases of common stock, including excise tax	(25.4)					(25.4)
Noncontrolling interest transactions	0.4						0.4
Balance, end of period at Mar. 31, 2025	2,104.9	$ 1.2	3,552.8	3,817.9	(447.1)	(4,822.0)	2.1
Balance, end of period (in shares) at Mar. 31, 2025		119,142,558
Balance, beginning of period at Dec. 31, 2024	2,126.9	$ 1.2	3,546.1	3,812.3	(443.0)	(4,791.4)	1.7
Balance, beginning of period (in shares) at Dec. 31, 2024		118,853,620
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) earnings	(43.5)
Other comprehensive gain loss	(14.1)
Balance, end of period at Sep. 30, 2025	2,011.4	$ 1.2	3,565.5	3,735.5	(457.1)	(4,834.3)	0.6
Balance, end of period (in shares) at Sep. 30, 2025		119,161,655
Balance, beginning of period at Mar. 31, 2025	2,104.9	$ 1.2	3,552.8	3,817.9	(447.1)	(4,822.0)	2.1
Balance, beginning of period (in shares) at Mar. 31, 2025		119,142,558
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) earnings	(67.1)			(67.1)
Other comprehensive gain loss	(3.8)				(3.8)
Issuances under equity plans	0.2		0.4			(0.2)
Issuances under equity plans (in shares)		8,080
Share-based compensation expense	7.7		7.7
Dividends	(33.3)			(33.3)
Repurchases of common stock, including excise tax	(12.1)					(12.1)
Noncontrolling interest transactions	(1.3)						(1.3)
Balance, end of period at Jun. 30, 2025	1,995.2	$ 1.2	3,560.9	3,717.5	(450.9)	(4,834.3)	0.8
Balance, end of period (in shares) at Jun. 30, 2025		119,150,638
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net (loss) earnings	18.0			18.0
Other comprehensive gain loss	(6.2)				(6.2)
Issuances under equity plans	(0.3)		(0.3)
Issuances under equity plans (in shares)		11,017
Share-based compensation expense	4.9		4.9
Noncontrolling interest transactions	(0.2)						(0.2)
Balance, end of period at Sep. 30, 2025	$ 2,011.4	$ 1.2	$ 3,565.5	$ 3,735.5	$ (457.1)	$ (4,834.3)	$ 0.6
Balance, end of period (in shares) at Sep. 30, 2025		119,161,655