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, 2022	$ 2,458.1	$ 1.2	$ 3,484.2	$ 3,868.5	$ (458.7)	$ (4,447.9)	$ 10.8
Balance, beginning of period (in shares) at Dec. 31, 2022		118,028,009
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	77.8			77.8
Other comprehensive gain loss	7.1				7.1
Issuances under equity plans	(8.6)		1.3			(9.9)
Issuances under equity plans (in shares)		336,079
Share-based compensation expense	5.1		5.1
Repurchases of common stock, including excise tax	(30.3)					(30.3)
Noncontrolling interest transactions	0.2						0.2
Balance, end of period at Mar. 31, 2023	2,509.4	$ 1.2	3,490.6	3,946.3	(451.6)	(4,488.1)	11.0
Balance, end of period (in shares) at Mar. 31, 2023		118,364,088
Balance, beginning of period at Dec. 31, 2022	2,458.1	$ 1.2	3,484.2	3,868.5	(458.7)	(4,447.9)	10.8
Balance, beginning of period (in shares) at Dec. 31, 2022		118,028,009
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	143.0
Other comprehensive gain loss	(0.8)
Balance, end of period at Jun. 30, 2023	2,449.8	$ 1.2	3,497.3	3,938.4	(459.5)	(4,538.2)	10.6
Balance, end of period (in shares) at Jun. 30, 2023		118,364,942
Balance, beginning of period at Mar. 31, 2023	2,509.4	$ 1.2	3,490.6	3,946.3	(451.6)	(4,488.1)	11.0
Balance, beginning of period (in shares) at Mar. 31, 2023		118,364,088
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	65.2			65.2
Other comprehensive gain loss	(7.9)				(7.9)
Issuances under equity plans	(0.1)		(0.2)			0.1
Issuances under equity plans (in shares)		854
Share-based compensation expense	6.9		6.9
Dividends	(73.1)			(73.1)
Repurchases of common stock, including excise tax	(50.2)					(50.2)
Noncontrolling interest transactions	(0.4)						(0.4)
Balance, end of period at Jun. 30, 2023	2,449.8	$ 1.2	3,497.3	3,938.4	(459.5)	(4,538.2)	10.6
Balance, end of period (in shares) at Jun. 30, 2023		118,364,942
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 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 earnings	99.8
Other comprehensive gain loss	(34.4)
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
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 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