Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Millions	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Common Stock in Treasury	Accumulated Other Comprehensive Loss, Net of Taxes
Balance at beginning of period at Dec. 31, 2022	$ 344.1	$ 23.3	$ 2,155.3	$ 3,163.4	$ (4,019.1)	$ (978.8)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Effect of share-based incentive compensation	(3.3)	0.1	(3.4)
Stock issued for profit sharing contribution paid in stock	23.9		0.9		23.0
Repurchases of common stock	(79.9)				(79.9)
Recognition of pension items, net of taxes	1.3					1.3
Foreign currency translation adjustments	36.6					36.6
Unrealized gain (loss) on derivative instruments, net of taxes	(8.3)					(8.3)
Net earnings	61.9			61.9
Dividends on common stock	(29.8)			(29.8)
Balance at end of period at Mar. 31, 2023	346.5	23.4	2,152.8	3,195.5	(4,076.0)	(949.2)
Balance at beginning of period at Dec. 31, 2023	549.5	15.4	1,429.5	496.5	(436.4)	(955.5)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Effect of share-based incentive compensation	0.7	0.0	0.7
Stock issued for profit sharing contribution paid in stock	25.4		(6.8)		32.2
Recognition of pension items, net of taxes	0.9					0.9
Foreign currency translation adjustments	(40.4)					(40.4)
Unrealized gain (loss) on derivative instruments, net of taxes	9.8					9.8
Net earnings	82.0			82.0
Dividends on common stock	(29.6)			(29.6)
Balance at end of period at Mar. 31, 2024	$ 598.3	$ 15.4	$ 1,423.4	$ 548.9	$ (404.2)	$ (985.2)