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
Beginning Balance at Dec. 31, 2020	$ 172.5	$ 23.2	$ 2,093.0	$ 2,400.7	$ (3,380.9)	$ (963.5)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Effect of share-based incentive compensation	30.2		30.2
Stock issued for profit sharing contribution paid in stock	28.0		0.2		27.8
Repurchases of common stock	(401.6)				(401.6)
Unrecognized pension items, net of taxes	35.0					35.0
Foreign currency translation adjustments	(38.8)					(38.8)
Unrealized gain (loss) on derivative instruments, net of taxes	33.4					33.4
Net earnings	506.8			506.8
Dividends on common stock	(116.8)			(116.8)
Ending Balance at Dec. 31, 2021	248.7	23.2	2,123.4	2,790.7	(3,754.7)	(933.9)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Effect of share-based incentive compensation	25.1	0.1	25.0
Stock issued for profit sharing contribution paid in stock	22.7		6.9		15.8
Repurchases of common stock	(280.2)				(280.2)
Unrecognized pension items, net of taxes	11.2					11.2
Foreign currency translation adjustments	(77.0)					(77.0)
Unrealized gain (loss) on derivative instruments, net of taxes	20.9					20.9
Net earnings	491.6			491.6
Dividends on common stock	(118.9)			(118.9)
Ending Balance 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	12.8	0.1	12.7
Retirement of treasury shares		(8.0)	(739.4)	(2,892.4)	3,639.8
Stock issued for profit sharing contribution paid in stock	23.9		0.9		23.0
Repurchases of common stock	(80.1)				(80.1)
Unrecognized pension items, net of taxes	(20.1)					(20.1)
Foreign currency translation adjustments	66.9					66.9
Unrealized gain (loss) on derivative instruments, net of taxes	(23.5)					(23.5)
Net earnings	341.6			341.6
Dividends on common stock	(116.1)			(116.1)
Ending Balance at Dec. 31, 2023	$ 549.5	$ 15.4	$ 1,429.5	$ 496.5	$ (436.4)	$ (955.5)