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, 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	4.0	0.1	3.9
Stock issued for profit sharing contribution paid in stock	22.7		6.9		15.8
Repurchases of common stock	(250.2)				(250.2)
Recognition of pension items, net of taxes	2.1					2.1
Foreign currency translation adjustments	(58.8)					(58.8)
Unrealized (loss) gain on derivative instruments, net of taxes	28.3					28.3
Net earnings	263.1			263.1
Dividends on common stock	(60.2)			(60.2)
Balance at end of period at Jun. 30, 2022	199.7	23.3	2,134.2	2,993.6	(3,989.1)	(962.3)
Balance at beginning of period at Mar. 31, 2022	190.4	23.3	2,122.9	2,909.3	(3,939.0)	(926.1)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Effect of share-based incentive compensation	11.3		11.3
Repurchases of common stock	(50.1)				(50.1)
Recognition of pension items, net of taxes	1.3					1.3
Foreign currency translation adjustments	(62.3)					(62.3)
Unrealized (loss) gain on derivative instruments, net of taxes	24.8					24.8
Net earnings	113.9			113.9
Dividends on common stock	(29.6)			(29.6)
Balance at end of period at Jun. 30, 2022	199.7	23.3	2,134.2	2,993.6	(3,989.1)	(962.3)
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	0.2	0.1	0.1
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	2.1					2.1
Foreign currency translation adjustments	32.5					32.5
Unrealized (loss) gain on derivative instruments, net of taxes	(13.4)					(13.4)
Net earnings	161.0			161.0
Dividends on common stock	(58.1)			(58.1)
Balance at end of period at Jun. 30, 2023	412.4	23.4	2,156.3	3,266.3	(4,076.0)	(957.6)
Balance at beginning of period at Mar. 31, 2023	346.5	23.4	2,152.8	3,195.5	(4,076.0)	(949.2)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Effect of share-based incentive compensation	3.5	0.0	3.5
Recognition of pension items, net of taxes	0.8					0.8
Foreign currency translation adjustments	(4.1)					(4.1)
Unrealized (loss) gain on derivative instruments, net of taxes	(5.1)					(5.1)
Net earnings	99.1			99.1
Dividends on common stock	(28.3)			(28.3)
Balance at end of period at Jun. 30, 2023	$ 412.4	$ 23.4	$ 2,156.3	$ 3,266.3	$ (4,076.0)	$ (957.6)