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, 2020	$ 2,453.6	$ 1.2	$ 3,402.5	$ 3,388.8	$ (397.3)	$ (3,954.2)	$ 12.6
Balance, beginning of period (in shares) at Dec. 31, 2020		117,555,991
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	62.0			62.0
Other comprehensive income (loss)	(40.5)				(40.5)
Issuances under equity plans	(3.6)		1.0			(4.6)
Issuances under equity plans (in shares)		169,192
Share-based compensation expense	7.5		7.5
Repurchases of common stock	(100.1)					(100.1)
Noncontrolling interest transactions	(1.5)						(1.5)
Balance, end of period at Mar. 31, 2021	2,377.4	$ 1.2	3,411.0	3,450.8	(437.8)	(4,058.9)	11.1
Balance, end of period (in shares) at Mar. 31, 2021		117,725,183
Balance, beginning of period at Dec. 31, 2021	2,531.7	$ 1.2	3,444.7	3,634.6	(389.4)	(4,169.4)	10.0
Balance, beginning of period (in shares) at Dec. 31, 2021		117,762,065
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	91.6			91.6
Other comprehensive income (loss)	(10.2)				(10.2)
Issuances under equity plans	(8.3)		(0.1)			(8.2)
Issuances under equity plans (in shares)		246,804
Share-based compensation expense	10.6		10.6
Repurchases of common stock	(59.9)					(59.9)
Noncontrolling interest transactions	0.6						0.6
Balance, end of period at Mar. 31, 2022	$ 2,556.1	$ 1.2	$ 3,455.2	$ 3,726.2	$ (399.6)	$ (4,237.5)	$ 10.6
Balance, end of period (in shares) at Mar. 31, 2022		118,008,869