STATEMENTS OF CHANGES IN CONSOLIDATED EQUITY - USD ($) $ in Millions	Total	[CommonStockMember]	Additional Paid-in Capital [Member]	[RetainedEarningsMember]	[TreasuryStockMember]	[AccumulatedOtherComprehensiveIncomeMember]	[NoncontrollingInterestMember]
Total Stockholders' Equity at Dec. 31, 2021	$ 832.7	$ 12.7	$ 1,596.7	$ 72.7	$ (4.8)	$ (991.7)	$ 147.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	35.2			30.9			4.3
Other comprehensive income	31.9					31.2	0.7
Purchase of treasury stock	(89.9)				(89.9)
Dividends paid to noncontrolling interest	(16.0)						(16.0)
Sale of subsidiary shares to noncontrolling interest	0.9						0.9
Employee stock plans	0.9	0.1	5.8	0.0	(5.0)
Total Stockholders' Equity at Mar. 31, 2022	795.7	12.8	1,602.5	103.6	(99.7)	(960.5)	137.0
Total Stockholders' Equity at Dec. 31, 2022	1,157.2	13.1	1,668.1	176.9	(87.0)	(725.2)	111.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	72.2			70.1			2.1
Other comprehensive income	(1.4)					(5.8)	4.4
Purchase of treasury stock	(10.1)				(10.1)
Employee stock plans	(3.6)	0.1	7.0	0.0	(10.7)
Total Stockholders' Equity at Mar. 31, 2023	$ 1,214.3	$ 13.2	$ 1,675.1	$ 247.0	$ (107.8)	$ (731.0)	$ 117.8