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, 2020	$ 641.4	$ 12.7	$ 1,625.5	$ 106.5	$ 0.0	$ (1,223.6)	$ 120.3
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(2.4)			(7.9)			5.5
Other comprehensive income	15.6					15.0	0.6
Employee stock plans	0.1	0.0	4.8	0.0	(4.7)
Total Stockholders' Equity at Mar. 31, 2021	609.3	12.7	1,580.5	103.0	(4.7)	(1,208.6)	126.4
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 (loss)	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