Segment and Related Information, Segment Information (Details) $ in Millions	3 Months Ended			12 Months Ended
	Dec. 31, 2024 USD ($)	Jun. 30, 2024 USD ($)	Oct. 01, 2023 USD ($)	Dec. 31, 2024 USD ($) Segment ProductLine	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Segment Reporting Information [Abstract]
Number of reportable segments | Segment				2
Net sales				$ 2,118.5	$ 2,169.9	$ 2,125.5
Cost of goods sold				1,570.8	1,662.8	1,660.5
Production margin				547.7	507.1	465.0
Marketing and administrative expenses				209.2	206.0	192.1
Research and development expenses				23.0	21.2	20.4
Provision for credit losses		$ 30.0		30.0	0.0	0.0
Gain on sale of assets, net				(12.3)	0.0	0.0
Impairment of assets				0.0	71.7	0.0
Restructuring and other items, net				0.0	6.9	0.0
Acquisition-related expenses				0.0	0.3	5.1
Litigation expenses				11.3	29.2	32.6
Income from operations				286.5	171.8	214.8
Interest expense, net				56.4	59.2	43.9
Other non-operating deductions, net				(4.7)	(4.9)	(3.8)
Debt extinguishment expenses	$ (1.8)			(1.8)	0.0	(6.9)
Non-cash pension settlement charge				0.0	0.0	(3.5)
Income before tax and equity in earnings				223.6	107.7	156.7
Depreciation, depletion and amortization				94.9	95.0	94.2
Segment assets	3,393.9			$ 3,393.9	3,346.6
Consumer & Specialties [Member]
Segment Reporting Information [Abstract]
Number of product lines in segment | ProductLine				2
Net sales				$ 1,140.2	1,160.2	1,124.6
Impairment of assets			$ 71.7
Engineered Solutions [Member]
Segment Reporting Information [Abstract]
Number of product lines in segment | ProductLine				2
Net sales				$ 978.3	1,009.7	1,000.9
Gain on sale of assets, net	(12.3)
Operating Segments [Member]
Segment Reporting Information [Abstract]
Net sales				2,118.5	2,169.9	2,125.5
Cost of goods sold				1,570.8	1,663.0	1,660.5
Production margin				547.7	506.9	465.0
Marketing and administrative expenses				197.5	193.7	183.8
Research and development expenses				23.0	21.2	20.4
Gain on sale of assets, net				(12.3)	0.0
Impairment of assets				0.0	71.7
Restructuring and other items, net				0.0	4.1
Acquisition-related expenses						2.1
Litigation expenses				0.0	26.8	32.6
Income from operations				339.5	189.4	226.1
Depreciation, depletion and amortization				94.9	94.9	94.2
Segment assets	3,393.9			3,393.9	3,346.6	3,401.6
Capital expenditures				89.5	93.5	82.3
Operating Segments [Member] | Consumer & Specialties [Member]
Segment Reporting Information [Abstract]
Net sales				1,140.2	1,160.2	1,124.6
Cost of goods sold				890.4	938.6	937.0
Production margin				249.8	221.6	187.6
Marketing and administrative expenses				71.7	69.1	63.1
Research and development expenses				12.6	11.5	10.8
Gain on sale of assets, net				0.0	0.0
Impairment of assets				0.0	71.7
Restructuring and other items, net				0.0	0.9
Acquisition-related expenses						2.1
Litigation expenses				0.0	26.8	32.6
Income from operations				165.5	41.6	79.0
Depreciation, depletion and amortization				47.2	47.2	48.0
Segment assets	1,289.4			1,289.4	1,244.8	1,107.5
Capital expenditures				45.2	56.8	44.3
Operating Segments [Member] | Engineered Solutions [Member]
Segment Reporting Information [Abstract]
Net sales				978.3	1,009.7	1,000.9
Cost of goods sold				680.4	724.4	723.5
Production margin				297.9	285.3	277.4
Marketing and administrative expenses				125.8	124.6	120.7
Research and development expenses				10.4	9.7	9.6
Gain on sale of assets, net				(12.3)	0.0
Impairment of assets				0.0	0.0
Restructuring and other items, net				0.0	3.2
Acquisition-related expenses						0.0
Litigation expenses				0.0	0.0	0.0
Income from operations				174.0	147.8	147.1
Depreciation, depletion and amortization				47.7	47.7	46.2
Segment assets	2,028.0			2,028.0	2,028.5	2,187.5
Capital expenditures				39.3	31.2	34.0
Reconciling Item [Member]
Segment Reporting Information [Abstract]
Provision for credit losses				30.0	0.0	0.0
Restructuring and other items, net				0.0	2.8	0.0
Acquisition-related expenses				0.0	0.3	3.0
Litigation expenses				11.3	2.4	0.0
Interest expense, net				(56.4)	(59.2)	(43.9)
Other non-operating deductions, net				(4.7)	(4.9)	(3.8)
Unallocated corporate expenses				11.7	12.1	8.3
Debt extinguishment expenses				(1.8)	0.0	(6.9)
Non-cash pension settlement charge				0.0	0.0	(3.5)
Corporate [Member] | Engineered Solutions [Member]
Segment Reporting Information [Abstract]
Segment assets	$ 76.5			76.5	73.3	106.6
Capital expenditures				$ 5.0	$ 5.5	$ 4.0