Segment Information - Segment Results (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Segment Reporting Information [Line Items]
Sales	$ 2,719.5	$ 2,510.6	$ 2,566.5
Operating profit (loss)	216.1	(1,038.2)	31.5
Other expense, net	(2.3)	(0.1)	(23.0)
Interest expense, net	(36.6)	(46.4)	(63.4)
Income (loss) before income taxes	177.2	(1,084.7)	(54.9)
Depreciation and amortization	116.0	123.1	135.6
Capital expenditures, gross	46.3	34.1	53.2
Identifiable assets	5,679.0	5,350.5
Operating segments
Segment Reporting Information [Line Items]
Sales	2,719.5	2,510.6	2,566.5
Expenses	2,370.3	2,268.4	2,178.1
Operating profit (loss)	349.2	242.2	388.4
Corporate and other
Segment Reporting Information [Line Items]
Operating profit (loss)	(133.1)	(1,280.4)	(356.9)
Depreciation and amortization	1.8	2.1	2.3
Capital expenditures, gross	0.9	3.2	1.9
Identifiable assets	1,248.6	1,112.1
Specialty Products & Technologies
Segment Reporting Information [Line Items]
Sales	1,752.8	1,616.4
Specialty Products & Technologies | Operating segments
Segment Reporting Information [Line Items]
Sales	1,752.8	1,616.4	1,642.4
Expenses	1,561.6	1,526.5	1,410.3
Operating profit (loss)	191.2	89.9	232.1
Depreciation and amortization	86.0	85.1	86.1
Capital expenditures, gross	28.6	20.4	39.0
Identifiable assets	2,488.3	2,354.2
Equipment & Consumables
Segment Reporting Information [Line Items]
Sales	966.7	894.2
Equipment & Consumables | Operating segments
Segment Reporting Information [Line Items]
Sales	966.7	894.2	924.1
Expenses	808.7	741.9	767.8
Operating profit (loss)	158.0	152.3	156.3
Depreciation and amortization	28.2	35.9	47.2
Capital expenditures, gross	16.8	10.5	$ 12.3
Identifiable assets	$ 1,942.1	$ 1,884.2