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Net Sales (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 28, 2025	Sep. 29, 2024	Sep. 28, 2025	Sep. 29, 2024
Disaggregation of Revenue [Line Items]
Net sales	$ 92.9	$ 99.4	$ 293.9	$ 288.5
Defense, First Response & Healthcare
Disaggregation of Revenue [Line Items]
Net sales	47.1	43.2	137.1	120.2
Transportation
Disaggregation of Revenue [Line Items]
Net sales	25.9	25.7	80.6	82.9
Specialty industrial
Disaggregation of Revenue [Line Items]
Net sales	19.9	30.5	76.2	85.4
Gas Cylinders
Disaggregation of Revenue [Line Items]
Net sales	42.9	42.6	131.0	137.8
Gas Cylinders | Defense, First Response & Healthcare
Disaggregation of Revenue [Line Items]
Net sales	20.0	19.2	60.1	64.4
Gas Cylinders | Transportation
Disaggregation of Revenue [Line Items]
Net sales	15.7	14.2	48.3	50.5
Gas Cylinders | Specialty industrial
Disaggregation of Revenue [Line Items]
Net sales	7.2	9.2	22.6	22.9
Elektron
Disaggregation of Revenue [Line Items]
Net sales	50.0	48.8	149.5	128.5
Elektron | Defense, First Response & Healthcare
Disaggregation of Revenue [Line Items]
Net sales	27.1	24.0	77.0	55.8
Elektron | Transportation
Disaggregation of Revenue [Line Items]
Net sales	10.2	11.5	32.3	32.4
Elektron | Specialty industrial
Disaggregation of Revenue [Line Items]
Net sales	12.7	13.3	40.2	40.3
Graphic Arts
Disaggregation of Revenue [Line Items]
Net sales	0.0	8.0	13.4	22.2
Graphic Arts | Defense, First Response & Healthcare
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Graphic Arts | Transportation
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Graphic Arts | Specialty industrial
Disaggregation of Revenue [Line Items]
Net sales	$ 0.0	$ 8.0	$ 13.4	$ 22.2

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