Business Segment Information - Revenue by End Market (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue
Net sales	$ 268.3	$ 299.0	$ 798.0	$ 919.2
Sealing Products
Disaggregation of Revenue
Net sales	200.8	218.2	597.3	664.3
Engineered Products
Disaggregation of Revenue
Net sales	67.5	80.8	200.7	254.9
Aerospace
Disaggregation of Revenue
Net sales	12.9	19.9	41.4	52.5
Aerospace | Sealing Products
Disaggregation of Revenue
Net sales	12.0	16.1	37.0	43.0
Aerospace | Engineered Products
Disaggregation of Revenue
Net sales	0.9	3.8	4.4	9.5
Automotive
Disaggregation of Revenue
Net sales	17.1	18.3	45.3	65.6
Automotive | Sealing Products
Disaggregation of Revenue
Net sales	0.4	0.5	0.8	2.0
Automotive | Engineered Products
Disaggregation of Revenue
Net sales	16.7	17.8	44.5	63.6
Chemical and material processing
Disaggregation of Revenue
Net sales	20.3	26.0	67.7	80.5
Chemical and material processing | Sealing Products
Disaggregation of Revenue
Net sales	9.3	14.7	35.0	43.3
Chemical and material processing | Engineered Products
Disaggregation of Revenue
Net sales	11.0	11.3	32.7	37.2
Food and pharmaceutical
Disaggregation of Revenue
Net sales	13.1	13.4	38.7	32.9
Food and pharmaceutical | Sealing Products
Disaggregation of Revenue
Net sales	12.7	13.0	37.5	32.2
Food and pharmaceutical | Engineered Products
Disaggregation of Revenue
Net sales	0.4	0.4	1.2	0.7
General industrial
Disaggregation of Revenue
Net sales	54.4	59.8	175.1	192.6
General industrial | Sealing Products
Disaggregation of Revenue
Net sales	38.5	37.7	121.1	123.6
General industrial | Engineered Products
Disaggregation of Revenue
Net sales	15.9	22.1	54.0	69.0
Medium-duty/heavy-duty truck
Disaggregation of Revenue
Net sales	66.0	90.3	189.0	277.6
Medium-duty/heavy-duty truck | Sealing Products
Disaggregation of Revenue
Net sales	66.0	89.7	188.9	276.7
Medium-duty/heavy-duty truck | Engineered Products
Disaggregation of Revenue
Net sales	0.0	0.6	0.1	0.9
Oil and gas
Disaggregation of Revenue
Net sales	22.5	28.6	68.3	85.5
Oil and gas | Sealing Products
Disaggregation of Revenue
Net sales	5.5	7.6	19.0	22.6
Oil and gas | Engineered Products
Disaggregation of Revenue
Net sales	17.0	21.0	49.3	62.9
Power generation
Disaggregation of Revenue
Net sales	15.0	14.4	44.8	42.4
Power generation | Sealing Products
Disaggregation of Revenue
Net sales	9.5	11.9	30.5	35.2
Power generation | Engineered Products
Disaggregation of Revenue
Net sales	5.5	2.5	14.3	7.2
Semiconductors
Disaggregation of Revenue
Net sales	46.1	25.5	124.3	78.0
Semiconductors | Sealing Products
Disaggregation of Revenue
Net sales	46.1	25.5	124.3	78.0
Semiconductors | Engineered Products
Disaggregation of Revenue
Net sales	0.0	0.0	0.0	0.0
Other
Disaggregation of Revenue
Net sales	0.9	2.8	3.4	11.6
Other | Sealing Products
Disaggregation of Revenue
Net sales	0.8	1.5	3.2	7.7
Other | Engineered Products
Disaggregation of Revenue
Net sales	$ 0.1	$ 1.3	$ 0.2	$ 3.9