Business Segment Information - Revenue by End Market (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Disaggregation of Revenue
Net sales	$ 247.0	$ 317.2	$ 529.7	$ 620.2
Sealing Products
Disaggregation of Revenue
Net sales	188.5	230.2	396.5	446.7
Engineered Products
Disaggregation of Revenue
Net sales	58.5	87.0	133.2	173.5
Aerospace
Disaggregation of Revenue
Net sales	13.7	17.8	28.5	32.6
Aerospace | Sealing Products
Disaggregation of Revenue
Net sales	12.5	14.8	25.0	26.9
Aerospace | Engineered Products
Disaggregation of Revenue
Net sales	1.2	3.0	3.5	5.7
Automotive
Disaggregation of Revenue
Net sales	7.5	23.0	28.2	47.3
Automotive | Sealing Products
Disaggregation of Revenue
Net sales	0.2	0.5	0.4	1.5
Automotive | Engineered Products
Disaggregation of Revenue
Net sales	7.3	22.5	27.8	45.8
Chemical and material processing
Disaggregation of Revenue
Net sales	24.4	26.2	47.4	53.8
Chemical and material processing | Sealing Products
Disaggregation of Revenue
Net sales	12.8	13.2	25.7	28.6
Chemical and material processing | Engineered Products
Disaggregation of Revenue
Net sales	11.6	13.0	21.7	25.2
Food and pharmaceutical
Disaggregation of Revenue
Net sales	13.9	9.6	25.6	19.5
Food and pharmaceutical | Sealing Products
Disaggregation of Revenue
Net sales	13.6	9.5	24.8	19.2
Food and pharmaceutical | Engineered Products
Disaggregation of Revenue
Net sales	0.3	0.1	0.8	0.3
General industrial
Disaggregation of Revenue
Net sales	55.3	67.5	120.7	136.6
General industrial | Sealing Products
Disaggregation of Revenue
Net sales	36.6	43.1	82.6	85.9
General industrial | Engineered Products
Disaggregation of Revenue
Net sales	18.7	24.4	38.1	50.7
Medium-duty/heavy-duty truck
Disaggregation of Revenue
Net sales	54.1	97.9	123.0	187.4
Medium-duty/heavy-duty truck | Sealing Products
Disaggregation of Revenue
Net sales	54.1	97.8	122.9	187.0
Medium-duty/heavy-duty truck | Engineered Products
Disaggregation of Revenue
Net sales	0.0	0.1	0.1	0.4
Oil and gas
Disaggregation of Revenue
Net sales	20.4	27.1	45.8	52.7
Oil and gas | Sealing Products
Disaggregation of Revenue
Net sales	5.4	7.7	13.5	15.7
Oil and gas | Engineered Products
Disaggregation of Revenue
Net sales	15.0	19.4	32.3	37.0
Power generation
Disaggregation of Revenue
Net sales	15.5	15.0	29.8	28.0
Power generation | Sealing Products
Disaggregation of Revenue
Net sales	11.1	12.7	21.0	23.3
Power generation | Engineered Products
Disaggregation of Revenue
Net sales	4.4	2.3	8.8	4.7
Semiconductors
Disaggregation of Revenue
Net sales	41.7	27.0	78.2	52.5
Semiconductors | Sealing Products
Disaggregation of Revenue
Net sales	41.7	27.0	78.2	52.5
Semiconductors | Engineered Products
Disaggregation of Revenue
Net sales	0.0	0.0	0.0	0.0
Other
Disaggregation of Revenue
Net sales	0.5	6.1	2.5	9.8
Other | Sealing Products
Disaggregation of Revenue
Net sales	0.5	3.9	2.4	6.1
Other | Engineered Products
Disaggregation of Revenue
Net sales	$ 0.0	$ 2.2	$ 0.1	$ 3.7