Business Segment Information - Schedule of Segment Operating Results and Other Financial Data (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Segment Reporting Information
Net sales	$ 268.3	$ 299.0	$ 798.0	$ 919.2
Segment profit	(7.5)	19.1	14.8	66.4
Other expense, net	(17.2)	(24.6)	(15.5)	(27.3)
Income (loss) from continuing operations before income taxes	(28.6)	(9.3)	(12.1)	26.6
Operating segments
Segment Reporting Information
Net sales	269.5	300.6	802.8	923.8
Segment profit	29.5	28.4	69.3	94.9
Intersegment sales
Segment Reporting Information
Net sales	(1.2)	(1.6)	(4.8)	(4.6)
Corporate
Segment Reporting Information
Segment profit	(11.7)	(8.1)	(27.3)	(25.5)
Interest expense, net	(3.9)	(3.8)	(11.4)	(12.5)
Other expense, net	(42.5)	(25.8)	(42.7)	(30.3)
Sealing Products
Segment Reporting Information
Net sales	200.8	218.2	597.3	664.3
Sealing Products | Operating segments
Segment Reporting Information
Net sales	201.8	219.5	601.4	668.0
Segment profit	33.0	17.8	69.5	66.2
Engineered Products
Segment Reporting Information
Net sales	67.5	80.8	200.7	254.9
Engineered Products | Operating segments
Segment Reporting Information
Net sales	67.7	81.1	201.4	255.8
Segment profit	$ (3.5)	$ 10.6	$ (0.2)	$ 28.7