Business, Product and Geographical Area Information and Concentration of Risk - Schedule of Net Sales, Income Taxes Paid, and Long-lived Assets, by Geographical Area (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales	$ 1,172.7	$ 1,514.1	$ 1,585.9
Income taxes paid	1.0	5.5	3.6
Long-lived assets	627.2	622.0	611.8
Domestic
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales	1,126.8	1,461.4	1,509.6
Income taxes paid	0.7	3.5	1.6
Long-lived assets	597.5	592.9	581.7
Foreign
Revenues From External Customers And Long Lived Assets [Line Items]
Net sales	45.9	52.7	76.3
Income taxes paid	0.3	2.0	2.0
Long-lived assets	$ 29.7	$ 29.1	$ 30.1