Operations by Segment - Net Sales and Long-Lived Assets by Geographic Location (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived Assets	$ 672.0				$ 673.2				$ 672.0	$ 673.2	$ 625.9
Net sales	834.5	$ 760.0	$ 663.9	$ 636.9	750.9	$ 728.2	$ 765.4	$ 748.2	2,895.3	2,992.7	3,187.9
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived Assets	355.8				360.2				355.8	360.2	327.3
Net sales									1,904.9	1,868.7	1,820.8
China
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived Assets	268.3				266.7				268.3	266.7	252.6
Net sales									695.6	825.4	1,071.2
Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived Assets	4.5				4.2				4.5	4.2	3.1
Net sales									175.0	168.5	175.0
Other Foreign
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived Assets	$ 43.4				$ 42.1				43.4	42.1	42.9
Net sales									$ 119.8	$ 130.1	$ 120.9