Quarterly Financial Data (Unaudited) - Schedule of Quarterly Financial Data (Details) - USD ($) $ / shares in Units, $ 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
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 556.5	$ 527.7	$ 512.4	$ 476.1	$ 523.0	$ 481.8	$ 485.0	$ 491.7	$ 2,072.7	$ 1,981.5	$ 1,895.9
Cost of sales (exclusive of items shown separately on Statement of Operations)	449.6	441.6	415.2	394.9	443.5	392.9	379.6	397.6	1,701.3	1,613.6	1,549.4
Income before income taxes	43.3	40.7	53.5	42.7	37.2	43.5	59.4	51.8	180.2	191.9	188.6
Net income	$ 35.4	$ 31.7	$ 39.2	$ 31.4	$ 25.3	$ 32.9	$ 44.1	$ 38.7	$ 137.7	$ 141.0	$ 137.3
Basic EPS (in USD per share)	$ 0.46	$ 0.40	$ 0.50	$ 0.40	$ 0.32	$ 0.42	$ 0.56	$ 0.49	$ 1.76	$ 1.79	$ 1.80
Diluted EPS (in USD per share)	$ 0.43	$ 0.38	$ 0.47	$ 0.37	$ 0.30	$ 0.39	$ 0.54	$ 0.47	$ 1.66	$ 1.69	$ 1.75