Consolidated Statements of Operations - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Income Statement [Abstract]
Total net sales	$ 420.7	$ 371.1	$ 771.1	$ 699.1
Cost of sales	271.4	233.9	495.6	438.9
Gross profit	149.3	137.2	275.5	260.2
Selling, general and administrative expenses	83.0	74.3	159.3	148.3
Amortization expense	9.4	7.7	17.3	15.5
Separation expense	0.0	0.3	0.1	1.2
Restructuring expense	1.4	1.1	1.8	5.7
Gain from impairment or disposal of assets — net	(0.1)	(0.6)	(0.2)	(0.2)
Earnings from operations	55.6	54.4	97.2	89.7
Interest expense	23.1	21.0	43.4	44.2
Loss on early extinguishment of debt	0.0	0.2	0.0	3.4
Other expense — net	15.3	3.3	23.8	5.1
Earnings before income taxes	17.2	29.9	30.0	37.0
Income taxes	5.1	(0.2)	5.4	1.9
Net earnings	$ 12.1	$ 30.1	$ 24.6	$ 35.1
Per share data
Earnings per share - Basic (in dollars per share)	$ 0.09	$ 0.22	$ 0.18	$ 0.25
Earnings per share - Diluted (in dollars per share)	$ 0.09	$ 0.21	$ 0.17	$ 0.25
Weighted average shares outstanding - Basic (in shares)	139,998,308	138,972,873	139,853,748	138,866,565
Weighted average shares outstanding - Diluted (in shares)	141,071,259	140,661,436	141,131,122	140,464,156