Consolidated Statements of Operations - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Statement [Abstract]
Net sales	$ 365.9	$ 380.4	$ 371.1	$ 328.0	$ 378.7	$ 384.0	$ 368.4	$ 325.5	$ 1,445.4	$ 1,456.6	$ 1,570.1
Cost of sales									908.5	923.8	1,068.4
Gross profit	$ 132.8	$ 143.9	$ 137.2	$ 123.0	$ 138.5	$ 142.0	$ 134.7	$ 117.6	536.9	532.8	501.7
Selling, general and administrative expenses									278.2	290.1	291.6
Amortization expense									31.2	31.2	31.4
Separation expense									1.6	6.5	4.3
Restructuring expense									10.8	2.5	4.6
(Gain) loss from impairment or disposal of assets — net									(4.0)	3.3	9.9
Earnings from operations									219.1	199.2	159.9
Interest expense									86.9	85.2	1.4
Interest expense (income) on notes with MTW — net									0.0	0.1	(15.8)
Loss on early extinguishment of debt									4.4	0.0	0.0
Other expense (income) — net									9.0	9.1	(22.1)
Earnings before income taxes									118.8	104.8	196.4
Income taxes									(15.2)	25.3	39.3
Net earnings									$ 134.0	$ 79.5	$ 157.1
Per share data
Earnings per share - Basic (in dollars per share)	$ 0.47	$ 0.24	$ 0.22	$ 0.04	$ 0.15	$ 0.18	$ 0.11	$ 0.13	$ 0.96	$ 0.58	$ 1.15
Earnings per share - Diluted (in dollars per share)	$ 0.47	$ 0.24	$ 0.21	$ 0.04	$ 0.15	$ 0.18	$ 0.11	$ 0.13	$ 0.95	$ 0.57	$ 1.15
Weighted average shares outstanding - Basic (in shares)									138,995,541	137,906,284	137,016,712
Weighted average shares outstanding - Diluted (in shares)									140,707,092	139,714,120	137,016,712