Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Income Statement [Abstract]
Net sales	$ 834.8	$ 793.4
Cost of goods sold	611.6	582.5
Gross profit	223.2	210.9
Operating Expenses:
Selling, general and administrative expenses	155.2	152.4
Losses and other expenses, net	7.3	3.1
Restructuring charges	(0.9)	(0.1)
Loss on assets held for sale	10.3	0.0
Income from equity method investments	(3.5)	(5.5)
Operating income	53.0	60.8
Interest expense, net	8.4	7.4
Other expense, net	0.6	0.0
Income from continuing operations before income taxes	44.0	53.4
Provision for income taxes	6.1	9.9
Income from continuing operations	37.9	43.5
Discontinued Operations:
Loss from discontinued operations before income taxes	0.0	0.0
Benefit from income taxes	0.0	0.0
Loss from discontinued operations	0.0	0.0
Net income	$ 37.9	$ 43.5
Earnings per share – Basic:
Income from continuing operations (in dollars per share)	$ 0.91	$ 1.02
Loss from discontinued operations (in dollars per share)	0.00	0.00
Net income (in dollars per share)	0.91	1.02
Earnings per share – Diluted:
Income from continuing operations (in dollars per share)	0.90	1.00
Loss from discontinued operations (in dollars per share)	0.00	0.00
Net income (in dollars per share)	$ 0.90	$ 1.00
Average shares outstanding:
Weighted Average Number of Shares Outstanding - Basic	41.5	42.8
Weighted Average Number of Shares Outstanding - Diluted	42.1	43.5
Cash dividends declared per share	$ 0.51	$ 0.43