Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Statement [Abstract]
Net sales	$ 1,030.2	$ 1,052.3	$ 3,040.4	$ 2,947.9
Cost of goods sold	728.3	738.6	2,153.8	2,082.4
Gross profit	301.9	313.7	886.6	865.5
Operating Expenses:
Selling, general and administrative expenses	149.4	158.7	466.1	479.6
Losses and other expenses, net	2.7	3.0	10.0	8.5
Restructuring charges	(0.5)	(1.9)	(1.9)	(2.1)
Loss (gain), net on sale of businesses and related property	6.2	0.0	25.8	0.0
Loss (gain) from natural disaster, net of Insurance recoveries	0.3	0.0	0.3	0.0
Income from equity method investments	(2.4)	(4.5)	(10.8)	(15.5)
Operating income	145.2	154.6	393.3	390.8
Interest expense, net	10.3	7.6	28.5	23.3
Other expense (income), net	1.1	0.0	2.4	(0.2)
Income from continuing operations before income taxes	133.8	147.0	362.4	367.7
Provision for income taxes	25.8	43.0	77.3	103.8
Income from continuing operations	108.0	104.0	285.1	263.9
Discontinued Operations:
(Loss) income from discontinued operations before income taxes	0.0	(0.8)	0.4	(2.3)
Income tax (benefit) expense	0.0	(0.3)	2.1	(0.9)
Loss from discontinued operations	0.0	(0.5)	(1.7)	(1.4)
Net income	$ 108.0	$ 103.5	$ 283.4	$ 262.5
Earnings per share – Basic:
Income from continuing operations (in dollars per share)	$ 2.68	$ 2.48	$ 6.98	$ 6.23
Loss from discontinued operations (in dollars per share)	0.00	(0.01)	(0.04)	(0.03)
Net income (in dollars per share)	2.68	2.47	6.94	6.20
Earnings per share – Diluted:
Income from continuing operations (in dollars per share)	2.65	2.45	6.90	6.15
Loss from discontinued operations (in dollars per share)	0.00	(0.01)	(0.04)	(0.03)
Net income (in dollars per share)	$ 2.65	$ 2.44	$ 6.86	$ 6.12
Average shares outstanding:
Weighted Average Number of Shares Outstanding - Basic	40.3	41.9	40.8	42.3
Weighted Average Number of Shares Outstanding - Diluted	40.7	42.4	41.3	42.9
Cash dividends declared per share	$ 0.64	$ 0.51	$ 1.79	$ 1.45