Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Income Statement [Abstract]
Net sales	$ 1,175.4	$ 1,102.1	$ 2,010.2	$ 1,895.6
Cost of goods sold	813.8	761.3	1,425.5	1,343.8
Gross profit	361.6	340.8	584.7	551.8
Operating Expenses:
Selling, general and administrative expenses	161.4	168.5	316.6	320.9
Losses and other expenses, net	0.2	2.3	7.5	5.4
Restructuring charges	(0.5)	(0.1)	(1.3)	(0.2)
(Gain) loss, net on sale of business and related property	(22.1)	0.0	(11.8)	0.0
Loss on assets held for sale	31.4	0.0	31.4	0.0
Income from equity method investments	(4.9)	(5.5)	(8.4)	(10.9)
Operating income	195.1	175.4	248.1	236.2
Interest expense, net	9.8	8.2	18.2	15.7
Other expense (income), net	0.8	(0.1)	1.4	(0.1)
Income from continuing operations before income taxes	184.5	167.3	228.5	220.6
Provision for income taxes	45.3	50.9	51.4	60.7
Income from continuing operations	139.2	116.4	177.1	159.9
Discontinued Operations:
Income (loss) from discontinued operations before income taxes	0.4	(1.5)	0.4	(1.5)
Income tax expense (benefit)	2.0	(0.6)	2.0	(0.6)
Loss from discontinued operations	(1.6)	(0.9)	(1.6)	(0.9)
Net income	$ 137.6	$ 115.5	$ 175.5	$ 159.0
Earnings per share – Basic:
Income from continuing operations (in dollars per share)	$ 3.42	$ 2.75	$ 4.31	$ 3.76
Loss from discontinued operations (in dollars per share)	(0.04)	(0.02)	(0.04)	(0.02)
Net income (in dollars per share)	3.38	2.73	4.27	3.74
Earnings per share – Diluted:
Income from continuing operations (in dollars per share)	3.39	2.71	4.26	3.70
Loss from discontinued operations (in dollars per share)	(0.04)	(0.02)	(0.04)	(0.02)
Net income (in dollars per share)	$ 3.35	$ 2.69	$ 4.22	$ 3.68
Average shares outstanding:
Weighted Average Number of Shares Outstanding - Basic	40.7	42.3	41.1	42.6
Weighted Average Number of Shares Outstanding - Diluted	41.1	42.9	41.6	43.2
Cash dividends declared per share	$ 0.64	$ 0.51	$ 1.15	$ 0.94