Condensed Consolidating Financial Statements (Statements of Operations and Comprehensive Income) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Condensed Consolidating Statements of Operations
Net sales	$ 790.3	$ 834.8
Cost of goods sold	588.7	611.6
Gross profit	201.6	223.2
Operating Expenses:
Selling, general and administrative expenses	145.8	155.2
Losses (gains) and other expenses, net	1.1	7.3
Restructuring charges	0.5	0.9
Gain (Loss) on Disposition of Business and Related Property	(8.5)	0.0
Gain (Loss) on Disposition of Assets	0.0	(10.3)
Insurance proceeds for lost profits	(39.5)	0.0
Gain from insurance recoveries, net of losses incurred	(6.9)	0.0
Income from equity method investments	(2.6)	(3.5)
Operating income	94.7	53.0
Interest expense, net	10.9	8.4
Other (income) expense, net	0.8	0.6
Income from continuing operations before income taxes	83.0	44.0
Income tax benefit	13.6	6.1
Income from continuing operations	69.4	37.9
Loss from discontinued operations	0.1	0.0
Net income	69.3	37.9
Other comprehensive income (loss), net of tax	8.6	(23.9)
Comprehensive income	77.9	14.0
Eliminations [Member]
Condensed Consolidating Statements of Operations
Net sales	(53.8)	(160.5)
Cost of goods sold	6.8	(158.3)
Gross profit	(60.6)	(2.2)
Operating Expenses:
Selling, general and administrative expenses	(0.2)	(0.2)
Losses (gains) and other expenses, net	(0.1)	(0.1)
Restructuring charges	0.0	0.0
Gain (Loss) on Disposition of Business and Related Property	0.0
Gain (Loss) on Disposition of Assets		0.0
Insurance proceeds for lost profits	0.0
Gain from insurance recoveries, net of losses incurred	0.0
Income from equity method investments	111.1	44.7
Operating income	(171.4)	(46.6)
Interest expense, net	0.0	0.0
Other (income) expense, net	0.0	0.0
Income from continuing operations before income taxes	(171.4)	(46.6)
Income tax benefit	(0.2)	0.2
Income from continuing operations	(171.2)	(46.8)
Loss from discontinued operations	0.0	0.0
Net income	(171.2)	(46.8)
Other comprehensive income (loss), net of tax	0.0	0.0
Comprehensive income	(171.2)	(46.8)
Parent [Member]
Condensed Consolidating Statements of Operations
Net sales	0.0	0.0
Cost of goods sold	0.0	0.0
Gross profit	0.0	0.0
Operating Expenses:
Selling, general and administrative expenses	0.0	0.0
Losses (gains) and other expenses, net	(0.6)	1.2
Restructuring charges	0.0	0.0
Gain (Loss) on Disposition of Business and Related Property	0.0
Gain (Loss) on Disposition of Assets		0.0
Insurance proceeds for lost profits	0.0
Gain from insurance recoveries, net of losses incurred	0.0
Income from equity method investments	(70.6)	(40.6)
Operating income	71.2	39.4
Interest expense, net	2.4	2.4
Other (income) expense, net	0.0	0.0
Income from continuing operations before income taxes	68.8	37.0
Income tax benefit	(0.5)	(0.9)
Income from continuing operations	69.3	37.9
Loss from discontinued operations	0.0	0.0
Net income	69.3	37.9
Other comprehensive income (loss), net of tax	6.4	(7.1)
Comprehensive income	75.7	30.8
Guarantor Subsidiaries [Member]
Condensed Consolidating Statements of Operations
Net sales	722.9	716.3
Cost of goods sold	530.8	533.4
Gross profit	192.1	182.9
Operating Expenses:
Selling, general and administrative expenses	136.5	133.7
Losses (gains) and other expenses, net	1.7	4.0
Restructuring charges	0.3	0.7
Gain (Loss) on Disposition of Business and Related Property	(0.8)
Gain (Loss) on Disposition of Assets		0.0
Insurance proceeds for lost profits	(39.5)
Gain from insurance recoveries, net of losses incurred	(6.9)
Income from equity method investments	(41.1)	(4.6)
Operating income	140.3	49.1
Interest expense, net	6.1	4.1
Other (income) expense, net	(5.8)	0.6
Income from continuing operations before income taxes	140.0	44.4
Income tax benefit	10.1	5.5
Income from continuing operations	129.9	38.9
Loss from discontinued operations	0.0	0.0
Net income	129.9	38.9
Other comprehensive income (loss), net of tax	0.4	(20.7)
Comprehensive income	130.3	18.2
Non-Guarantor Subsidiaries [Member]
Condensed Consolidating Statements of Operations
Net sales	121.2	279.0
Cost of goods sold	51.1	236.5
Gross profit	70.1	42.5
Operating Expenses:
Selling, general and administrative expenses	9.5	21.7
Losses (gains) and other expenses, net	0.1	2.2
Restructuring charges	0.2	0.2
Gain (Loss) on Disposition of Business and Related Property	(7.7)
Gain (Loss) on Disposition of Assets		(10.3)
Insurance proceeds for lost profits	0.0
Gain from insurance recoveries, net of losses incurred	0.0
Income from equity method investments	(2.0)	(3.0)
Operating income	54.6	11.1
Interest expense, net	2.4	1.9
Other (income) expense, net	6.6	0.0
Income from continuing operations before income taxes	45.6	9.2
Income tax benefit	4.2	1.3
Income from continuing operations	41.4	7.9
Loss from discontinued operations	0.1	0.0
Net income	41.3	7.9
Other comprehensive income (loss), net of tax	1.8	3.9
Comprehensive income	$ 43.1	$ 11.8