Condensed Consolidating Financial Statements (Statements of Operations and Comprehensive Income) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Condensed Consolidating Statements of Operations
Net sales	$ 793.4	$ 715.2
Cost of goods sold	582.5	531.6
Gross profit	210.9	183.6
Operating Expenses:
Selling, general and administrative expenses	152.4	140.4
Losses and other expenses, net	3.1	4.3
Restructuring charges (gains)	(0.1)	0.2
Income from equity method investments	(5.5)	(4.6)
Operating income	60.8	43.7
Interest expense, net	7.4	5.8
Income from continuing operations before income taxes	53.4	37.9
Provision for income taxes	9.9	13.0
Income from continuing operations	43.5	24.9
Loss from discontinued operations	0.0	0.0
Net income	43.5	24.9
Other comprehensive income (loss), net of tax	18.6	14.0
Comprehensive income	62.1	38.9
Eliminations [Member]
Condensed Consolidating Statements of Operations
Net sales	(151.7)	(42.4)
Cost of goods sold	(148.5)	(40.4)
Gross profit	(3.2)	(2.0)
Operating Expenses:
Selling, general and administrative expenses	(0.2)	0.0
Losses and other expenses, net	(0.1)	0.0
Restructuring charges (gains)	0.0	0.0
Income from equity method investments	60.7	27.5
Operating income	(63.6)	(29.5)
Interest expense, net	0.0	0.0
Income from continuing operations before income taxes	(63.6)	(29.5)
Provision for income taxes	(0.8)	(0.9)
Income from continuing operations	(62.8)	(28.6)
Loss from discontinued operations	0.0	0.0
Net income	(62.8)	(28.6)
Other comprehensive income (loss), net of tax	108.4	1.0
Comprehensive income	45.6	(27.6)
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 and other expenses, net	0.6	(0.6)
Restructuring charges (gains)	0.0	0.0
Income from equity method investments	(48.6)	(28.1)
Operating income	48.0	28.7
Interest expense, net	7.2	5.3
Income from continuing operations before income taxes	40.8	23.4
Provision for income taxes	(2.7)	(1.5)
Income from continuing operations	43.5	24.9
Loss from discontinued operations	0.0	0.0
Net income	43.5	24.9
Other comprehensive income (loss), net of tax	(71.2)	4.6
Comprehensive income	(27.7)	29.5
Guarantor Subsidiaries [Member]
Condensed Consolidating Statements of Operations
Net sales	686.3	613.8
Cost of goods sold	513.3	460.7
Gross profit	173.0	153.1
Operating Expenses:
Selling, general and administrative expenses	130.5	118.9
Losses and other expenses, net	2.0	2.5
Restructuring charges (gains)	0.0	(0.1)
Income from equity method investments	(12.7)	0.0
Operating income	53.2	31.6
Interest expense, net	(0.8)	(0.5)
Income from continuing operations before income taxes	54.0	32.1
Provision for income taxes	7.1	11.9
Income from continuing operations	46.9	20.2
Loss from discontinued operations	0.0	0.0
Net income	46.9	20.2
Other comprehensive income (loss), net of tax	(29.4)	2.1
Comprehensive income	17.5	22.3
Non-Guarantor Subsidiaries [Member]
Condensed Consolidating Statements of Operations
Net sales	258.8	143.8
Cost of goods sold	217.7	111.3
Gross profit	41.1	32.5
Operating Expenses:
Selling, general and administrative expenses	22.1	21.5
Losses and other expenses, net	0.6	2.4
Restructuring charges (gains)	(0.1)	0.3
Income from equity method investments	(4.9)	(4.0)
Operating income	23.2	12.9
Interest expense, net	1.0	1.0
Income from continuing operations before income taxes	22.2	11.9
Provision for income taxes	6.3	3.5
Income from continuing operations	15.9	8.4
Loss from discontinued operations	0.0	0.0
Net income	15.9	8.4
Other comprehensive income (loss), net of tax	10.8	6.3
Comprehensive income	$ 26.7	$ 14.7