Condensed Consolidating Financial Statements (Statements of Operations and Comprehensive Income) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Condensed Income Statements, Captions [Line Items]
Net sales	$ 897.3	$ 1,010.0	$ 1,019.2	$ 715.2	$ 834.1	$ 955.0	$ 992.5	$ 685.8	$ 3,641.6	$ 3,467.4	$ 3,367.4
Cost of goods sold									2,565.1	2,520.0	2,464.1
Gross profit	267.6	310.3	315.0	183.6	227.6	273.4	283.4	163.0	1,076.5	947.4	903.3
Operating expenses:
Selling, general and administrative expenses									621.0	580.5	573.7
Losses and other expenses, net									11.3	21.7	6.8
Restructuring charges									1.8	3.2	1.9
Goodwill impairment					5.5				0.0	5.5	0.0
Impairment of assets					44.5				0.0	44.5	0.0
Pension and Other Postretirement Benefit Expense									31.4	0.0	0.0
Income from equity method investments									(18.4)	(13.4)	(13.8)
Operating income									429.4	305.4	334.7
Interest expense, net									27.0	23.6	17.2
Other income, net									(0.3)	(0.8)	(0.1)
Income from continuing operations before income taxes									402.7	282.6	317.6
Provision for income taxes									124.1	95.4	109.5
Income from continuing operations									278.6	187.2	208.1
Loss from discontinued operations									(0.8)	(0.6)	(2.3)
Net income	$ 40.4	$ 101.7	$ 110.7	$ 24.9	$ 11.2	$ 80.3	$ 81.2	$ 13.9	277.8	186.6	205.8
Other comprehensive income (loss)									9.6	(51.2)	(92.4)
Comprehensive income									287.4	135.4	113.4
Parent [Member]
Condensed Income Statements, Captions [Line Items]
Net sales									0.0	0.0	0.0
Cost of goods sold									0.0	0.0	0.0
Gross profit									0.0	0.0	0.0
Operating expenses:
Selling, general and administrative expenses									0.0	0.0	0.0
Losses and other expenses, net									(3.3)	0.7	0.0
Restructuring charges									0.0	0.0	0.0
Goodwill impairment									0.0	0.0	0.0
Impairment of assets									0.0	0.0	0.0
Pension and Other Postretirement Benefit Expense									0.0	0.0	0.0
Income from equity method investments									(292.4)	(201.8)	(216.4)
Operating income									295.7	201.1	216.4
Interest expense, net									24.4	22.4	16.0
Other income, net									0.0	0.0	0.0
Income from continuing operations before income taxes									271.3	178.7	200.4
Provision for income taxes									(6.5)	(7.8)	(5.6)
Income from continuing operations									277.8	186.5	206.0
Loss from discontinued operations									0.0	0.0	0.0
Net income									277.8	186.5	206.0
Other comprehensive income (loss)									14.0	(3.5)	(4.1)
Comprehensive income									291.8	183.0	201.9
Guarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Net sales									3,117.6	2,950.6	2,775.7
Cost of goods sold									2,203.8	2,150.9	2,057.8
Gross profit									913.8	799.7	717.9
Operating expenses:
Selling, general and administrative expenses									524.3	485.6	454.5
Losses and other expenses, net									9.7	13.7	3.2
Restructuring charges									1.9	(0.5)	0.4
Goodwill impairment									0.0	5.5	0.0
Impairment of assets									0.0	44.5	0.0
Pension and Other Postretirement Benefit Expense									30.5	0.0	0.0
Income from equity method investments									(40.7)	(5.9)	(25.4)
Operating income									388.1	256.8	285.2
Interest expense, net									(2.2)	(2.0)	(3.0)
Other income, net									0.0	0.0	0.0
Income from continuing operations before income taxes									390.3	258.8	288.2
Provision for income taxes									108.2	87.9	91.7
Income from continuing operations									282.1	170.9	196.5
Loss from discontinued operations									0.0	0.0	0.0
Net income									282.1	170.9	196.5
Other comprehensive income (loss)									8.5	(3.3)	(51.2)
Comprehensive income									290.6	167.6	145.3
Non-Guarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Net sales									728.0	701.8	818.0
Cost of goods sold									564.5	556.4	628.3
Gross profit									163.5	145.4	189.7
Operating expenses:
Selling, general and administrative expenses									96.7	94.9	119.2
Losses and other expenses, net									5.1	7.5	3.6
Restructuring charges									(0.1)	3.7	1.5
Goodwill impairment									0.0	0.0	0.0
Impairment of assets									0.0	0.0	0.0
Pension and Other Postretirement Benefit Expense									0.9	0.0	0.0
Income from equity method investments									(14.4)	(10.5)	(11.3)
Operating income									75.3	49.8	76.7
Interest expense, net									4.8	3.2	4.2
Other income, net									(0.3)	(0.8)	(0.1)
Income from continuing operations before income taxes									70.8	47.4	72.6
Provision for income taxes									22.6	14.3	24.9
Income from continuing operations									48.2	33.1	47.7
Loss from discontinued operations									(0.8)	(0.6)	(2.3)
Net income									47.4	32.5	45.4
Other comprehensive income (loss)									(14.2)	(40.4)	(34.8)
Comprehensive income									33.2	(7.9)	10.6
Eliminations [Member]
Condensed Income Statements, Captions [Line Items]
Net sales									(204.0)	(185.0)	(226.3)
Cost of goods sold									(203.2)	(187.3)	(222.0)
Gross profit									(0.8)	2.3	(4.3)
Operating expenses:
Selling, general and administrative expenses									0.0	0.0	0.0
Losses and other expenses, net									(0.2)	(0.2)	0.0
Restructuring charges									0.0	0.0	0.0
Goodwill impairment									0.0	0.0	0.0
Impairment of assets									0.0	0.0	0.0
Pension and Other Postretirement Benefit Expense									0.0	0.0	0.0
Income from equity method investments									329.1	204.8	239.3
Operating income									(329.7)	(202.3)	(243.6)
Interest expense, net									0.0	0.0	0.0
Other income, net									0.0	0.0	0.0
Income from continuing operations before income taxes									(329.7)	(202.3)	(243.6)
Provision for income taxes									(0.2)	1.0	(1.5)
Income from continuing operations									(329.5)	(203.3)	(242.1)
Loss from discontinued operations									0.0	0.0	0.0
Net income									(329.5)	(203.3)	(242.1)
Other comprehensive income (loss)									1.3	(4.0)	(2.3)
Comprehensive income									$ (328.2)	$ (207.3)	$ (244.4)