Condensed Consolidating Financial Statements (Statements of Operations and Comprehensive Income) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Condensed Income Statements, Captions [Line Items]
Net sales	$ 843.6	$ 1,030.2	$ 1,175.4	$ 834.8	$ 891.8	$ 1,052.3	$ 1,102.1	$ 793.4	$ 3,883.9	$ 3,839.6	$ 3,641.6
Cost of goods sold									2,772.7	2,714.4	2,565.1
Gross profit	224.5	301.9	361.6	223.2	259.8	313.7	340.8	210.9	1,111.2	1,125.2	1,076.5
Operating expenses:
Selling, general and administrative expenses									608.2	637.7	621.0
Losses (gains) and other expenses, net									13.4	7.1	11.3
Restructuring charges									3.0	3.2	1.8
Loss(gain) from natural disaster, net of Insurance recoveries									(10.9)	0.0	0.0
Pension settlement									0.4	0.0	31.4
Loss (gain), net on sale of businesses and related property									27.0	1.1	0.0
Insurance proceeds for lost profits									(27.4)	0.0	0.0
Income from equity method investments									(12.0)	(18.4)	(18.4)
Operating income									509.5	494.5	429.4
Interest expense, net									38.3	30.6	27.0
Other expense (income), net									3.3	(0.1)	(0.3)
Income from continuing operations before income taxes									467.9	464.0	402.7
Provision for income taxes									107.6	156.9	124.1
Income from continuing operations									360.3	307.1	278.6
Loss from discontinued operations									(1.3)	(1.4)	(0.8)
Net income	$ 75.6	$ 108.0	$ 137.6	$ 37.9	$ 43.1	$ 103.5	$ 115.5	$ 43.5	359.0	305.7	277.8
Other comprehensive income (loss), net of tax									(31.4)	37.7	9.6
Comprehensive income									327.6	343.4	287.4
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 (gains) and other expenses, net									2.0	2.0	(3.3)
Restructuring charges									0.0	0.0	0.0
Loss(gain) from natural disaster, net of Insurance recoveries									0.0
Pension settlement									0.0		0.0
Loss (gain), net on sale of businesses and related property									0.0	0.0
Insurance proceeds for lost profits									0.0
Income from equity method investments									(367.4)	(324.3)	(292.4)
Operating income									365.4	322.3	295.7
Interest expense, net									9.0	26.9	24.4
Other expense (income), net									0.0	0.0	0.0
Income from continuing operations before income taxes									356.4	295.4	271.3
Provision for income taxes									(2.6)	(10.3)	(6.5)
Income from continuing operations									359.0	305.7	277.8
Loss from discontinued operations									0.0	0.0	0.0
Net income									359.0	305.7	277.8
Other comprehensive income (loss), net of tax									(15.4)	1.7	14.0
Comprehensive income									343.6	307.4	291.8
Guarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Net sales									3,473.2	3,295.8	3,117.6
Cost of goods sold									2,500.6	2,359.6	2,203.8
Gross profit									972.6	936.2	913.8
Operating expenses:
Selling, general and administrative expenses									555.3	553.6	524.3
Losses (gains) and other expenses, net									5.4	3.3	9.7
Restructuring charges									1.1	2.1	1.9
Loss(gain) from natural disaster, net of Insurance recoveries									(10.9)
Pension settlement									0.0		30.5
Loss (gain), net on sale of businesses and related property									40.3	1.1
Insurance proceeds for lost profits									(27.4)
Income from equity method investments									(70.3)	(74.9)	(40.7)
Operating income									479.1	451.0	388.1
Interest expense, net									18.5	(2.7)	(2.2)
Other expense (income), net									1.5	0.0	0.0
Income from continuing operations before income taxes									459.1	453.7	390.3
Provision for income taxes									92.1	136.2	108.2
Income from continuing operations									367.0	317.5	282.1
Loss from discontinued operations									0.0	0.0	0.0
Net income									367.0	317.5	282.1
Other comprehensive income (loss), net of tax									(15.3)	5.5	8.5
Comprehensive income									351.7	323.0	290.6
Non-Guarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Net sales									1,129.6	1,144.2	728.0
Cost of goods sold									988.7	953.6	564.5
Gross profit									140.9	190.6	163.5
Operating expenses:
Selling, general and administrative expenses									53.6	85.0	96.7
Losses (gains) and other expenses, net									6.3	1.9	5.1
Restructuring charges									1.9	1.1	(0.1)
Loss(gain) from natural disaster, net of Insurance recoveries									0.0
Pension settlement									0.4		0.9
Loss (gain), net on sale of businesses and related property									(13.3)	0.0
Insurance proceeds for lost profits									0.0
Income from equity method investments									(9.9)	(14.5)	(14.4)
Operating income									101.9	117.1	75.3
Interest expense, net									10.8	6.4	4.8
Other expense (income), net									1.8	(0.1)	(0.3)
Income from continuing operations before income taxes									89.3	110.8	70.8
Provision for income taxes									18.0	31.2	22.6
Income from continuing operations									71.3	79.6	48.2
Loss from discontinued operations									(1.3)	(1.4)	(0.8)
Net income									70.0	78.2	47.4
Other comprehensive income (loss), net of tax									(0.7)	30.5	(14.2)
Comprehensive income									69.3	108.7	33.2
Eliminations [Member]
Condensed Income Statements, Captions [Line Items]
Net sales									(718.9)	(600.4)	(204.0)
Cost of goods sold									(716.6)	(598.8)	(203.2)
Gross profit									(2.3)	(1.6)	(0.8)
Operating expenses:
Selling, general and administrative expenses									(0.7)	(0.9)	0.0
Losses (gains) and other expenses, net									(0.3)	(0.1)	(0.2)
Restructuring charges									0.0	0.0	0.0
Loss(gain) from natural disaster, net of Insurance recoveries									0.0
Pension settlement									0.0		0.0
Loss (gain), net on sale of businesses and related property									0.0	0.0
Insurance proceeds for lost profits									0.0
Income from equity method investments									435.6	395.3	329.1
Operating income									(436.9)	(395.9)	(329.7)
Interest expense, net									0.0	0.0	0.0
Other expense (income), net									0.0	0.0	0.0
Income from continuing operations before income taxes									(436.9)	(395.9)	(329.7)
Provision for income taxes									0.1	(0.2)	(0.2)
Income from continuing operations									(437.0)	(395.7)	(329.5)
Loss from discontinued operations									0.0	0.0	0.0
Net income									(437.0)	(395.7)	(329.5)
Other comprehensive income (loss), net of tax									0.0	0.0	1.3
Comprehensive income									$ (437.0)	$ (395.7)	$ (328.2)