Segment Information (Details 1) (USD $) In Millions, unless otherwise specified	3 Months Ended								6 Months Ended	12 Months Ended				9 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Jun. 30, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Sep. 30, 2013
Segment Reporting Information [Line Items]
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest										$ 332.7	$ 383.0	$ 507.0
Segment Reporting Unallocated Corporate Expenses										71.4	70.4	69.0
Receipt of Continued Dumping and Subsidy Offset Act Payment, Net of Unallocated Expenses										0	0	108.0
Defined Benefit Plan, Settlements, Plan Assets										(33.0)	0	0
Net sales to external customers:
Net sales	762.2	788.0	789.2	736.8	749.5	731.4	791.3	763.2	3,035.4	3,076.2	3,035.4	3,359.5	3,359.5
Segment EBIT:
Interest expense										(28.7)	(24.4)	(31.1)
Interest income										4.4	1.9	2.9
Income From Continuing Operations Before Income Taxes										204.0	290.1	517.8
Assets employed at year-end:
Assets employed at year-end	3,001.4				4,477.9					3,001.4	4,477.9	4,244.7
Payments to Acquire Property, Plant, and Equipment										126.8	133.6	118.3
Depreciation and amortization:
Depreciation and amortization										137.0	142.4	149.6
Mobile Industries [Member]
Segment Reporting Information [Line Items]
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest										65.6	193.7	245.2
Net sales to external customers:
Net sales										1,685.4			1,987.4	1,775.8
Assets employed at year-end:
Assets employed at year-end	1,373.8				1,579.3					1,373.8	1,579.3	1,466.2
Payments to Acquire Property, Plant, and Equipment										55.7	48.2	44.2
Depreciation and amortization:
Depreciation and amortization										65.7	71.4	84.1
Process Industries [Member]
Segment Reporting Information [Line Items]
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest										267.1	189.3	261.8
Net sales to external customers:
Net sales										1,390.8			1,372.1	1,259.6
Assets employed at year-end:
Assets employed at year-end	1,209.6				1,157.4					1,209.6	1,157.4	1,072.5
Payments to Acquire Property, Plant, and Equipment										70.1	80.3	70.6
Depreciation and amortization:
Depreciation and amortization										68.8	67.9	63.2
Corporate [Member]
Assets employed at year-end:
Assets employed at year-end	418.0				484.3					418.0	484.3	715.3
Payments to Acquire Property, Plant, and Equipment										1.0	5.1	3.5
Depreciation and amortization:
Depreciation and amortization										2.5	3.1	2.3
Discontinued Operations [Member]
Assets employed at year-end:
Assets employed at year-end	$ 0				$ 1,256.9					$ 0	$ 1,256.9	$ 990.7