Segment Information (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Sep. 30, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest									$ 363.5		$ 332.7	$ 383.0
Segment Reporting Unallocated Corporate Expenses									57.4		71.4	70.4
Unallocated Portion of Pension Settlement Charges									(465.0)		(33.0)	0.0
Net sales to external customers:
Net sales	$ 714.4	$ 707.4	$ 728.0	$ 722.5	$ 762.2	$ 788.0	$ 789.2	$ 736.8	2,872.3	$ 20.6	3,076.2	3,035.4
Segment EBIT:
Interest expense									(33.4)		(28.7)	(24.4)
Interest income									2.7		4.4	1.9
(Loss) Income From Continuing Operations Before Income Taxes									(189.6)		204.0	290.1
Assets employed at year-end:
Assets employed at year-end	2,785.3				3,001.4				2,785.3		3,001.4
Payments to Acquire Property, Plant, and Equipment									105.6		126.8	133.6
Depreciation and amortization:
Depreciation and amortization									130.8		137.0	142.4
Mobile Industries [Member]
Segment Reporting Information [Line Items]
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest									173.3		65.6	193.7
Net sales to external customers:
Net sales									1,558.3		1,685.4	1,775.8
Assets employed at year-end:
Assets employed at year-end	1,240.8				1,373.8				1,240.8		1,373.8
Payments to Acquire Property, Plant, and Equipment									47.5		55.7	48.2
Depreciation and amortization:
Depreciation and amortization									61.4		65.7	71.4
Process Industries [Member]
Segment Reporting Information [Line Items]
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest									190.2		267.1	189.3
Net sales to external customers:
Net sales									1,314.0		1,390.8	1,259.6
Assets employed at year-end:
Assets employed at year-end	1,227.4				1,209.6				1,227.4		1,209.6
Payments to Acquire Property, Plant, and Equipment									57.5		70.1	80.3
Depreciation and amortization:
Depreciation and amortization									68.1		68.8	67.9
Corporate [Member]
Assets employed at year-end:
Assets employed at year-end	$ 317.1				$ 418.0				317.1		418.0
Payments to Acquire Property, Plant, and Equipment									0.6		1.0	5.1
Depreciation and amortization:
Depreciation and amortization									$ 1.3		$ 2.5	$ 3.1