Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Components of earnings (loss) from continuing operations before income taxes [Abstract]
United States		$ 31.1	$ 14.1	$ 10.2
Foreign		10.1	9.9	(23.2)
Earnings (loss) from continuing operations before income taxes		41.2	24.0	(13.0)
Federal [Abstract]
Current		0.4	(2.0)	2.6
Deferred		7.1	(95.8)	(2.6)
State [Abstract]
Current		0	0.2	0.2
Deferred		1.1	(21.4)	(0.2)
Foreign [Abstract]
Current		12.7	10.0	6.4
Deferred		(2.3)	1.1	3.4
Total income tax expense (benefit)		19.0	(107.9)	9.8
Reconciliation of federal statutory income tax rate to company's effective income tax rate [Abstract]
Statutory federal tax (in hundredths)		35.00%	35.00%	35.00%
State taxes, net of federal benefit (in hundredths)		2.40%	2.10%	(1.30%)
Taxes on non-U.S. earnings and losses (in hundredths)		(4.90%)	(3.80%)	(23.80%)
Valuation allowance (in hundredths)		8.30%	(471.70%)	(59.30%)
Tax credits (in hundredths)		(6.10%)	(7.10%)	37.00%
Compensation (in hundredths)		1.00%	0.40%	(13.00%)
Tax rate or law changes		1.20%	(9.20%)	0.90%
Uncertain tax positions net of settlements		2.20%	0.40%	(41.90%)
Brazil interest on equity		0.00%	(1.70%)	3.20%
Dividend repatriation (in hundredths)		2.40%	5.80%	(11.40%)
Other (in hundredths)		4.60%	0.20%	(0.80%)
Effective tax rate (in hundredths)		46.10%	(449.60%)	(75.40%)
Valuation Allowance [Line Items]
Reversal of deferred tax asset valuation allowances	119.2		119.2
Foreign tax benefit from law change			2.2
Deferred tax assets [Abstract]
Accounts receivable	0.2	0.3	0.2
Inventories	4.1	3.8	4.1
Plant and equipment	2.4	0.8	2.4
Pension and employee benefits	39.1	50.5	39.1
Net operating loss, capital loss and credit carryforwards	122.4	105.0	122.4
Other, principally accrued liabilities	10.3	6.8	10.3
Total gross deferred tax assets	178.5	167.2	178.5
Less: valuation allowance	(61.2)	(48.0)	(61.2)
Net deferred tax assets	117.3	119.2	117.3
Deferred tax liabilities [Abstract]
Goodwill	4.2	0.6	4.2
Plant and equipment	7.6	5.3	7.6
Other	1.7	1.0	1.7
Total gross deferred tax liabilities	13.5	6.9	13.5
Net deferred tax asset (liability)	103.8	112.3	103.8
Current deferred tax asset	13.0	13.4	13.0
Noncurrent deferred tax asset	98.6	102.7	98.6
Current deferred tax liability (other current liabilities)	(0.5)	(0.4)	(0.5)
Noncurrent deferred tax liability	(7.3)	(3.4)	(7.3)
Reconciliation of unrecognized tax benefits [Roll Forward]
Balance, April 1		2.1	9.0
Gross increases - tax positions in prior period		3.1	2.5
Gross decreases - tax positions in prior period		0	(7.0)
Gross increases - tax positions in current period		0.4	0.1
Settlements		0	(1.9)
Lapse of statute of limitations		0	(0.8)
Effect of exchange rate changes		0	0.2
Balance, March 31	2.1	5.6	2.1	9.0
Unrecognized tax benefits that would impact effective tax rate		3.0
Unrecognized tax benefits accrued interest and penalties	0	0	0
Undistributed foreign earnings [Abstract]
Tax on undistributed earnings of certain joint equity investment		0.8
Undistributed earnings in remaining foreign operations		442.0
Foreign Tax Jurisdictions [Member]
Tax Credit Carryforward [Line Items]
Foreign tax credit carry forwards		1.8
Foreign Tax Jurisdictions [Member] | Minimum [Member]
Tax Credit Carryforward [Line Items]
Tax loss credit carryforward, expiration date		Mar. 31, 2016
Foreign Tax Jurisdictions [Member] | Maximum [Member]
Tax Credit Carryforward [Line Items]
Tax loss credit carryforward, expiration date		Mar. 31, 2017
Federal and State [Member]
Tax Credit Carryforward [Line Items]
Tax credit carryforwards, research and development		20.9
Federal and State [Member] | Minimum [Member]
Tax Credit Carryforward [Line Items]
Tax loss credit carryforward, expiration date		Mar. 31, 2018
Federal and State [Member] | Maximum [Member]
Tax Credit Carryforward [Line Items]
Tax loss credit carryforward, expiration date		Mar. 31, 2035
Foreign Tax Jurisdictions [Member]
Operating Loss Carryforwards [Line Items]
Tax loss carryforwards		186.0
Tax losses subject to expiration		159.3
Tax losses not subject to expiration		145.3
Foreign Tax Jurisdictions [Member] | Minimum [Member]
Operating Loss Carryforwards [Line Items]
Tax loss carryforwards, expiration date		Mar. 31, 2016
Foreign Tax Jurisdictions [Member] | Maximum [Member]
Operating Loss Carryforwards [Line Items]
Tax loss carryforwards, expiration date		Mar. 31, 2034
State and Local [Member]
Operating Loss Carryforwards [Line Items]
Tax loss carryforwards		304.6
State and Local [Member] | Minimum [Member]
Operating Loss Carryforwards [Line Items]
Tax loss carryforwards, expiration date		Mar. 31, 2016
State and Local [Member] | Maximum [Member]
Operating Loss Carryforwards [Line Items]
Tax loss carryforwards, expiration date		Mar. 31, 2034
Austria [Member]
Income Tax Examination [Line Items]
Open tax year for examination by tax jurisdictions		Fiscal 2012 - 2014
Brazil [Member]
Income Tax Examination [Line Items]
Open tax year for examination by tax jurisdictions		Calendar 2010 - 2014
Germany [Member]
Income Tax Examination [Line Items]
Open tax year for examination by tax jurisdictions		Fiscal 2011 - 2014
United States [Member]
Income Tax Examination [Line Items]
Open tax year for examination by tax jurisdictions		Fiscal 2012 - 2014
Foreign Tax Jurisdictions [Member]
Valuation Allowance [Line Items]
Valuation allowance recorded against deferred tax assets		$ 2.6	$ 12.3