Guarantees, Other Contingent Liabilities, And Other Matters (Details)	0 Months Ended	6 Months Ended							3 Months Ended	6 Months Ended
	Sep. 09, 2011 USD ($)	Sep. 30, 2014 USD ($)	Sep. 30, 2013 USD ($)	Jun. 30, 2014 USD ($)	Jun. 30, 2014 EUR (€)	Mar. 31, 2014 USD ($)	Sep. 09, 2011 EUR (€)	Nov. 15, 2005 EUR (€)	Jun. 30, 2013 Brazil [Member] USD ($)	Sep. 30, 2014 Santa Catarina [Member] USD ($)	Sep. 30, 2014 Santa Catarina [Member] Minimum [Member] USD ($)	Sep. 30, 2014 Santa Catarina [Member] Maximum [Member] USD ($)	Sep. 30, 2014 Parana [Member] USD ($)	Sep. 30, 2014 Parana [Member] Minimum [Member] USD ($)	Sep. 30, 2014 Parana [Member] Maximum [Member] USD ($)
Guarantees, Other Contingent Liabilities, and Other Matters [Line Items]
Company total exposure under guarantees		$ 33,000,000
Face amount of guarantee including unpaid accrued interest		35,000,000	16,000,000			20,000,000
Fair value of the guarantees		2,000,000	4,000,000			2,000,000
Other contingent liabilities		3,000,000
Brazil audit assessment for tax, penalties, and interest on recoverable value added tax credits										19,000,000			22,000,000
Reduced Brazil audit assessment for tax, penalties, and interest on recoverable value added tax credits										16,000,000
Estimate of possible loss on remaining VAT audit assessment											0	16,000,000		0	18,000,000
Fines imposed by European Commission				53,000,000	38,900,000		30,000,000	30,000,000
Charge Recorded To Accrue European Commission Fine	49,100,000
Accumulated interest on European Commission fine							5,900,000
Total amount of Brazilian IPI federal tax credits made available by court decision									104,000,000
Brazilian federal taxes offset period									5 years
Net book value on tax credits from excise tax case after valuation allowance		36,000,000							90,000,000
Gain on favorable outcome of excise tax case in Brazil		0	81,619,000						81,600,000
Gain on favorable outcome of excise tax case in Brazil, after tax									53,100,000
Diluted earnings per share calculation based on gain from excise tax case in Brazil									1.96
Remaining unused tax credits on excise tax case in Brazil at current exchange rate		52,000,000
Advances to suppliers current and non-current		115,000,000	110,000,000			190,000,000
Valuation allowance amount related to advances to suppliers		38,000,000	42,000,000			46,000,000
Provision for loss on uncollectible advances to suppliers		2,000,000	(4,000,000)
Aggregate balance of recoverable value added tax credits		69,000,000	70,000,000			66,000,000
Valuation allowance on recoverable value added tax credits		$ 37,000,000	$ 27,000,000			$ 30,000,000