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Guarantees, Other Contingent Liabilities, And Other Matters (Details)
 0 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended 3 Months Ended
Sep. 09, 2011
USD ($)
Jun. 30, 2011
USD ($)
Sep. 30, 2012
USD ($)
Sep. 30, 2011
USD ($)
Mar. 31, 2011
USD ($)
Mar. 31, 2012
USD ($)
Sep. 09, 2011
EUR (€)
Nov. 15, 2005
EUR (€)
Jun. 30, 2011
Cummulative fifteen month proceeds [Member]
USD ($)
Loss Contingencies [Line Items]                  
Company total exposure under guarantees     $ 14,000,000            
Guarantee face amount including unpaid accrued interest     16,000,000 47,000,000   26,000,000      
Fair value of the guarantees     2,000,000 13,000,000   6,000,000      
Other contingent liabilities     4,000,000            
Charge for European Commission fines in Italy 49,100,000                
Fines imposed by European Commission             30,000,000 30,000,000  
Accumulated interest on European Commission fine             5,900,000    
Expected resolution time for appeal, months     18            
Advances to suppliers current and noncurrent     152,000,000 163,000,000   225,000,000      
Valuation allowance amount related to advances to suppliers     63,000,000 68,000,000   74,000,000      
Provision for loss on uncollectible advances to suppliers     4,000,000 6,000,000          
Aggregate balance of recoverable value added tax credits     81,000,000 79,000,000   82,000,000      
Valuation allowance on recoverable value added tax credits     26,000,000 24,000,000   25,000,000      
Brazil audit assessment for tax, penalties, and interest on recoverable value added tax credits     23,000,000            
Reduced Brazil audit assessment for tax, penalties, and interest on recoverable value added tax credits     19,000,000            
Proceeds from insurance settlement, investing activities   9,900,000 0 9,933,000          
Gain on property and equipment fire loss insurance settlement   9,600,000 0 9,592,000          
Gain on business interruption insurance settlement   2,100,000     4,800,000       6,900,000
Reversal of statutory severance liability due to law change in Malawi   $ 4,000,000