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Discontinued Operations (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Discontinued Operations [Abstract]    
Benefit of income from discontinued operations, net of tax associated with prior business divesture   $ 1
Total minimum consideration from sale 450  
Initial cash payment, transactions closes 175  
Total prepayment value of promissory notes 215  
Contingent payment, percentage of quarterly cash payments of adjusted EBITDA 50.00%  
Contingent payment, based on future performance of the acquired business 11.5  
Proceeds from sale of excess inventory of tantalum ore $ 50