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Note 13 - Commitments and Contingencies (Details) (USD $)
In Millions, unless otherwise specified
0 Months Ended 0 Months Ended 6 Months Ended
Sep. 03, 2013
Jun. 17, 2013
Sep. 30, 2013
Jun. 30, 2013
Sep. 30, 2012
Jun. 17, 2013
Historical [Member]
Jun. 30, 2013
Historical [Member]
Sep. 30, 2013
Surety Bond [Member]
Sep. 30, 2013
Junior DIP Facility [Member]
Sep. 30, 2013
Bank Guarantee and Letter of Credit [Member]
Sep. 30, 2013
Cash and Investment In Trust [Member]
Note 13 - Commitments and Contingencies (Details) [Line Items]                      
Litigation Settlement, Amount $ 18 $ 49                  
Environmental Expense and Liabilities           99 99        
Percentage of Liability Above $99 Million   50.00%   50.00%              
Assets Held-in-trust 31                    
Escrow Deposit 18                    
SiteContingencyNumberOfSitesWithHazardousSubstances         8            
Guarantor Obligations, Maximum Exposure, Undiscounted     34         22 123 10 192
Loss Contingency, Estimate of Possible Loss     $ 49