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Note 26 - Reorganization Items, Net (Details) - USD ($)
$ in Millions
 1 Months Ended 4 Months Ended 8 Months Ended 12 Months Ended
Aug. 31, 2013
Dec. 31, 2013
Aug. 31, 2013
Dec. 31, 2015
Dec. 31, 2014
Reorganization Items, Net [Line Items]          
Provision for expected allowed claims $ 27        
Successor [Member]          
Reorganization Items, Net [Line Items]          
Professional fees   $ 19   $ 1 $ 10
Provision for expected allowed claims         (1)
Other items, net   (3)   4 4
Reorganization items, net   16   5 13
Cash payments for reorganization items   $ 85   $ 9 $ 21
Predecessor [Member]          
Reorganization Items, Net [Line Items]          
Professional fees     $ 114    
Provision for expected allowed claims     133    
Net gain on reorganization adjustments     (1,957)    
Net gain on fresh start adjustments     (302)    
Other items, net     (14)    
Reorganization items, net     (2,026)    
Cash payments for reorganization items     $ 210