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Note 25 - Goodwill (Details) - USD ($)
$ in Millions
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Sep. 03, 2013
Sep. 01, 2013
Goodwill [Line Items]          
Reorganization value of Successor assets $ 2,138 $ 2,556      
Reorganization value of Successor assets in excess of fair value - Successor goodwill $ 88 $ 96 $ 88    
Successor [Member]          
Goodwill [Line Items]          
Reorganization value of Successor assets       $ 3,463 $ 3,463
Less: Fair value of Successor assets (excluding goodwill)         3,375
Reorganization value of Successor assets in excess of fair value - Successor goodwill       $ 88 $ 88