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Stockholders' Equity and Noncontrolling Interests Warrants (Details)
shares in Millions
 6 Months Ended 12 Months Ended
Jul. 10, 2016
Dec. 31, 2016
$ / shares
shares
Dec. 31, 2015
shares
Dec. 31, 2009
Class of Warrant or Right [Line Items]        
Outstanding Warrants | shares   42 70  
Warrants [Member]        
Class of Warrant or Right [Line Items]        
Number Of Tranches of Warrants Issued       2
First Tranche of Warrants [Member]        
Class of Warrant or Right [Line Items]        
Warrants Expiration Date Jul. 10, 2016      
Second Tranche of Warrants [Member]        
Class of Warrant or Right [Line Items]        
Warrants Expiration Date   Jul. 10, 2019    
Exercise Price of Warrants | $ / shares   $ 18.33